Apparatus and method for controlling torque of induction motor t

Details Apparatus and method for controlling torque of induction motor t Apparatus and method for controlling torque of induction motor t

1997-02-13

1998-09-22

Ro, Bentsu

Electricity: motive power systems

Induction motor systems

Primary circuit control

318805, 318812, H02P 2100

Patent

active

058119566

ABSTRACT:
In apparatus and method for controlling a torque of an induction motor through a vector control method type inverter having a slip frequency calculator arranged for calculating a slip frequency used to perform a vector control for the induction motor and a secondary resistance compensation circuit arranged for correcting the slip frequency by a temperature variation in a secondary resistance of the induction motor, basically a skin effect correction circuit is added for deriving an error component developed in an output of the secondary resistance compensation circuit when a leakage inductance L.sigma.is non-linearly varied due to a skin effect phenomenon.

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patent: 5155797 (1992-10-01), Nomura et al.
patent: 5341081 (1994-08-01), Yamada
patent: 5481173 (1996-01-01), Yamamoto
M. Akbaba, et al., "Improved estimation of induction machine parameters", Electric Power Systems Research, vol. 34, pp. 65-73, 1995.
Patent Abstract of JP 01 209980, Iwata Kazutoshi, Toshiba Corporation,"Secondary Circuit Constant Arithmetic Device", Aug. 23, 1989.
Patent Abstract of JP 06 153568, Mizuno Takayuki, Meidensha Corporation, "Method for Measuring Constant of Induction Motor", May 31, 1994.
T.J. White, et al., "Improved Dynamic Performance of the 3-Phase Induction Motor Using Equivalent Circuit Parameter Correction", IEE Control '94, pp. 1210-1214, 1994.
Patent Abstract of JP 06 086581, Yamada Tetsuo, et al., Meidensha Corporation, "Compensating Method for Fluctuation in Parameter", Mar. 25, 1994.

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