A speed calculation method for induction motor based on voltage decoupling control principle

A new simplified equivalent model of an induction motor is proposed in this paper, which is derived from the voltage decoupling control principle of induction motors. The model consists of two subsystems, the rotor flux and torque current subsystems, and is identical to that of a DC motor. According to this model, a speed calculation method is presented for a speed sensorless vector-controlled induction motor drive system, which uses integration of the difference between the command of torque current and the torque component of stator current. The validity of the proposed method is verified by computer simulation results.

[1]  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,.

[2]  Lazhar Ben-Brahim,et al.  A fully digitized field-oriented controlled induction motor drive using only current sensors , 1992, IEEE Trans. Ind. Electron..

[3]  E. Bassi,et al.  An user-oriented system for automatic tuning and control for electrical drives , 1994, Proceedings of 1994 IEEE International Symposium on Industrial Electronics (ISIE'94).

[4]  Kouhei Ohnishi,et al.  Decoupling Control of Secondary Flux and Secondary Current in Induction Motor Drive with Controlled Voltage Source and Its Comparison with Volts/Hertz Control , 1985, IEEE Transactions on Industry Applications.