This document discusses analyzing faults in induction motors using finite element analysis with Magnet software. It first describes modeling a healthy 1HP three-phase induction motor in Magnet, including dimensions of the stator, rotor, shaft, bearings, and end rings. Broken rotor bars are then introduced as a fault to study the variation in starting torque. Magnetic field analysis is performed on the healthy and faulty motor models.
1) The document discusses direct torque control (DTC) of induction motors using space vector modulation (SVM-DTC). DTC aims to control torque and flux of the motor but causes current and torque ripple.
2) SVM-DTC is proposed to reduce ripple by increasing the number of available voltage vectors applied to the motor. This provides benefits like lower torque ripple and current distortion.
3) The document then provides background on induction motors, including their construction, operation, speed control, and starting methods before discussing DTC and SVM-DTC in more detail.
1) The document discusses the electromagnetic field analysis of different rotor slot configurations in a single-phase capacitor-run induction motor using a composite rotor conductor made of aluminum and copper sub-conductors.
2) Four models are simulated using the Finite Element Method Magnetics (FEMM) software: a base model and three models with different rotor slot geometries.
3) The simulation results show that Model III has the most sinusoidal flux distribution and the highest efficiency of 83.75%, indicating it is the optimal design configuration among those analyzed.
This document discusses different types of repulsion motors. It begins by explaining the basic operating principle of a repulsion motor, which produces torque when the brushes are shifted from being aligned with the magnetic axis. It then categorizes repulsion motors into four types: standard repulsion motors, compensated repulsion motors, repulsion start induction motors, and repulsion induction motors. For each type, it provides a brief description of the construction and operating characteristics. The document focuses on explaining how each motor variation improves upon the standard repulsion motor design to provide benefits like constant speed operation and higher starting torque.
ZERO SPEED AND EMERGENCY BRAKING SYSTEM FOR ELECTRICAL OVERHEAD TRAVELLING CRANEIAEME Publication
In this paper, zero speed is achieved in drive motor of an Electrical Overhead
Travelling (EOT) crane by means of a dynamic braking system. There are two modes
in the crane operation. The first one is running mode and another one is braking
mode. In the zero speed braking, an induction motor is converted as a braking
mechanism. The dynamic braking circuit is activated during the braking mode. In
EOT crane, a thruster brake system is mostly used and it is an electro-mechanical
device. The thruster brake is installed between the drive motor and gear box for
controlling the load though the electric power is failed. The thruster brake is used to
retard the rotating speed of motor shaft and to stop it at desired position. The Thruster
brake and drive motor are energized simultaneously to run the crane/hoist is called
the running mode and stop the crane/hoist by both are de-energized is called the
braking mode. A small time difference (time clip) between the function of motor and
thruster causes huge impact pulse on the gear box/shaft. This impact pulse may
diminish the gear box/shaft progressively that cause load drop accident. For
avoiding/minimizing the time clip, the drive motor is converted as a braking device
during the braking mode. The drive motor will be turned to zero speed instead of deenergized.
Design and analysis of a premium efficiency (ie3) induction motoreSAT Journals
For designing an induction motor complete dimension of all the parts of the machine must be known in order to satisfy the
customers required specifications. This paper presents the calculation of following design details. (a) The dimensions of the stator
that includes stator packet length and diameter. (b) Details of stator windings and stator slots. (c) Design details of rotor and
rotor slots. (d) Finally, the performance of motor. In order to get the above design details the designer needs the required
customer specifications such as rated power output, rated voltage, speed, frequency, type of stator winding and its connection,
type of rotor winding, working conditions, shaft extension and dimension details etc. The design example of 45kW cage motor is
presented and various tests are also performed.
Keywords: Induction Motor; Designing; Premium Efficiency Motor; Efficiency; Losses; IEC 60034-30-1; IEC 60034-
1 standard.
Induction motor is a veritable machine in the industries today, since is the most widely used electric motor in the
industry. It offers a reasonable performance, manageable torque/speed characteristics and a better efficiency. The aim of this
paper is to examine a comparative analysis of a three phase induction motor for performance evaluation. The computer simulation
and experimental methods were used to carry out the investigations, validation and evaluation of the behavioural characteristics of
the machine. The simulation and experimental results obtained were compared to validate the results obtained from the
experimental method. It was shown that the results from the simulation and experimental methods were in agreement with the
theoretical values of the three phase induction motor. Thus, the results indicated that the relative errors were negligible and the
proposed simulation models accurately predict the equivalent circuit parameters of the induction motor.
This document discusses repulsion motors, including their construction, types, advantages, disadvantages, and applications. Repulsion motors operate based on the principle of magnetic repulsion between the stator and rotor fields. They are classified as single-phase motors and have a stator, rotor connected to a commutator, and brushes. The three main types are compensated repulsion motors, repulsion-start induction-run motors, and repulsion induction motors. Repulsion motors can operate at higher voltages than other commutator motors and are commonly used to power high-speed lifts, fans, pumps, hoists, air compressors, and mining equipment. However, they also have disadvantages like sparking at the brushes and
The document discusses sequencing and interlocking for motors. It covers standard electrical symbols used in wiring diagrams as they relate to motors. It discusses concepts like sequencing, interlocking, starting, stopping, emergency shutdown, protection methods for motors like short circuit, overload, low voltage, phase reversal and overtemperature protection. It also covers reversing motor direction, braking, variable speed starting, jogging/inching. Motor control centers and their wiring diagrams are also mentioned. Induction motors and their working principle is briefly explained. The document provides examples of sequencing, interlocking, automatic sequence control and how to prevent short circuits in control system designs. It discusses manual and magnetic motor starters as well as their circuitry including 2 wire and 3 wire
1) The document discusses direct torque control (DTC) of induction motors using space vector modulation (SVM-DTC). DTC aims to control torque and flux of the motor but causes current and torque ripple.
2) SVM-DTC is proposed to reduce ripple by increasing the number of available voltage vectors applied to the motor. This provides benefits like lower torque ripple and current distortion.
3) The document then provides background on induction motors, including their construction, operation, speed control, and starting methods before discussing DTC and SVM-DTC in more detail.
1) The document discusses the electromagnetic field analysis of different rotor slot configurations in a single-phase capacitor-run induction motor using a composite rotor conductor made of aluminum and copper sub-conductors.
2) Four models are simulated using the Finite Element Method Magnetics (FEMM) software: a base model and three models with different rotor slot geometries.
3) The simulation results show that Model III has the most sinusoidal flux distribution and the highest efficiency of 83.75%, indicating it is the optimal design configuration among those analyzed.
