A power electronic switch

Abstract

The present invention relates to a power electronic switch, comprising a first switch circuit connected between the negative pole of the power supply and the negative terminal of the load R, a second switch circuit connected between the positive pole of the power supply and the positive terminal of the load R, through the first The switch circuit and the second switch circuit control the load R to turn on or off the power supply, and self-detect whether the switch circuit is turned on. The invention realizes the on-off control of the power supply, and overcomes the disadvantages of the electromagnetic relay in the traditional power electronic switch, such as heavy weight, large volume, high price, great influence on the electromagnetic environment in the product, and low service life of mechanical contacts; At the same time, it has a self-test function, which realizes the self-test of the switch state.

Description

A power electronic switch technical field [0001] The present invention relates to the technical field of switches, in particular to a power electronic switch. Background technique [0002] At present, in the switching application of the power supply, the electromagnetic relay is the most commonly used switching device, but the load current is relatively In large occasions, the electromagnetic relay is heavier in weight, larger in volume and more expensive, which directly affects the overall volume, weight and price of the product. In addition, the electromagnetic relay has a great impact on the electromagnetic environment in the product, and the mechanical contact life is low, which affects the stability of the system. Qualitative and Reliable. In some applications, solid state relays are used to realize power switches, and solid state relays overcome electromagnetic relays. It has the disadvantages of heavier weight, larger volume, greater impact on the electromagne...

AI Technical Summary

Problems solved by technology

[0002] At present, in the switching application of the power supply, the electromagnetic relay is the most commonly used switching device, but for the occasion with a large load current, the weight of the electromagnetic relay is heavy, the volume is large, and the price is relatively expensive, which directly affects the overall volume, weight and cost of the product. Cost, and the electromagnetic relay has a great impact on the electromagnetic environment in the product, and the life of the mechanical contact is low, which affects the stability and reliability of the system.

[0003] In some applications, solid-state relays are used to realize power switches. Solid-state relays overcome the shortcomings of electromagnetic relays, such as heavy weight, large volume, great influence on the electromagnetic environment, and low contact life. However, since solid-state relays have no mechanical contacts, There is no detection contact, the detection of the switch state depends on the existence of the input power supply, and the on-off state of the switch is generally judged by detecting the presence or absence of the output voltage

When the input power is not applied, the state of the switch cannot be determined, and there is no self-test function

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