VOLTAGE CONVERSION DEVICE AND DETERMINATION METHOD, AND RECORD MEDIUM RECORDING PROGRAM FOR PERMITTING COMPUTER TO DETERMINE CAUSE FOR FAILURE IN VOLTAGE CONVERSION AND CAPABLE OF BEING READ BY COMPUTER

摘要

PROBLEM TO BE SOLVED: To provide a voltage conversion device capable of determining a cause for failure in a voltage converter for converting DC voltage from a DC power supply into output voltage. SOLUTION: A controller 30 receives a DC current IB from a current sensor 11 and determines whether or not the possible cause is a reactor L1. If not, the controller 30 turns off system relays SR1, SR2, discharges DC power accumulated in a capacitor C2 with a boosting converter 12 stopped, and determines which is the cause of failure, NPN transistors Q1, Q2 or a voltage sensor 13. COPYRIGHT: (C)2004,JPO