A fully digital control of a field oriented induction motor drive using flux observer with and without speed sensor-600 Hz switching frequency case

A field-oriented control method based on a predictive observer with a 600 Hz switching frequency current regulation of the induction motor, with and without speed and voltage sensors, is proposed. Measuring only stator currents and estimating motor speed and rotor fluxes by a predictive state observer with variable pole selection, the stator currents are controlled to be exactly equal to the reference currents at every sampling instant. As a result, the current and torque ripples are reduced, and the speed and rotor fluxes are estimated with low sensitivity to parameter variation. As a result, only current sensors are used for the implementation of the system drive. Simulation and experimental results demonstrated the superiority of the proposed method over the conventional schemes.<<ETX>>

[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]  T.G. Habetler,et al.  Control strategies for direct torque control using discrete pulse modulation , 1989, Conference Record of the IEEE Industry Applications Society Annual Meeting,.

[3]  X. Xu,et al.  A stator flux oriented induction machine drive , 1988, PESC '88 Record., 19th Annual IEEE Power Electronics Specialists Conference.

[4]  H. Nakano,et al.  Sensor less field oriented control of an induction motor using an instantaneous slip frequency estimation method , 1988, PESC '88 Record., 19th Annual IEEE Power Electronics Specialists Conference.

[5]  A. Kawamura,et al.  Digital current regulation of field oriented controlled induction motor based on predictive flux observer , 1990, Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting.