Solid-state high-power switch suitable for DC distribution looped network of more-electric aircraft

Abstract

The invention discloses a solid-state high-power switch suitable for a DC distribution looped network of a more-electric aircraft. The solid-state high-power switch comprises a main switch circuit, an auxiliary power supply circuit, an energy absorption circuit, a detection circuit and a single-chip microcomputer control circuit, the main switch circuit is used for supporting bidirectional flow of high-power current; the auxiliary power supply module comprises a switching power supply which is used for outputting the direct-current looped network voltage to direct-current power supply voltage required by each module, and the switching power supply comprises transformer isolation; the detection circuit comprises a current detection unit and a voltage detection unit and is used for detecting current and voltage signals of the circuit; the single-chip microcomputer control circuit is used for receiving measurement data of the detection circuit, carrying out initial processing on the measurement data and driving an IGBT to be switched on or switched off. According to the solid-state high-power switch, the problems that a traditional mechanical switch is low in response speed, prone to abrasion, complex in maintenance and the like are solved through the solid-state switch technology, and the reliability and the operation efficiency of a power distribution system are improved.