Discrete-time AC motor control apparatus

Details Discrete-time AC motor control apparatus Discrete-time AC motor control apparatus

1990-06-27

1991-10-15

Ip, Paul

Electricity: motive power systems

Positional servo systems

With stabilizing features

318615, 318561, 318800, 318803, G05B 501, H02P 540

Patent

active

050577590

ABSTRACT:
In a discrete-time alternating-current motor control apparatus having a state estimation observer estimating a rotor angle and a rotor angular velocity based on a direct quadrature transformation model of the motor, the gain of the observer is changed over depending on an estimated angular velocity. As a result, the apparatus is applicable in a wide range of the motor speed.
Furthermore, the phase difference between the winding voltages and the winding currents supplied to the state estimation observer is compensated depending on the estimated angular velocity, thereby improving the control accuracy.

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Lawrence A. Jones, Jeffery H. Lang "A State Observer for the Permanent-Magnet Synchronous Motor" IECON 1987 Conference, Cambridge, MA, Nov. 2-6, 1987.
Yoshihiro Ueda, Takaaki Yamada "A State Observer for the Permanent Magnet Synchronous Motor with Inductance Variations and its Characteristics" Proceedings of the 33rd Ann. Conf. of the Inst. of Systems, ISCIE, 1989.

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