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Calculation of the Characteristics of Salient‐Pole Synchronous Machines Assisted by Permanent Magnets on the Basis of the Operating Principle
Author(s) -
Yamazaki Katsumi,
Tamiya Shuichi,
Shima Kazuo,
Fukami Tadashi
Publication year - 2015
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.22512
Subject(s) - magnet , salient , basis (linear algebra) , finite element method , control theory (sociology) , representation (politics) , magnetic circuit , computer science , pole piece , mechanical engineering , electronic engineering , engineering , mathematics , structural engineering , geometry , artificial intelligence , control (management) , political science , politics , law
SUMMARY In this study we investigate a method for accurately calculating the characteristics of salient‐pole synchronous machines assisted by permanent magnets. First, the operating principle of the machines is investigated by using both finite element analysis and a simple magnetic circuit. Then, a theoretical representation of the assist effect on the permanent magnets is derived based on the magnetic circuit. Finally, the measured and calculated results are compared in order to confirm the validity of the proposed calculation method. We show that the load characteristics of the proposed machine can be accurately estimated from the no‐load and short‐circuit characteristics of the conventional machine without permanent magnets, and the size and magnetization of the inserted permanent magnets.