Investigation Method of Transient Modes in Induction Machines with Rotor Cage Asymmetry

2016 ◽  
pp. 433-451
Author(s):  
Iliya Boguslawsky ◽  
Nikolay Korovkin ◽  
Masashi Hayakawa
Keyword(s):  
Induction Machines ◽  
Investigation Method ◽  
Rotor Cage

scholarly journals Reduced-Order Model of Rotor Cage in Multiphase Induction Machines: Application on the Prediction of Torque Pulsations

2020 ◽  
Vol 25 (1) ◽  
pp. 11 ◽  
Author(s):  
Abdelhak Mekahlia ◽  
Eric Semail ◽  
Franck Scuiller ◽  
Hussein Zahr
Keyword(s):  
Induction Machine ◽  
Induction Machines ◽  
Reduced Order Model ◽  
Order Model ◽  
Two Phase ◽  
Reduced Order ◽  
Three Phase ◽  
Torque Pulsations ◽  
Sinusoidal Current ◽  
Rotor Cage

For three-phase induction machines supplied by sinusoidal current, it is usual to model the n-bar squirrel-cage by an equivalent two-phase circuit. For a multiphase induction machine which can be supplied with different harmonics of current, the reduced-order model of the rotor must be more carefully chosen in order to predict the pulsations of torque. The proposed analysis allows to avoid a wrong design with non-sinusoidal magnetomotive forces. An analytical approach is proposed and confirmed by Finite-Element modelling at first for a three-phase induction machine and secondly for a five-phase induction machine.

Operation of an induction motor supplied by voltage with interharmonics

2018 ◽  
Vol 2 (1) ◽  
pp. 47-53 ◽  
Author(s):  
Tomasz Drabek
Keyword(s):  
Induction Motor ◽  
Fundamental Frequency ◽  
Skin Effect ◽  
Induction Machines ◽  
Positive Sequence ◽  
Rotor Speed ◽  
Negative Sequence ◽  
Three Phase ◽  
Total Multiplicity ◽  
Rotor Cage

The paper discusses the effects of interharmonics, i.e. frequencies higher than the fundamental frequency, not being its total multiplicity, in the voltage supplying the induction motor. The emergence of interharmonics in a three-phase grid is mainly the result of the swinging of peak mains voltages. In induction machines, this results in the occurrence of currents with interharmonic and subharmonic frequencies, the generation of alternating moments, the swinging of the rotor speed and the change in the RMS value of the current of the fundamental frequency. The paper explores these phenomena simulation, taking into account the skin effect of currents in the rotor cage. The research was carried out both for interharmonics with a positive sequence of phases as well as for the negative sequence. The paper is a continuation of work [1].

On-line rotor cage monitoring of inverter-fed induction machines by means of an improved method

1999 ◽  
Vol 14 (5) ◽  
pp. 858-865 ◽  
Author(s):  
R. Wieser ◽  
C. Kral ◽  
F. Pirker ◽  
M. Schagginger
Keyword(s):  
Induction Machines ◽  
Improved Method ◽  
On Line ◽  
Rotor Cage

scholarly journals Induction Motor Fault Diagnosis Based on Zero-Sequence Current Analysis

Energies ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 6528
Author(s):  
Arkadiusz Duda ◽  
Piotr Drozdowski
Keyword(s):  
Fault Diagnosis ◽  
Induction Motor ◽  
Induction Machines ◽  
Magnetic Core ◽  
Stator Winding ◽  
Current Component ◽  
Current Analysis ◽  
Zero Sequence ◽  
Rotor Cage ◽  
Motor Model

This paper presents some considerations regarding the application of the stator zero-sequence current component (ZSC) in the fault detection of cage induction machines, including the effects of magnetic core saturation. Faults such as rotor cage asymmetry and static, dynamic, and mixed eccentricity were considered. The research started by developing a harmonic motor model, which allowed us to obtain a voltage equation for the zero-sequence current component. The equation allowed us to extract formulas of typical frequencies for particular fault types. Next, in order to verify the effectiveness of ZSC in induction motor fault diagnosis, finite element calculations and laboratory tests were carried out for the previously mentioned faults for delta and wye connections with neutral wire stator winding configurations.

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