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http://dx.doi.org/10.5573/ieek.2013.50.1.254

Study on The Electromagnetism of Interior Permanent Magnet Synchronous Motor due to Field Weakening  

Kwon, Soon-O (Korea Institute of Industrial Technology)
Publication Information
Journal of the Institute of Electronics and Information Engineers / v.50, no.1, 2013 , pp. 254-260 More about this Journal
Abstract
This paper deals with electromagnetic characteristics of IPMSM (Interior Permanent Magnet Synchronous motor) caused by field weakening current control. In order to extend operation speed, field weakening current control is generally used in IPMSM operation. During field weakening, distorted linkage fluxes are resulted by saturation of core material. Therefore, distorted input voltage waveform is required for sinusoidal current input. As the current vector angle increases for field weakening, distortion of linkage flux and back-emf becomes significant. This situation is analyzed by 2-dimensional finite element analysis and verified by experiment. With the results, it is concluded that motor parameters, such as linkage flux by permanent magnet, phase resistance, d-q axis inductance, are insufficient for estimating required voltage for given speed especially in field weakening and additional considerations for increased harmonics of voltage are required.
Keywords
IPMSM; current vector control; field weakening;
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