Elevator Brake Freewheeling Control Method, Device, Equipment and Medium

Abstract

The embodiment of the present invention discloses a method, device, equipment and medium for controlling the freewheeling flow of an elevator brake, and relates to the technical field of elevators. The method for controlling the freewheeling flow of an elevator brake includes: determining the state of the elevator and the control corresponding to the state of the elevator Instructions: According to the control signal corresponding to the control instruction, chopping control is performed on the current of the brake coil until the current of the brake coil is reduced to the current threshold corresponding to the state of the elevator. The present invention controls the current of the brake coil through the control signal corresponding to the control command to achieve the purpose of actively adjusting the electromagnetic force, thereby changing the release time and release noise of the brake, thereby effectively reducing the release noise and shortening the release time. Meet the needs of different brakes.

Description

technical field [0001] The invention relates to the technical field of elevators, in particular to a method, device, equipment and medium for controlling the freewheeling flow of an elevator brake. Background technique [0002] Elevator brakes, commonly known as holding brakes, play an important safety role in the elevator control system. For example, the normal stop or emergency stop of the elevator requires the participation of the elevator holding brake. [0003] In actual processing, the elevator brake includes two working conditions of normal braking and emergency braking. Normal braking requires low release noise, and emergency braking requires short braking and stopping distances. When the elevator brakes normally in the traditional brake control mode, such as figure 1 As shown, first disconnect the brake contactor KM2, so that the brake coil current is released through the freewheeling circuit, and after a period of delay, for example, after a delay of 1 second, the...

AI Technical Summary

Problems solved by technology

It can be seen that according to the traditional brake control method, no matter whether it is normal braking or emergency stop of the elevator, the maintenance current at the initial moment of brake release and the freewheeling resistance during the brake release process are unchanged, which directly leads to the normal and emergency stop of the brake. There is no difference in the release time, that is, the traditional brake control method has the problem of not being able to reduce the maximum noise of the brake release and shorten the release time, resulting in the difficulty of matching the brake and the use of various brake freewheeling resistors.

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