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Title:
CONTROLLER FOR PERMANENT MAGNET TYPE SYNCHRONOUS MOTOR
Document Type and Number:
Japanese Patent JP2009273254
Kind Code:
A
Abstract:

To enable correct calculation of a magnetic pole position by applying a high-frequency current of a proper magnitude when applying a high-frequency alternating voltage to a permanent magnet type synchronous motor.

The controller is provided with: a d-axis high frequency current control means having a bandpass filter 24 for detecting the amplitudes of a and -axis high-frequency currents; a Fourier series calculator 31 for detecting a component pulsing at 180 cycle of an electric angle from the -axis high-frequency current amplitude and detecting the amplitude of a d-axis high-frequency current; a high-frequency current adjuster 32 for calculating a first -axis high-frequency voltage amplitude command value Vh** so that the detected value of the d-axis high-frequency current amplitude may match the d-axis high-frequency current amplitude command value; and a control constant calculator 33 for calculating a second -axis high frequency voltage amplitude command value Vh* for calculating a high frequency voltage to be applied to the electric motor 80 from the first -axis high-frequency voltage amplitude command value Vh** and calculating an angle error calculating gain Kerr from a ripple component of the detected value of the -axis high-frequency current amplitude.


Inventors:
NOMURA HISAFUMI
MATSUMOTO YASUSHI
ITOIGAWA NOBUO
Application Number:
JP2008122231A
Publication Date:
November 19, 2009
Filing Date:
May 08, 2008
Export Citation:
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Assignee:
FUJI ELECTRIC SYSTEMS CO LTD
International Classes:
H02P6/18; H02P6/06; H02P6/08; H02P6/182; H02P6/28; H02P21/00; H02P21/14; H02P21/22; H02P23/14; H02P27/04; H02P27/06; H02P27/08
Domestic Patent References:
JPH10323099A1998-12-04
JP2007060899A2007-03-08
JP2007124835A2007-05-17
Attorney, Agent or Firm:
森田 雄一