This document discusses different types of repulsion motors. It begins by explaining the basic operating principle of a repulsion motor, which produces torque when the brushes are shifted from being aligned with the magnetic axis. It then categorizes repulsion motors into four types: standard repulsion motors, compensated repulsion motors, repulsion start induction motors, and repulsion induction motors. For each type, it provides a brief description of the construction and operating characteristics. The document focuses on explaining how each motor variation improves upon the standard repulsion motor design to provide benefits like constant speed operation and higher starting torque.
ZERO SPEED AND EMERGENCY BRAKING SYSTEM FOR ELECTRICAL OVERHEAD TRAVELLING CRANEIAEME Publication
In this paper, zero speed is achieved in drive motor of an Electrical Overhead
Travelling (EOT) crane by means of a dynamic braking system. There are two modes
in the crane operation. The first one is running mode and another one is braking
mode. In the zero speed braking, an induction motor is converted as a braking
mechanism. The dynamic braking circuit is activated during the braking mode. In
EOT crane, a thruster brake system is mostly used and it is an electro-mechanical
device. The thruster brake is installed between the drive motor and gear box for
controlling the load though the electric power is failed. The thruster brake is used to
retard the rotating speed of motor shaft and to stop it at desired position. The Thruster
brake and drive motor are energized simultaneously to run the crane/hoist is called
the running mode and stop the crane/hoist by both are de-energized is called the
braking mode. A small time difference (time clip) between the function of motor and
thruster causes huge impact pulse on the gear box/shaft. This impact pulse may
diminish the gear box/shaft progressively that cause load drop accident. For
avoiding/minimizing the time clip, the drive motor is converted as a braking device
during the braking mode. The drive motor will be turned to zero speed instead of deenergized.
Design and analysis of a premium efficiency (ie3) induction motoreSAT Journals
For designing an induction motor complete dimension of all the parts of the machine must be known in order to satisfy the
customers required specifications. This paper presents the calculation of following design details. (a) The dimensions of the stator
that includes stator packet length and diameter. (b) Details of stator windings and stator slots. (c) Design details of rotor and
rotor slots. (d) Finally, the performance of motor. In order to get the above design details the designer needs the required
customer specifications such as rated power output, rated voltage, speed, frequency, type of stator winding and its connection,
type of rotor winding, working conditions, shaft extension and dimension details etc. The design example of 45kW cage motor is
presented and various tests are also performed.
Keywords: Induction Motor; Designing; Premium Efficiency Motor; Efficiency; Losses; IEC 60034-30-1; IEC 60034-
1 standard.
Induction motor is a veritable machine in the industries today, since is the most widely used electric motor in the
industry. It offers a reasonable performance, manageable torque/speed characteristics and a better efficiency. The aim of this
paper is to examine a comparative analysis of a three phase induction motor for performance evaluation. The computer simulation
and experimental methods were used to carry out the investigations, validation and evaluation of the behavioural characteristics of
the machine. The simulation and experimental results obtained were compared to validate the results obtained from the
experimental method. It was shown that the results from the simulation and experimental methods were in agreement with the
theoretical values of the three phase induction motor. Thus, the results indicated that the relative errors were negligible and the
proposed simulation models accurately predict the equivalent circuit parameters of the induction motor.
This document discusses repulsion motors, including their construction, types, advantages, disadvantages, and applications. Repulsion motors operate based on the principle of magnetic repulsion between the stator and rotor fields. They are classified as single-phase motors and have a stator, rotor connected to a commutator, and brushes. The three main types are compensated repulsion motors, repulsion-start induction-run motors, and repulsion induction motors. Repulsion motors can operate at higher voltages than other commutator motors and are commonly used to power high-speed lifts, fans, pumps, hoists, air compressors, and mining equipment. However, they also have disadvantages like sparking at the brushes and
The document discusses sequencing and interlocking for motors. It covers standard electrical symbols used in wiring diagrams as they relate to motors. It discusses concepts like sequencing, interlocking, starting, stopping, emergency shutdown, protection methods for motors like short circuit, overload, low voltage, phase reversal and overtemperature protection. It also covers reversing motor direction, braking, variable speed starting, jogging/inching. Motor control centers and their wiring diagrams are also mentioned. Induction motors and their working principle is briefly explained. The document provides examples of sequencing, interlocking, automatic sequence control and how to prevent short circuits in control system designs. It discusses manual and magnetic motor starters as well as their circuitry including 2 wire and 3 wire
Fuzzy control of a vertical shaft single axis controlled repulsive typeIAEME Publication
1) The document describes a vertical shaft single axis controlled repulsive type magnetic bearing (SACRMB) that uses permanent magnets for radial stability and electromagnets for levitation and axial stability.
2) A fuzzy logic controller is proposed for the axial control of the SACRMB, as it is nonparametric and simple compared to other controllers like PID.
3) Simulation results show that the radial and axial vibrations of the SACRMB controlled by the fuzzy logic controller are within tolerable limits, indicating the design works well.
The document discusses the asynchronous or induction motor, specifically focusing on its construction and working principles. It describes the main components of an asynchronous motor including the stator and rotor, and explains how different types of rotors like squirrel cage and slip ring function through electromagnetic induction to generate torque without a direct electrical connection. The working principle is demonstrated through diagrams showing how a rotating magnetic field is produced in the stator to induce currents in the rotor and make it rotate at a slightly lower synchronous speed.
Diagnosis of broken bars fault in induction machines using higher order spect...ISA Interchange
Detection and identification of induction machine faults through the stator current signal using higher order spectra analysis is presented. This technique is known as motor current signature analysis (MCSA). This paper proposes two higher order spectra techniques, namely the power spectrum and the slices of bi-spectrum used for the analysis of induction machine stator current leading to the detection of electrical failures within the rotor cage. The method has been tested by using both healthy and broken rotor bars cases for an 18.5 kW-220 V/380 V-50 Hz-2 pair of poles induction motor under different load conditions. Experimental signals have been analyzed highlighting that bi-spectrum results show their superiority in the accurate detection of rotor broken bars. Even when the induction machine is rotating at a low level of shaft load (no-load condition), the rotor fault detection is efficient. We will also demonstrate through the analysis and experimental verification, that our proposed proposed-method has better detection performance in terms of receiver operation characteristics (ROC) curves and precision-recall graph.
Three phase induction motors are complex electro-mechanical devices widely used in most industrial applications. Induction motors are susceptible to many types of fault in industrial application such as rotor bar broken fault, stator inter turn fault, eccentricity fault. Out of these faults eccentricity is very specific in squirrel cage induction motor. If the initial stage of motor failure is not identified will cause the severe damage and production shutdowns. This paper presents the simulations of eccentricity fault detection in three phase squirrel cage induction motor under various load conditions for healthy and faulty conditions. In this paper, dynamic model of induction motor is developed using CAD package called MagNet for static and transient 2D analysis. The various machine parameters like stator current, magnetic flux density, and magnetic torque are calculated and their values are compared under healthy and faulty conditions.
