Patent ID: 9160240
Filing Date: 2015-10-13
Classification: H01J,H01T,H02J,H02M,H05H

Abstract:
1. A DC power supply device, comprising a current source chopper forming a direct current source, a multiphase inverter for converting a DC output from the current source chopper into multiphase AC power by operating multiple switching elements, a rectifier for subjecting an output from the multiphase inverter to AC-DC conversion to supply direct current being obtained to a load, and a controller for controlling the current source chopper and the multiphase inverter, the controller having a control function for performing suspend and resume control of the DC output, the control function for performing the suspend and resume control comprising the functions of, suspend control for switching a main switch of the current source chopper from ON state to OFF state, upon suspending the DC output from the DC power supply device, and suspending generation of a gate signal for a bridge circuit constituting the multiphase inverter, simultaneously with establishing a short circuit between a positive terminal and a negative terminal in the bridge circuit, suspend holding control for holding, under suspension of the DC output from the DC power supply device, the OFF state of the main switch of the current source chopper, and the short circuit state between the positive terminal and the negative terminal in the bridge circuit, and holding a phase of a gate signal state in the bridge circuit to be the same as a phase of the gate signal state upon suspending, and resume control for switching the main switch of the current source chopper from OFF state to ON state, resuming the generation of the gate signal for the bridge circuit based on the phase of the gate signal state upon suspending, and restarting the multiphase inverter by the gate signal.