Sensorless speed control of an induction motor with no influence of resistance variation

Many speed sensorless vector control systems of induction motors have been developed. However, the speed control characteristics are affected by machine temperature variations, because these methods use the primary and the secondary resistance value to estimate the rotor speed. This paper describes the method of the primary and the secondary resistance estimation for speed sensorless control systems. The primary resistance estimation uses the secondary flux which is calculated by the instantaneous reactive power. On the other hand, the secondary resistance is directly calculated by the line voltage and the current without speed sensors. This method is possible on the PWM inverter fed induction motor. By combining these two methods, the speed control characteristic is robust to the machine temperature variations. The feasibility of these methods was verified by some simulation and experimental results. In the tested system, the compensation of the primary and the secondary resistance mismatching is achieved.

[1]  Fang Zheng Peng,et al.  Low-speed performance of robust speed identification using instantaneous reactive power for tacholess vector control of induction motors , 1994, Proceedings of 1994 IEEE Industry Applications Society Annual Meeting.

[2]  Seung-Ki Sul,et al.  Speed sensorless vector control of induction motor using extended Kalman filter , 1994 .

[3]  M. Depenbrock,et al.  Direct self control of inverter-fed induction machine, a basis for speed control without speed-measurement , 1989, Conference Record of the IEEE Industry Applications Society Annual Meeting,.

[4]  Robert D. Lorenz,et al.  Transducerless position and velocity estimation in induction and salient AC machines , 1994, Proceedings of 1994 IEEE Industry Applications Society Annual Meeting.

[5]  K. Matsuse,et al.  Speed sensorless field oriented control of induction motor with rotor resistance adaptation , 1993, Conference Record of the 1993 IEEE Industry Applications Conference Twenty-Eighth IAS Annual Meeting.

[6]  C. Schauder,et al.  Adaptive speed identification for vector control of induction motors without rotational transducers , 1989, Conference Record of the IEEE Industry Applications Society Annual Meeting,.

[7]  T. Kanmachi,et al.  Sensor-less speed control of an induction motor with no influence of secondary resistance variation , 1993, Conference Record of the 1993 IEEE Industry Applications Conference Twenty-Eighth IAS Annual Meeting.

[8]  Seung-Ki Sul,et al.  Speed sensorless vector control of an induction motor using an extended Kalman filter , 1992, Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting.