Title:
SPEED CONTROLLER OF INDUCTION MOTOR
Document Type and Number:
Japanese Patent JPS60197183
Kind Code:
A
Abstract:
PURPOSE:To generate a stable motor torque by decreasing an exciting current component command value in response to the decrease in the voltage of a power source or the input voltage of an inverter, thereby obtaining the margin of the output voltage of the inverter to reliably control a vector. CONSTITUTION:A converter output voltage Vdc is detected by a voltage detector 111. If the voltage Vdc is low, an exciting current component command value 112a is limited to a low value. Accordingly, since the primary voltage command values 30a-30c may be low value, a voltage necessary to flow an exciting current component signal in response to the value 112a can be obtained even if the output voltage Vdc decreases, thereby preferably controlling a vector.
Inventors:
MASAKI TAKANOBU
SUGIMOTO HIDEHIKO
SUGIMOTO HIDEHIKO
Application Number:
JP5310984A
Publication Date:
October 05, 1985
Filing Date:
March 19, 1984
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
H02P21/00; H02P21/22; H02P23/07; H02P23/08; H02P23/16; H02P27/04; H02P27/08; (IPC1-7): H02P5/41
Attorney, Agent or Firm:
Masuo Oiwa
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