Intelligent protection type permanent magnetic contactor capable of performing remote communication

Abstract

The invention discloses an intelligent protection type permanent magnetic contactor capable of performing remote communication. The contactor comprises a rectification filtering circuit, a control module, a coil, and an energy storage capacitor which are sequentially connected with an alternating current power supply; a power module is connected with a microprocessor, an acquisition chip processing module, a liquid crystal display operation module, a switching value input circuit and a communication module respectively; the microprocessor is connected with the acquisition chip processing module, the liquid crystal display operation module, the switching value input circuit and the control module respectively; at the same time, the microprocessor is connected with a communication interface output circuit through a communication protocol chip, a first photoelectronic isolation bus driver and a second photoelectronic isolation bus driver respectively; the communication interface output circuit is connected with a field bus circuit; and the acquisition chip processing module is connected with a main circuit three-phase voltage acquisition processing circuit, a main circuit three-phase current acquisition processing circuit and a zero sequence current acquisition processing circuit. The permanent magnetic contactor realizes the intellectualization function of integrating the measurement, setting, protection, communication and control.

Description

technical field [0001] The invention relates to an intelligent protective permanent magnet contactor capable of remote communication, which realizes the intelligentization and remote communication functions of the permanent magnetic contactor, and belongs to the technical field of intelligentization and communication of electric appliances. Background technique [0002] The permanent magnet contactor realizes all the functions of the electromagnetic contactor by means of permanent magnet holding and electronic control, and has the advantages of simple structure, few parts, almost no noise, little influence from grid voltage fluctuations, and remarkable energy-saving effect. Foreign scholars and contactor manufacturers have carried out a lot of research on permanent magnet contactors. Existing research mainly focuses on the operating mechanism of the permanent magnet contactor and the method of simulating the control circuit. After retrieval, the patent No. 91207494.9 of the...

AI Technical Summary

Problems solved by technology

Therefore, the permanent magnet contactor with a single function and can only be used as a switch can no longer meet the automation requirements of low-voltage power distribution systems. Further research on low-voltage electrical appliances with remote communication technology and intelligent protection functions has become the trend and main development direction of electrical appliances today.

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