Title:
CONTROLLER FOR INDUCTION MOTOR
Document Type and Number:
Japanese Patent JPS58195487
Kind Code:
A
Abstract:
PURPOSE:To improve the responding characteristics of an induction motor by correcting the errors of a current reference signal and a control current due to the delay in the response of a current control system, thereby accurately controlling the current. CONSTITUTION:A current control system simulation circuit 28 inputs a primary frequency reference signal, and outputs as a delay phase angle signal the delay phase angle due to the current control. This signal is inverted in its polarity by a polarity switching circuit 35 in accordance with the output signal from a polarity discriminator 34 which discriminates the positive or negative of the torque reference signal. A current reference signal multiplier 30 inputs the primary reference signal which is compensated by dividing by a divider 36 the primary frequency reference signal and the primary current reference signal outputted from an induction motor simulation circuit 24 by an attenuation rate signal outputted from the current control system simulation circuit 28, and outputs the primary current reference signal multiplied by the both signals. A current control circuit 31' outputs a phase control signal to a phase control circuit 32.
Inventors:
KUGE KATSUTAROU
Application Number:
JP7663682A
Publication Date:
November 14, 1983
Filing Date:
May 10, 1982
Export Citation:
Assignee:
TOKYO SHIBAURA ELECTRIC CO
International Classes:
H02P21/00; H02P21/14; H02P21/18; H02P21/22; H02P21/24; H02P23/07; H02P23/08; H02P23/14; H02P23/16; H02P27/04; (IPC1-7): H02P5/34
Attorney, Agent or Firm:
Noriyuki Noriyuki