The machines subjected to inter-turn short circuit fault can be diagnosed through the characteristic patterns caused by inter-turn short circuit fault components in the DWT analysis by using the stator phase currents.
A Wavelet Based fault Detection of Induction Motor: A Reviewijsrd.com
This paper presents a review of the researches done on fault detection and tolerant control , main aim of the fault tolerant control and fault detection of induction motor is used the wavelet transform. Wavelet transform is much better tool for the fault diagnosis point of view and a overview of the wavelet types (continuous and discrete), machine faults detection methods and their validation. The software, generality of codes, one dimensional and two dimensional DWT and frequency characteristics components of healthy as well as faulty induction motor has explained. So Finally, stator short winding , shaft fault, bearing fault ,rotor broken bar and open winding are taken as a case study to show the better diagnosis of fault by using wavelet techniques.
A novel approach towards handling of bldc motor drive along with faulty hall ...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Unit 5-ACTUATORS AND MECHATRONIC SYSTEM DESIGN-ME6702– MECHATRONICS Mohanumar S
The document discusses different types of electrical motors. It describes DC motors, including brushed and brushless types. It also covers AC motors like synchronous and induction motors. Stepper motors are also summarized, including permanent magnet and variable reluctance types. The key properties and applications of each motor type are highlighted at a high level.
This document discusses basic principles and functions of electrical machines. It provides classifications of electric machines according to power supply and NEMA standards. The key components and operating principles of DC and AC machines are described. Methods for determining machine parameters like resistance and reactance are outlined. The document also covers protection, maintenance, and applications of electric machines.
The document describes the design of an automated magnetizing workstation in the i-Booster assembly line. The workstation magnetizes steel plates that are inserted into the i-Booster core. It magnetizes seven plates in the S-N polarity and the next seven in the N-S polarity using pneumatic cylinders and fingers to transfer the plates. The workstation was modeled using Autodesk Inventor software. It consists of subassemblies like load units, a magnetizing unit, and carriers to load and transfer the plates through the magnetizing and assembly process.
A DC motor operates by generating a force on a current-carrying conductor placed in a magnetic field. It consists of a yoke, poles, pole cores, field winding, armature core, commutator, and brushes. The field winding is energized to create alternating north and south poles. The armature winding inside the armature core cuts this magnetic field to generate an EMF which is converted to DC by the commutator and supplied to an external load through the brushes, causing the motor to rotate.
The cranking circuit includes the starter motor, battery, starter solenoid, and ignition switch. The starter motor uses electromagnetic principles to convert electrical energy from the battery into mechanical rotation of the engine. When the ignition switch is turned on, current flows through the solenoid and starter motor to engage the drive pinion with the flywheel and rotate the engine until it starts.
Induction Motors Faults Detection Based on Instantaneous Power Spectrum Analy...IDES Editor
A method of induction motor diagnostics based on
the analysis of three-phase instantaneous power spectra has
been offered. Its implementation requires recalculation of
induction motor voltages, aiming at exclusion from induction
motor instantaneous three-phase power signal the component
caused by supply mains dissymmetry and unsinusoidality. The
recalculation is made according to the motor known
electromagnetic parameters, taking into account the
electromotive force induced in stator winding by rotor currents.
The results of instantaneous power parameters computation
proved efficiency of this method in case of supply mains voltage
dissymmetry up to 20%. The offered method has been tested
by experiments. Its applicability for detection of several stator
and rotor winding defects appeared in motor simultaneously
has been proved. This method also makes it possible to
estimate the extent of defects development according to the
size of amplitudes of corresponding harmonics in the spectrum
of total three phase power signal.
Ultrasonic motors use piezoelectric materials to convert electrical energy into ultrasonic vibrations, generating motion through friction. They have a stator that transmits vibrations, a rotor that rotates, and a shaft that transfers the rotation. When voltage is applied, the piezoelectric ceramics in the stator vibrate and transmit the vibrations to the rotor through friction, inducing a traveling wave that creates torque to rotate the rotor. Ultrasonic motors offer advantages over conventional motors like high torque at low speeds, compact size, accuracy, and lack of electromagnetic interference. However, they require high-frequency power supplies and have lower durability. Major applications include cameras, hard drives, robots,
This presentation explains in brief how piezo motor works. It also displays different type of piezo motors. It consists of a comparison of Piezo Motors and Electromagnetic motors.
1) The document describes the modeling of an active magnetic bearing control system using finite element analysis.
2) A dynamic model of the active magnetic bearing was developed using ordinary differential equations to describe the electrical behavior of the windings and mechanical behavior of the magnetically suspended shaft.
3) Finite element analysis was used to compute the magnetic field distribution and determine properties of the magnetic bearing actuator like current and position stiffness coefficients.
The document describes the main construction of DC machines. It lists the two major parts as the stator, which houses the field winding, and the rotor, which rotates in the magnetic field. It then describes the other key parts which include the yoke, poles, field winding, armature winding, commutator, and brushes. The yoke forms a protective covering and carries magnetic flux. The poles contain core and shoe components that produce magnetic flux. The field and armature windings use copper wire to generate electromagnetism. The commutator collects alternating current from the armature and converts it to direct current, while the brushes collect this current.
Ultrasonic motors use piezoelectric materials to generate ultrasonic vibrations that produce motion. They were first introduced in 1965 and have advantages over traditional electromagnetic motors like higher torque at lower speeds, greater precision, and no magnetic interference. Common piezoelectric materials used include quartz, barium titanate, and lead zirconate titanate. Ultrasonic motors find applications in areas like cameras, watches, printers, and medical devices due to their small size and precision.
This document discusses synchronous motor drives. Synchronous motors run at a constant synchronous speed when powered by AC current, but drives are used to make starting, pulling in, and braking smoother. Synchronous motors are not self-starting because their rotor cannot match the rotating magnetic field. They are started as induction motors until near synchronous speed, then DC field is applied. Pull in completes when the rotor matches synchronous speed. Dynamic braking is used by disconnecting the motor and connecting it to resistors, causing it to act as a generator and dissipate energy in the resistors.
This document describes the production flow process for energy meters at a company called PEL. It outlines the main departments involved: Press-Shop, Terminal Block Assembly, SMT, Final Assembly, Testing & Calibration, and SPDP. The Press-Shop bends, drills, punches and threads metal components. Terminal Block Assembly connects the metal components and wires. SMT builds the circuit boards. Final Assembly connects all components. Testing & Calibration ensures proper functioning. SPDP provides additional services. Safety measures are taken at each stage of production.
