Sensorless vector controllers for induction motor drives

The development and implementation of sensorless vector controllers based on stator flux-oriented control (SFOC) and rotor flux-oriented control (RFOC) are presented. For flux estimation, instead of measuring phase voltages directly or estimating phase voltages indirectly using switching states and DC link voltage, the voltage command for inverter control is used and therefore only current sensors are required. The effect of dead time on speed control at low speed range is highlighted and the details of dead time compensation are presented. Simulation results from a model-based computer-aided design approach using Simulink, and experimental results are presented to confirm the theoretical analysis and hardware design.

[1]  T. Ohtani,et al.  Vector control of induction motor without shaft encoder , 1989, Conference Record of the IEEE Industry Applications Society Annual Meeting,.

[2]  G. Yang,et al.  Adaptive speed identification scheme for vector controlled speed sensor-less inverter-induction motor drive , 1991, Conference Record of the 1991 IEEE Industry Applications Society Annual Meeting.

[3]  Robert Joetten,et al.  Control Methods for Good Dynamic Performance Induction Motor Drives Based on Current and Voltage as Measured Quantities , 1983, IEEE Transactions on Industry Applications.

[4]  Tadashi Fukao,et al.  Robust speed identification for speed sensorless vector control of induction motors , 1993, Conference Record of the 1993 IEEE Industry Applications Conference Twenty-Eighth IAS Annual Meeting.

[5]  X. Xu,et al.  Implementation of direct stator flux orientation control on a versatile DSP based system , 1990, Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting.

[6]  R. C. Dodson,et al.  Compensating for dead time degradation of PWM inverter waveforms , 1990 .

[7]  Gene F. Franklin,et al.  Digital control of dynamic systems , 1980 .

[8]  H. Kubota,et al.  DSP-based speed adaptive flux observer of induction motor , 1991, Conference Record of the 1991 IEEE Industry Applications Society Annual Meeting.

[9]  Thomas A. Lipo,et al.  A New Approach to Flux and Torque-Sensing in Induction Machines , 1986, IEEE Transactions on Industry Applications.

[10]  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,.

[11]  Yoshihiro Murai,et al.  Waveform Distortion and Correction Circuit for PWM Inverters with Switching Lag-Times , 1987, IEEE Transactions on Industry Applications.