Opening surge current control device suitable for spacecraft power supply and distribution system

Abstract

The invention relates to a startup surge current suppression device applicable to a spacecraft power distribution system, which is a surge current suppression circuit connected between a relay and electric equipment. The startup surge current suppression device comprises a first fuse, a second fuse, a time-delay fusing resistor, a divider circuit, a first capacitor, a second capacitor and an N-channel field-effect transistor, wherein the first fuse and the second fuse are connected in series in a loop; the first fuse and the time-delay fusing resistor are connected in series, and then connected in parallel with the second fuse; the divider circuit is connected in series in the loop; the first capacitor and the second capacitor are used for adjusting a startup time-delay parameter; the first capacitor and the second capacitor are connected in series, and then connected in parallel with a third resistor; and the N-channel field-effect transistor is connected in series among the fuses, the electric equipment and a power supply loop. The startup surge current suppression device is applicable to an on-off circuit of the spacecraft power distribution system, can effectively reduce startup surge current caused by capacity charge in a starting process, and prolong the service life of contacts of the relay.

Description

technical field [0001] The invention relates to a power-on surge current suppressing device, in particular to a power-on surge current suppressing device suitable for a power supply and distribution circuit of a spacecraft power supply system. Background technique [0002] Relays have been used for at least several decades as a common control device, and the contacts of relays have a problem of service life. In industrial applications, a new relay can be replaced with a new relay after the contact is damaged, but in aerospace applications, such as parts on satellites, it is impossible to repair after the sky. Magnetic latching relays are widely used on spacecraft to switch the load on and off. Since the load power input circuit inevitably uses a capacitor, the power supply charges the capacitor at the moment of startup, and the surge current generated by charging will be as high as several amperes to tens of amperes. This The peak surge current is often several to several h...

AI Technical Summary

Problems solved by technology

[0004] The traditional anti-sparking circuit has the device and method of using series resistors and capacitors, and the method of series inductors in the loop, etc., but they cannot completely suppress the surge current to a reasonable range, and the excessive series inductance will also lead to self-excitation of the circuit occur

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