Title:
POWER CONVERSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2013/065512
Kind Code:
A1
Abstract:
In a system for driving an electric motor by an engine generator, the effects of the harmonics and DC voltage variations of a power converter cause increase of shaft vibration due to a phenomenon in which current ripples caused by voltage disturbances at a d-axis and a q-axis are strengthened each other and therefore a risk of increase of vibration and d-axis current due to the effect of the interference between the d-axis and the q-axis.
In a power converter (105) in an engine generator system, the d-axis voltage (Vd*) for controlling a generator (104) is adjusted by an amount of ΔVd* by a d-axis voltage adjustment means (117) so that the phase of a vibration 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 a vibration component having the same frequency included in the rotation electrical angle frequency of the generator (104). In addition, the q-axis voltage (Vq*) is adjusted by an amount of ΔVq* by a q-axis voltage adjustment means (118) so that the phase of a vibration component included in the q-axis current advances by 90 degrees or more with respect to the phase of a vibration component having the same frequency included in the rotation electrical angle frequency of the generator (104).
Inventors:
SAKAI TOSHIFUMI (JP)
NAGATA KOICHIRO (JP)
IWAJI YOSHITAKA (JP)
SHIMADA MOTOMI (JP)
NAGATA KOICHIRO (JP)
IWAJI YOSHITAKA (JP)
SHIMADA MOTOMI (JP)
Application Number:
PCT/JP2012/077226
Publication Date:
May 10, 2013
Filing Date:
October 22, 2012
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
H02P9/04; H02P21/00; H02P21/05; H02P21/14; H02P21/18; H02P21/22; H02P21/24; H02P21/28; H02P23/04; H02P23/14; H02P27/04; H02P27/08
Foreign References:
| JP2010259275A | 2010-11-11 | |||
| JP2002204596A | 2002-07-19 | |||
| JP2009303435A | 2009-12-24 | |||
| JP2007252142A | 2007-09-27 | |||
| JP2007252142A | 2007-09-27 | |||
| JP2010259275A | 2010-11-11 |
Other References:
See also references of EP 2802072A4
Attorney, Agent or Firm:
Patent Corporate Body Dai-ichi Kokusai Tokkyo Jimusho (JP)
The first international patent firm of a patent business corporation (JP)
The first international patent firm of a patent business corporation (JP)
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Claims: