Permanent magnet mechanism controller

Abstract

The invention provides a permanent magnetic controller, which comprises a trip and a closing coils and a position detecting circuit and a driving control circuit thereof, and a single chip microcomputer and a keyboard thereof; wherein, the detecting circuit adopts a hall current sensor, and is used for collecting current waveform signals of the trip and closing coils, transforming the current waveform signals to voltage signals through a conditioning circuit, and transmitting the voltage signals to the single chip microcomputer; the keyboard is used for inputting tripping and closing instructions; and the single chip microcomputer analyzes and compares the current waveform detection signals with a reference current waveform, and outputs tripping and closing driving signals through the driving control circuit respectively to the trip and the closing coils. The permanent magnetic controller has the advantages that as the closing and trip coil current waveform intercomparison technology is adopted, the reliability of movements of a circuit breaker is improved; furthermore, as heights of waveforms on the trip and the closing coils cannot reach saturation, the aging degree of the coils is reduced, and the service life of a permanent magnetic coil is prolonged.

Description

technical field [0001] The invention relates to a control device, in particular to a permanent magnet mechanism controller. Background technique [0002] At present, some of the known control methods of vacuum circuit breakers with permanent magnet mechanism adopt DC contactor control mode. This control method is simple, but the control time is long. The current on the coil of the magnetic mechanism can only be cut off after reaching the saturation current of the coil, which has a great impact on the aging and service life of the coil, and its control degree cannot be intelligent. The other is to use the controller mode. This controller relies on the contact action of the position proximity switch as the basis for judging the position status of the permanent magnet mechanism. The controller can only execute the action command after detecting the position status signal. Because the position proximity switch is an electronic product and requires long-term power supply, the po...

AI Technical Summary

Problems solved by technology

Because the position proximity switch is an electronic product and needs long-term power supply, the position proximity switch is often burned or short-circuited, causing the circuit breaker to fail to operate normally when it needs to operate, which affects the reliability of power supply.

Images