Title:
CONTROL METHOD AND CONTROLLER FOR POWER CONVETER
Document Type and Number:
Japanese Patent JP3446348
Kind Code:
B2
Abstract:
PURPOSE: To compensate the response delay of a DC current and minimize the ripple of DC voltage so as to use a smoothing capacitor of smaller value by quickening the response control from the current controller of the converter performing normal conversion to the current ripple on the DC side of the converter performing reverse conversion, more than the current controller of the converter.
CONSTITUTION: A smoothing capacitor 6 is connected between the terminals of a converters 1 and 4, and both converters 1 and 4 are controlled by current controllers 10 and 15 which control several AC currents. The response control from the current controller 10 of the converter 1 performing normal conversion to the current ripple on AC side of the converter 4 performing reverse conversion is quickened more than the current controller 15 of the converter 4 performing reverse conversion. Hereby, the AC current of the converter performing normal conversion is controlled prior to that of the converter 4 performing reverse conversion. Accordingly, the response delay of the DC current is compensated, and the DC voltage ripple is minimized, whereby the capacity of the smoothing capacitor 6 can be reduced.
Inventors:
Toshiaki Okuyama
Takashi Ikun
Yoshinao Iwaji
Takashi Ikun
Yoshinao Iwaji
Application Number:
JP28312094A
Publication Date:
September 16, 2003
Filing Date:
November 17, 1994
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
H02M7/48; H02M7/72; H02P27/06; (IPC1-7): H02M7/72; H02M7/48; H02P5/41
Domestic Patent References:
| JP3128691A | ||||
| JP3190594A |
Attorney, Agent or Firm:
Yasuo Sakuta