PRE-CHARGE CIRCUIT AND BRAKING ENERGY MANAGEMENT FOR A POWER CONVERTER

원문 (중국어)

A system includes: a direct current (DC) bus; a converter connected to the DC bus; a capacitive network electrically connected to the DC bus; and an energy management apparatus configured to pre-charge the capacitive network in a pre-charge mode and to dissipate energy from the DC bus in a braking mode. The energy management apparatus includes: a pre-charge circuit configured to pre-charge the capacitive network, the pre-charge circuit including: one or more pre-charge switches, each pre-charge switch being a controllable semiconductor switch; and a pre-charge impedance in parallel with the one or more pre-charge switches; and a braking resistance assembly electrically connected to the pre-charge circuit. The braking resistance assembly is configured to be electrically connected to the DC bus during the braking mode.