Abstract: The importance of energy saving in induction motor was emphasized about 15 years ago, in academic area, but the motor manufacturer’s interest is focussed only on maximum benefit. As a customer, it is better to take into account not only the motor price, but also the cost of the used energy during the whole lifetime of the motor. The new requirement to improve the motor efficiency is a serious research subject, which must be about the possibility of loss minimization in the induction motor.
On an average the cost of energy consumed by the motor is nearly 80 – 100 times the initial cost of the initial manufacturing cost of the motor. So the efficiency of motor is of great importance whether during the selection or during the operation. Small increase in motor efficiency can make an overall significant difference in total energy consumption.
The slightly higher initial cost of DCR motors is often misunderstood as a demerit. It is not all true. The increase in initial cost is offset by the energy saving.
This paper presents the comparative analysis of performance of a DCR motor and DAR motor. The method of analysis is based upon testing results. The only change in design is that the Die cast aluminium rotor is replaced by die cast copper rotor. The other design parameters like stator core, winding, air gap length etc are remains same.
Motors with Copper Rotors Can Cost Less to ProduceLeonardo ENERGY
Highlights:
* Copper can improve motor characteristics and efficiency.
* Copper can significantly reduce manufacturing costs even for mass-produced, general-purpose motors.
* Copper motors allowed a reduction in frame size.
* Using copper reduced the cost of lamination steel.
* Motors with copper rotors cost an average of 18% less for a 7.5 hp motor and 14% less for a 15 hp motor.
Introduction to copper rotor induction motorsLeonardo ENERGY
Copper rotors are now being used in different branches of industry, especially for applications where high efficiency is required. Industrial applications include motors for high-speed machining centers, pumps, drills, compressors and fans. Transport applications include asynchronous motors for electric traction, starter-alternators, generators, and electric power-steering.
Presentation economic assessment copper rotorsLeonardo ENERGY
Economic assessment for copper rotor induction motors compared to aluminium rotor technology. For a given efficiency level, copper rotor technology offers a reduced size and weight, that translates into savings in electrical steel and a positive economic case for this technology.
Study carried out by Aquila University
Motors with Copper Rotors Can Cost Less to ProduceLeonardo ENERGY
Highlights:
* Copper can improve motor characteristics and efficiency.
* Copper can significantly reduce manufacturing costs even for mass-produced, general-purpose motors.
* Copper motors allowed a reduction in frame size.
* Using copper reduced the cost of lamination steel.
* Motors with copper rotors cost an average of 18% less for a 7.5 hp motor and 14% less for a 15 hp motor.
Introduction to copper rotor induction motorsLeonardo ENERGY
Copper rotors are now being used in different branches of industry, especially for applications where high efficiency is required. Industrial applications include motors for high-speed machining centers, pumps, drills, compressors and fans. Transport applications include asynchronous motors for electric traction, starter-alternators, generators, and electric power-steering.
Presentation economic assessment copper rotorsLeonardo ENERGY
Economic assessment for copper rotor induction motors compared to aluminium rotor technology. For a given efficiency level, copper rotor technology offers a reduced size and weight, that translates into savings in electrical steel and a positive economic case for this technology.
Study carried out by Aquila University
Design Approach To High Voltage High Power Steam-Turbine Driven AlternatorIJPEDS-IAES
The paper deals with the design methodology of high voltage high power
alternators driven by steam turbines. These alternators run at a high speed of
3000 rpm in most part of the world (at 3600 rpm in USA) and are of
cylindrical pole construction. The design procedure suggested in the textbooks
of design does not well-suit for large alternators of modern time.
Modern high power alternators are designed with a low value of SCR to
reduce the size, inertia and cost of the rotor. The diameter is limited by the
consideration of centrifugal stresses. The no.of stator slots are determined by
the no. of turns. The ventilating circuit has to be designed for hydrogen as
coolant and in addition with water flowing through hollow conductors, if
required. The data for the design variables and the design constraints are
quite different from those for small power ratings. The materials to be chosen
must be of very high quality. The computer programme has been chalked out
and the case-study has been conducted keeping all these points in view.
Dimensional and Constructional Details of Components, Fundamentals of TNM Met...IJERA Editor
For the improvement in thermal design of squirrel cage induction (SCIM) motor, it is essential to know details
of the methods for evaluation of thermal distribution in a SCIM motor. A presentation of various details of
methods of basics of heat transfer that occur in a SCIM motor is done in this report. SCIM motors have wide
applications and thus their construction is completely influenced by the starting characteristics specified by the
operating loads. General constraints of a motor and specification of 30 KW motor are presented in this report as
a case study of constraints. As the next step the Thermal Network Method (TNM) has been explained.
The objective of this project is to design a wind turbine that is optimized for the constraints that come with residential use. The main tasks of this project are:
> To study the design process and methodology of wind turbine
> Derive the Blade Element Momentum (BEM) theory then use it to conduct a parametric study that will determine if the optimized values of blade pitch and chord length create the most efficient blade geometry
> Analyse different air-foils to determine which one creates the most efficient wind turbine blade.
Research Inventy : International Journal of Engineering and Science is published by the group of young academic and industrial researchers with 12 Issues per year. It is an online as well as print version open access journal that provides rapid publication (monthly) of articles in all areas of the subject such as: civil, mechanical, chemical, electronic and computer engineering as well as production and information technology. The Journal welcomes the submission of manuscripts that meet the general criteria of significance and scientific excellence. Papers will be published by rapid process within 20 days after acceptance and peer review process takes only 7 days. All articles published in Research Inventy will be peer-reviewed.
Contractors have many choices in jobsite lighting and auxiliary power, by Don Talend, brand storytelling, content management and demand generation expert. Construction industry
DYNAMIC ANALYSIS OF ENGINE BLOCK FOR SELECTION OF SUITABLE MATERIAL FOR COST ...Ijripublishers Ijri
The Aim of this project is to design a combustion chamber using Pro-E and perform analysis using ANSYS software.
The analysis of the combustion chamber is done by using different materials. By conducting the above analysis on the
combustion chamber combustion rate, pressure and temperature gradient conditions are found and the best material
for the combustion chamber is suggested.
Thermal analysis is conducted to find heat dissipation rate in engine block with the variation of materials Structural
and fatigue analysis(dynamic) is conduct on engine block at working load conditions to evaluate and compare stress,
strain, deformation and fatigue life with the variation of materials.
Frequency analysis is conducted on engine block with the variation of materials to evaluate frequency,
Using these values material selection will be done, the value should be nearby previous one (cast iron) maximum accepted
variation value 65HZ.
Power generation using neodymium magnets in Vertical Axis Wind TurbineSumit Bhattacharya
The objectives of our Experimental Setup are as follows:
Design calculations of rotor axle, bearings and stator coil
CAD design of various components of VAWT, like Hub, Axle, Blade Supports and Spoke Flange
Analysis of Hub in NX-NASTRAN 9.0
Fabrication of individual components of the setup
Assembly of VAWT
Testing of Experimental Setup
Results
GE ADGT (Aeroderivative Gas Turbines) Products
GE코리아 뉴스레터를 구독하세요! http://goo.gl/IE8WS8
GE코리아 YouTube 채널을 구독하세요! http://goo.gl/M2gc8m
상상을 현실로 만듭니다. Imagination at work.
GE가 꿈꾸는 가치입니다. 아니, GE는 단지 꿈만 꾸고 있는 것이 아닙니다. 상상을 현실로 만들기 위해, 불가능했던 것을 가능하게 만들기 위해 쉬지 않고 움직이고 있습니다. GE는 에너지, 의료, 항공, 수송, 금융 등의 여러 분야에서 고객과 인류사회의 진보를 위해 더 편리하고 빠르며 친환경적인 솔루션을 찾아냅니다.
Connect with GE Online:
GE코리아 웹사이트: http://www.ge.com/kr/
GE리포트코리아: http://www.gereports.kr/
GE코리아 페이스북 페이지: hhttps://www.facebook.com/GEKorea
GE코리아 슬라이드쉐어: http://www.slideshare.net/GEKorea
Power Quality Identification Using Wavelet Transform: A Reviewpaperpublications3
Abstract: In this paper we used wavelet transform which is useful in signal processing. Wavelet transform is used for analyze different power quality events. The power quality events like pure sine voltage wave, voltage sag, swell, harmonics, impulse can obtained using wavelet transform. The wavelet algorithm is a useful tool for signal processing. Fourier transform is also used for denoising but limited to stationary signals .For continuous analysis of non-stationary signals wavelet transform is used. The presence of noise can be detected by wavelet methods and analyze the noisy signal. The noisy signal can be denoised using wavelet transform.
RELIABILITY BASED POWER DISTRIBUTION SYSTEMS PLANNING USING CREDIBILITY THEORYpaperpublications3
Abstract: This paper presents an analytical technique for distribution system planning based on reliability evaluation using credibility theory. With the development of economy and society power planning is facing with the influence of much uncertainty, which are mainly power distribution network. Power system especially at the distribution level is prone to failures and disturbances as many devices are responsible for the successful operation of a radial distribution system. We also mention whether the work has been done at the strategic level, i.e. if it concerns the planning of power distribution system based on reliability and uncertainty.
Design Approach To High Voltage High Power Steam-Turbine Driven AlternatorIJPEDS-IAES
The paper deals with the design methodology of high voltage high power
alternators driven by steam turbines. These alternators run at a high speed of
3000 rpm in most part of the world (at 3600 rpm in USA) and are of
cylindrical pole construction. The design procedure suggested in the textbooks
of design does not well-suit for large alternators of modern time.
Modern high power alternators are designed with a low value of SCR to
reduce the size, inertia and cost of the rotor. The diameter is limited by the
consideration of centrifugal stresses. The no.of stator slots are determined by
the no. of turns. The ventilating circuit has to be designed for hydrogen as
coolant and in addition with water flowing through hollow conductors, if
required. The data for the design variables and the design constraints are
quite different from those for small power ratings. The materials to be chosen
must be of very high quality. The computer programme has been chalked out
and the case-study has been conducted keeping all these points in view.
Dimensional and Constructional Details of Components, Fundamentals of TNM Met...IJERA Editor
For the improvement in thermal design of squirrel cage induction (SCIM) motor, it is essential to know details
of the methods for evaluation of thermal distribution in a SCIM motor. A presentation of various details of
methods of basics of heat transfer that occur in a SCIM motor is done in this report. SCIM motors have wide
applications and thus their construction is completely influenced by the starting characteristics specified by the
operating loads. General constraints of a motor and specification of 30 KW motor are presented in this report as
a case study of constraints. As the next step the Thermal Network Method (TNM) has been explained.
The objective of this project is to design a wind turbine that is optimized for the constraints that come with residential use. The main tasks of this project are:
> To study the design process and methodology of wind turbine
> Derive the Blade Element Momentum (BEM) theory then use it to conduct a parametric study that will determine if the optimized values of blade pitch and chord length create the most efficient blade geometry
> Analyse different air-foils to determine which one creates the most efficient wind turbine blade.
Research Inventy : International Journal of Engineering and Science is published by the group of young academic and industrial researchers with 12 Issues per year. It is an online as well as print version open access journal that provides rapid publication (monthly) of articles in all areas of the subject such as: civil, mechanical, chemical, electronic and computer engineering as well as production and information technology. The Journal welcomes the submission of manuscripts that meet the general criteria of significance and scientific excellence. Papers will be published by rapid process within 20 days after acceptance and peer review process takes only 7 days. All articles published in Research Inventy will be peer-reviewed.
Contractors have many choices in jobsite lighting and auxiliary power, by Don Talend, brand storytelling, content management and demand generation expert. Construction industry
DYNAMIC ANALYSIS OF ENGINE BLOCK FOR SELECTION OF SUITABLE MATERIAL FOR COST ...Ijripublishers Ijri
The Aim of this project is to design a combustion chamber using Pro-E and perform analysis using ANSYS software.
The analysis of the combustion chamber is done by using different materials. By conducting the above analysis on the
combustion chamber combustion rate, pressure and temperature gradient conditions are found and the best material
for the combustion chamber is suggested.
Thermal analysis is conducted to find heat dissipation rate in engine block with the variation of materials Structural
and fatigue analysis(dynamic) is conduct on engine block at working load conditions to evaluate and compare stress,
strain, deformation and fatigue life with the variation of materials.
Frequency analysis is conducted on engine block with the variation of materials to evaluate frequency,
Using these values material selection will be done, the value should be nearby previous one (cast iron) maximum accepted
variation value 65HZ.
