Permanent magnetic contactor and control device thereof

Abstract

A permanent magnetic contactor and its control device are used in starting switch control devices and engines and switching on and off the master circuit. A permanent magnetic steel is set between two static cores to form a U-like bulk, two iron cores connected in series and in a same polarity, a tower spring supports the framework of the packet, the top of the tower spring is connected with a dynamic core. The output over voltage protection part of said control device is connected with the rectification part, output of which is connected with a low-voltage judgment part the output of which is connected with a shut off executing part and the output of which is connected with the wire packet.

Description

technical field [0001] The invention relates to a permanent magnet contactor, which is used for switching equipment, control equipment and motor starting to perform closing and opening operations on a main circuit, and belongs to the technical field of contactor manufacturing. Background technique [0002] The traditional contactor is to generate a magnetic field by wrapping the electromagnetic wire to maintain the pull-in state of the contacts. During the power-on and pull-in period of the wire package, on the one hand, electric energy is consumed. Due to the large working current during operation, the electric energy is lost on the hysteresis, eddy current and short-circuit ring, and most of the active power consumption of the wire package is lost as heat; on the other hand, Burnout of the wire package often occurs. When the power supply voltage is too low, the electromagnetic force will be significantly reduced; when the alternating current crosses zero, under the action...

AI Technical Summary

Problems solved by technology

During the power-on and pull-in period of the line package, on the one hand, it consumes electric energy. Due to the large operating current during operation, the electric energy is lost in the hysteresis, eddy current and short-circuit ring, and most of the active power consumption of the line package is lost as heat; on the other hand, The phenomenon of wire package burning will often occur

When the power supply voltage is too low, the electromagnetic force will be significantly reduced; when the AC current is zero, under the action of the return spring, the moving iron core of the contactor and the main contact will vibrate strongly, which will not only shorten the service life of the contactor, but also will affect the reliability of power supply

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