AUXILIARY POWER SOURCE DEVICE FOR VEHICLE

摘要

An auxiliary power source device for a vehicle, comprising a three-phase inverter for converting an input direct-current voltage to a three-phase alternating-current voltage and applying the three-phase alternating-current voltage to a load, the auxiliary power source device being mounted to an electric vehicle, wherein there are provided: a filter reactor (5) connected to output terminals of the three-phase inverter (3); a filter capacitor (6) wired in a Y configuration at the load-side end of the filter reactor (5), the neutral point of the filter capacitor not being grounded; and a three-phase transformer (7) wired in a Y configuration at the load-end side of the filter reactor (5), the neutral point of the three-phase transformer being grounded, and the three-phase transformer being equipped with secondary coils (7b1-7b3) wired in a Delta configuration and primary coils (7a1-7a3).