A Study on the Speed Calculation and Speed Control Based on the Induction Motor Terminal Quantities

유도 전동기 단자전압 전류에 의한 속도계산 및 속도제어에 관한 연구

The speed control system of induction motor without speed sensor is proposed in this paper. The speed of induction motor is calculated by motor terminal voltages and currents. The equations for speed calculation are derived and they are implemented on 16bit micro-processor Mc68000. The software and hardware for the Mc 68000 is developed. To prove the validity of the proposed method, the calculated speed is compared with the measured speed. The maximum speed error is nearly 1% in the overall range. The proposed speed calculation method is applied to the Current Source Inverter(CSI) fed induction motor drive system. The experimental results show the good dynamics and the resonable speed control accuracy.