发明名称 |
Elevator control apparatus |
摘要 |
An inverter, which supplies an induction motor for driving an elevator with DC power, is controlled by means of a vector control method. A rotating angular speed of the induction motor is detected from a torque component of a detected motor current. A present position of an elevator cage is calculated on the basis of the detected rotating angular speed.
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申请公布号 |
US4773508(A) |
申请公布日期 |
1988.09.27 |
申请号 |
US19880148431 |
申请日期 |
1988.01.26 |
申请人 |
HITACHI, LTD. |
发明人 |
MINE, TOSHISUKE;TAKAHASHI, HIDEAKI;ARABORI, NOBORU;KOMURO, KATSU;INABA, HIROMI |
分类号 |
B66B3/02;B66B1/06;B66B1/30;H02P27/06;(IPC1-7):B66B1/30 |
主分类号 |
B66B3/02 |
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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