Elevator brake follow current control method, device and equipment and medium

Abstract

The embodiment of the invention discloses an elevator brake follow current control method, device and equipment and a medium, and relates to the technical field of elevators. The elevator brake followcurrent control method comprises the steps that the elevator state and a control instruction corresponding to the elevator state are determined; and according to a control signal corresponding to thecontrol instruction, the brake coil current is subjected to chopping control till the brake coil current is reduced to the current threshold value corresponding to the elevator state. The brake coilcurrent is controlled through the control signal corresponding to the control instruction, the purpose of actively adjusting the electromagnetic force is achieved, accordingly, the brake releasing time and noise can be changed, accordingly, releasing noise reduction and releasing time shortening can be effectively considered, and the usage requirements of different brakes are met.

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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