Title:
電力変換装置
Document Type and Number:
Japanese Patent JP5856438
Kind Code:
B2
Abstract:
In a system for driving an electric motor by an engine generator, there is a possibility that the effects of harmonics and DC voltage fluctuations of a power converter cause shaft oscillation to increase due to a phenomenon in which current pulsations caused by voltage disturbances at a d-axis and a q-axis are strengthened each other and thus oscillation and d-axis current are increased under the effect of interference between the d-axis and the q-axis. In an engine generator system, a power converter (105) controls a generator (104) by regulating the d-axis voltage Vd* by an amount of Vd* using d-axis voltage adjusting means (117) so that the phase of an oscillating component included in the d-axis current in the rotor magnetic flux direction of the generator (104) advances by 90 degrees or more with respect to the phase of an oscillating component of the identical frequency included in the rotating electric angular frequency of the generator (104), and further by regulating the q-axis voltage Vq* by an amount of Vq* using q-axis voltage adjusting means (118) so that the phase of an oscillating component included in the q-axis current advances by 90 degrees or more with respect to the phase of an oscillating component of the identical frequency included in the rotating electric angular frequency of the generator (104).
Inventors:
Toshifumi Sakai
Koichiro Nagata
Yoshinao Iwaji
Motomi Shimada
Koichiro Nagata
Yoshinao Iwaji
Motomi Shimada
Application Number:
JP2011240255A
Publication Date:
February 09, 2016
Filing Date:
November 01, 2011
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
H02P21/00; H02P9/04; H02P21/05; H02P21/14; H02P21/18; H02P21/22; H02P21/24; H02P21/28; H02P23/04; H02P23/14; H02P27/04; H02P27/08
Domestic Patent References:
| JP2010259275A | ||||
| JP2002204596A | ||||
| JP2007252142A | ||||
| JP2009303435A |
Attorney, Agent or Firm:
Patent Business Corporation Daiichi International Patent Office