ppt on dc motor
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The document discusses brushed DC motors. It explains that they have permanent magnets on the stator and a spinning armature on the inside. When electricity is applied to the electromagnet, it creates a magnetic field that attracts and repels the magnets, causing the armature to spin. It also notes that brushed DC motors use internal commutation and stationary magnets to generate torque from a DC power supply.
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Dc motor
The document discusses DC motors. It defines a DC motor as a machine that converts DC power into mechanical energy. It explains that DC motors operate by generating a magnetic field from coils of wire inside the motor that interacts with a static magnetic field from permanent magnets, causing the shaft to rotate. The document outlines the main types of DC motors - shunt, series, and compound - and provides examples of their applications. It notes advantages like high starting torque and speed control, and disadvantages such as higher costs.
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This document discusses DC motors, including their basic parts and working principles. A DC motor converts electrical energy to mechanical energy using electromagnetic principles. It consists of a rotor and stator, with the rotor containing windings that spin when current is passed through in the presence of a magnetic field. The document compares DC motors to generators and lists different types of motors, explaining the basic operation of a simple DC motor.
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This document provides information about direct current (DC) motors, including:
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- How to calculate torque, speed, induced emf, and other parameters for DC motors.
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This project report describes a circuit designed to control the speed of a DC motor. The circuit uses two transistors in a Darlington pair configuration with a potentiometer connected to the base of the first transistor. This allows varying the motor speed by adjusting the potentiometer resistance. A diode is also included to prevent reverse current flow in the motor. The report provides details on the circuit components, working principle of DC motors, applications of DC motors like fans and pumps, and problems faced in the project implementation.
Dc Motor Construction and Working
1. DC motors have a stationary stator that contains electromagnets and a rotating armature.
2. When DC current passes through the electromagnets, it creates a magnetic field that interacts with the magnetic field of the armature coils, producing rotational force.
3. The commutator and brushes ensure that the direction of current in each armature coil remains constant, causing continuous rotation of the armature as each coil's magnetic field switches poles.
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1) A DC motor works by applying a magnetic field to a coil attached to a rotor. When current flows through the coil, it experiences an electromagnetic force that causes it to rotate.
2) As the coil rotates, commutator rings switch the direction of current to ensure the torque always acts in the same direction, causing continuous rotation.
3) For smoother rotation, practical DC motors have multiple coils around the rotor connected to separate commutators. This keeps a magnetic force present at all times during rotation.
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1) A DC generator operates on the principle of electromagnetic induction to convert mechanical energy into electrical energy.
2) It uses Faraday's law - whenever a conductor moves through a magnetic field, an electromotive force (EMF) is induced in the conductor.
3) The direction of the induced EMF is determined by Fleming's right-hand rule.
Dc motor
This document discusses the working principles and speed control of DC motors. It describes the different types of DC motors including shunt wound, series wound, and compound wound motors. It explains that a DC motor converts direct current into mechanical energy using a current-carrying armature placed in a magnetic field. The document also discusses speed regulation in DC motors and how speed can be controlled, noting that speed is proportional to the applied voltage and inversely proportional to the armature resistance and current.
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The document discusses DC motors. It defines a DC motor as a machine that converts DC power into mechanical energy. It explains that DC motors operate by generating a magnetic field from coils of wire inside the motor that interacts with a static magnetic field from permanent magnets, causing the shaft to rotate. The document outlines the main types of DC motors - shunt, series, and compound - and provides examples of their applications. It notes advantages like high starting torque and speed control, and disadvantages such as higher costs.
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This document discusses DC motors, including their basic parts and working principles. A DC motor converts electrical energy to mechanical energy using electromagnetic principles. It consists of a rotor and stator, with the rotor containing windings that spin when current is passed through in the presence of a magnetic field. The document compares DC motors to generators and lists different types of motors, explaining the basic operation of a simple DC motor.
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This document provides information about direct current (DC) motors, including:
- The three main types of DC motors: shunt wound, series wound, and separately excited and their characteristics.
- The principles of operation, construction, and torque-speed characteristics of DC motors.
- How to calculate torque, speed, induced emf, and other parameters for DC motors.
- Applications of the different DC motor types.
- Circuit diagrams and equations for analyzing DC motor performance.
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This project report describes a circuit designed to control the speed of a DC motor. The circuit uses two transistors in a Darlington pair configuration with a potentiometer connected to the base of the first transistor. This allows varying the motor speed by adjusting the potentiometer resistance. A diode is also included to prevent reverse current flow in the motor. The report provides details on the circuit components, working principle of DC motors, applications of DC motors like fans and pumps, and problems faced in the project implementation.
Dc Motor Construction and Working
1. DC motors have a stationary stator that contains electromagnets and a rotating armature.
2. When DC current passes through the electromagnets, it creates a magnetic field that interacts with the magnetic field of the armature coils, producing rotational force.
3. The commutator and brushes ensure that the direction of current in each armature coil remains constant, causing continuous rotation of the armature as each coil's magnetic field switches poles.
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1) A DC motor works by applying a magnetic field to a coil attached to a rotor. When current flows through the coil, it experiences an electromagnetic force that causes it to rotate.
2) As the coil rotates, commutator rings switch the direction of current to ensure the torque always acts in the same direction, causing continuous rotation.
3) For smoother rotation, practical DC motors have multiple coils around the rotor connected to separate commutators. This keeps a magnetic force present at all times during rotation.
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1) A DC generator operates on the principle of electromagnetic induction to convert mechanical energy into electrical energy.
2) It uses Faraday's law - whenever a conductor moves through a magnetic field, an electromotive force (EMF) is induced in the conductor.
3) The direction of the induced EMF is determined by Fleming's right-hand rule.
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This document discusses the working principles and speed control of DC motors. It describes the different types of DC motors including shunt wound, series wound, and compound wound motors. It explains that a DC motor converts direct current into mechanical energy using a current-carrying armature placed in a magnetic field. The document also discusses speed regulation in DC motors and how speed can be controlled, noting that speed is proportional to the applied voltage and inversely proportional to the armature resistance and current.
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1. The document discusses DC machines and their components. It describes how a DC machine contains a stator and rotor.
2. The commutator is described as a mechanical rectifier that converts the alternating voltage generated in the armature winding into direct voltage across the brushes.
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Electrostatic generators produce high voltages but have low power ratings and are not used commercially. Electromagnetic generators convert mechanical energy to electrical energy using the principle of electromagnetic induction. The basic parts of a generator are the magnetic frame, pole cores and shoes, field coils, armature core, armature winding, commutator, and brushes. As the armature rotates in the magnetic field created by the poles, a voltage is induced in the armature coils. The commutator and brushes direct the current produced to the external circuit. Synchronous generators use a rotating magnetic field to induce current, while asynchronous generators operate slightly slower than the grid frequency.
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1. A DC motor runs on direct current electricity. It has a field winding that produces a magnetic field when energized, and an armature winding that rotates when placed in this magnetic field.
2. The key parts of a DC motor include the yoke, poles, field winding, armature core, armature winding, commutator, and brushes. The field winding produces flux, and the rotation of the armature winding within this flux induces voltage that is used to power the load.
3. DC motors can be shunt wound, series wound, or compound wound depending on how the field and armature windings are connected. Shunt and series motors have different torque-speed characteristics due
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The document discusses DC compound motors. A DC compound motor combines features of series and shunt motors by having both a series field winding connected in series with the armature and a shunt field winding connected in parallel. This allows the motor to have the high starting torque of a series motor and the regulated speed of a shunt motor. There are two main types - long shunt and short shunt - depending on how the shunt winding is connected. Compound motors can also be cumulative, where the magnetic fields reinforce each other, or differential, where they oppose each other. Cumulative compound motors are widely used industrial applications like elevators that require both high starting torque and speed regulation.