Fuzzy control of a vertical shaft single axis controlled repulsive typeIAEME Publication
1) The document describes a vertical shaft single axis controlled repulsive type magnetic bearing (SACRMB) that uses permanent magnets for radial stability and electromagnets for levitation and axial stability.
2) A fuzzy logic controller is proposed for the axial control of the SACRMB, as it is nonparametric and simple compared to other controllers like PID.
3) Simulation results show that the radial and axial vibrations of the SACRMB controlled by the fuzzy logic controller are within tolerable limits, indicating the design works well.
The document discusses the asynchronous or induction motor, specifically focusing on its construction and working principles. It describes the main components of an asynchronous motor including the stator and rotor, and explains how different types of rotors like squirrel cage and slip ring function through electromagnetic induction to generate torque without a direct electrical connection. The working principle is demonstrated through diagrams showing how a rotating magnetic field is produced in the stator to induce currents in the rotor and make it rotate at a slightly lower synchronous speed.
Diagnosis of broken bars fault in induction machines using higher order spect...ISA Interchange
Detection and identification of induction machine faults through the stator current signal using higher order spectra analysis is presented. This technique is known as motor current signature analysis (MCSA). This paper proposes two higher order spectra techniques, namely the power spectrum and the slices of bi-spectrum used for the analysis of induction machine stator current leading to the detection of electrical failures within the rotor cage. The method has been tested by using both healthy and broken rotor bars cases for an 18.5 kW-220 V/380 V-50 Hz-2 pair of poles induction motor under different load conditions. Experimental signals have been analyzed highlighting that bi-spectrum results show their superiority in the accurate detection of rotor broken bars. Even when the induction machine is rotating at a low level of shaft load (no-load condition), the rotor fault detection is efficient. We will also demonstrate through the analysis and experimental verification, that our proposed proposed-method has better detection performance in terms of receiver operation characteristics (ROC) curves and precision-recall graph.
Three phase induction motors are complex electro-mechanical devices widely used in most industrial applications. Induction motors are susceptible to many types of fault in industrial application such as rotor bar broken fault, stator inter turn fault, eccentricity fault. Out of these faults eccentricity is very specific in squirrel cage induction motor. If the initial stage of motor failure is not identified will cause the severe damage and production shutdowns. This paper presents the simulations of eccentricity fault detection in three phase squirrel cage induction motor under various load conditions for healthy and faulty conditions. In this paper, dynamic model of induction motor is developed using CAD package called MagNet for static and transient 2D analysis. The various machine parameters like stator current, magnetic flux density, and magnetic torque are calculated and their values are compared under healthy and faulty conditions.
The machines subjected to inter-turn short circuit fault can be diagnosed through the characteristic patterns caused by inter-turn short circuit fault components in the DWT analysis by using the stator phase currents.
A Wavelet Based fault Detection of Induction Motor: A Reviewijsrd.com
This paper presents a review of the researches done on fault detection and tolerant control , main aim of the fault tolerant control and fault detection of induction motor is used the wavelet transform. Wavelet transform is much better tool for the fault diagnosis point of view and a overview of the wavelet types (continuous and discrete), machine faults detection methods and their validation. The software, generality of codes, one dimensional and two dimensional DWT and frequency characteristics components of healthy as well as faulty induction motor has explained. So Finally, stator short winding , shaft fault, bearing fault ,rotor broken bar and open winding are taken as a case study to show the better diagnosis of fault by using wavelet techniques.
A novel approach towards handling of bldc motor drive along with faulty hall ...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Unit 5-ACTUATORS AND MECHATRONIC SYSTEM DESIGN-ME6702– MECHATRONICS Mohanumar S
The document discusses different types of electrical motors. It describes DC motors, including brushed and brushless types. It also covers AC motors like synchronous and induction motors. Stepper motors are also summarized, including permanent magnet and variable reluctance types. The key properties and applications of each motor type are highlighted at a high level.
This document discusses basic principles and functions of electrical machines. It provides classifications of electric machines according to power supply and NEMA standards. The key components and operating principles of DC and AC machines are described. Methods for determining machine parameters like resistance and reactance are outlined. The document also covers protection, maintenance, and applications of electric machines.
The document describes the design of an automated magnetizing workstation in the i-Booster assembly line. The workstation magnetizes steel plates that are inserted into the i-Booster core. It magnetizes seven plates in the S-N polarity and the next seven in the N-S polarity using pneumatic cylinders and fingers to transfer the plates. The workstation was modeled using Autodesk Inventor software. It consists of subassemblies like load units, a magnetizing unit, and carriers to load and transfer the plates through the magnetizing and assembly process.
A DC motor operates by generating a force on a current-carrying conductor placed in a magnetic field. It consists of a yoke, poles, pole cores, field winding, armature core, commutator, and brushes. The field winding is energized to create alternating north and south poles. The armature winding inside the armature core cuts this magnetic field to generate an EMF which is converted to DC by the commutator and supplied to an external load through the brushes, causing the motor to rotate.
The cranking circuit includes the starter motor, battery, starter solenoid, and ignition switch. The starter motor uses electromagnetic principles to convert electrical energy from the battery into mechanical rotation of the engine. When the ignition switch is turned on, current flows through the solenoid and starter motor to engage the drive pinion with the flywheel and rotate the engine until it starts.
Induction Motors Faults Detection Based on Instantaneous Power Spectrum Analy...IDES Editor
A method of induction motor diagnostics based on
the analysis of three-phase instantaneous power spectra has
been offered. Its implementation requires recalculation of
induction motor voltages, aiming at exclusion from induction
motor instantaneous three-phase power signal the component
caused by supply mains dissymmetry and unsinusoidality. The
recalculation is made according to the motor known
electromagnetic parameters, taking into account the
electromotive force induced in stator winding by rotor currents.
The results of instantaneous power parameters computation
proved efficiency of this method in case of supply mains voltage
dissymmetry up to 20%. The offered method has been tested
by experiments. Its applicability for detection of several stator
and rotor winding defects appeared in motor simultaneously
has been proved. This method also makes it possible to
estimate the extent of defects development according to the
size of amplitudes of corresponding harmonics in the spectrum
of total three phase power signal.
