Method and System for Estimating Brake Torque of Elevator Traction Machine

Abstract

The invention relates to an estimation method and system for the torque of a brake of an elevator traction machine. The estimation method comprises the following steps: when an elevator enters the sleep state and is in a preset brake detection cycle, entering a brake detection mode, and controlling the brake to hold tightly; driving an elevator inverter to apply preset driving torque to the elevator traction machine; collecting slide pulse numbers sent by an encoder of the elevator traction machine in real time, and obtaining the output current value of the elevator inverter; according to the slide pulse numbers and the output current value collected in the period of time of applying the preset driving torque, calculating the size of the torque of the brake; when the obtained torque of the brake is smaller than the rated torque of the brake, controlling the elevator to stop running or generating a warning fault report. For the condition that the torque of the brake is not enough, the method reports the fault and prompts and informs the elevator maintenance personnel to repair the elevator brake, therefore effectively protecting the safety of passegers.

Description

technical field

[0001] The invention relates to elevator brake control technology, in particular to a method and system for estimating brake torque of an elevator traction machine. Background technique

[0002] The holding brake is an electromechanical device that prevents the elevator from moving again when the elevator car is at rest and the motor is in a power-off state. In the actual use of the elevator, there are often slides due to insufficient braking force of the holding brake, resulting in serious safety hazards. Accidents, and in the daily maintenance of the elevator, there is no effective means to detect the braking force of the brake. If the braking torque decreases, it will seriously affect the personal safety of passengers. Contents of the invention

[0003] Based on this, it is necessary to provide a method and system for estimating the braking torque of the elevator traction machine for the detection of the braking force and the braking torque of the eleva...

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