Novel construction elevator frequency converter band-type brake power supply system and control method

Abstract

The invention relates to a novel construction elevator frequency converter band-type brake power supply system and a control method. The system comprises a power supply circuit and a band-type brake power supply detection circuit, wherein the input port of the power supply circuit is connected with a three-phase power supply, the output port of the power supply circuit is used as a motor band-typebrake power supply interface, the output port of the power supply circuit is connected with the input port of the band-type brake power supply detection circuit, the power supply circuit comprises atransformer, an air circuit breaker, a relay and a first rectifying circuit, the input port of the transformer is connected with the three-phase power supply, the first output end of the transformer is sequentially connected with a first air circuit breaker switch and a first group of relay switches in series and then connected to the first input end of a rectifying circuit, the second output endof the transformer is connected to the second input end of the rectifying circuit, and the output end of the rectifying circuit is connected in series with a second group of relay switches and then serves as a motor band-type brake power interface. According to the invention, the novel construction elevator frequency converter band-type brake power supply system is used for safety power supply ofa motor band-type brake and detection of a feedback circuit, so that a construction hoist is controlled to operate normally.

Description

technical field [0001] The invention relates to the field of electronic circuits, in particular to a novel construction elevator inverter brake power supply system and control method. Background technique [0002] Nowadays, frequency converters have been widely used in construction elevators, and their excellent electrical performance has been more and more recognized by users. The frequency converter of the construction elevator has been developed towards miniaturization and functional integration. It has developed from the initial single frequency converter into a frequency conversion machine integrating limit protection, lifting weight limit, fingerprint and face recognition, automatic leveling and other functions. It greatly simplifies the peripheral circuit and volume of the inverter, not only reduces the volume of the original control electric box, but also reduces the cost, which is convenient for customers to produce, install and maintain equipment. [0003] Constru...

AI Technical Summary

Problems solved by technology

[0006] Fault state 1. When the motor is working, the brake is not energized and released due to circuit reasons. At this time, the load on the motor will increase. On the one hand, the motor will heat up and seriously damage the insulation of the motor. On the other hand, the brake pads will wear out. serious damage to the brake

[0007] Fault state 2, when the motor is not working, the brake is energized and released due to circuit reasons, which will cause the elevator to malfunction and slide down, eventually causing a safety accident

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