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DC motors convert electrical energy into mechanical energy. There are two main types - AC and DC. A DC motor has a stationary magnetic field and an armature that rotates. The interaction between the magnetic field and current in the armature causes it to rotate. DC motors are classified as shunt, series, or compound based on how the field and armature circuits are connected. Shunt motors are constant speed, series motors have high starting torque but variable speed, and compound motors have characteristics of both.
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The document discusses the basics of DC motors and generators. It covers topics like:
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The document summarizes key aspects of DC machines, including:
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The document discusses direct current (DC) machines, including their basic components and operating principles. It describes how a DC motor works using Fleming's left hand rule to explain how a magnetic field and current produce motion. It also explains how a DC generator works using Fleming's right hand rule to show how motion in a magnetic field produces induced voltage. The document covers topics such as armature windings, commutation, torque and voltage equations, and the characteristics of separately excited, shunt, and series DC machines.
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DC machines can operate from a DC source and either generate mechanical energy (DC generator) or convert mechanical energy to DC electricity (DC motor). A DC machine consists of a yoke, poles, field winding, armature core and winding, and commutator. In a DC motor, current flowing through the armature winding inside the magnetic field generated by the field winding experiences a rotational force, causing the armature to rotate. DC machines can be separately excited, self-excited, or series/compound excited. Common applications include DC motors used in industrial equipment and vehicles.
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This document provides an overview of DC motors, including their construction, principle of operation, types (series wound, shunt wound, compound wound), speed control methods, and applications in aircraft. The key points are:
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1. The document discusses DC machines and their components. It describes how a DC machine contains a stator and rotor.
2. The commutator is described as a mechanical rectifier that converts the alternating voltage generated in the armature winding into direct voltage across the brushes.
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The document discusses the basics of DC motors and generators. It covers topics like:
- The operating principles of DC machines and how they work as motors and generators.
- Fleming's left and right hand rules for determining the direction of motion, induced voltage, and magnetic fields.
- Components of DC machines like the armature, field coils, commutators, and different winding configurations.
- How voltage, current, torque, speed and power are related in DC motors and generators based on the magnetic flux and field excitation.
- Different types of DC machines like separately excited, shunt, series and compound motors/generators.
- Speed control methods and torque-speed characteristics of DC
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The document summarizes key aspects of DC machines, including:
1) DC machines convert mechanical energy to DC electric energy (generators) or convert DC electric energy to mechanical energy (motors).
2) They contain a commutator that converts internally generated AC to DC at the terminals.
3) Construction includes a yoke, poles, field windings, armature, commutator, and brushes.
4) Armature reaction distorts the magnetic field and weakens it as load increases. Commutation reverses current in coils as they pass the magnetic neutral axis.
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The document discusses direct current (DC) machines, including their basic components and operating principles. It describes how a DC motor works using Fleming's left hand rule to explain how a magnetic field and current produce motion. It also explains how a DC generator works using Fleming's right hand rule to show how motion in a magnetic field produces induced voltage. The document covers topics such as armature windings, commutation, torque and voltage equations, and the characteristics of separately excited, shunt, and series DC machines.
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2. How back electromotive force (EMF) regulates motor speed as the armature rotates in the magnetic field.
3. Equations for motor voltage, torque, speed, and characteristics like torque-current curves for series, shunt, and compound motors.
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This document provides an overview of DC machines and motors. It discusses:
1) The fundamentals of DC generators and motors, including how voltage is induced in a conductor moving through a magnetic field and how a force is induced on a current-carrying conductor in a magnetic field.
2) The construction of DC machines, including the stationary stator with field poles and rotating armature/rotor with windings.
3) Different types of DC motors like shunt, series, and compound motors and how their field and armature windings are connected. Speed control methods for DC motors are also discussed.
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This document provides an overview of direct current (DC) machines. It discusses the construction and operating principles of DC generators and DC motors. The key components of a DC machine include the armature, commutator, and field windings. The armature rotates within the magnetic field produced by the field windings to generate an alternating current, which the commutator converts to direct current by reversing the electrical connections at the proper times. DC generators are used to convert mechanical energy to electrical energy, while DC motors operate in reverse to convert electrical energy to mechanical motion.
