Premium
Analysis of characteristics of half‐wave rectified brushless synchronous motor with permanent magnets
Author(s) -
Oyama Jun,
Higuchi Tsuyoshi,
Abe Takashi,
Yamada Eiji
Publication year - 1993
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.4391130310
Subject(s) - synchronous motor , control theory (sociology) , stator , rotor (electric) , ac motor , waveform , wound rotor motor , universal motor , torque , permanent magnet synchronous generator , physics , induction motor , magnet , engineering , electrical engineering , computer science , voltage , control (management) , artificial intelligence , thermodynamics
Previously, the authors proposed a “half‐wave rectified brushless synchronous motor” as a novel servomotor. The rotor winding emf of the motor is induced by the stator current mmf which rotates at synchronous speed and pulsates at bias frequency. The field excitation is produced by the field current obtained from rectifying the emf with a diode inserted into the field winding. To improve the power factor and the efficiency, they also proposed a new‐type half‐wave rectified brushless synchronous motor with permanent magnets. This paper analyzes the flux distribution and the torque characteristics of the new half‐wave rectified brushless synchronous motor using the finite element method. The computed torque characteristics are confirmed with the experimental results. Furthermore, the steady‐state characteristic equations are derived and the effect of the modulation function waveforms on the motor performance is investigated. The theory also is confirmed by the experiments.