Title:
DEVICE FOR CONTROLLING ELECTRIC MOTOR
Document Type and Number:
WIPO Patent Application WO/2011/135687
Kind Code:
A1
Abstract:
In the disclosed device, each of a first inverter and a second inverter are controlled by means of pulse-width modulation that uses a carrier signal. In order to reduce noise resulting from the first inverter and the second inverter, the frequency (f1) of the carrier signal of the first inverter and the frequency (f2) of the carrier signal of the second inverter are controlled. The frequency (f1) of the carrier signal of the first inverter is randomly or cyclically altered within a pre-set first frequency range (420) in accordance with the passage of time. The frequency (f2) of the carrier signal of the second inverter is randomly or cyclically altered within a pre-set second frequency range (430) in accordance with the passage of time in a manner so as to not overlap the first frequency range (420).
Inventors:
KIKUNAGA ATSUSHI (JP)
HATTORI HIROYUKI (JP)
HATTORI HIROYUKI (JP)
Application Number:
PCT/JP2010/057548
Publication Date:
November 03, 2011
Filing Date:
April 28, 2010
Export Citation:
Assignee:
TOYOTA MOTOR CO LTD (JP)
KIKUNAGA ATSUSHI (JP)
HATTORI HIROYUKI (JP)
KIKUNAGA ATSUSHI (JP)
HATTORI HIROYUKI (JP)
International Classes:
H02P5/74; H02P5/46
Foreign References:
| JPH02211092A | 1990-08-22 | |||
| JP2009303288A | 2009-12-24 | |||
| JP2007020320A | 2007-01-25 | |||
| JP2004312922A | 2004-11-04 | |||
| JP2008099475A | 2008-04-24 | |||
| JP2008005625A | 2008-01-10 |
Attorney, Agent or Firm:
FUKAMI, Hisao et al. (JP)
Hisao Fukami (JP)
Hisao Fukami (JP)
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Claims:
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