Controller Design of Sensorless Induction Machine by High Frequency Voltage Injection

This paper describes a new sensorless induction motor drive scheme by injecting high frequency voltage signal. The signal is not a rotating one, but a fluctuating one at a synchronous rotating reference frame with the fundamental stator frequency. The difference of impedance between the flux axis and the quadrature axis at high frequency signal injection on the rotor flux angle is used to track the rotor flux angle. Since the injection signal is independent on the stator frequency, the monitoring of the differences of impedance can be done even at stand still condition of motor. Speed and current controller suitable for high frequency voltage injection are designed and verified by experiments.

[1]  M. Depenbrock,et al.  Direct self-control (DSC) of inverter-fed induction machine , 1988 .

[2]  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,.

[3]  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.

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

[5]  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.

[6]  Jung-Ik Ha,et al.  Sensorless field orientation control of an induction machine by high frequency signal injection , 1997, IAS '97. Conference Record of the 1997 IEEE Industry Applications Conference Thirty-Second IAS Annual Meeting.