PWM (Pulse Width Modulation) chopped mode brake fully automatic control device

Abstract

The invention provides a PWM (Pulse Width Modulation) chopped mode brake fully automatic control device. The PWM chopped mode brake fully automatic control device comprises a bridge type rectifier circuit, a filtering capacitor, a first switch tube, a second switch tube, a CPU (Central Processing Unit) and a position detection switch, wherein the filtering capacitor is connected in parallel between a positive output end and a negative output end of the bridge type rectifier circuit; a drain of the first switch tube is connected to the positive output end of the bridge type rectifier circuit; a source of the first switch tube is connected to one end of an electromagnetic coil of an electromagnetic brake; a drain of the second switch tube is connected to the other end of the electromagnetic coil; a source of the second switch tube is connected to the negative output end of the bridge type rectifier circuit; gates of the first and second switch tubes are connected to the CPU; the position detection switch detects the brake state of the brake and sends monitoring information into the CPU; and the CPU adopts PWM square waves to intelligently control the first switch tube and the second switch tube. The PWM chopped mode brake fully automatic control device, disclosed by the invention, has the advantages of realizing fully automatic intelligent control and achieving the purposes of saving energy, reducing noise and prolonging service life.

Description

technical field [0001] The invention belongs to the technical field of brake control, and in particular relates to an intelligent control device used for the whole process of electromagnetic brake or clutch from brake opening—maintenance—power failure and brake on. Background technique [0002] With the promotion and popularization of elevators and permanent magnet elevator traction machines, electromagnetic brakes and clutches matched with permanent magnet elevator traction machines have been widely used. Therefore: In order to cooperate with various brakes and clutches, a variety of rectification control devices have been produced, including resistance step-down method, full-wave brake opening half-wave maintenance method, thyristor trigger method, etc. Some advanced ones can control the operating status of brakes and clutches. When the voltage is high, the power-on and power-off closing are out of control, resulting in excessively loud opening and closing sounds, which ha...

AI Technical Summary

Problems solved by technology

Therefore: In order to cooperate with various brakes and clutches, a variety of rectification control devices have been produced, including resistance step-down method, full-wave brake opening half-wave maintenance method, thyristor trigger method, etc. Some advanced ones can control the operating status of brakes and clutches. However, the power-on and power-off closing are out of control, resulting in excessively loud opening and closing sounds, which have a large impact on the mechanical structure, waste materials, waste energy, and affect the service life of the brake.

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