发明名称 |
Elevator system |
摘要 |
A traction elevator system including an elevator car driven by a drive arrangement having electrically isolated high and low speed components. Fixed AC and controllable DC voltages are selectively applied to the high and low speed components, respectively, at predetermined portions of the run, to control the drive torque to provide smooth operation of the elevator car.
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申请公布号 |
US4278150(A) |
申请公布日期 |
1981.07.14 |
申请号 |
US19790041449 |
申请日期 |
1979.05.22 |
申请人 |
WESTINGHOUSE ELECTRIC CORP. |
发明人 |
WEHRLI, III, HENRY A.;BOOMGAARD, DIRK J.;LUND, DECEASED, ALVIN O. |
分类号 |
B66B1/30;B66B1/16;B66B1/28;(IPC1-7):B66B1/30 |
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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