Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
HIGH-FREQUENCY MODULATION/DEMODULATION MULTIPHASE RECTIFYING DEVICE
Document Type and Number:
WIPO Patent Application WO/2007/069556
Kind Code:
A1
Abstract:
Provided is a high-frequency modulation/demodulation multiphase rectifying device comprises a direct-coupled three-phase full-wave rectifier (3) for converting a three-phase alternating current inputted from a three-phase AC power source into a direct current, and a higher harmonic correcting circuit including three sets of ring-modulated wave power generators (7a) to (7c) disposed in parallel with the direct-coupled three-phase full-wave rectifier (3), a three-phase compound winding high-frequency multiphase conversion transformer (6), and a plurality of ring-modulated wave demodulator and auxiliary three-phase full-wave rectifiers (4a) to (4c) disposed to correspond to the phase number. The high-frequency modulation/demodulation multiphase rectifying device is characterized in that the DC outputs of the higher harmonic correcting circuit are connected in parallel with the DC outputs of the direct-coupled three-phase full-wave rectifier (3) thereby to constitute a multiphase full-wave rectifier having 6n phases (n: an integer of 3 to 7) so equivalently as viewed from the side of the three-phase AC power source. As a result, there is provided the high-frequency modulation/demodulation multiphase rectifying device which can achieve size and weight reductions, a low noise, a high efficiency and a low THD at the same time.

Inventors:
SUGAWARA ISAO (JP)
SUZUKI YASUNOBU (JP)
HONJO RYUJI (JP)
Application Number:
PCT/JP2006/324646
Publication Date:
June 21, 2007
Filing Date:
December 11, 2006
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
CHIYODA CO LTD (JP)
SUGAWARA ISAO (JP)
SUZUKI YASUNOBU (JP)
HONJO RYUJI (JP)
International Classes:
H02M7/12; H02M7/21
Foreign References:
JP2003088124A2003-03-20
JP2000354376A2000-12-19
JP2005287251A2005-10-13
JP2000050634A2000-02-18
JP2004215469A2004-07-29
JP2003304680A2003-10-24
JPS56145776A1981-11-12
Attorney, Agent or Firm:
NISHIZAWA, Toshio (11-1 Minami-Aoyama 6-chom, Minato-ku Tokyo 62, JP)
Download PDF: