发明名称 |
Driver for an induction motor |
摘要 |
A driver for an induction motor includes a voltage limiter which limits an upper limit value of an output voltage from an invertor circuit in accordance with an output frequency command, a lowest frequency limiter which limits a lower limit of an output frequency from the invertor circuit, a forward rotation limiter which outputs a first power supply interruption signal when the output frequency from the invertor circuit reaches the upper limit, a reverse rotation limiter which outputs a second power supply interruption signal when a reverse rotational speed of the motor reaches a reverse rotation limit level, and a low-speed overload detector which outputs a third power supply interruption signal when a state in which the second power supply interruption signal is not output continues in a low speed abnormality state.
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申请公布号 |
US5703459(A) |
申请公布日期 |
1997.12.30 |
申请号 |
US19960610826 |
申请日期 |
1996.03.05 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
YASOHARA, MASAHIRO;FUJISAKI, YOSHIHIRO;TAKADA, KAZUYUKI |
分类号 |
H02H3/08;H02H3/20;H02H5/00;H02H7/00;H02H7/093;H02M7/48;H02P27/04;H02P27/06;(IPC1-7):H02P5/34 |
主分类号 |
H02H3/08 |
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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