Power generation using neodymium magnets in Vertical Axis Wind TurbineSumit Bhattacharya
The objectives of our Experimental Setup are as follows:
Design calculations of rotor axle, bearings and stator coil
CAD design of various components of VAWT, like Hub, Axle, Blade Supports and Spoke Flange
Analysis of Hub in NX-NASTRAN 9.0
Fabrication of individual components of the setup
Assembly of VAWT
Testing of Experimental Setup
Results
GE ADGT (Aeroderivative Gas Turbines) Products
GE코리아 뉴스레터를 구독하세요! http://goo.gl/IE8WS8
GE코리아 YouTube 채널을 구독하세요! http://goo.gl/M2gc8m
상상을 현실로 만듭니다. Imagination at work.
GE가 꿈꾸는 가치입니다. 아니, GE는 단지 꿈만 꾸고 있는 것이 아닙니다. 상상을 현실로 만들기 위해, 불가능했던 것을 가능하게 만들기 위해 쉬지 않고 움직이고 있습니다. GE는 에너지, 의료, 항공, 수송, 금융 등의 여러 분야에서 고객과 인류사회의 진보를 위해 더 편리하고 빠르며 친환경적인 솔루션을 찾아냅니다.
Connect with GE Online:
GE코리아 웹사이트: http://www.ge.com/kr/
GE리포트코리아: http://www.gereports.kr/
GE코리아 페이스북 페이지: hhttps://www.facebook.com/GEKorea
GE코리아 슬라이드쉐어: http://www.slideshare.net/GEKorea
Power Quality Identification Using Wavelet Transform: A Reviewpaperpublications3
Abstract: In this paper we used wavelet transform which is useful in signal processing. Wavelet transform is used for analyze different power quality events. The power quality events like pure sine voltage wave, voltage sag, swell, harmonics, impulse can obtained using wavelet transform. The wavelet algorithm is a useful tool for signal processing. Fourier transform is also used for denoising but limited to stationary signals .For continuous analysis of non-stationary signals wavelet transform is used. The presence of noise can be detected by wavelet methods and analyze the noisy signal. The noisy signal can be denoised using wavelet transform.
RELIABILITY BASED POWER DISTRIBUTION SYSTEMS PLANNING USING CREDIBILITY THEORYpaperpublications3
Abstract: This paper presents an analytical technique for distribution system planning based on reliability evaluation using credibility theory. With the development of economy and society power planning is facing with the influence of much uncertainty, which are mainly power distribution network. Power system especially at the distribution level is prone to failures and disturbances as many devices are responsible for the successful operation of a radial distribution system. We also mention whether the work has been done at the strategic level, i.e. if it concerns the planning of power distribution system based on reliability and uncertainty.
Abstract: Traditionally electrical appliances in a home are controlled via switches that regulate the electricity to these devices. As the world gets more and more technologically advanced, we find new technology coming in deeper and deeper into our personal lives even at home. Home automation is becoming more and more popular around the world and is becoming a common practice. The process of home automation works by making everything in the house automatically controlled using technology to control and do the jobs that we would normally do manually. Home automation takes care of a lot of different activities in the house. this project we propose a unique System for Home automation utilizing Dual Tone Multi Frequency (DTMF) that is paired with a wireless module to provide seamless wireless control over many devices in a house. This user console has many keys, each corresponding to the device that needs to be activated. The encoder encodes the user choice and sends via a FM transmitter. The FM receiver receives the modulated signal and demodulates it and the user choice is determined by the DTMF decoder. Based upon this the required appliance is triggered. Dtmf access the control unit, the user should send an authentication code (DTMF) along with their quire/desired function/action to his/her home control system via Global System for Mobile communication (GSM). Upon being properly authenticated, the cell phone-based interface at home (control unit) would relay the commands to a microcontroller that would perform the required function/action, and return a function completion code that would be sent to the source of the original command (user’s cell phone).
Skin Lesion Segmentation Using TDLS Algorithm and Pattern Identificationpaperpublications3
Abstract: The rapid growing rate of Melanoma makes researchers to study in depth about it. It is the most deadliest form of skin cancer. Due to the higher costs for dermatologists, images of skin lesion of the patient are taken and texture-based skin lesion segmentation algorithm is proposed. Different regions belonging to different textures are studied. Finally the image is classified as normal skin or lesion. Different model based pattern classification of the lesion is proposed. We mainly classify the whole pigmented lesion into three possible patterns: globular, reticular, and homogeneous.
A Literature Review on Experimental Study of Power Losses in Transmission Lin...paperpublications3
Abstract: The flexible Ac transmission system (FACTS) controllers can play an important role in the power system security enhancement. However, due to high capital investment, it is necessary to locate these controllers optimally in the power system. FACTS devices can regulate the active and reactive power control as well as adaptive to voltage-magnitude control simultaneously because of their flexibility and fast control characteristics. Placement of these devices in suitable location can lead to control in line flow and maintain bus voltages in desired level and so improve voltage stability margins. In the previous paper three type of FACTS devices used in transmission lines for improvement of voltage profile in the power system. This paper describes the simulation result of flexible Alternative Current Transmission Systems (FACTS) devices used in the disturbed power systems. Out of three types of FACTS device UPFC performances is considered to be best comparatively with respect to each of the three devices.
Abstract: Watermarking is mainly projected for copy right protection, data safeguard, and data thrashing, etc. Nowadays all the communication requires protection. Estimation of video quality has a major role in today’s video distribution, communication control and e-commerce. Consumer fulfillment is achieved by providing good quality. Here the video input is changed into frames and the image set as watermark is embedded into the frames. The embedding process is carried out using DWT, then the embedded frame and other remaining frames are again changed into video file and it is transmitted. At the receiver side watermark image is extracted from the video. Finally, by using metrics such as TDR, PSNR the quality of watermark image is estimated under distortion. All experiments and tests are carried out using MATLAB.
Abstract: This paper is focused on the description of the possible benefits for the electric utilities and residential customers from the Automatic meter reading system usage. Major benefits of the AMR, mentioned in this paper are power quality monitoring, distribution network management, theft detection and so on. The paper also gives the idea about the reliability indices, communication topologies, AT&C losses concept in distribution system, present and last situations of the AMR integration in power utilities.