Ultrasonic motors use piezoelectric materials to convert electrical energy into ultrasonic vibrations, generating motion through friction. They have a stator that transmits vibrations, a rotor that rotates, and a shaft that transfers the rotation. When voltage is applied, the piezoelectric ceramics in the stator vibrate and transmit the vibrations to the rotor through friction, inducing a traveling wave that creates torque to rotate the rotor. Ultrasonic motors offer advantages over conventional motors like high torque at low speeds, compact size, accuracy, and lack of electromagnetic interference. However, they require high-frequency power supplies and have lower durability. Major applications include cameras, hard drives, robots,
This presentation explains in brief how piezo motor works. It also displays different type of piezo motors. It consists of a comparison of Piezo Motors and Electromagnetic motors.
1) The document describes the modeling of an active magnetic bearing control system using finite element analysis.
2) A dynamic model of the active magnetic bearing was developed using ordinary differential equations to describe the electrical behavior of the windings and mechanical behavior of the magnetically suspended shaft.
3) Finite element analysis was used to compute the magnetic field distribution and determine properties of the magnetic bearing actuator like current and position stiffness coefficients.
The document describes the main construction of DC machines. It lists the two major parts as the stator, which houses the field winding, and the rotor, which rotates in the magnetic field. It then describes the other key parts which include the yoke, poles, field winding, armature winding, commutator, and brushes. The yoke forms a protective covering and carries magnetic flux. The poles contain core and shoe components that produce magnetic flux. The field and armature windings use copper wire to generate electromagnetism. The commutator collects alternating current from the armature and converts it to direct current, while the brushes collect this current.
Ultrasonic motors use piezoelectric materials to generate ultrasonic vibrations that produce motion. They were first introduced in 1965 and have advantages over traditional electromagnetic motors like higher torque at lower speeds, greater precision, and no magnetic interference. Common piezoelectric materials used include quartz, barium titanate, and lead zirconate titanate. Ultrasonic motors find applications in areas like cameras, watches, printers, and medical devices due to their small size and precision.
This document discusses synchronous motor drives. Synchronous motors run at a constant synchronous speed when powered by AC current, but drives are used to make starting, pulling in, and braking smoother. Synchronous motors are not self-starting because their rotor cannot match the rotating magnetic field. They are started as induction motors until near synchronous speed, then DC field is applied. Pull in completes when the rotor matches synchronous speed. Dynamic braking is used by disconnecting the motor and connecting it to resistors, causing it to act as a generator and dissipate energy in the resistors.
This document describes the production flow process for energy meters at a company called PEL. It outlines the main departments involved: Press-Shop, Terminal Block Assembly, SMT, Final Assembly, Testing & Calibration, and SPDP. The Press-Shop bends, drills, punches and threads metal components. Terminal Block Assembly connects the metal components and wires. SMT builds the circuit boards. Final Assembly connects all components. Testing & Calibration ensures proper functioning. SPDP provides additional services. Safety measures are taken at each stage of production.
The NEW New West Economic Forum: Dr. Nigel Murray, Panel Speakerinvestnewwest
Royal Columbian Hospital in New Westminster is undergoing redevelopment and expansion to update its 428-bed facility. The project will help the hospital serve the growing population of British Columbia and provide world-class healthcare. In the interim, the hospital is increasing services like a new multipurpose interventional suite to provide better care. The redevelopment envisions creating an academic campus that enhances the community's quality of life through healthcare and education.
The document discusses different types of energy:
- Energy exists in different forms and can change between forms but the total amount of energy remains constant.
- The types of energy discussed include kinetic, light, heat, chemical, electrical, nuclear, and gravitational energy.
- Each type of energy is explained briefly, for example light energy is electromagnetic radiation and kinetic energy can convert to potential energy.
An Approach to Improve Brain Disorder Using Machine Learning TechniquesIOSR Journals
This summary provides an overview of an approach to improve diagnosis of attention deficit hyperactivity disorder (ADHD) using machine learning techniques. The study applies various machine learning algorithms like support vector machines (SVM), K-nearest neighbors (KNN), and co-training to electroencephalography (EEG) signals from patients in order to better classify and diagnose ADHD. MATLAB is used to analyze the EEG data and evaluate the performance of different machine learning methods at decomposing the signals, selecting relevant features, and determining the most effective approach for addressing brain disorders like ADHD. The goal is to develop a decision support system that can more accurately diagnose ADHD through analysis of brain activity patterns in EEG data using supervised and semi-supervised machine learning
This document summarizes the design and study of a compact and wideband microstrip U-slot patch antenna for Wi-Max applications. The antenna was designed to operate in the 5.25GHz Wi-Max band with very low return loss. Design formulas are provided to calculate the dimensions of the rectangular microstrip patch antenna. Simulation results show the return loss is below -30dB from 5.15GHz to 5.85GHz, meeting the bandwidth requirements. The proposed antenna design achieves wideband operation using a 3-layer substrate with total thickness of 1.6mm.
An Adaptive Masker for the Differential Evolution AlgorithmIOSR Journals
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2) Setting up a website requires choosing a domain name and web hosting service, which is a small initial investment.
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The induction braking coil works by shorting the circuit around the stepper motor pins when activated by a relay, which stops the shaft of the vehicle momentarily. The IR sensing circuit uses a 555 timer and relay switching to sense obstructions, activating one relay to stop the DC motor and another to energize the induction braking coil, providing two mechanisms to brake the hybrid vehicle model. The induction braking coil provides an additional braking mechanism to the vehicle by shorting the stepper motor when a relay is triggered by the IR sensing circuit.
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Presentation for unit V in Mechatronics excluding case study. Stepper motor, servo motor, design procedure, Traditional and Mechatronic design approach
The document provides information about permanent magnet DC motors and brushless DC motors. It discusses the construction, working principle, and applications of permanent magnet DC motors. It then describes the construction of brushless DC motors including the stator, rotor, position sensors. It explains the working of trapezoidal and sinusoidal brushless DC motors. Trapezoidal BLDC motors have trapezoidal back-EMF and current waveforms for smooth torque production, while sinusoidal BLDC motors have sinusoidal waveforms.
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Detection of Broken Bars in Three Phase Squirrel Cage Induction Motor using F...Dr.NAGARAJAN. S
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This document provides a review of mobility management techniques in vehicular ad hoc networks (VANETs). It discusses three modes of communication in VANETs: vehicle-to-infrastructure (V2I), vehicle-to-vehicle (V2V), and hybrid vehicle (HV) communication. For each communication mode, different mobility management schemes are required due to their unique characteristics. The document also discusses mobility management challenges in VANETs and outlines some open research issues in improving mobility management for seamless communication in these dynamic networks.
