发明名称 |
APPARATUS FOR CONTROLLING A.C. MOTOR |
摘要 |
A first PWM inverter for converting the ac voltage of an ac power source to a dc voltage is connected through a dc circuit with a second PWM inverter for driving an ac motor. A smoothing capacitor is provided in the dc circuit. The firing angles of the first inverter are so controlled that the voltage in the dc circuit may be kept at a predetermined value and the second inverter is controlled in accordance with the speed instruction signal for the ac motor, whereby the ac motor can operate a regenerative operation without inducing higher harmonic components. |
申请公布号 |
DE3067660(D1) |
申请公布日期 |
1984.06.07 |
申请号 |
DE19803067660 |
申请日期 |
1980.01.07 |
申请人 |
HITACHI, LTD. |
发明人 |
OKUYAMA, TOSHIAKI;NAGASE, HIROSHI |
分类号 |
H02M7/757;G05F1/70;H02M5/45;H02M7/06;H02M7/12;H02M7/155;H02P3/18;H02P23/06;H02P27/06;(IPC1-7):H02P7/62 |
主分类号 |
H02M7/757 |
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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