CONTROL APPARATUS FOR AC MOTOR AND ELECTRIC VEHICLE

Title:

CONTROL APPARATUS FOR AC MOTOR AND ELECTRIC VEHICLE

Document Type and Number:

WIPO Patent Application WO/2010/082368

Kind Code:

A1

Abstract:

An AC motor (M1), an inverter (14), and a control apparatus (30) are installed in an electric vehicle. The control apparatus (30) includes a voltage difference computing section (320), a modulation factor computing section (340), and a mode change determining section (360). The voltage difference computing section (320) computes the difference between the voltage determined by a first voltage command in executing rectangular wave voltage control and the voltage determined by a second voltage command in executing pulse width modulation control. The modulation factor computing section (340) computes the modulation factor according to the first voltage command and the voltage difference by substituting a current difference into the voltage equation of the AC motor. The mode change determining section (360) determines on the basis of the modulation factor whether or not it is necessary to change the control mode of the AC motor (M1) from the rectangular wave voltage control to the pulse width modulation control.

Inventors:

YAMADA KENJI (JP)
YAMAKAWA TOSHIFUMI (JP)
OONO TOSHIKAZU (JP)
KUROMATSU YUTAKA (JP)

Application Number:

PCT/JP2009/053148

Publication Date:

July 22, 2010

Filing Date:

February 23, 2009

Export Citation:

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Assignee:

TOYOTA MOTOR CO LTD (JP)
YAMADA KENJI (JP)
YAMAKAWA TOSHIFUMI (JP)
OONO TOSHIKAZU (JP)
KUROMATSU YUTAKA (JP)

International Classes:

H02P21/00; B60L9/18; H02P23/07; H02P25/022; H02P25/026; H02P27/04; H02P27/08

Foreign References:

JP2007306699A	2007-11-22
JP2008253000A	2008-10-16
JP2008236853A	2008-10-02
JP2007306699A	2007-11-22

Other References: