Title:
METHOD AND APPARATUS FOR CONTROLLING AN INDUCTION MOTOR
Document Type and Number:
WIPO Patent Application WO/1998/002958
Kind Code:
A2
Abstract:
In an inverter controlling method for an induction motor, the slip of the motor is detected and an optimum slip which is dependent on the motor constant and the frequency supplied to the motor providing the highest efficiency is calculated, and a voltage manipulated variable is determined from a comparison of the optimum slip and the slip of the motor, and then the voltage manipulated variable is used to form an output voltage instruction or a magnetic flux instruction so that running of the induction motor is controlled with the slip with which the highest efficiency is provided with respect to load variation and frequency variation.
Inventors:
YAMAKAWA TAKAYUKI (JP)
MIYANO TOSHIO (JP)
MIYANO TOSHIO (JP)
Application Number:
PCT/JP1997/002374
Publication Date:
January 22, 1998
Filing Date:
July 09, 1997
Export Citation:
Assignee:
YASKAWA DENKI SEISAKUSHO KK (JP)
YAMAKAWA TAKAYUKI (JP)
MIYANO TOSHIO (JP)
YAMAKAWA TAKAYUKI (JP)
MIYANO TOSHIO (JP)
International Classes:
H02P21/00; H02P27/06; H02P21/02; H02P21/05; H02P21/08; H02P21/18; H02P21/24; H02P23/02; H02P23/04; H02P23/07; H02P23/16; (IPC1-7): H02P5/41
Other References:
See references of EP 0980135A4
Attorney, Agent or Firm:
Wakabayashi, Tadashi (8th floor 9-20, Akasaka 1-chom, Minato-ku Tokyo 107, JP)
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