Title:
3相電力変換装置
Document Type and Number:
Japanese Patent JP4645808
Kind Code:
B2
Abstract:
A non-outage power supply system comprises three-phase ac input terminals and three-phase ac output terminals, between which there are sequentially connected a three-phase ac-to-dc converter circuit, a capacitor, and a three-phase dc-to-ac converter circuit. A bypass switch is connected between a preselected one of the three-phase ac input terminals and a preselected one of the three-phase ac output terminals. A bypass switch control circuit holds the bypass switch closed when the three-phase ac inputs are in phase with the three-phase ac outputs, and open when they are not. Part or all of the effective current demanded by the load bypasses the three-phase dc-to-ac converter circuit when the bypass switch is closed, with a consequent reduction of power loss.
Inventors:
Shinji Sato
Fumio Nagamatsu
Takahiro Kaneda
Yuji Fuse
Shoichi Kawauchi
Osamu Iyama
Fumio Nagamatsu
Takahiro Kaneda
Yuji Fuse
Shoichi Kawauchi
Osamu Iyama
Application Number:
JP2004365502A
Publication Date:
March 09, 2011
Filing Date:
December 17, 2004
Export Citation:
Assignee:
Sanken Electric Co., Ltd.
International Classes:
H02M7/48; H02M7/12
Domestic Patent References:
| JP4087571A | ||||
| JP7039160A | ||||
| JP8331860A |
Attorney, Agent or Firm:
Noriji Takano