Title:
CONTROL METHOD AND CONTROLLER OF PM MOTOR
Document Type and Number:
Japanese Patent JP3687590
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To estimate the pole phase at a high speed without using an FFT while reducing estimation phase error due to noise in the control of a PM motor.
SOLUTION: An integrator 21 and a high frequency voltage generating section 22 obtain a sinusoidal single oscillation high frequency voltage from a high frequency angular speed command and the high frequency voltage is injected to the voltage command of dc-axis. High frequency extracting sections 23 and 24 extract the high frequency current component contained in the dc-axis and qc-axis currents. A positive phase map operating section 25 and a negative phase map operating section 26 obtain the maps for the positive phase axis and the negative phase axis of the high frequency current component thus extracted. A positive/negative phase asymmetry extracting section 27 obtains the asymmetry of two maps as a feature amount. A phase estimating section 28 determines an estimated phase θc from the feature amount.
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Inventors:
Yasuhiro Yamamoto
Application Number:
JP2001348156A
Publication Date:
August 24, 2005
Filing Date:
November 14, 2001
Export Citation:
Assignee:
KABUSHIKI KAISHA MEIDENSHA
International Classes:
H02P27/04; H02P6/06; H02P6/08; H02P6/16; H02P6/18; H02P6/28; H02P21/00; H02P21/14; H02P21/18; H02P21/22; H02P21/24; H02P23/14; H02P23/16; H02P25/026; (IPC1-7): H02P6/16; H02P21/00
Domestic Patent References:
| JP7245981A | ||||
| JP62138074A | ||||
| JP4359691A | ||||
| JP2001169590A |
Attorney, Agent or Firm:
Tsuyoshi Hashimoto
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