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A fundamental study of motors with transformer function
Author(s) -
Kaido Chikara
Publication year - 1997
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/(sici)1520-6416(19971115)121:2<8::aid-eej2>3.0.co;2-a
Subject(s) - transformer , rotary variable differential transformer , energy efficient transformer , delta wye transformer , magnetic core , electrical engineering , distribution transformer , induction motor , universal motor , linear variable differential transformer , flyback transformer , electric motor , control theory (sociology) , materials science , ac motor , engineering , computer science , electromagnetic coil , voltage , control (management) , artificial intelligence
In a motor with transformer function (MTF), where a magnetic core is used jointly as a motor core and a transformer core, the interactions between motor and transformer action are investigated in no‐load conditions. If flux densities are not saturated and magnetic circuits are balanced in the magnetic core, the characteristics of motor actions and those of transformer actions are almost independent of each other. In motor actions, torques and iron losses are almost constant at frequencies different from the transformer frequency, although they fluctuate at the same frequency. In transformer actions, exciting currents and iron losses increase although the increases are small at frequencies different from the motor frequency. Thus, an MTF functions almost independently as a motor and a transformer at the same time. © 1997 Scripta Technica, Inc. Electr Eng Jpn, 121(2): 8–15, 1997