Calculation of Additional Losses Caused by Feeding an Induction Motor from a Non-Sinusoidal Supply

1995 ◽  
Vol 32 (1) ◽  
pp. 51-62
Author(s):  
S. A. Eldhemy ◽  
A. A. Mohamed ◽  
S. S. Shokralla
Keyword(s):  
Numerical Methods ◽  
Equivalent Circuit ◽  
Induction Motor ◽  
Induction Motors ◽  
Test Results ◽  
Additional Losses ◽  
Theoretical Results

Calculation of additional losses caused by feeding an induction motor from a non-sinusoidal supply The authors present an equivalent circuit for induction motors fed from a non-sinusoidal supply, The equivalent circuit presented takes into consideration the effect of stray fields. The validity of the theoretical results is checked by test results. The paper presents numerical methods to compute the different loss elements.

scholarly journals DVR and D-STATCOM Mitigation Techniques of Power Quality Effects on Induction Motors

2017 ◽  
Vol 2 (2) ◽  
pp. 110-129
Author(s):  
Fatma Zohra DEKHANDJI ◽  
Mohamed DOUCHE ◽  
Nacer ZEBIDI
Keyword(s):  
Induction Motor ◽  
Power Quality ◽  
Induction Motors ◽  
Slight Variation ◽  
Voltage Amplitude ◽  
Rotor Vibration ◽  
Substantial Cost ◽  
Mitigation Techniques ◽  
Power Quality Disturbances ◽  
Additional Losses

Power quality disturbances have always been a major concern among engineers. Any slight variation in voltage amplitude or frequency can cause customer equipment to fail, at a substantial cost in time and money.In this project we will use some mitigation techniques to protect the induction motor from excessive temperature (additional losses and high currents) and the rotor vibration torque pulsation caused by power quality disturbances.These mitigation techniques reduce the effects of the power quality disturbances on the induction motor, where the simulations done using MATLAB/SIMULINK.

scholarly journals New Spectral Markers for Broken Bars Diagnostics in Induction Motors

Machines ◽  
2020 ◽  
Vol 8 (1) ◽  
pp. 6 ◽  
Author(s):  
Georgii D. Baranov ◽  
Erivelton G. Nepomuceno ◽  
Michail A. Vaganov ◽  
Valerii Y. Ostrovskii ◽  
Denis N. Butusov
Keyword(s):  
Induction Motor ◽  
Induction Motors ◽  
Simulation Analysis ◽  
Real Life ◽  
Motor Current ◽  
Deterioration Process ◽  
Motor Current Signature Analysis ◽  
The Given ◽  
Current Signature ◽  
Theoretical Results

The paper discusses the spectral markers of fault rotor bars in induction motor current signature analysis (MCSA). The results of the simulation of the deterioration process for a single rotor bar, as well as the results of research for various mutual bracing of two broken bars, are reported. We proposed a simple empiric technique allowing one to obtain frequencies for spectrum markers of damaged rotor bars based on simulation analysis. The set of frequencies obtained in the experimental part of the study was compared with simulation results and the results of real-life measurements. The theoretical results were verified through the experiment with the real induction motor under load. Analysis of experimental results proved that the given algorithm for spectrum analysis is suitable for early detection of fault rotor bars in induction motors.

Operation of the induction motor in non-sinusoidal voltage supply conditions

2020 ◽  
Vol 8 (1) ◽  
pp. 13-20
Author(s):  
Tomasz Drabek ◽  
Krzysztof Krzyściak
Keyword(s):  
Induction Motor ◽  
Theoretical Basis ◽  
Induction Motors ◽  
Load Capacity ◽  
Mathematical Expression ◽  
Test Results ◽  
Sinusoidal Voltage ◽  
Torque Load ◽  
American Standard ◽  
Measurement Verification

The paper presents the theoretical basis of the mathematical expression derived from the American standard, used to determine the thermally permissible torque load capacity of the cage induction motors when supplied with distorted voltages. The results of the measurement verification of this expression for different voltage shapes supplying the tested motor are presented. The test results confirmed the correctness of the expression when the motor is supplied with distorted voltage with a limited number of higher harmonics.

scholarly journals Parameters Identification for Three Groups of Squirrel Induction Motor

2021 ◽  
pp. 1-7
Author(s):  
Mervet A Shanab
Keyword(s):  
Equivalent Circuit ◽  
Induction Motor ◽  
Induction Motors ◽  
Parameters Identification ◽  
Performance Characteristics ◽  
Full Load ◽  
Squirrel Cage ◽  
Three Phase ◽  
Total Product

This paper presents a developed method to calculate the parameters for thirty-three squirrel cage induction motors operating at three-phase ac voltage of 380 volts. These motors are the total product of an Egyptian factory holding a license from SIEMENS international company to fabricate all parts of these motors. The parameters of all mentioned motors are computed based on the proposed method. Then, the performance characteristics of these motors are investigated at full-load using the conventional equivalent circuit in order to validate the proposed method. The obtained curves achieve significant convergence with the full-load values provided by the data sheets of investigated motors. This confirms the validity of the proposed method.

scholarly journals The Analysis Of 3 Phase 1 HP Induction Motor Efficiency In Under Voltage And Over Voltage Condition With PSIM Simulation

2020 ◽  
Vol 1 (2) ◽  
Author(s):  
Sohih Ajie Prabowo ◽  
Wakhyu Dwiono ◽  
Arif Johar Taufiq
Keyword(s):  
Induction Motor ◽  
Induction Motors ◽  
Phase 1 ◽  
Input Power ◽  
Test Results ◽  
Motor Efficiency ◽  
Three Phase ◽  
Core Losses ◽  
Loss Method