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1) The document discusses the fundamentals of DC machinery, including the simplest DC machine consisting of a single rotating loop of wire. It describes how a voltage is induced in the loop due to rotation in a magnetic field and how a commutator can be used to produce DC voltage and current from the alternating voltage in the loop.
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DC machines can operate from a DC source and either generate mechanical energy (DC generator) or convert mechanical energy to DC electricity (DC motor). A DC machine consists of a yoke, poles, field winding, armature core and winding, and commutator. In a DC motor, current flowing through the armature winding inside the magnetic field generated by the field winding experiences a rotational force, causing the armature to rotate. DC machines can be separately excited, self-excited, or series/compound excited. Common applications include DC motors used in industrial equipment and vehicles.
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DC motor is an electro-mechanical energy conversion device which convert electrical energy to mechanical energy.
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An electric motor converts electrical energy to mechanical energy using a loop of current-carrying wire that spins continuously within a magnetic field. It contains a stationary electromagnet called a field magnet that provides a magnetic field, a rotating electromagnet called an armature, and a commutator connected to the armature that reverses electric current to keep the armature spinning. As the unlike poles of the armature and field magnet repel each other, the armature rotates, powering an output shaft to do work.
electromagnetism
This document provides information on learning outcomes, misconceptions, and a brief history of magnetism and electromagnetism. The key learning outcomes are to describe the behavior of permanent magnets and how magnetic fields arise from moving charges. The brief history section outlines important discoveries and developments in electromagnetism from 1600 to the 1860s, including Oersted's discovery relating electricity and magnetism. Misconceptions discussed include that all metals are magnetic and that static charges interact with magnet poles.
What is an electric motor.pptx
An electric motor converts electrical energy into mechanical energy. It works through electromagnetic principles - when electricity passes through a coil wrapped around an axle, it creates a magnetic field that causes the axle to rotate. The main parts of an electric motor are the rotor (coil wrapped axle), stator (magnets providing a magnetic field), and commutator (reverses current to ensure consistent rotation). Electric motors are widely used to power devices from appliances to vehicles.
Motor and generators
Electric motors and generators both use the principle of electromagnetic induction to convert between electrical and mechanical energy. Electric motors convert electrical energy into mechanical motion by using a rotating electromagnet within a magnetic field, while electric generators convert mechanical energy into electrical current by rotating a coil of wire within a magnetic field. The key components needed for both are an electrical coil, a magnetic field, and a way to transfer the induced current such as slip rings or a commutator.
Direct current motors slides with numerical
A DC motor converts electrical energy into mechanical energy using a magnetic field and electricity to produce torque. It consists of a stator, armature, rotor, and commutator with brushes. Opposite magnetic fields inside the motor cause the rotor to turn, producing rotational motion. DC motors are commonly used in appliances and vehicles.
Salman salu electrical
The document discusses DC motors, DC generators, AC motors, and AC generators.
1. A DC motor converts direct current into mechanical energy using the Lorentz force principle. It has an armature and stator. A DC generator converts mechanical energy into direct current using electromagnetic induction.
2. The key differences between AC and DC machines are that AC motors have rotating magnetic fields and multiple phases while DC motors have a rotating armature. AC generators have fixed coils and rotating magnets, making construction simpler, while DC generators have commutators.
3. The document provides definitions, construction details, working principles, and comparison of the different motor and generator types.
DC MOTORS.ppt
A DC motor converts direct current (DC) electrical power into mechanical power. It consists of a yoke that provides structural support, poles with field windings that generate a magnetic field, an armature winding on a core that rotates in the magnetic field, a commutator that converts the alternating current from the armature to direct current, and brushes that conduct current to and from the commutator. When current flows through the field windings, it produces north and south poles. The interaction between the magnetic field and current in the armature winding according to Fleming's left-hand rule produces a torque that rotates the shaft. There are different types of DC motors including shunt, series, and compound motors that
The electric motor
A presentation done for part of my A-level studies, and also for my personal interest too.
