Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
POWER CONVERSION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2018/198893
Kind Code:
A1
Abstract:
Provided is a power conversion system capable of reducing output waveform distortion when performing power conversion between direct current and three-phase alternating current. The power conversion system (1) is provided with a converter circuit (4) and a control circuit (6). The control circuit (6) controls high-potential side switches (Q5, Q7, Q9) of respective U-phase circuit (41), V-phase circuit (42), and W-phase circuit (43) by PWM signals. The control circuit (6) alternately switches a first modulation method and a second modulation method on a per PWM signal half-carrier basis. In the first modulation method, the control circuit (6) determines the duty ratio of the PWM signal of a phase to be a first value, said phase having the maximum phase voltage among the U-phase, the V-phase, and the W-phase. In the second modulation method, the control circuit (6) determines the duty ratio of the PWM signal of a phase to be a second value, said phase having the minimum phase voltage among the U-phase, the V-phase, and the W-phase.

Inventors:
KUSAMA, Fumito
NORISADA, Takaaki
KAMON, Yutaka
Application Number:
JP2018/015948
Publication Date:
November 01, 2018
Filing Date:
April 18, 2018
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD. (1-61, Shiromi 2-chome Chuo-ku, Osaka-sh, Osaka 07, 〒5406207, JP)
International Classes:
H02M7/48; H02M3/28
Domestic Patent References:
WO2015072036A12015-05-21
Foreign References:
JP2015061379A2015-03-30
JPH08322245A1996-12-03
JP2017028763A2017-02-02
Attorney, Agent or Firm:
HOKUTO PATENT ATTORNEYS OFFICE (Umeda Square Bldg, 9F. 1-12-17, Umeda, Kita-ku, Osaka-sh, Osaka 01, 〒5300001, JP)
Download PDF: