A driving circuit applied to aerospace high-power contactor

Abstract

A driving circuit applied to an aerospace high-power contactor is provided. The circuit comprises: a closing driving circuit and a shutdown driving circuit, wherein the closing driving circuit comprises a power relay closing driving circuit, a contactor closing driving circuit and a state relay closing driving circuit. The shutdown driving circuit includes a power relay shutdown driving circuit, acontactor shutdown driving circuit, and a state relay shutdown driving circuit. The driving circuit is applied in parallel connection of a contactor and a relay, and has small driving current, high reliability, and a delay protection function, and saves a large amount of power distribution space and weight. The circuit has very wide application prospect in high-voltage high-power distribution equipment of each sub-system of current and future spacecrafts.

Description

technical field [0001] The invention belongs to the field of high-power power distribution, and relates to a drive circuit applied to aerospace high-power contactors. Background technique [0002] Traditional aerospace high-power power distribution equipment generally uses relays for power control. With the increasing complexity of spacecraft tasks, the power capacity of power systems is increasing. The rated current of common relay contacts (up to 40A) is no longer sufficient for current high-voltage high-power power distribution. need. The contactor came into being with the rated current of contacts up to 200A. [0003] However, the contactor has the following disadvantages: 1) The required driving current is large, and the driving current required by a single contactor is about 1.5A, which is far greater than the maximum driving current (300mA) that can be provided by current typical program control and remote control commands. At present, the typical high-power switch ...

AI Technical Summary

Problems solved by technology

[0003] However, the contactor has the following disadvantages: 1) The required driving current is large, and the driving current required by a single contactor is about 1.5A, which is far greater than the maximum driving current (300mA) that can be provided by the current typical program control and remote control commands.

A power distribution device usually needs more than a dozen power distribution channels, and the whole star (ship) needs at least several power distribution devices, which will take up a lot of space and weight of the whole star (ship)

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