发明名称 |
Door control system using drive motor torque signals |
摘要 |
A system for controlling operation of an elevator car door includes a torque command output device for outputting a torque command for controlling a car door driving motor on the basis of a difference between a speed command commanding the operating speed of the motor and the actual speed of operation of the motor, a door position detector for detecting the position of the car door in terms of the number of pulses in a pulse train produced by an encoder connected to the motor, and a memory for storing torque limit values as a function of the door position. The system also has a controller which reads the torque limit value corresponding to the car door position detected by the door position detector. The controller then compares the read torque limit value with a torque command output from the torque command output device and generates a reversing instruction to be given to the motor upon determining that the torque command is not smaller than the torque limit value. An obstruction of the door is sensed as a rise in the torque command so that the car door is reversed to ensure safety.
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申请公布号 |
US5131506(A) |
申请公布日期 |
1992.07.21 |
申请号 |
US19910651981 |
申请日期 |
1991.02.07 |
申请人 |
MITSUBISHI DENKI KABUSHIKI KAISHA |
发明人 |
MIZUNO, MASAMOTO;TAWADA, MASANORI;HIRABAYASHI, TERUMI;KODERA, TOSHIYUKI |
分类号 |
B66B13/14;B66B13/26;G05D3/12 |
主分类号 |
B66B13/14 |
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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