MODELLING AND IMPLEMENTATION OF AN IMPROVED DSVM SCHEME FOR PMSM DTCpaperpublications3
Abstract: A very widely used drive strategy for PMSM is the field oriented control (FOC), which was proposed in 1971 for induction motors (IMs). However, the FOC scheme is quite complex due to the reference frame transformation and its high dependence upon the motor parameters and speed. To mitigate these problems, a new control strategy for the torque control of induction motor was developed by Takahashi known as the direct torque control (DTC) and by Depenbrock as the direct self control (DSC). The basic direct torque control (DTC) scheme may cause undesired torque, flux and current ripples because of the small number of applicable voltage vectors. The control system should be able to generate any voltage vector, implying the use of space vector modulation (SVM) which complicates the control scheme. The discrete space vector modulation (DSVM) method was proposed for DTC to overcome this problem which replaces the simple switching table by several switching tables, to apply a combination of three voltage vectors in the same sampling period. In this paper, after a brief review of the primary concept of DSVM DTC technique, a new scheme of DSVM DTC for PMSM is proposed with a new set of switching tables taking into account the motor speed and the absolute values of torque and flux feedback errors. In one fixed sampling time interval, three vectors are applied to the motor including the two null vectors. Comparisons of the basic DTC and the improved DSVM DTC schemes are made based on the system performance and switching loss. For this purpose the DSVM technique uses prefixed time intervals within a sampling cycle to synthesize a higher number of voltage vectors than the basic DTC scheme. A set of switching table is carried out to minimize the torque error. An optimal vector selector is developed to reduce the switching loss and make the system more stable. The sampling period does not need to be doubled in order to achieve a mean switching frequency practically equal to that of the basic DTC scheme. For a comparable performance, the switching loss of the proposed scheme is less than that of the basic DTC method. The vector application sequence is investigated and an optimal algorithm is developed to reduce the switching loss and torque ripple. Simulation and experiments on the improved DSVM DTC are carried out and compared with those on the basic DTC scheme.
A Novel Approach for Allocation of Optimal Capacitor and Distributed Generati...paperpublications3
Abstract: Distributed generation (DG) units, based on their interfacing technology are divided into synchronous generator interfaced DGs, asynchronous generator interfaced DGs and inverter interfaced DGs. This paper presents two algorithms for allocation of optimal capacitor and distributed generation on radial distribution system. These algorithms predict requirement of reactive vars and real power and supplied via capacitor banks and distributed generation. This arrangement reduces transmission losses and voltage stability problem. Developed algorithm has been implemented on two IEEE 69 nodes and 52 nodes systems.
A Study On Double Gate Field Effect Transistor For Area And Cost Efficiencypaperpublications3
Abstract: Proposal for a field effect transistor had been presented, with numerical device simulations to verify the title in every manner possible. The two transitional field effect transistors like pMOS and nMOS functions are simultaneously performed, working as one or as the other according to the voltage applied to the gate terminal. Increase in the circuit speed is observed when this technology is implemented on the device suggested with respect to the standard CMOS technology, presented a drastic reduction of number devices and associated parasitic capacitances. In addition to it IC obtained with the proposed device are fully compatible with the standard CMOS technology and the fabrication processes. Fabrication of Static Ram cells with three transistors only with minimum dimensions and a single bit line by saving silicon area and increasing the memory performance with respect to standard CMOS technologies. It is also presented that the fully compatible CMOS process can be used to successfully manufacture the new FET structure.
An Approach for Iris Recognition Based On Singular Value Decomposition and Hi...paperpublications3
Abstract: This paper presents a new approach using Hidden Markov Model as classifier and Singular Values Decomposition (SVD) coefficients as features for iris recognition. As iris is a complex multi-dimensional structure and needs good computing techniques for recognition and it is an integral part of biometrics. Features extracted from a iris are processed and compared with similar irises which exist in database. The recognition of human irises is carried out by comparing characteristics of the iris to those of known individuals. Here seven state Hidden Markov Model (HMM)-based iris recognition system is proposed .A small number of quantized Singular Value Decomposition (SVD) coefficients as features describing blocks of iris images. SVD is a method for transforming correlated variables into a set of uncorrelated ones that better expose the various relationships among the original data item. This makes the system very fast. The proposed approach has been examined on CASIA database. The results show that the proposed method is the fastest one, having good accuracy.
Importance of Antennas for Wireless Communication Devicespaperpublications3
Abstract: The extensive demand for mobile communication and information exchange through wireless devices has lead to major achievements in antenna designing. The purpose of the paper is to give a frame of reference, understanding, and overview of antennas used in wireless communication devices. In this paper we will be discussing various antennas, their advantages and drawbacks. Also a brief framework of comparisons between various antennas is presented on the basis of various parameters. This paper also summarizes the benefits and use of PIFA for USB dongle to cover the Wi MAX bands.
Abstract: Primarily due to the progresses in super resolution imagery, the methods of segment-based image analysis for generating and updating geographical information are becoming more and more important. This work presents a image segmentation based on colour features with K-means clustering. The entire work is divided into two stages. First enhancement of color separation of satellite image using de correlation stretching is carried out and then the regions are grouped into a set of five classes using K-means clustering algorithm. At first, the spatial data is concentrated focused around every pixel, and at that point two separating procedures are added to smother the impact of pseudoedges. What's more, the spatial data weight is built and grouped with k-means bunching, and the regularization quality in every district is controlled by the bunching focus esteem. The exploratory results, on both reenacted and genuine datasets, demonstrate that the proposed methodology can adequately lessen the pseudoedges of the aggregate variety regularization in the level.
Design of Shunt Active Power Filter to eliminate harmonics generated by CFLpaperpublications3
Abstract: The use of non-linear loads; such as TV sets and computer, microwave ovens, multiple low power diode rectifier, fluorescent lamps and electric drives, draw very distorted currents. These non-linear loads lead to generation of current/voltage harmonics and draw reactive power. This paper presents the three-phase shunt active power filter (SAPF) to compensate harmonics generated by non-linear load (compact fluorescent lamp). The instantaneous active and reactive power theory (called p-q theory) is used to design the control of SAPF. The harmonic distortion and the active filter control scheme have been verified by MATLAB simulation.
Design and Implementation of Maximum Power Point Tracking Using Fuzzy Logic C...paperpublications3
Abstract: The maximum power point tracking (MPPT) is a process which tracks maximum power point from array input, varying the ratio between the voltage and current delivered to get the most power it can. This paper proposes Maximum Power Point Tracking (MPPT) of a photovoltaic system using Fuzzy Logic Algorithm. For efficient utilization of solar energy, the PV panel should track the maximum power point (MPP) under various weather conditions. Boost converter increases output voltage of the solar panel and converter output voltage depends upon the duty cycle of the MOSFET present in the boost converter. The change in the duty cycle is done by Fuzzy logic controller by sensing the power output of the solar panel. Fuzzy logic controller (FLC) provides an adaptive nature, fast response, good performance and ability to handle non-linear characteristics. The proposed controller is aimed at adjusting the duty cycle of the DC-DC converter switch to track the maximum power of a solar cell array. MATLAB/SIMULINK is used to develop and design the PV array system equipped with the proposed MPPT controller using fuzzy logic.
