Invention Grant
- Patent Title: Method for providing a load compensation signal for a traction elevator system
- Patent Title (中): 为牵引电梯系统提供负载补偿信号的方法
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Application No.: US102069Application Date: 1987-07-29
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Publication No.: US4754850APublication Date: 1988-07-05
- Inventor: William R. Caputo
- Applicant: William R. Caputo
- Applicant Address: PA Pittsburgh
- Assignee: Westinghouse Electric Corp.
- Current Assignee: Westinghouse Electric Corp.
- Current Assignee Address: PA Pittsburgh
- Main IPC: B66B1/28
- IPC: B66B1/28
Abstract:
A method for providing a load compensation signal for the drive motor control loop of a traction elevator system which includes an elevator car, a counterweight, and a drive which includes a drive motor, brake, and traction drive sheave. The brake is mounted to provide an indication of the direction of unbalanced brake torque, with the method including the step of detecting unbalanced brake torque when the elevator car is stationary. A car load compensation signal is provided in response to the detecting step, with the compensation signal transferring the unbalanced torque from the brake to the drive motor, building up the motor current to provide motor torque sufficient to hold the car stationary while the brake torque is reduced to zero. The method then continues by using the motor current to provide car loading signals for use by the supervisory control portion of the elevator system.
Public/Granted literature
- US4271198A Chewing gum having a soft texture Public/Granted day:1981-06-02
Information query
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