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Extension of Mathematical Models Taking Temperature Variation in Permanent Magnet Synchronous Motors into Consideration
Author(s) -
NAKATSUGAWA JUNNOSUKE,
IWAJI YOSHITAKA,
ENOMOTO YUJI
Publication year - 2017
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.22957
Subject(s) - variation (astronomy) , extension (predicate logic) , permanent magnet synchronous motor , synchronous motor , magnet , permanent magnet synchronous generator , control theory (sociology) , electrical engineering , mechanical engineering , computer science , engineering , physics , artificial intelligence , control (management) , astrophysics , programming language
SUMMARY We have developed novel mathematical models of d ‐axis and q ‐axis magnetic fluxes ϕ d and ϕ q for permanent magnet synchronous motors (PMSMs). The models can be used to approximate magnetic characteristics using simple fractional equations with i d and i q as variables. They include eight constants, and some of them represent the degree of magnetic saturation and cross‐coupling. However, the magnetic characteristics are varied with the temperature rise in PMSMs, which are dependent on the load torque and motor speed. In this paper, the characteristics of the eight constants that vary with the motor temperature and the residual flux density B r are shown. Further, we propose to extend the mathematical models by considering the temperature and B r variation.