Title:
CONTROLLER AND CONTROL METHOD FOR INDUCTION MOTOR AND AIR-CONDITIONER WITH ITS CONTROLLER
Document Type and Number:
Japanese Patent JP3213763
Kind Code:
B2
Abstract:
PURPOSE: To stabilize the control of induction motor by suppressing the fluctuation of flux upon abrupt change of speed command or load.
CONSTITUTION: A component current detecting means 4 detects primary current of an induction motor while separating into torque current component and exciting current component. First correcting means 13, 14, 15 correct a frequency command based on the variation rate of torque current component. Second correcting means 16, 17, 18 further correct thus corrected frequency command based on the variation rate of exciting current component. The second correcting means 16, 17, 18 control output voltage, frequency and phase of an inverter to suppress the fluctuation of the exciting current component thus suppressing instable phenomenon due to the fluctuation of flux with no sacrifice of response.
Inventors:
Seiji Ishida
Takahashi Shizuo
Noboru Fujimoto
Tsunehiro Endo
Masaya Taniguchi
Takahashi Shizuo
Noboru Fujimoto
Tsunehiro Endo
Masaya Taniguchi
Application Number:
JP1138592A
Publication Date:
October 02, 2001
Filing Date:
January 24, 1992
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
F24F11/02; F24F11/49; F24F11/62; F24F11/86; H02P21/00; H02P23/07; H02P27/04; H02P27/06; H02P27/08; F24F140/00; (IPC1-7): H02P21/00; F24F11/02; H02P5/41
Domestic Patent References:
| JP2276490A | ||||
| JP63144784A | ||||
| JP57196887A |
Attorney, Agent or Firm:
Tatsuyuki Unuma