SMS Based Automatic Vehicle Accident Information Systempaperpublications3
Abstract: In highly populated Countries like India, during accidents, people lose their lives due to unavailability of proper medical facilities at the right time. This project senses any accident in the vehicle and intimates pre-programmed numbers like the owner of the vehicle, ambulance, police etc. Whenever any accident takes place, the vehicle will experience a huge amount of impulse, this impulse is then been measured with the help of the force sensor which is connected to the vehicle. The impulse that is measured is then converted to electrical voltage unit which helps the microcontroller as it is interfaced with GSM. This change in digital signal will activate the GSM module installed in the vehicle and it will automatically send the saved SMS to the required numbers so that the proper medical aid can be provided to the person.
Performance Comparison of FFT, DHT and DCT Based OFDM Systems with BPSK as A ...paperpublications3
Abstract: Today, OFDM has grown to be the most popular communication system in high-speed communications. OFDM is becoming the chosen modulation technique for wireless communications. OFDM can provide large data rates with sufficient robustness to radio channel impairments. Different type of transform techniques such as Discrete Hartley transform (DHT), Discrete Cosine Transform (DCT), Fast Fourier Transform (FFT) are used to perform the modulation and demodulation operations for the OFDM system. In this paper these three transforms are used in OFDM and study the comparison between these different transforms techniques used in OFDM system based on Bit Error Rate (BER) performances.
Link Disconnection Entropy Disorder in Mobile Adhoc Networkspaperpublications3
Abstract: In Mobile Ad-hoc Networks, nodes move freely causing an interruption in communications. This communication interruption can be accounted in a time lapse to an entropy to connection or disconnection; the combined entropy disorder of a node’s links describe how suitable a node is to communicate to neighbors. This entropy disorder is tightly coupled to mobility and communications factors such as node’s speed or data traffic saturation. In this paper, we analyze the relationship between speed and traffic saturation into a disorder in link entropy with a focus on disconnection, namely Link Disconnection Entropy Disorder (LDED). The findings indicate a high LDED value to nodes with high speed.
Abstract: Energy efficiency in all the aspects of human life has become a major concern, due to significant environment impact as well as it economic importance. Information and Communication Technology (ICT) estimated 2-10% of the global consumption but is also expected to enable global energy efficiency through new technologies tightly dependent on networks. Specially, a network model based on G-network quening theory is built, which can incorporate all the important parameters of power consumption together with traditional performance metric and routing control capability. Our goal is to control both power configuration of pipeline and way to distribute traffic flow among them. Optimization policy having best tradeoff between power consumption and packet latency times. The achieved results demonstrate how the proposed model can effectively represent energy and network-aware performance indexes.
Abstract: In this paper three phase load flow analysis on four bus system using Mi Power software is reformed. As power system never operates under steady state condition therefore single phase load flow analysis doesn’t provide accurate results. Hence three phase load flow analysis which can be performed under different contingencies, provide data when system is unbalanced. The system is analysing on the basis of parameter values in MW & MVAR for transmission line and generator buses. Harmonic values of resistance, reactance, and susceptance can predict the condition of small and large kind of system network. This type of analysis is useful for solving the power flow problem in different power systems which will useful to calculate the unknown parameter.
Study of Optimization of Squirrel Cage Induction Motor Using DCR Technologypaperpublications3
Abstract: Induction motors are versatile electric motors suited best for industrial applications as well as low-power application in domestic equipment because of their unique advantage compared to other types such as dc and synchronous motors. Electric motors do not transfer 100% of the input electrical energy into kinetic mechanical energy. A certain percentage of electrical energy is “lost” during the conversion to mechanical energy. These losses, in motor windings, core and rotating mechanical parts reduces the energy efficiency of motors. In today’s power crisis condition it is very important to manufacture the motors which are more efficient than the standard motors which are already available. The AC induction motor has been continuously improved by optimising stator and rotor design and electric material properties and quantities. With given exterior motor dimensions, the potential efficiency gain is limited and costly. DCR technology is a new development to reduce losses by using copper instead of aluminium for the conductor bars and end rings in rotors to enhance its efficiency and performance. This paper reviews the historical development in squirrel cage rotor designs, importance of energy efficient motors, efficiency improvement, adoption of DCR technology and the optimization of 3- phase squirrel cage induction motor.
Energy efficient motors use less electricity, run cooler, and often last longer than NEMA (National Electrical Manufacturers Association) B motors of the same size.This presentation is on ' ENERGY EFFICIENT INDUCTION MOTOR ' which is mostly use in industries.
Recent technological developments have led to the introduction of very efficient motors, often referred to as Super- and Ultra- Premium Efficiency Motors, with efficiencies well above the IE3 level (mandatory in the USA and in the EU). Cost-effective induction motors (IM) with efficiencies above the IE4 threshold are now widely available on the market and other advanced technologies (Permanent Magnet Motors and Synchronous Reluctance) have enabled manufacturers to produce motors that exceed the IE4 and even meet IE5 thresholds.
This webinar gives an overview of these advanced technologies, their principles of operation, potential efficiency gains, benefits and drawbacks.
An EEM produces the same shaft output power, but uses less input power than a standard efficiency motor.A standard motor is a compromise between efficiency, endurance, starting torque, and initial cost. Standard motor generally competes on price, not efficiency. On the contrary, EEM competes on efficiency, not price.
