Intelligent phase selection switch controller

Abstract

The invention discloses an intelligent phase selection switch controller, and belongs to the technical field of power electronics. The intelligent phase selection switch controller comprises a microprocessor, a power supply circuit, a displaying circuit, a failure alarming circuit, a voltage zero point capturing signal collecting processing circuit, a current zero point capturing signal collection processing circuit, a voltage failure detection signal collection processing circuit, a current failure detection signal collection processing circuit, a magnetic latching relay driving circuit and a switch controller mode conversion circuit. The microprocessor receives input commands and signals input by the four signal collection circuits, carries out processing on the input signals, and controls the magnetic latching relay to achieve zero passage switching. The intelligent phase selection switch controller can achieve flashy-flow-free input of a capacitor and electric-arc-free disjunction of relay contactors, can detect and automatically compensate action time error of zero switching, and can carry out detection on the performance of the relay, so that a user an replace different magnetic latching relays according to actual needs.

Description

technical field [0001] The invention relates to an intelligent phase selection switch controller, which belongs to the technical field of power electronics. Background technique [0002] In the field of electrical control, high current on-off control of alternating current is required in many occasions. Its typical application is the switching control of compensation capacitors during power factor compensation. This type of high current on-off will mainly cause two problems. One is that the surge current will pollute the power grid, and the other is that it will reduce the life of the control relay. To solve these problems, some solutions have been proposed. [0003] The current capacitor switch is mainly divided into three categories: one is the traditional purely mechanical contactor switch, such as the Chinese patent application number 200820050810.8, which discloses an "AC contactor control switch", which includes the first A switch and a second switch, wherein the fi...

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Problems solved by technology

[0004] The present invention addresses the above problems, the main purpose of which is to solve the problem that the capacitor switch has a large inrush current when it is closed, and it is easy to generate an arc when it is disconnected, and further solves the problems that the current phase selection switch has a large zero-point switching error and a narrow application range. , and provide an intelligent phase selection switch controller that has no impact on capacitors during switching, low power consumption, high precision, and can be applied to different occasions

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