POWER SUPPLY CONTROL DEVICE, POWER SUPPLY DEVICE CONTROL METHOD, AND COMPUTER-READABLE RECORDING MEDIUM CONTAINING PROGRAM FOR CAUSING COMPUTER TO EXECUTE THE POWER SUPPLY DEVICE CONTROL METHOD

摘要

A motor drive device (100) includes first to third system main relays (SMRB, SMRG, SMRP), a limiting resistor (Rp), and a control device (30). Upon start of the motor drive device (100), the control device (30) determines whether or not the first and third system main relays (SMRB, SMRP) are welded, based on voltage VH. If the control device (30) determines that the first and third system main relays (SMRB, SMRP) are both welded, then it prohibits a discharging process, which is to discharge a capacitor (13) using motor generators (MG1, MG2).