Three phase induction is the most common motor and is widely used in various industrial equipment because of all the advantages. To get the best performance, the quality of powersupply of induction motors needs to be maintained. One of the problems that arise in power quality is under voltage or over voltage. In this study the calculation and analysis of efficiency using the segregated loss method of 3 phase induction motors connected to stars and delta on the under voltage and over voltage conditions of the rating voltage, and at the rating voltage, the motor used is a 3 Phase 1 HP 4 pole induction motor with voltage rating of 380 volts. The method used is the segregated loss method, this method is a method to get the value of the efficiency of the induction motor by finding and separating the value of loss and loss, the method used refers to IEEE 112. Simulation using PSIM software as a hypothesis and comparison, variables taken are speed, current, inter-phase voltage and input power. Based on the results of calculations from all experiments show that the induction motor will produce better efficiency at loads approaching its capacity, and under voltage and over voltage conditions affect the efficiency value with a small difference in each change in voltage conditions. Efficiency values in all star motor voltage conditions range between 44% - 52% and in delta connection motor ranges between 39% - 42%. Simulations carried out using PSIM software produce higher efficiency than the test results with a range of values of 67% -78%, where the value is calculated from the simulation results and ignoring core losses.

scholarly journals Eddy Currents Based Stray Loss Model For Variable Load Conditions of Medium Power Induction Motors

2021 ◽  
Author(s):  
Rajendra Kumar ◽  
Praveen Kumar ◽  
Teruo Kanekawa ◽  
Koji Oishi
Keyword(s):  
Magnetic Field ◽  
Induction Motor ◽  
Eddy Currents ◽  
Induction Motors ◽  
Variable Load ◽  
Test Results ◽  
Loss Model ◽  
Development And Validation ◽  
The Impact ◽  
The Magnetic Field

<div>This paper presents an eddy current based stray loss model for induction motors taking into account the impact of motor’s loading. The model uses the various motor inductances and, other nameplate data of an induction motor as primary variables. The Magnetic field distribution in a motor is prominently affected by the stator and rotor slot geometries. Distortions in the magnetic field have a direct impact on SL as well as on various inductances of the motor. The development and validation of the model is accomplished by testing total 26 numbers of induction motors of different geometries and materials at different loading conditions. In a further step, the applicability of the model in designing an IM is presented by re-designing a 75kW induction motor and comparing the experimental test results with the initial IM.</div>

Design and Construction of a Mini Magnetic Levitation Train

2019 ◽  
Vol 891 ◽  
pp. 253-262
Author(s):  
Sakhon Woothipatanapan ◽  
Poonsri Wannakarn
Keyword(s):  
Induction Motor ◽  
Induction Motors ◽  
Magnetic Levitation ◽  
The Body ◽  
Test Results ◽  
Linear Induction ◽  
Linear Induction Motor ◽  
Drive Speed ◽  
The Magnetic Field ◽  
Design And Construction

This article presents the design and construction of a mini magnetic levitation train. The design of the train is based on the theory of 3-phase Linear Induction Motor (LIM). The train consists of two main sections. The first part is the linear induction motor, which is the part that drives the train to move. The second part is the magnetic field winding, which is the part that raises the body of the train to float over the rails. Such train can move forward/backward in the same principle as forward/reverse rotation control of 3-phase induction motors. For that reason, this research controls the forward/backward movement of the train with a magnetic contactor set by using the same circuit as the control of the rotation of the 3-phase induction motor. The designed train can lift 1 mm above the rails and move within a distance of 1.48 m along the length of the rails. The test results showed drive voltage, drive force, average time and drive speed of the train. From the details and results of this article can be used as a guide to create a larger magnetic levitation train, which can be used more effectively.

The Analysis of Inverter-Fed Induction Motors

1976 ◽  
Vol 13 (4) ◽  
pp. 359-369 ◽  
Author(s):  
Johnm. D. Murphy
Keyword(s):  
Equivalent Circuit ◽  
Induction Motor ◽  
Induction Motors ◽  
Electrical Machines ◽  
Transient Conditions ◽  
Motor Operation

Induction motor operation with a six-step inverter supply is analysed in a manner suitable for existing courses in electrical machines. Steady harmonic torques and harmonic losses are examined by the equivalent circuit approach. The two-axis model is used to determine instantaneous torque and current waveforms and to study transient conditions.

scholarly journals A new exact equivalent circuit of the medium voltage three-phase induction motor

2020 ◽  
Vol 10 (6) ◽  
pp. 6164
Author(s):  
Laura Collazo Solar ◽  
Angel A. Costa Montiel ◽  
Miriam Vilaragut Llanes ◽  
Vladimir Sousa Santos ◽  
Abel Curbelo Colina
Keyword(s):  
Equivalent Circuit ◽  
Induction Motors ◽  
Complete Information ◽  
Power Balance ◽  
Power Losses ◽  
Joule Effect ◽  
Medium Voltage ◽  
Three Phase ◽  
Additional Losses

This paper proposes a new equivalent circuit for medium voltage and great power induction motors considering the more complete information given by the manufacturer. A methodology for obtaining the parameters of the equivalent circuit is presented, having this circuit the advantage of allowing the electrical calculation of all the power losses and the realization of the power balance. It is an achievement of this work a new way of calculating and representing the additional losses using a resistance located in the rotor circuit. Then, three types of losses are considered as a part of a power balance: the conventional or joule effect variable losses, the constant losses, and the additional losses. The proposed method is straight and non-iterative. It was applied to a case study motor of 6000 V and 2500 kW located at the Maximo Gomez Power Plant in Cuba.

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