Title:
CONTROLLING DEVICE FOR INDUCTION MOTOR
Document Type and Number:
Japanese Patent JPS5778391
Kind Code:
A
Abstract:
PURPOSE:To render torque free from oscillation and thereby improve stability by a method wherein control of vector is performed by a method wherein a uniform control is performed of the angular frequency of slip. CONSTITUTION:The speed of a 3 phase induction motor 14 is set in a speed setter 1, and the angular frequency of slip in an angular frequency (omegas) setter 2. A torque signal T is outputted by a subtractor 3 and a torque directing current i1q obtained through a multiplier 4 and an extractor 7 of the square root is supplied to a multiplier 6. Further, an excitation directing current i1d obtained through a divider 8 and a proportional differential element 9 is supplied to an multiplier 5. Next, the sine and cosine values of the motor angular speed omega0 are fed into the multipliers 5 and 6. Then the output of the multipliers 5 and 6 are inputted into a converter 11 and base driving currents ia, ib, and ic, respective-for the three phases, are applied to a 3 phase instantaneous values controlling inverter 12.
Inventors:
KOUNO TETSUO
KOGA KUNIO
KOGA KUNIO
Application Number:
JP15268580A
Publication Date:
May 17, 1982
Filing Date:
October 30, 1980
Export Citation:
Assignee:
YASKAWA DENKI SEISAKUSHO KK
International Classes:
H02P27/02; H02P23/08; H02P27/04; (IPC1-7): H02P5/40
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