Fast vacuum circuit breaker used for protecting high-power power electronic converter

Abstract

The invention provides a fast vacuum circuit breaker being fast in movement and strong in reliability and used for protecting a high-power power electronic converter. The fast vacuum circuit breaker comprises a circuit break contact finger part, a contact part and a permanent magnet operation mechanism part, wherein the circuit break contact finger part comprises a conducting bar, a buffer spring, a contact finger base, a slide bar and a spring contact finger; the contact part comprises a fixed contact, a moving contact and a vacuum arc extinguish chamber; the permanent magnet operation mechanism part comprises an insulating draw bar, a moving rod, a switching-on repulsion coil arranged at the upper part of the draw bar, a fixed repulsion coil, a tripping repulsion coil, an electromagnet and a tripping spring. In addition, for the switching-on repulsion coil, the fixed repulsion coil and the tripping repulsion coil as well as the supply circuit of the electromagnet, a device allowing hand power generation can be arranged.

Description

technical field [0001] The invention relates to a fast permanent magnet vacuum switch, in particular to a fast permanent magnet vacuum circuit breaker for protecting high-power power electronic converters. Background technique [0002] At present, in the domestic circuit breaker market, due to vicious competition among enterprises, the quality of products has been continuously declining, which has seriously threatened the survival and development of enterprises and the product safety of users. The quality problems brought to the end users are more and more worrying. The market began to urgently need a vacuum circuit breaker that is safe, reliable, easy to maintain and operate, and moderately priced. In the late 1990s, a new type of vacuum circuit breaker - the intelligent integrated permanent magnet mechanism vacuum circuit breaker - gradually appeared. [0003] This type of circuit breaker is based on the permanent magnet mechanism and adopts the method of electromagnetic ...

AI Technical Summary

Problems solved by technology

Due to uneven quality control, there are some problems: such as quality problems of capacitor energy storage components, unreliable electric opening and closing, etc. The existence of these problems has caused some bad effects on users, resulting in integrated permanent magnets. Vacuum circuit breaker technology is immature, and the time for large-scale promotion has not yet arrived. Misunderstandings have seriously affected the further development of this technology.

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