Computational Design and Analysis of Core Material of Single-Phase Capacitor ...IJERA Editor
A Single-phase induction motor (SPIM) has very crucial role in industrial, domestic and commercial sectors. So, the efficient SPIM is a foremost requirement of today’s market. For efficient motors, many research methodologies and propositions have been given by researchers in past. Various parameters like as stator/rotor slot variation, size and shape of stator/rotor slots, stator/rotor winding configuration, choice of core material etc. have momentous impact on machine design. Core material influences the motor performance to a degree. Magnetic flux linkage and leakage preliminary depends upon the magnetic properties of core material and air gap. The analysis of effects of core material on the magnetic flux distribution and the performance of induction motor is of immense importance to meet out the desirable performance. An increase in the air gap length will result in the air gap performance characteristics deterioration and decrease in air gap length will lead to serious mechanical balancing concern. So possibility of much variation in air gap beyond the limits on both sides is not feasible. For the optimized performance of the induction motor the core material plays a significant role. Using higher magnetic flux density, reduction on a magnetizing reactance and leakage of flux can be achieved. In this thesis work the analysis of single phase induction motor has been carried out with different core materials. The four models have been simulated using Ansys Maxwell 15.0. Higher flux density selection for same machine dimensions result into huge amount of reduction in iron core losses and thereby improve the efficiency. In this paper 2% higher efficiency has been achieved with Steel_1010 as compared to the machine using conventional D23 material. Out of four models result reflected by the machine using steel_1010 and steel_1008 are found to be
Modeling and Simulation of Three Phase Induction Machine Using Written Pole T...IOSRJEEE
Three phase induction motors are employed in almost all the industries because of its simple construction and easy operation. Efficiency of the induction motor is affected by its fixed losses and variable losses which mainly depend on the input supply voltage and load current respectively. An attempt is made to minimize the iron losses by using the permanent magnet ferrite. A new Three Phase Induction Motor Using Written Pole Technology is proposed in this paper in which stator consists of two three phase windings accommodated in the same stator core and rotor is used as squirrel cage rotor with ferrite material on its periphery. Shaft loads are categorized as low, medium and high, Stator coils are energized through a controller based on the load demand. In this study, it is suggested to operate the machine with flat efficiency characteristics, irrespective of shaft load. When compared to conventional induction motor, the motor efficiency and power factor are improved. Another approach of this machine is that the ferrite layer on the rotor periphery will reduce the motor losses which results in improving the motor efficiency. In this motor, one windings (main winding) is designed for the 238 volt ac voltage while the second winding (exciter winding) is designed for 8 volt high frequency ac voltage. Experimental result ensures the considerable increase in the efficiency and power factor. The aim of this paper is to analyze and simulate performance of a 1Hp three phase induction motor using written pole technology using the well known Park’s transformation. A three phase squirrel cage machine is reconfigured and modeled into a two three phase stator winding accommodate in same stator core of the same volume as the three phase machine. Different tests are carried out on the novel machine to determine machine parameters. Simulation results, that predicts the dynamic performance of the machine using ANSYS, at start up are presented and discussed.
Similar to A Comparative Performance Analysis DCR and DAR Squirrel Cage 3-Phase Induction Motor (20)
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
NO1 Uk best vashikaran specialist in delhi vashikaran baba near me online vas...Amil Baba Dawood bangali
Contact with Dawood Bhai Just call on +92322-6382012 and we'll help you. We'll solve all your problems within 12 to 24 hours and with 101% guarantee and with astrology systematic. If you want to take any personal or professional advice then also you can call us on +92322-6382012 , ONLINE LOVE PROBLEM & Other all types of Daily Life Problem's.Then CALL or WHATSAPP us on +92322-6382012 and Get all these problems solutions here by Amil Baba DAWOOD BANGALI
#vashikaranspecialist #astrologer #palmistry #amliyaat #taweez #manpasandshadi #horoscope #spiritual #lovelife #lovespell #marriagespell#aamilbabainpakistan #amilbabainkarachi #powerfullblackmagicspell #kalajadumantarspecialist #realamilbaba #AmilbabainPakistan #astrologerincanada #astrologerindubai #lovespellsmaster #kalajaduspecialist #lovespellsthatwork #aamilbabainlahore#blackmagicformarriage #aamilbaba #kalajadu #kalailam #taweez #wazifaexpert #jadumantar #vashikaranspecialist #astrologer #palmistry #amliyaat #taweez #manpasandshadi #horoscope #spiritual #lovelife #lovespell #marriagespell#aamilbabainpakistan #amilbabainkarachi #powerfullblackmagicspell #kalajadumantarspecialist #realamilbaba #AmilbabainPakistan #astrologerincanada #astrologerindubai #lovespellsmaster #kalajaduspecialist #lovespellsthatwork #aamilbabainlahore #blackmagicforlove #blackmagicformarriage #aamilbaba #kalajadu #kalailam #taweez #wazifaexpert #jadumantar #vashikaranspecialist #astrologer #palmistry #amliyaat #taweez #manpasandshadi #horoscope #spiritual #lovelife #lovespell #marriagespell#aamilbabainpakistan #amilbabainkarachi #powerfullblackmagicspell #kalajadumantarspecialist #realamilbaba #AmilbabainPakistan #astrologerincanada #astrologerindubai #lovespellsmaster #kalajaduspecialist #lovespellsthatwork #aamilbabainlahore #Amilbabainuk #amilbabainspain #amilbabaindubai #Amilbabainnorway #amilbabainkrachi #amilbabainlahore #amilbabaingujranwalan #amilbabainislamabad
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
Event Management System Vb Net Project Report.pdfKamal Acharya
In present era, the scopes of information technology growing with a very fast .We do not see any are untouched from this industry. The scope of information technology has become wider includes: Business and industry. Household Business, Communication, Education, Entertainment, Science, Medicine, Engineering, Distance Learning, Weather Forecasting. Carrier Searching and so on.
My project named “Event Management System” is software that store and maintained all events coordinated in college. It also helpful to print related reports. My project will help to record the events coordinated by faculties with their Name, Event subject, date & details in an efficient & effective ways.
In my system we have to make a system by which a user can record all events coordinated by a particular faculty. In our proposed system some more featured are added which differs it from the existing system such as security.
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
Forklift Classes Overview by Intella PartsIntella Parts
Discover the different forklift classes and their specific applications. Learn how to choose the right forklift for your needs to ensure safety, efficiency, and compliance in your operations.
For more technical information, visit our website https://intellaparts.com
Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
accuracy improvements over previous techniques. The results indicate that the combination of the volumetric
input and curriculum learning holds significant promise for mitigating adversarial attacks without necessitating
adversary training.
Immunizing Image Classifiers Against Localized Adversary Attacks
A Comparative Performance Analysis DCR and DAR Squirrel Cage 3-Phase Induction Motor
1. ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Vol. 2, Issue 3, pp: (77-83), Month: July 2015 - September 2015, Available at: www.paperpublications.org
Page | 77
Paper Publications
A Comparative Performance Analysis DCR
and DAR Squirrel Cage 3-Phase Induction
Motor
1
Ashish Choubey, 2
Rupali Athanere
1
Assistant Professor, 2
M.E. Student (HVPS Engg)
1,2
Deptt of Electrical Engineering JEC Jabalpur (India)
Abstract: The importance of energy saving in induction motor was emphasized about 15 years ago, in academic
area, but the motor manufacturer’s interest is focussed only on maximum benefit. As a customer, it is better to
take into account not only the motor price, but also the cost of the used energy during the whole lifetime of the
motor. The new requirement to improve the motor efficiency is a serious research subject, which must be about
the possibility of loss minimization in the induction motor.
