A parallel standby power supply based on a permanent magnet switch and a working method

Abstract

A parallel standby power supply based on a permanent magnet switch is composed of an energy storage module, a bidirectional DC-DC converter module, a switch controller, an excitation unit, a switch driving unit, a transmission mechanism, a vacuum switch body and an RC absorption circuit unit. The method comprises the following steps: switching on a permanent magnet switch, generating a magnetic field, switching on the vacuum switch body, supplying power, storing energy and switching off the vacuum switch body. The permanent magnet switch is added in the main loop, so that the working efficiency of the device can be improved, and integration is realized; the structure is simple, cost is saved, maintenance is convenient, operation is easy, and the cost performance is high.

Description

(1) Technical field: [0001] The invention relates to the technical field of power equipment, in particular to a novel parallel backup power supply based on a permanent magnet switch and its working method, which has the function of ensuring the stability of the load input voltage when the system power supply transient voltage fails. (2) Background technology: [0002] With the improvement of my country's modern industrial technology and people's living standards, power quality problems have become increasingly prominent, and power quality control technology has become the key to solving power quality problems. At present, one of the main problems in the power quality problem is the voltage transient fault of the system power supply, that is, voltage sag, swell and short-term interruption. The corresponding solution often uses an anti-voltage transient disturbance device as a backup power supply to effectively control the power quality. , mainly including dynamic voltage rest...

AI Technical Summary

Problems solved by technology

This circuit mainly uses the natural shut-off characteristics of the thyristor current zero crossing point, but the thyristor is a semiconductor device, which has three disadvantages of large loss, high failure rate and no physical breaking compared with mechanical switches.

[0003] The loss of the thyristor is greater than that of the mechanical switch, especially when a large current flows, the device needs to be equipped with a fan to dissipate heat due to the heating of the thyristor, which not only increases the loss of the device but also increases the cost of the device

[0004] There is no physical breaking similar to a mechanical switch after the thyristor is broken, so it is necessary to install a mechanical switch on the input and output sides of the thyristor, which increases the cost of the device

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