发明名称 |
AC ELEVATOR CONTROL SYSTEM |
摘要 |
<p>The disclosed AC elevator control system comprises a converter for converting a three-phase AC power applied to it through an electromagnetic switch closed for the start of an associated elevator car, to a direct current, and an inverter for inverting the direct current smoothed by a smoothing capacitor to a three-phase AC power with a variable voltage at a variable frequency which is supplied to a three-phase induction motor for controllably traveling the elevator car. A rectifier is connected across the smoothing capacitor through an impedance element to continuously apply a rectified voltage from the firstmentioned AC power to the capacitor and a voltage sensor relay connected across the capacitor senses the voltage on the latter and prevents the electromagnetic switch from being closed when the sensed voltage is low.</p> |
申请公布号 |
CA1199433(A) |
申请公布日期 |
1986.01.14 |
申请号 |
CA19830431767 |
申请日期 |
1983.07.04 |
申请人 |
MITSUBISHI DENKI KABUSHIKI KAISHA |
发明人 |
NOMURA, MASAMI |
分类号 |
H02P1/26;B66B1/06;B66B1/28;B66B1/30;H02M7/48;(IPC1-7):B66B1/00;B66B1/24 |
主分类号 |
H02P1/26 |
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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