Intelligent controller of bistable permanent-magnet vacuum circuit breaker

Abstract

The invention discloses an intelligent controller of a bistable permanent-magnet vacuum circuit breaker and belongs to the technical field of intelligent low-voltage apparatus. The intelligent controller comprises a microprocessor, an isolating driving module, a switching-on / off brake coil driving module, a power supply failure detection module, a power supply voltage range detection module, a switching power supply module, a switching-on / off brake capacitor charging module, a switching-on / off brake capacitor charging current detection module and a power failure maintenance module. By the aid of the intelligent controller, constant-current charging of a switching-on / off brake capacitor is achieved, the service life of the capacitor is prolonged, simultaneously, a circuit of the power failure maintenance module and a circuit of the power supply failure detection module in the intelligent controller can guarantee the effective utilization of energy and the reliable switching-off of a circuit breaker under the power failure condition, circuits are simplified, the reliability of the whole intelligent controller is further improved, and the safety of power supply is guaranteed.

Description

technical field [0001] The invention discloses an intelligent controller for a bistable permanent magnet vacuum circuit breaker, which belongs to the technical field of intelligent low-voltage electrical appliances. Background technique [0002] Circuit breakers are very important electrical equipment in power distribution and power supply systems. Its task is to close and close the load current and break the short-circuit fault current to protect the electrical equipment on the power grid and the circuit from damage, so the reliability of the circuit breaker is very important. Studying the intelligent control technology of bistable permanent magnet mechanism of vacuum circuit breaker is of great significance to ensure the reliability and stability of power supply, improve the quality of power supply, and effectively improve the economic benefits and work efficiency of enterprises. After searching, the Chinese patent of the patent "circuit breaker controller" with the paten...

AI Technical Summary

Problems solved by technology

The conventional circuit breaker capacitor charging circuit is often used to directly charge the AC input power after rectification. This charging method has a great impact on the capacitor and resistor at the moment of power-on, which shortens the life of the capacitor; A battery is used to power the circuit. Since the circuit breaker needs to be opened after power failure, the output terminal of the IGBT drive circuit, that is, the optocoupler, needs 15V and above power supply, which requires a large capacity of the battery, which leads to an increase in the size of the battery. , increasing the volume of the circuit board, and the battery cannot be used normally after charging and discharging for a long time, and needs to be replaced frequently, sometimes causing accidents due to untimely replacement

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