Solid state power controller SSPC, in addition to basic on/off power switching, is a typicalSSPC characteristicsWhat's there? It provides many protection functions, including fast short-circuit protection, which makes the circuit inactive for up to 1mS. Circuit deactivation involves gradually removing the gate drive of the channel switching MOSFET over a period of 500 μ s to 1mS to minimize EMI emissions. Referring to Figure 1, for overload protection,SSPCImplement the "I 2 t" (I 2 t) detection method to protect wires and loads while still preventing high surge currents from switching to motors, solenoids, capacitive loads (such as electronic power supplies), or incandescent lamp loads that can cause "interference tripping". Under I 2 t protection, when the measured load current is 10 times or more the rated current, the SSPC will immediately trip. For lower current values, SSPC's processor will perform continuous calculations, resulting in longer trip times in overload situations where the load current is between 1 and 10 times the rated value.

Modern SSPC boards are based on processors and provide advantages in flexibility, measurement and calculation accuracy, and connection to external power management computers through data buses or network interfaces such as CAN bus, Ethernet, or MIL-STD-1553. Other features includeSSPCThe rated current of the channel is programmed to different values to adapt to different loads, as well as the ability to parallelize multiple SSPC channels to achieve higher current capacity. To support prediction, diagnosis, health monitoring, as well as fault detection and isolation, the power management computer can poll the values of various SSPC parameters through the board's bus or network interface. And the basic voltage and/or output parameters on each board, as well as these parameters. These data will allow the power management computer to pre determine the status of the generator, battery, wiring, connectors, load, and onboard SSPC.