On an average the cost of energy consumed by the motor is nearly 80 – 100 times the initial cost of the initial
manufacturing cost of the motor. So the efficiency of motor is of great importance whether during the selection or
during the operation. Small increase in motor efficiencv can make an overall significant difference in total energy
consumption.
The slightly higher initial cost of DCR motors is often misunderstood as a demerit. It is not all true. The increase in
initial cost is offset by the energy saving.
This paper presents the comparative analysis of performance of a DCR motor and DAR motor . The method of
analysis is based upon testing results. The only change in design is that the Die cast aluminium rotor is replace by
die cast copper rotor. The other design parameters like stator core, winding , air gap length etc are remains same.
Keywords: Induction motor, Squirrel cage rotor, Losses, Premium Efficiency, DCR , DAR, Circle Diagram , No
load test , Blocked rotor test.
1. INTRODUCTION
Three phases Squirrel-cage induction motor finds extensive applications in the industrial field as an electric drive. It has
become quite an attractive drive motor, because of its simple rugged construction, low capital cost and absence of
commutator problems. The power factor and efficiency of these motors are quite high.
The performance given by any machine is said to be good when the machine gives its maximum efficiency under certain
operating conditions with permissible temperature rise, good power factor and low noise level for the same operating
conditions.
The poor performance means the efficiency given by the machine does not match with expectations or it becomes low and
the temperature rise goes beyond permissible limits with poor power factor and high noise level for the same operating
conditions. The reasons of poor performance are the losses in the rotating machine. Efficiency and temperature rise both
depend upon the losses.
The AC induction motor has been continuously improved by optimising stator and rotor design and electric material
properties and quantities. With given exterior motor dimensions, the potential efficiency gain is limited and costly.
2. ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Vol. 2, Issue 3, pp: (77-83), Month: July 2015 - September 2015, Available at: www.paperpublications.org
Page | 78
Paper Publications
DCR technology is a new development to reduce losses by using copper instead of aluminium for the conductor bars and
end rings in rotors to make it more efficient.
2. DAR AND DCR 3-PHASE INDUCTION MOTOR
Die casting is a process involving injecting molten metal at a high pressure into a mold or cavity (called a “die”) in order
to manufacture a part quickly and repeatedly. Typically, die casting is done with low melting temperature metals, given
their typically lower cost of processing. Occasionally, higher melting temperature metals such as ferrous alloys are also
used in die casting, but this is rare given the higher processing costs. Die casting is commonly used in high production
volume applications to manufacture small or medium size parts.
Based on the choice of conducting material for rotor winding and the after development of manufacturing techniques,
following types of Die- cast rotors exist for a squirrel cage induction motor:
1. Aluminium Die Cast Rotor (DAR)
2. Copper Die Cast Rotor (DCR)
Die cast motor rotors were universally produced in aluminium because fabrication by pressure die casting is a well-
established and economical method.
With changing market conditions, users and engineers were looking for the best fit for the application at the most
reasonable cost. As a result they were looking at purchasing motors utilizing aluminium die cast rotors which were in
ratings much greater horsepower than the conventional fabricated aluminium bar rotors.
The previous challenges of die casting copper, which are higher temperatures and pressures compared with die casting
aluminium, have been solved with the development of a die casting process using nickel base alloy die inserts operated at
elevated temperature.
Fig 1. Squirrel cage DAR rotors Fig 2. Squirrel cage DCR rotors
Update recently reported that several motor manufacturers who directly submitted copper for aluminium, saw significant
increase in efficiency in an agricultural irrigation application. Designers can also trade off efficiency, size and power
against each other to optimize motors for given application.
3. ADVANTAGES OF DCR OVER DAR CAGE MOTOR
1. Reduced losses – greater efficiency :
The superior conductivity of copper over aluminium ensures reduction of motor losses by 14 – 23 % and rotor I2
R losses
by 29 – 41%, leading to improvement of the overall efficiency of the motor by at least 2% - 5 %, for the same slot
design.
2. Reduced manufacturing cost :
Due to the higher efficiency of the copper rotor, the overall length of the rotor (and motor) can be decreased, while still
matching the performance of a motor utilizing an aluminium rotor.
3. ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Vol. 2, Issue 3, pp: (77-83), Month: July 2015 - September 2015, Available at: www.paperpublications.org
Page | 79
Paper Publications
3. Reduction in overall motor weight:
Shortening the motor eliminates some of the rotor and stator laminations, decreases the amount of stator windings, and
reduces the length of shaft. By this way, the overall weight reduction of about 20% is expected.
4. Allows better momentary overload:
Compared to aluminium Die cast rotors Copper die cast rotors can withstand higher momentary overloads due to copper‟s
inherent property of lower resistance.
5. Higher torque:
As copper resistivity is lower than aluminium, a copper die cast rotor helps the motor to develop approx. 80% higher
torque compared to aluminium die cast rotors at the same slip.
6. Lower noise level:
Since the motor runs cooler because of reduced losses and low temperature rise, the cooling fan is smaller in size resulting
in lower noise levels.
7. Smoother Operation:
Compared to fabricated copper rotors, Copper die cast rotors offer better dynamic balancing, ensuring smooth operation
of submersible pump
4. TECHNICAL ISSUES IN DCR MOTOR
1. Starting Torque :
The copper motor has the advantage of high torque at running speed and its starting torque is lower than in aluminium
rotor motors. So it is not suitable in the applications where hight starting torque is required.
1. Higher start-up current:
The higher conductivity of copper, i.e. its lower electrical resistance, will result in a slightly higher start-up current .
2. Rotor Inertia :
The higher rotor weight increases rotor inertia. This improves the motor‟s efficiency, but can be a problem in certain
applications – for example motors that frequently switch direction at higher speeds.
5. ENERGY EFFICIENT DCR MOTOR
The various losses encountered in the motor are:
Motor Component Losses Share on Total Loss
Stator copper loss 37 %
Rotor copper loss 18%
Core loss 20%
Friction and Windage loss 9%
Stray loss 16%
Various attempts are made to reduce the above losses in induction motors, primarily to reduce rotor copper loss using
DCR technology Energy – efficient motors, also called premium or high efficiency motors. Motors qualify as „energy
efficient „ if they meet or exceed the efficiency level standards .
