Current-regulated PWM voltage-source inverters with either sinusoidal or square-wave output are the most common power electronic converters used to feed PM motors. Square-wave fed permanent magnet motors yield a higher torque whereas the torque ripple of sine-wave fed brushless motors is significantly lower. An innovative topology of DC brushless motor with the stator phases being fed in series by means of a solid-state-commutator (SSC) is presented in this paper. The solid-state-commutator provides each motor phase with 180 degrees square wave current timed with respective EMF. With a PM motor having 60 degrees flat-top trapezoidal-wave EMF, the proposed novel configuration results in no torque ripple and higher average torque compared to conventional brushless DC motor drives with 120 degrees square-wave current supply. The proposed drive arrangement is suitable for EV propulsion systems based an the use of wheel motors. The paper discusses the principle of operation of the proposed drive arrangement and shows experimental waveforms taken from a drive prototype.
A novel solid-state-commutator PM motor arrangement for EV application
IEEE Industry Applications Conference IAS Annual Meeting, 34 ; 4 ; 2545-2551
1999
7 Seiten, 8 Quellen
Aufsatz (Konferenz)
Englisch