Some materials are 'shamefully' from the Internet, so please message me if you find that your copyright is seriously infringed.
ELECTRIC MOTOR.pptx
The document discusses electric motors, including their construction, working principles, and types. It describes how electric motors convert electrical energy to mechanical energy using electromagnetic phenomena. The key components of an electric motor are identified as the rotor, stator, air gap, windings, and commutator. The working principle involves the interaction of current-carrying conductors and a magnetic field to generate torque that rotates the shaft. The two main types are AC motors, which are driven by alternating current, and DC motors, which use direct current to power the movement of a rotor within a magnetic field and convert it to rotational motion.
Motor and generators
The document discusses electric motors and generators. It explains that moving a metal wire through a magnetic field can generate electrical current. Both AC and DC electricity can be produced this way. Electric motors convert electrical energy into mechanical motion by using an electromagnet rotating within a magnetic field, while generators convert mechanical energy into electrical energy using the same principle in reverse. The key components of motors and generators are coils, magnetic fields, and commutators or slip rings to regulate current flow.
Dc & ac motors
DC and AC motors convert electrical energy to mechanical energy through electromagnetic interaction between a magnetic field and electric current. DC motors use direct current and have commutators, while AC motors use alternating current and have either induction or synchronous designs. Induction motors generate torque through electromagnetic induction, and synchronous motors synchronize the rotor speed to the supply frequency to maintain a constant speed under varying loads. Both motor types have various applications depending on their torque, speed, and load characteristics.
Tatasteelppt.pptx
BLDC motors work by using electrical commutation rather than brushes and commutators to power the rotor. In a BLDC motor, permanent magnets are attached to the rotor while current-carrying armature windings are located on the static stator. When power is applied to the stator windings, it creates a rotating magnetic field that causes the rotor to turn. BLDC motors have advantages over brushed DC motors like higher efficiency, longer lifetime, less noise, and no brush maintenance. However, BLDC motors require more complex electronic speed controllers. Common applications of BLDC motors include electric vehicles, industrial robots, appliances, and computer cooling fans.
20ME702– MECHATRONICS -UNIT-5-Motor.ppt
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.
MECHATRONICS Unit-5-Motor.ppt
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.
Unit 5-ACTUATORS AND MECHATRONIC SYSTEM DESIGN-ME6702– MECHATRONICS
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.
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Unit 5-ACTUATORS AND MECHATRONIC SYSTEM DESIGN-ME6702– MECHATRONICS
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ppt on dc motor
- 3. •Design is based on the construction of brush DC Motor. • There are permanent magnets on the outside and a spinning armature on the inside •When electricity is put into this electromagnet, it creates a magnetic field in the armature that attracts and repels the magnets in the stator. •The armature will spin.
- 4. DC motor is an electric motor that runs on direct current (DC) electricity. Two types of DC motor - brush and brushless DC Motor. Brushed DC electric motor generates torque directly from DC power supplied to the motor by using internal commutation, stationary magnets (permanent or electromagnets), and rotating electrical magnets. Brushless DC motors use a rotating permanent magnet or soft magnetic core in the rotor, and stationary electrical magnets on the motor housing
- 6. 1. When the coil is powered, a magnetic field is generated around the armature. The left side of the armature is pushed away from the left magnet and drawn toward the right, causing rotation. 2. The armature continues to rotate. 3. When the armature becomes horizontally aligned, the commutator reverses the direction of current through the coil, reversing the magnetic field. 4. The process then repeats.
- 7. OVER ALL ADVANTAGES 1. Provide excellent speed control for acceleration and de-acceleration. 2.Easy to understand design 3.Simple, cheap drive design
- 8. High maintenance **care required to maintain the mechanical interface used to get current to the rotating field. ** maintenance includes the commutator (the collection of copper and mica segments attached to the rotor winding over which the brushes pass), and the brushes themselves. Not suitable in very clean environment. **vulnerable to dust which decreases performance.