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1. IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
e-ISSN: 2278-1676 Volume 5, Issue 1 (Mar. - Apr. 2013), PP 01-08
www.iosrjournals.org
Magnet Software Based Fault Analysis of Induction Motor Using
Finite Element Analysis
K. Mohanraj1, Aditi Mohapatra2, Dr. S. S. Dash3 and Arun Noyal Doss4
1
Asst. Professor, Department of Electrical & Electronics Engineering, SRM University, Tamil Nadu, India
2
PG scholar, Department of Electrical & Electronics Engineering, SRM University, Tamil Nadu, India
3
Department Head, Department of Electrical & Electronics Engineering, SRM University, Tamil Nadu, India
4
Asst. Professor, Department of Electrical & Electronics Engineering, SRM University, Tamil Nadu, India
Abstract : Induction motor is one of the most commonly preferred motors used in the industry due to its long
life & rugged construction. Faults occurring in an induction motor can significantly affect the performance of
the motor and the drive which is running it. This project aims to study & analyze the faults which can occur
internally in an induction motor .To implement fault analysis first the machine is modeled using MAGNET
software. The motor is studied under healthy conditions. Subsequently faults are introduced & fault analysis is
carried out. In the model of induction rotor bars are broken and the study is mostly based on magnetic field
analysis of the motor under healthy conditions & under faulty conditions. The variation of starting torque with
respect to increasing number of broken rotor bars is studied and a graph was plotted to show the variation.
Keywords: MAGNET Software, Finite Element Analysis, Magnetic Field Intensity.
I. Introduction
Motors convert electrical energy to mechanical energy by the interaction of magnetic fields set up by in
the stator & rotor windings. All the four motors have the same operating components: stator (stationary parts),
rotor (rotating parts), bearings & enclosure. The name induction motor arises from the nature of the developed
torque. Torque is developed when voltage is applied to the stator and current begins to flow in the stator
windings.
The stator winding currents produce a magnetic field that rotates in a counterclockwise direction. The
changing magnetic field of the stator induces electromotive force in the rotor cage winding. The induced emf
causes current to flow and magneto motive force in the rotor windings. In turn the rotor mmfs produce a
magnetic flux pattern which also rotates in the air gap at the same speed as the stator winding field. Induction
motors are the most commonly used prime movers in industrial applications. They are best suited for constant
speed applications. Speed control can also be done with the help of power converter circuits. The 3-phase
squirrel cage induction motor is the workforce of the industry as it is rugged & reliable.
The interaction between the primary field and secondary currents produces torque from zero rotor
speed onwards. The rotor speed at which the rotor currents are zero is called ideal no-load or synchronous
speed. The rotor windings may be multiphase (wound motors) or made of bars short-circuited by end rings (cage
rotors). All primary and secondary windings are placed in the uniform slots stamped into thin silicon steel sheets
called laminations. The induction machine has a rather uniform air gap of 0.2 to 3mm.The secondary windings
may be short circuited or connected to an external impedance or to a power source of variable voltage and
frequency.
Induction motors are the most commonly used prime movers in industrial applications. They are best
suited for constant speed applications. Speed control can also be done with the help of power converter circuits.
The 3-phase squirrel cage induction motor is the workforce of the industry as it is rugged & reliable. Electrical
related faults are frequently occurring faults in three-phase induction machine which will produce more heat on
both stator and rotor winding. This leads to the reduction the life time of induction machine.
Stator winding fault in Induction Motors can be detected using Unknown Input Observer (UIO) &
Extended Kalman Filter methods. They are used for speed estimation and fault detection methods
respectively[1].Using analysis of permeance and MMF harmonics, frequency of air gap flux density harmonics
which occur due to irregularities are calculated. It helps in detecting faulty ball bearing conditions [2]. A
procedure for electromagnetic design of three phase Induction Motor is discussed. This procedure is based on
self-consistent equations. The electrical and magnetic properties are imposed by the user but the geometric
dimensions are automatically calculated [3].The choice between Copper rotor bars and fabricated Aluminum
rotor bars is discussed and debated. The fundamentals of rotor construction and basic information on how the
Induction Motor works are discussed [10]. The new IEC standard which defines the stator winding insulation
requirement when the Induction Motor operates with Adjustable frequency drives (AFDs) is discussed. The
www.iosrjournals.org 1 | Page
2. Magnet Software Based Fault Analysis Of Induction Motor Using Finite Element Analysis
magnetic noise that may be generated if higher frequency voltage harmonics are present in the AFD is
minimized.
This paper discusses the designing of healthy 1HP Three Phase Induction Motor using MAGNET
software. Subsequently the variation of starting torque is studied once broken rotor bar fault is introduced using
MAGNET software.
II. Designing The Three Phase Induction Motor Using Magnet Software
Designing the induction motor consists of designing the stator, rotor, ball bearings, end rings & shaft.
The stator consists of the stator core & winding. Stator core is made up of laminated sheet steel of thickness of
0.5mm. The stator core internal diameter & length are the main dimensions of the induction motor. All the
values of the diameter & length have been by measuring them from a real induction motor .Hence the respective
values for diameters of different parts are:
1. Stator frame-600mm
2. Stator Bore-460mm
3. Rotor-324mm
4. Shaft-1mm
5. Ball bearings-2.2mm
6. End Rings-3mm
The length of the motor has been assumed to be 40.5mm. Air gap can be calculated from the following
formulae:
1. Lg=0.2+2[(DL)^1/2] in mm where Lg-air gap, D=Diameter of the stator bore & L= Length of the
motor.
2. Lg=0.2+D in mm where D is the diameter of the stator.
Rotor core is made up of laminated sheet steel of thickness 0.5mm.The Copper bars & end rings are
directly casted over the rotor core. The current rating assigned=7.5Amperes & Number of conductors=100.
When Copper is employed, the rotor bars are inserted on the slots from the end of the rotor & end-rings are
joined to them by bracing. Cold Rolled Stainless Steel is used as design material for stator, rotor, and ball
bearing. Aluminium is used for the construction of end ring. The bars used in the rotor are made up of Copper &
are skewed. The conductors used are also made up of copper.
Fig 1: Designed Model of Three Phase Induction Motor Using MAGNET
Fig.1. shows the front view of induction motor which has been designed with the help of MAGNET
software. It consists of a stator, rotor, end rings, ball bearings, & shaft in the decreasing order of the radius. The
orange-coloured rectangular structures around the shaft depict the windings. Phase-excitation has been given to
only 1 of the phases which can be seen as a small dot on 1 of the winding & a small cross on the other winding.
They depict the entering & leaving of the current in the coil respectively. The orange-coloured structures on the
rotor depict the skewed Copper bars. The X & Y coordinate axis is in meters.
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3. Magnet Software Based Fault Analysis Of Induction Motor Using Finite Element Analysis
Fig.2.Close View of the Induction Motor
Fig.2. shows a close view of the induction motor modelled using MAGNET software. Shaft is denoted
by the white coloured cylindrical structure protruding outside.
