Sensorless field oriented control using common mode currents

A simple sensorless field oriented control technique of an induction motor drive is presented, that estimates the angular frequency of the main flux from common mode currents. The proposed technique is effective at any load level and any speed, ranging from zero to rated value and beyond, in the flux weakening region. Moreover, no motor parameter estimation procedures are required, neither additional sensors, nor the availability of the motor neutral point. The consistency of the proposed technique is practically evaluated by experimental results obtained on a standard induction motor drive.

[1]  Thomas A. Lipo,et al.  Flux Tracking Methods for Direct Field Orientation , 1999 .

[2]  A. Vandenput,et al.  Sensorless direct field orientation at zero flux frequency , 1996, IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting.

[3]  Robert D. Lorenz,et al.  Transducerless field orientation concepts employing saturation-induced saliencies in induction machines , 1995, IAS '95. Conference Record of the 1995 IEEE Industry Applications Conference Thirtieth IAS Annual Meeting.

[4]  Alfio Consoli,et al.  Induction motor modeling for common mode and differential mode emission evaluation , 1996, IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting.

[5]  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.

[6]  Alfio Consoli,et al.  A new zero frequency flux position detection approach for direct field oriented control drives , 1999, Conference Record of the 1999 IEEE Industry Applications Conference. Thirty-Forth IAS Annual Meeting (Cat. No.99CH36370).

[7]  M. Stiebler,et al.  Detection of the rotor position of a permanent‐magnet synchronous motor at standstill , 1999 .

[8]  A. Consoli,et al.  Low and zero speed sensorless control of synchronous reluctance motors , 1998, Conference Record of 1998 IEEE Industry Applications Conference. Thirty-Third IAS Annual Meeting (Cat. No.98CH36242).