In conventional design, the cost of motor increases while attempting to reduce the losses. The task of efficiency
improvement by various methods is illustrated in figure for a 20 H.P. motor.
4. ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Vol. 2, Issue 3, pp: (77-83), Month: July 2015 - September 2015, Available at: www.paperpublications.org
Page | 80
Paper Publications
Fig 3.Improvement in motor efficiency with chaning technology
DCR has helped to achieve efficiencies to meet Eff 1 standards. It gives the confidence that with optimisation of design, it
may be possible to achieve efficiency above Eff 1 level.
The DCR technology increases the efficiency of motor with a normal increase in cost. It is interesting fact that, two – third
(2/3) of electricity generated globally is used to run the motors. It is equal to 2 Trillion (2 x 1012
KWhr/ Year). Out of this,
about 8.5 % of all electricity is consumed to meet the loss in Electric motors.
6. PERFORMANCE ESTIMATION
The equivalent circuit parameters needed for computing the performance of a poly-phase induction motor under load can
be obtained from the results of following tests:
1. no-load test
2. blocked-rotor test
3. measurement of the dc resistance of the stator windings
Performance analysis is done with the help of following two methods:
1. Circle Diagram Analysis
2. Equicalent circuit Analysis
Fig: 4. No load and Blocked rotor circuit
5. ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Vol. 2, Issue 3, pp: (77-83), Month: July 2015 - September 2015, Available at: www.paperpublications.org
Page | 81
Paper Publications
Fig 5. Circle diagram
Fig 6.Induction motor Toque slip characteristic
1. The electromagnetic torque developed by the induction motor:
{( ) ( ) }
Nm
2. .Breakdown or Maximum torque: Nm
3. Breakdown Slip : =
=
Nm
1. Breakdown Slip :
6. ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Vol. 2, Issue 3, pp: (77-83), Month: July 2015 - September 2015, Available at: www.paperpublications.org
Page | 82
Paper Publications
=
7. RESULTS
Motor test results help to find out the equivalent circuit parameters of the motor. Motor analysis can be done using (i)
Circle Diagram method (ii) Equivalent circuit analysis. An experimental and theoretical method helps to find the change
in parameters with change in rotor design technology.
Table 1. No –Load Test Results : 2.2 kW ( 3 HP ), 415 volts , 50 Hz, 2-pole, 3- phase induction motor
Parameters DAR Motor DCR Motor
No load voltage / phase 240 V 240 V
No load current / phase 2 A 1.9 A
No load power 220 W 180 W
Table 2. Blocked Rotor Test Results:2.2 kW ( 3 HP ), 415 volts , 50 Hz, 2-pole, 3- phase induction motor
Parameters DAR Motor DCR Motor
No load voltage / phase 240 V 240 V
No load current / phase 2 A 1.9 A
No load power 220 W 180 W
Table 3.No – load Equivalent Circuit Parameters
Parameters (A) (A) (Ω) (Ω)
DAR Motor 0.305 1.97 2 785.4 121.4
DCR Motor 0.25 1.88 1.9 960 127.4
Table 4.Blocked – Rotor Equivalent Circuit Parameters: Stator winding resistance / phase = 2.73 Ω
Parameters (Ω) (Ω) (Ω) (Ω)
DAR Motor 10.54 6.45 8.33 3.72
DCR Motor 10.59 5.33 9.15 2.6
Table 5. Performance results from equivalent circuit analysis
Full load values DAR MOTOR DCR MOTOR
Voltage (Volts) 415 415
Current (Ampere) 4.63 4.5
Input Power (Watt) 2687 2598
Speed (RPM) 2874 2918
Output power (Watt) 2203 2223
Efficiency (%) 81.87 84.68
Power factor 0.82 0.82
Break down torque 23.94 N-mt 24.93 N-mt
7. ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Vol. 2, Issue 3, pp: (77-83), Month: July 2015 - September 2015, Available at: www.paperpublications.org
Page | 83
Paper Publications
Table 6. Results comparison at full load
Parameters Results DAR motor DCR motor
Rotor copper loss C. D. A 216 watt 168.48 watt
Break-down slip C. D .A 0.43 0.33
Full load
slip
C. D. A .06 .053
E.C. A .042 .027
Full load
power factor
C.D.A 0.83 0.848
E.C.A 0.82 0.82
Full load
Efficiecny
C.D.A 82.5 3 % 87 %
E.C.A 81.87% 84.68%
Break down
Torque
C.D.A 22 N-mt 22.98 N-mt
E.C.A 23.94 N-mt 24.93 N-mt
C.D.A – Circle diagram analysis E.C.A. – Equivalent circuit analysis
8. CONCLUSION
After analysing the performance results, following points can be concluded:
1. Rotor copper losses in DCR rotor as compare to DAR rotor, is less. The % decrease in rotor copper loss (216 –
168.48) / 216 = 22 % .
Reduction in rotor copper loss is due to the reduced rotor resistance of DCR rotor as compare to DAR rotor ( 3.72 – 2.6 ) /
3.72 = 30 %.
2. Breakdown slip in DCR motor is less as compare to DAR motor.
Change in breakdown slip is ( 0.43 – 0.33 ) / 0.43 = 30 % . It shows that a DCR motor can produce maximum torque on
higher speed.
3. Change in full load slip is (.,042 - .027 ) / .042 = 35 % . It means a DCR motor runs at higher speed than DAR motor
when producing the rated output.
4. There is also change in motor power factor at full load from 0.83 to 0.848. So it can be concluded that on producing
the rated power DCR motor draws less current.
5. A significant change in breakdown torque is also there. The % increase in breakdown torque is (22-22.98) / 22 = 4.45
%. DCR motor develops higher maximum torque than DAR motor.
6. The full load efficiency of DCR motor is higher than DAR motor. The % increase in efficiency is (81.87 – 84.86) /
81.86 = 3.4 %.
REFERENCES
[1] Austin H. Bonnett, Timothy Albers: Squirrel-Cage Rotor Options For AC Induction Motors, IEEE Transaction on
industrial application, VOL. 37 NO.4, JULY / AUGUST (2001).
[2] LIE S. –Di PIETRO, C. Copper Die Cast Efficiency improvement and Economic Consideration: IEEE Transaction
on Energy Conservation No. 3 (Sept 1995).
[3] J.B GUPTA: Theory and Performance of Electrical Machines, S.K. Kataria Sons, New Delhi, 2012.
[4] www.copper rotor motor .org.