Title:
CONTROLLER FOR INDUCTION MOTOR
Document Type and Number:
Japanese Patent JP3307122
Kind Code:
B2
Abstract:
PURPOSE: To reduce a peak current to a minimum at the rise of torque and lower a current promptly at the fall of torque, by optimizing a cut-off frequency for a target-torque transfer function and a target magnetic-flux transfer function in a changing direction of the target torque.
CONSTITUTION: A stationary loss minimum flux calculating unit 11, a target flux calculating unit 12, a target torque calculating unit 14, a target torque change detecting unit 18, and a cut-off frequency setting unit 19 are provided in addition to conventional vector control units 13, and 15 to 17. In a control system, torque responsibility and flux responsibility are changeable independently. The cut-off frequency (ωγ) of a target torque transfer function and a cut-off frequency (ω&phiv ) of a target flux transfer function are adequately optimized in a changing direction of the target torque (Tm). Then, a loss in transient time is optimized under control, and a peak current at the rise of torque is reduced to a minimum and a torque current or induction current is reduced promptly at the fall of torque.
Inventors:
Yoshinori Yamamura
Yasutake Ishikawa
Kazuma Okura
Yasuhiko Kitajima
Yasutake Ishikawa
Kazuma Okura
Yasuhiko Kitajima
Application Number:
JP28469694A
Publication Date:
July 24, 2002
Filing Date:
November 18, 1994
Export Citation:
Assignee:
Nissan Motor Co., Ltd
International Classes:
B60L9/18; H02P21/00; H02P21/13; H02P21/14; H02P21/18; H02P21/20; H02P21/22; H02P21/24; H02P21/28; H02P23/07; H02P23/14; H02P23/16; H02P27/04; (IPC1-7): H02P21/00; B60L9/18
Domestic Patent References:
| JP223085A | ||||
| JP6084903A | ||||
| JP767398A |
Attorney, Agent or Firm:
Junnosuke Nakamura (1 outside)