发明名称 PWM INVERTER CONTROL UNIT
摘要 The present invention is achieved with a control unit for a PWM inverter for comparing (8) a voltage command signal (7) with the fundamental of the inverter's output voltage waveform and for comparing (11) the result with a carrier signal (10) and using that result to keep the output voltage waveform equal to the voltage command signal. The use of the output's fundamental for feedback eliminates the prior art need to use slight delays in the inverter's switching stage thereby removing the prior art torque ripple and consequent vibration problems particularly at low speed and furthermore enables smoother stopping and starting control using variable speed ranges of several hundred to one.
申请公布号 CA1300676(C) 申请公布日期 1992.05.12
申请号 CA19890597227 申请日期 1989.04.20
申请人 OTIS ELEVATOR COMPANY 发明人 IWASA, MASAO;KITO, YASUTAMI
分类号 H02M1/12;H02M7/48 主分类号 H02M1/12
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