| 摘要 |
PROBLEM TO BE SOLVED: To prevent breaking of a current by soft switching from becoming disabled by an overcurrent flowing in a filter reactor during an initial charge of a filter capacitor, as well as prevent a transformer from being bias-magnetized by pulse decimation.SOLUTION: A DC power supply device is provided with a controller for executing a process to decimate on-pulses by disabling a gate signal for a main switching element and a resonance switching element. This on-pulse decimation process is provided with means for determining, on the basis of the circuit constant of a DC-DC converter including a resonance circuit and an input power supply voltage, the number of times the pulse is on when the voltage of a filter capacitor connected to the output side, i.e., a DC output voltage, has increased by a prescribed voltage from a DC output voltage command value, or when the DC output voltage is less than the prescribed voltage. |
