永久磁石を併用した半波整流ブラシなし同期電動機の特性解析

抄録

We proposed, in the previous papers, a “half-wave rectified brushless synchronous motor” as a novel servo motor. 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. In order to improve the power factor and the efficiency, we also proposed a new type half-wave rectified brushless synchronous motor with permanent magnets.
In this paper, we analyze the flux distribution and the torque characteristics of the new type half-wave rectified brushless synchronous motor using the finite element method. We confirm the computed torque characteristics with the experimental results.
Furthermore, We derive the steady state characteristic equations and investigate the effect of the modulation function wave forms on the motor performance. The theory is also confirmed by the experiments.