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ESEARCH OF ELECTROMAGNETIC PROCESSES IN PERMANENT MAGNET SYNCHRONOUS MOTORS BASED ON A "ELECTRIC CIRCUIT - MAGNETIC FIELD" MATHEMATICAL MODEL

 Journal Tekhnichna elektrodynamika Publisher Institute of Electrodynamics National Academy of Science of Ukraine ISSN 1607-7970 (print), 2218-1903 (online) Issue No 2, 2018 (March/April) Pages 47 – 54

Authors
Ju.M. Vaskovskyi,* Ju.A. Haydenko**
National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute",
pr. Peremohy, 37, Kyiv, 03056, Ukraine,
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* ORCID ID : http://orcid.org/0000-0003-1262-0939
** ORCID ID : http://orcid.org/0000-0001-5862-2812

Abstract

In the article methods of mathematical modeling are used to study electromagnetic processes in synchronous machines with permanent magnets. A "electric circuit - magnetic field" mathematical model has been developed, in which the rotor rotation is strictly taken into account, and on the example of a frequency-controlled traction synchronous motor with permanent magnets, the time dependences of its currents and electromagnetic moment for various supply voltage are obtained. It is proved that the assumption of sinusoidal currents in motor windings, which is usually adopted in field mathematical models, leads to significant design errors. It is shown that A "electric circuit - magnetic field" mathematical model, in which the input data is the specified power supply voltage functions, reflect the actual distortion of the stator winding current that occurs even with sinusoidal supply voltage. It is concluded that "electric circuit - magnetic field" mathematical models provide more adequate simulation results and are universal, since they allow simulating electromagnetic processes in electric machines when powered by any non-sinusoidal sources, which is important for AC traction motors that are powered by a converter frequency. References 7, figures 10, table 1.

Key words: synchronous motor, permanent magnet,"electric circuit - magnetic field" mathematical model.

Received:    11.07.2017
Accepted:   30.11.2017
Published:  01.03.2018

References

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2. Vaskovsky Yu.N., Haydenko Yu.A., Rusyatinsky A.E. Modeling the operating modes of the traction synchronous motor with permanent magnets. Electrical engineering &Electromechanics. 2013. No 5. P. 19-22. (Rus)

3. Vaskovsky Yu.N., Haydenko Yu.A., Rusyatinsky A.E. Mathematical modeling and selection of the design parameters of a traction synchronous motor with permanent magnets. Tekhnichna Elektrodynamіka. 2013. No 6. P. 40-45. (Rus)

4. Grebenikov V.V., Priymak M.V. Methods for reducing pulsations of the electromagnetic moment in electric machines with permanent magnets and a tooth-slot stator. Pratsi Instytutu Elektrodynamiky Natsionalnoi Akademii nauk Ukrainy. 2009. Vypusk 27. P. 52-58. (Rus)

5. Bjorn Sjodin, David Kan. Introduction to COMSOL Multiphysics / 1998–2015 COMSOL. 2014. 168 p.

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