Phase-splitting control high and low voltage switch electrical equipment and control method thereof

A technology of high and low voltage switches and control methods, applied in the direction of electric switches, circuits, electrical components, etc., can solve the problems of high cost and impossibility, and achieve the effect of suppressing surge current and significant economic effects

Inactive Publication Date: 2004-08-18
上海天峰科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, this technique is expensive to implement and, when operating at high voltages above 10 kV, it is almost impossible to implement

Method used

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  • Phase-splitting control high and low voltage switch electrical equipment and control method thereof
  • Phase-splitting control high and low voltage switch electrical equipment and control method thereof
  • Phase-splitting control high and low voltage switch electrical equipment and control method thereof

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings and a preferred embodiment.

[0020] refer to figure 1 , Figure 4 , the present invention includes a controller connected with three-phase high and low voltage switchgear, the controller includes a voltage and current zero-crossing detection circuit 3, a voltage phase-locked loop frequency multiplication clock circuit 1, a current phase-locked loop frequency multiplication clock circuit 2, a micro A controller MCU4, an adaptive switch detection circuit 5, and an execution unit 6;

[0021] The three-phase voltage and current are respectively connected to the input terminals of the three-phase voltage and current zero-crossing detection circuit 3, the voltage phase-locked loop multiplier clock 1, and the current phase-locked loop multiplier clock 2, and the output signals are input to the input of the microcontroller 4 The interface is output to the execution unit 6 afte...

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Abstract

The invention relates to a phase-splitting control high and low-voltage switch electric appliance and method of controlling, the electic appliance includes a controller connected to the on-off electrical equipment, wherein the controller includes a three-phase voltage-current detecting circuit, a voltage-current phase-locked loop frequency doubling clock circuit, a microcontroller, an self-adapting on-off status detecting circuit and execution unit, wherein the three-phase voltage-current signal is inputted by voltage-current through zero passage detecting circuit, the voltage-current phase-locked loop frequency doubling clock circuit and the microprocessor unit to the execution unit for output, and the self-adapting on-off status detecting circuit feeds back the signal to the micro controller.

Description

technical field [0001] The invention relates to a high and low voltage switching device, more precisely to a high and low voltage switching device controlled by phase separation and a control method thereof. Background technique [0002] At present, the AC three-phase switches used in domestic and foreign power and electrical systems, including various circuit breakers, releases, air switches, and AC contactors in high and low voltage circuits, all adopt three-phase simultaneous connection in structure. On and off design. Using this kind of AC three-phase switching device, it is impossible to realize zero-voltage or zero-current switching and breaking, especially in high-voltage and high-current applications, sparks and arcing during switching affect system safety and serious electromagnetic interference. Not only does it affect the power supply network, but it is also easy to cause the contacts to burn out, and the life of the switch is greatly reduced. Taking the AC cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H9/56
Inventor 张若愚林在荣
Owner 上海天峰科技发展有限公司
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