High-voltage solid-state dc circuit breaker

Abstract

The application relates to the technical field of electronic power control, in particular to a high-voltage solid-state direct-current circuit breaker, which comprises a main switch, a metal-oxide-semiconductor field-effect transistor and a switch control circuit. When a power supply is connected to the input terminal of the drain of the metal-oxide-semiconductor field-effect transistor, the drain has a voltage, the power taking circuit can take power from the drain to output a driving control signal, and the driving circuit drives the metal-oxide-semiconductor field-effect transistor to be in a conduction state, so that the high-voltage solid-state direct-current circuit breaker is self-started. Since the metal-oxide-semiconductor field-effect transistor is a normally-off device, the main switch is in a conduction state, and the switch control circuit can control the conduction state of the metal-oxide-semiconductor field-effect transistor by using the power taking circuit and the driving circuit, so that the high-voltage solid-state direct-current circuit breaker can be self-started, and the volume and manufacturing cost of the high-voltage solid-state direct-current circuit breaker are reduced.

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