Fig. 3. Checking leakage of modeled induction motor
In MAGNET software an area depicted by the deep-red colour shown above is a proof that the
component doesn’t have any holes or leakage. In the above figure it means the stator component is perfectly
designed and it doesn’t have any leakages or air gap. Similarly the accuracy of the design of all the components
was verified by implementing the features of the MAGNET software to all other parts.
Fig. 4. Arrow Plot of the Field created
Fig.4. depicts the arrow plot of the magnetic field lines. The red colored lines show heavy
magnetization while the blue color arrows show relatively weak magnetization. The direction of the magnetic
field is in accordance with the polarity of the excitation. The left-hand side pole windings are given positive
excitation & the right-hand side pole windings have been given negative polarity. Hence one can clearly see the
magnetic flux lines rotating in an anticlockwise direction. The magnetic field is the strongest near the stator
poles and then on the rotor slots. This observation is in accordance with the working principles of an induction
motor
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4. Magnet Software Based Fault Analysis Of Induction Motor Using Finite Element Analysis
III. The Finite Element Analysis Approach
In order to implement the model, we are using MAGNET software. MAGNET software differs in its
approach when it comes to conventional machine design with respect to the fact that it uses finite element
analysis. It is due to the fact that there are several limitations of the conventional machine design. The
conventional methods of design are based on the assumed flux path method for the determination of the flux
distribution inside machine. They use analytical formulae based on lumped parameters estimated using linear
magnetic circuit model. The machines are assumed to have infinitely deep rectangular slots and the core of the
machine is operated under saturated condition. These assumptions may not be suitable in present day design of
Electrical Machines with complex geometries and material non-linearity. The key limitation of magnetic circuits
or permeance method is that it requires assumptions of the magnetic flux path. The length of the cross-sectional
areas of all the paths must be known. Usually they are assumed to consist of straight lines, which is erroneous.
There are situations where analytical solution is difficult. For instance, in irregular problem region, it is
mathematically impossible to describe boundaries. Configuration may be composed of several different
materials whose regions are mathematically difficult to describe.
In finite element analysis, the software requires no assumption of flux path or related empirical factors.
It accurately calculates magnetic fields and related motor design parameters for motors of complicated
geometries with saturation and/permanent magnets. The finite element analysis is a numerical computation
method which derives its name from finite elements into which the region is partitioned.
In finite element analysis based variational approach; field problem is formulated in terms of a
variational expression called energy functional. This expression can be identified with energy stored in a system.
Minimization of the energy functional leads to Euler’s equation which is the partial differential equation
describing the field. A function is searched that minimizes the energy functional directly instead of attempting to
solve the differential equation. Natural boundary conditions (Dirichlet or homogeneous Neumann boundary) are
inherent in functional formulation.
In order to implement the variational approach by means of numerical computations, the continued
functions representing exact solution is approximated by functions defined over each of the discrete sub regions
into which the field is subdivided. The resulting system of equations is small enough to permit the use of very
rapidly converging solution techniques.
The system of equations which govern the process of finding out the exact solution using finite element
analysis are:
A
4 dl (1)
r
A A
J (2)
x dx y dy
B
F .b.db da J . A.da
R 0 R
(3)
Where A is the Magnetic Vector Potential, µ is the permeability of the magnetic material, l is length of
the homogeneous conductor is the radius vector from the axes to the conductor. J denotes the current density; B,b
denote the magnetic field while H denotes the magnetic field intensity.∮ represents the closed loop integral of the
enclosed function.
The application of the finite element method in the design of electrical machines is proficient in the
determination of important design parameters, such as flux linkages, induced voltages, core losses, winding
inductances and electromagnetic torque developed, with a very high accuracy.
3.1 Flux Plots
Prediction of flux distribution is very useful for the design process. It gives the status of magnetic
saturation throughout the machine as well as the ratio of leakage to useful flux in various parts of the magnetic
circuit. Once the value of the vector potential has been determined at each node, the flux distribution is plotted
as shown in Fig.7.Assuming that z is the direction of currents, the vector potential has only one component in z-
direction, and the magnetic field B is given by:
B A (4)
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5. Magnet Software Based Fault Analysis Of Induction Motor Using Finite Element Analysis
A A
A x0 y0 (5)
Y X
3.2 Calculation of Flux Linkages
Consider one pole of the motor carrying a concentrated winding. The flux that is linked by a
representative turn of a coil can be expressed in terms of the flux density B and the area enclosed by the coil.
Thus,
B.dS (6)
The expression for the flux will be:
A.dS (7)
Using Stroke’s Theorem,
A dl (8)
where the integration is around the closed contour of the coil.
Since the length of the winding in the axial direction is always greater than the distance between the
coil sides, the end contribution in the integral may be neglected. If the vector potential on the right and left hand
coil sides of the coil is denoted as AR and AL respectively, then the flux will be:
l ( AR AL ) (9)
where l is the core length. For a multi turn coil having N turns, the flux linkages are:
N Nl ( AR AL ) (10)
If the current carried by each conductor of the winding is i, then the inductance of the winding will be:
N Nl ( AR AL )
L (11)
i i
At this point, non-linear continuum problem represented by Equation (1), Equation (2) & Equation (3)
will be reduced to a set of non-linear algebraic equations. The most common solution method is the Newton-
Raphson (N-R) algorithm and the resulting set of equations is solved by Gaussian elimination. The N-R
algorithm starts from an assumed value for the reluctivity and proceeds by means of iterations. In each
iteration, is updated with respect to the B-H characteristics of the material.
IV. Analysis Of Healthy Three Phase Induction Motor
After the three phase motor was designed, it was simulated in 2D. The resultant magnetic field
intensity plot was obtained and analyzed.
The resultant field circle graph shows the magnetic field intensity at a radius of 160mm from the centre
at various points around the circle. From point 0 to 0.05, H is highest as this part of the rotor comes directly
under the stator and is the slot area of the rotor. Just as it reaches the edge of the rotor pole, it becomes 0. It
remains 0 from 0.05 to 0.1 as some of the part of this region falls in the air gap and most of the field lines pass
through this region due to low reluctance.
