Title:
HIGH-PERFORMANCE SPEED CONTROLLING CIRCUIT FOR MULTIPHASE INDUCTION MOTOR BASED ON DETECTION OF ONLY CURRENT
Document Type and Number:
Japanese Patent JPH01114394
Kind Code:
A
Abstract:
PURPOSE:To accomplish high-performance operation without a speed detecting added device, by detecting motor current only, and by computing the slip angle speed of the space vector of magnetic flux. CONSTITUTION:By a current detector 100, the scale I of the electromagnetic vector I' of a three-phase induction motor 1 and an electric rotation angle thetaphi+delta for a reference axis are detected. By an arithmetic unit 101, to the specified scale (PSI0) of a magnetic flux vector (PSI), the absolute value ¦omegaS¦ of the slip electric-angle speed of the magnetic flux vector PSI is determined. The actual value omegagamma of a rotor electric-angle speed is obtained by subtracting the slip electric-angle speed omegaS from the electric angle speed omegaphi of the magnetic flux vector PSI with an adder 106.
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Inventors:
MATSUMOTO HISAO
TAKAMI HIROSHI
TAKAMI HIROSHI
Application Number:
JP26841287A
Publication Date:
May 08, 1989
Filing Date:
October 24, 1987
Export Citation:
Assignee:
MATSUMOTO HISAO
TAKAMI HIROSHI
TAKAMI HIROSHI
International Classes:
H02P27/04; H02M7/48; H02P21/18; H02P21/24; H02P23/07; H02P23/16; H02P27/08; (IPC1-7): H02P7/628
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