SSPC for soft start of d.c. link capacitor

摘要

A solid state power controller (S SPC) (103, 200) for soft start of a direct current (DC) link capacitor (107) of a DC power distribution system (100) includes a power input connected to a DC power source (101) of the DC power distribution system (100); a plurality of power switches (209A-C) arranged in parallel, the plurality of power switches (209A-C) being connected to a power output of the SSPC, the power output being connected to the DC link capacitor (107); and an SSPC controller (207) configured to: pulse width modulate the plurality of power switches (209A-C) with a phase-shifted sequence in a current limiting mode; determine whether soft start is complete; and in response to determining that the soft start is complete, turn on the plurality of switches (209A-C) at a maximum gate-source voltage.