发明名称 |
Elevator speed control apparatus with drive motor residual secondary magnetic flux control |
摘要 |
An elevator speed control apparatus includes an inverter connected to an AC power source so as to supply an induction motor for driving an elevator with a variable-voltage, variable-frequency AC. A contactor provided between the invertor and the AC power source. A magnetic flux computing device computes residual value of secondary magnetic flux of the induction motor while the contactor is closed. A control device divides a primary current of the induction motor into an exciting current component and a torque current component so as to perform vector control, this control device being also used to generate a forcing pattern for the exciting current component in accordance with an output of the magnetic flux computing means when the contactor is closed.
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申请公布号 |
US5270498(A) |
申请公布日期 |
1993.12.14 |
申请号 |
US19910704208 |
申请日期 |
1991.05.22 |
申请人 |
MITSUBISHI DENKI KABUSHIKI KAISHA |
发明人 |
TANAHASHI, TORU |
分类号 |
B66B1/30;B66B1/28;H02P21/00;H02P27/06;(IPC1-7):B66B1/28;H02M5/451;H02P5/172 |
主分类号 |
B66B1/30 |
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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