Fig. 5. Variation of Magnetic Field Intensity with Radii for Healthy Motor
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6. Magnet Software Based Fault Analysis Of Induction Motor Using Finite Element Analysis
The breaks in the peaks arise due to the positioning of the rotor copper bars with respect to the stator
poles. When they are perfectly aligned, the field intensity is less compared to when they are just moving out of
the influence of 1 stator pole & entering the influence of the second. The torque value was calculated to be
15.92 Nm under healthy conditions.
V. Analysis Of Three Phase Induction Motor With Broken Rotor Bars
Out of 18 rotor bars, four bars were broken in the new design to introduce broken rotor bars fault. The
design is shown in Fig. 6. The black slots represent the slots where four rotor bars are broken. The plot of
magnetic field intensity with respect to various points on the circle of a radius 160mm was plotted. The point
160mm from the centre was chosen and it lies on the rotor.
Fig. 6. Induction Motor with 4 Broken Bars
From Fig.7 some clear observations can be made. Firstly, the overall nature of the graph doesn’t
change; the graph still has peaks & troughs like the previous plot of healthy motor. However, there are more
breaks in the waveform. The waveform becomes more distorted due to the uneven magnetic fields caused due to
the broken bars. The second observation that can be made is that the value of the magnetic field intensity drops
as the flux linking the rotor from the stator drops due to interference from the broken bars. The magnitude drops
considerably; it reduces by almost a factor of 1.5.
Fig. 7. Variation of Magnetic Field Intensity for Unhealthy Motor.
A similar change in design was made with 9 & 15 broken bars. The discretization plots showed errors
as the magnetic fields became disturbed. The torque was calculated in all the three cases: with four broken bars,
nine broken bars & with fifteen broken bars & inferences were drawn from the results. Fig. 8 shows the
designed model of the induction motor with 9 broken bars. Fig. 9 shows a graph plotted taking values from
Table I.
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7. Magnet Software Based Fault Analysis Of Induction Motor Using Finite Element Analysis
TABLE I. STARTING TORQUE DEVELOPED UNDER
VARIOUS CONDITIONS
Induction Motor Designed Starting Torque Developed
Healthy 15.92Nm
4 Broken Bars 17.75Nm
9 Broken Bars 22.6Nm
15 Broken Bars 32.39Nm
Fig. 8. Three Phase Induction Motor with 9 Broken Bars
Fig. 9. Plot Showing the Variation of Starting Torque with Number of Broken Bars
VI. Conclusion
A healthy three phase induction motor was designed using MAGNET software. Its magnetic field
intensity was analyzed near the rotor bars. Afterwards, changes in the design were made. Rotor bars were
broken-first 4, then 9 & then 15. Magnetic field intensity was shown to decrease and the waveform started
becoming more distorted. The torque under starting conditions increased with the increase in the number of
damaged broken bars. Starting torque first increased slowly but as more bars were broken, the slope of the curve
became steeper showing higher rate of change of starting torque. This shows that as more & more bars are
damaged, the magnetic field becomes more & more distorted. Its magnitude decreases. To compensate for the
decrease in magnetic field, the motor torque goes on increasing to very high levels which can lead to dangerous
oscillations.
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8. Magnet Software Based Fault Analysis Of Induction Motor Using Finite Element Analysis
References
[1] Knight A.M., Bertani S.P.: Mechanical Fault Detection in a Medium Sized Induction Motor Using Stator Current Monitoring, IEEE
Transactions on Energy Conversion, Vol.20, No.4, December 2005.
[2] Dorrel D.G., Evans L., Staton D.A., Knight A.M.: Comparison of Permanent Magnet Drive Motor with a Cage Induction Motor
Design for a Hybrid Electric Vehicle, The International Power Electronics Conference, 2010.
[3] Dorrel D.G., Combined Thermal and Electromagnetic Analysis of Permanent Magnet and Induction Machines to Aid Calculation,
IEEE Transactions on Industrial Electronics, Vol 55, No.10.October 2008, pp.3566-3574.
[4] Ghazal M., Poshtan J., Robust Stator Winding Fault Detection in Induction Motors, 2 nd Power Electronics, Drive Systems &
Technologies Conference, 2011.
[5] Vargan L.M, Jatskevich J., Marti J.R., Load Modelling of an Induction Motor Operated with a Variable Frequency Drive, IEEE
Electrical Power & Energy Conference, 2008.
[6] Arabaci H., Bilgin O., Effect of Rotor Faults in Squirrel-CagecInduction Motors on The Torque-Speed Curve, The 19th International
Conference on Electrical Machines-ICEM 2010,Rome.
[7] Watson J.F., Paterson N.C., The Development of an Accurate Finite Element Model to Investigate the Factors which Influence the
Fault-Indicating Components of Current in Three-Phase Induction Motors, The Ninth International Conference on Electrical
Machines and Drives, Conference Publication No.468,pp. 247-252.
[8] Boglietti A., Cavagnino A., Lazzari M., Geometrical Approach to Induction Motor Design, The 33 rd Annual Conference of the
IEEE Industrial Electronics Society (IECON), Nov 5-8, Taipei, Taiean, pp.149-156.
[9] Nawrocki S., Hao L., Tang X., Modelling and Analysis of Weld Short Faults of Bar-Wound Propulsion IPM Machine, Part-
2,Phase-to-Phase Short, IEEE Transactions, 2011.
[10] Hayes P.E.,Wood B.M.,Horn D.G., Mechanical Design of Induction Motors Applied on Adjustable Speed Drives, IEEE IAS PCIC
Conference Record,1997.
Mr.K.Mohanraj is currently working as Assistant Prof. in SRM University, Chennai. He
completed his B.E in Electrical Engineering from Madras University & M.E. in Power
Electronics and Drives from Anna University in 2004& is currently pursuing his PhD from
SRM University. He has 3 international journal publications& has presented papers in more
than 10 international conferences. His areas of interest include Fault Analysis in Induction
Motors, Power Converters & AC drives.
Aditi Mohapatra completed her Bachelor in Technology from Biju Patnaik University of
Technology, Odisha, India in Electrical and Electronics Engineering in the year 2010 and is
currently a PG Scholar in Power Electronics and Drives from ,SRM University , Chennai,
Tamil Nadu, India. Her area of interests include Induction Motor and Synchronous Motor
Drives , their control, and Hybrid Electric Vehicles.
Dr.S.S.Dash received the M.E degree in Electrical Engineering from UCE Burla, Orissa,
India and PhD degree in Electrical Engineering from Anna University in 1996 and 2006
respectively. He is presently working as Professor and Head in SRM University Chennai,
India. His area of interest includes Power Quality, Inverters, Multilevel Inverters, Power
System Operation, Control & Stability and Intelligent control Techniques.
Mr. Arun Noyal Doss was born in India in 1982. He received his B.E in electrical
engineering from Madras University in 2004 and M.E from Anna university in 2006. He is
currently working towards his PhD degree in electrical engineering and working as assistant
professor in SRM university. His area of interest includes Power Electronics and Special
Machines.
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