Title:
CONTROL APPARATUS AND CONTROL METHOD FOR MOTOR
Document Type and Number:
WIPO Patent Application WO/2011/148485
Kind Code:
A1
Abstract:
An inverter for driving a motor installed in an electrically driven vehicle is controlled by pulse width modulation that uses a carrier signal. At normal times, the carrier frequency (f1) of the inverter is changed periodically or at random in accordance with the time elapsed, within a preset first frequency range (420), in order to reduce electromagnetic noise. At low vehicle speeds, the carrier frequency (f1) is changed periodically or at random in accordance with the time elapsed, within a second frequency range (430) that is set to be wider than the first frequency range (420), and the center frequency (fa) of which is equivalent to that of the first frequency range (420). The second frequency range (430) is set so as to contain therein a resonance frequency (frm) of a particular mechanical vibration system the electromagnetic noise of which to be generated at a natural resonance frequency thereof is great, from among a plurality of mechanical vibration systems formed by apparatuses installed in the electrically driven vehicle. Meanwhile, the first frequency range (420) is set so as not to contain the resonance frequency (frm).
Inventors:
OSUGI RYOSUKE (JP)
Application Number:
PCT/JP2010/058976
Publication Date:
December 01, 2011
Filing Date:
May 27, 2010
Export Citation:
Assignee:
TOYOTA MOTOR CO LTD (JP)
OSUGI RYOSUKE (JP)
OSUGI RYOSUKE (JP)
International Classes:
H02P27/06; B60L50/16
Domestic Patent References:
| WO2010023768A1 | 2010-03-04 |
Foreign References:
| JP2005278281A | 2005-10-06 |
Other References:
See also references of EP 2579451A4
Attorney, Agent or Firm:
FUKAMI, Hisao et al. (JP)
Hisao Fukami (JP)
Hisao Fukami (JP)
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Claims: