Power supply system for vehicle

摘要

When an earth faulting has occurred in a driving device for driving a motor, a high voltage noise enters a high voltage detector through a connection node of the Y capacitor constituted by a pair of capacitors in DC/DC converter. A controller of the DC/DC converter limits the duty of switching elements constituting a full-bridge circuit on a primary side, in the case where a defect due to an earth faulting of the driving device is detected by a detection value of high voltage detector.

主权项

1. A power supply system for a vehicle including a power storage device, a driving device generating a vehicle driving force with power received from said power storage device and an auxiliary machine operated with power received from said power storage device, said power supply system comprising:
a pair of capacitors connected in series between terminals of said power storage device and having a connection node grounded; a voltage converter lowering an output voltage of said pair of capacitors by a switching operation of a switching element and supplying the voltage to said auxiliary machine; a voltage detector detecting an output voltage of said pair of capacitors; and a controller performing a switching control with respect to said switching element in accordance with a duty set based on a detection value of said voltage detector, said controller performing the switching control with respect to said switching element by limiting said duty when an error caused by earth faulting occurred in said driving device is detected by a detection value of said voltage detector.