Title:
CONTROL DEVICE OF PERMANENT MAGNET SYNCHRONOUS MOTOR
Document Type and Number:
Japanese Patent JP3953189
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To enable a position estimator to estimate the direction of a permanent magnet even if a phase error is outside a specific angle range, by correcting the direction of the permanent magnet being estimated by dq axis judging equipment and magnetic pole judging equipment.
SOLUTION: Dq axis judging equipment 10 corrects the output of position- judging equipment 9 so that an estimated direction θg of a permanent magnet can be advanced or delayed by 90 degrees when the size of the amplitude of d-axis voltage component vd is larger than a specific value. Also, if the average value of the d-axis voltage component vd is larger than the average value of the d-axis voltage component vd when the d-axis current component id is negative, the output of the position-estimating equipment 9 is corrected to a value where the estimated direction θg of the permanent magnet becomes an advance value, thus estimating the direction of the permanent magnet even if a position error Δθ is outside -90 degrees <Δθ<90 degrees.
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Inventors:
Shigeru Hagiwara
Yoichi Omori
Yoichi Omori
Application Number:
JP15220598A
Publication Date:
August 08, 2007
Filing Date:
May 15, 1998
Export Citation:
Assignee:
Toyo Denki Manufacturing Co., Ltd.
International Classes:
H02P1/46; H02P6/06; H02P5/00; H02P29/00; (IPC1-7): H02P6/06; H02P1/46; H02P5/00
Domestic Patent References:
| JP9215382A | ||||
| JP10094299A | ||||
| JP7245981A |
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