发明名称 |
METHOD AND APPARATUS FOR CONTROLLING PWM INVERTER |
摘要 |
<p>An AC motor such as an induction motor or a synchronous motor is driven by a PWM inverter. Turn-on of the PWM inverter is controlled by PWM pulse signals obtained as a result of comparison between voltage command signals (a modulation signal) and a carrier wave signal. The voltage command signals are obtained as a function of errors between current command signals and detected current signals. Ripples included in the voltage command signals are so suppressed as to be decreased as the rotation speed of the AC motor becomes lower. By so suppressing the ripples, the level of noise generated from the motor can be reduced especially when the motor operates in a low-speed rotation range.</p> |
申请公布号 |
CA1216323(A) |
申请公布日期 |
1987.01.06 |
申请号 |
CA19840448345 |
申请日期 |
1984.02.27 |
申请人 |
HITACHI, LTD. |
发明人 |
NAGASE, HIROSHI;MATSUDA, YASUO;NINOMIYA, HISAKAZU |
分类号 |
H02M7/527;(IPC1-7):H02P7/622 |
主分类号 |
H02M7/527 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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