Zero Stator Current Frequency Operation of Speed-Sensorless Induction Motor Drives Using Stator Input Voltage Error for Speed Estimation

It is well known that the operation of a speed-sensorless induction motor drive at zero stator current frequency is unstable theoretically if signal injection is not used. In this paper, the unstable reason is analyzed. The error between the stator input voltages of the adaptive full-order observer and motor is introduced for the operation at zero stator current frequency without any signal injection. When the stator current frequency is reduced to zero, the traditional speed estimation fails to estimate the rotor speed, but the rotor speed can be estimated by the proposed stator input voltage error. The stability of the proposed method is analyzed. Although the unstable problem at zero stator current frequency can be solved by the proposed method, there is a disadvantage that an error between the estimated and actual rotor speeds is caused. Finally, the feasibility of the proposed method is verified by experiments.

[1]  Joachim Holtz,et al.  Sensorless Control of Induction Machines - With or Without Signal Injection? , 2006, IEEE Trans. Ind. Electron..

[2]  J. Luomi,et al.  Flux observer enhanced with low-frequency signal injection allowing sensorless zero-frequency operation of induction motors , 2003, 38th IAS Annual Meeting on Conference Record of the Industry Applications Conference, 2003..

[3]  Sensorless Sliding-Mode Rotor Speed Observer of Induction Machines Based on Magnetizing Current Estimation , 2014, IEEE Transactions on Industrial Electronics.

[4]  R. D. Lorenz,et al.  Dynamic loss minimization using improved deadbeat-direct torque and flux control for interior permanent magnet synchronous machines , 2012, 2012 IEEE Energy Conversion Congress and Exposition (ECCE).

[5]  Ivo Herman,et al.  AC Drive Observability Analysis , 2013, IEEE Transactions on Industrial Electronics.

[6]  Kouki Matsuse,et al.  Regenerating-mode low-speed operation of sensorless induction motor drive with adaptive observer , 2002 .

[7]  Damian Giaouris,et al.  Controlled AC Electrical Drives , 2008, IEEE Transactions on Industrial Electronics.

[8]  Shinji Doki,et al.  New approach for stability improvement of speed-sensorless induction-motor controls at zero frequency using multirate adaptive observer , 2006 .

[9]  Marko Hinkkanen,et al.  Reduced-order flux observers with stator-resistance adaptation for speed-sensorless induction motor drives , 2009, 2009 IEEE Energy Conversion Congress and Exposition.

[10]  Jan Melkebeek,et al.  Speed sensorless direct torque control of induction motors using an adaptive flux observer , 1999, Conference Record of the 1999 IEEE Industry Applications Conference. Thirty-Forth IAS Annual Meeting (Cat. No.99CH36370).

[11]  T. Sutikno,et al.  An Improved FPGA Implementation of Direct Torque Control for Induction Machines , 2013, IEEE Transactions on Industrial Informatics.

[12]  Somboon Sangwongwanich,et al.  Stability and Dynamic Performance Improvement of Adaptive Full-Order Observers for Sensorless PMSM Drive , 2012, IEEE Transactions on Power Electronics.

[13]  M. Cirrincione,et al.  Neural sensorless control of linear induction motors by a full-order Luenberger observer considering the end-effects , 2012, 2012 IEEE Energy Conversion Congress and Exposition (ECCE).

[14]  Dianguo Xu,et al.  Design Method of Adaptive Full Order Observer With or Without Estimated Flux Error in Speed Estimation Algorithm , 2016, IEEE Transactions on Power Electronics.

[15]  Surapong Suwankawin,et al.  A speed-sensorless IM drive with decoupling control and stability analysis of speed estimation , 2002, IEEE Trans. Ind. Electron..

[16]  L. Harnefors,et al.  Comparison of a Reduced-Order Observer and a Full-Order Observer for Sensorless Synchronous Motor Drives , 2012, IEEE Transactions on Industry Applications.

[17]  Marko Hinkkanen,et al.  Parameter sensitivity of full-order flux observers for induction motors , 2002 .

[18]  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.

[19]  Surapong Suwankawin,et al.  Design strategy of an adaptive full-order observer for speed-sensorless induction-motor Drives-tracking performance and stabilization , 2006, IEEE Transactions on Industrial Electronics.

[20]  Murat Barut,et al.  Speed-Sensorless Estimation for Induction Motors Using Extended Kalman Filters , 2007, IEEE Transactions on Industrial Electronics.

[21]  S. A. Davari,et al.  Using Full Order and Reduced Order Observers for Robust Sensorless Predictive Torque Control of Induction Motors , 2012, IEEE Transactions on Power Electronics.

[22]  Mark Sumner,et al.  Sensorless control of induction Machines at zero and low frequency using zero sequence currents , 2006, IEEE Transactions on Industrial Electronics.

[23]  M. Pucci,et al.  A new TLS-based MRAS speed estimation with adaptive integration for high-performance induction machine drives , 2004, IEEE Transactions on Industry Applications.

[24]  Yuan Ren,et al.  Direct Torque Control of Permanent-Magnet Synchronous Machine Drives With a Simple Duty Ratio Regulator , 2014, IEEE Transactions on Industrial Electronics.

[25]  Mark Sumner,et al.  Comparative analysis of experimental performance and stability of sensorless induction motor drives , 2006, IEEE Transactions on Industrial Electronics.

[26]  Toni Tuovinen,et al.  Adaptive full-order observer with high-frequency signal injection for synchronous reluctance motor drives , 2014, 2013 International Electric Machines & Drives Conference.