| 摘要 |
PROBLEM TO BE SOLVED: To provide a DC power supply device having a good power factor, and ensuring high calmness and quietness. SOLUTION: The DC power supply device includes a reactor 2 connected to one end of an AC power supply 1, a rectifying means 3 connected to the other end of the AC power supply 1 and the other end of the reactor 2, a short circuit means 4 connected to the same other end of the AC power supply 1 and the same other end of the reactor 2, and short-circuiting the AC power supply 1 via the reactor 2, and a control means 5 which controls the short circuit means 4. The control means 5 controls the short circuit means 4, and short-circuits the AC power supply 1 only for a period calculated based on a natural frequency of the reactor 2 once per half cycle of the AC power supply 1. COPYRIGHT: (C)2011,JPO&INPIT
|
