DC system protection apparatus with communication resetting function

A DC system protection apparatus with a communication resetting function, comprising:

• at least one load;
• at least one DC power supply system, connected to the at least one load;
• a DC solid-state circuit breaker, connected in series with the at least one load and the at least one DC power supply system;
• a current sensor, connected in series with the at DC solid-state circuit breaker, the at least one load and the at least one DC power supply system;
• a reset/break controller, connected to the current sensor, the reset/break controller controlling breaking and resetting of the DC solid-state circuit breaker;
• and
• a reset communication module, connected to the reset/break controller;
• wherein the DC solid-state circuit breaker comprises:
• a power semiconductor element, connected to the current sensor and the at least one load;
• a gate driver, connected to the power semiconductor element, the gate driver receiving a pulse width modulation (PWM) signal from the reset/break controller;
• a cooling structure, connected to the power semiconductor element;
• and
• a voltage clamping circuit, bridging two ends of the power semiconductor element;
• wherein the PWM signal issued by the reset/break controller is transmitted via a forward-flyback circuit between the reset/break controller and the DC solid-state circuit breaker;
• wherein when the current sensor detects that a current flowing through is greater than a break threshold, the current sensor notifies the reset/break controller to transmit a PWM signal with an increased duty cycle via the forward-flyback circuit, for the gate driver to drive the power semiconductor element to be disconnected;
• wherein the reset communication module, upon receiving a reset signal, notifies the reset/break controller to transmit a PWM signal with a reduced duty cycle via the forward-flyback circuit, for the gate driver to drive the power semiconductor element to be reset.