Compensation of position estimation error for precise position-sensorless control of IPMSM based on high-frequency pulsating voltage injection

This paper proposes a compensation method for precise position-sensorless control using high-frequency pulsating voltage injection and the criterion for applicability of the proposed compensation method is discussed. Theoretical background of the proposed 3-dimensional compensation table as well as the implementation method is described and it is disclosed that the real rotor position and the convergent position should have one-to-one relationship for precise estimation of the rotor position. Also, in the proposed method, additional compensation for inductance harmonics or voltage distortion is not needed, since they are all reflected in the pre-commissioned table. Experimental results including speed and position control validate the proposed compensation method maintaining the position error within ±2°E at all load conditions and rotor positions.

[1]  Robert D. Lorenz,et al.  Transducerless position and velocity estimation in induction and salient AC machines , 1994, Proceedings of 1994 IEEE Industry Applications Society Annual Meeting.

[2]  Mark Sumner,et al.  Analysis and suppression of high-frequency inverter modulation in sensorless position-controlled induction machine drives , 2003 .

[3]  S. Sul,et al.  Sensorless drive of surface-mounted permanent-magnet motor by high-frequency signal injection based on magnetic saliency , 2003 .

[4]  D. Stone,et al.  Improved Rotor Position Estimation by Signal Injection in Brushless AC Motors, Accounting for Cross-Coupling Magnetic Saturation , 2007, 2007 IEEE Industry Applications Annual Meeting.

[5]  G Pellegrino,et al.  Accurate Inverter Error Compensation and Related Self-Commissioning Scheme in Sensorless Induction Motor Drives , 2010, IEEE Transactions on Industry Applications.

[6]  Kozo Ide,et al.  High bandwidth sensorless algorithm for AC machines based on square-wave type voltage injection , 2009, 2009 IEEE Energy Conversion Congress and Exposition.

[7]  Z Q Zhu,et al.  A Novel Method for Compensating Inverter Nonlinearity Effects in Carrier Signal Injection-Based Sensorless Control From Positive-Sequence Carrier Current Distortion , 2011, IEEE Transactions on Industry Applications.

[8]  Daniel Edward Salt,et al.  Compensation of Inverter Nonlinear Distortion Effects for Signal-Injection-Based Sensorless Control , 2011, IEEE Transactions on Industry Applications.

[9]  S. Sul,et al.  PWM switching frequency signal injection sensorless method in IPMSM , 2011, 2011 IEEE Energy Conversion Congress and Exposition.

[10]  Seung-Ki Sul,et al.  Improved design of IPMSM for sensorless drive with absolute rotor position estimation capability , 2016, 2014 IEEE 5th International Symposium on Sensorless Control for Electrical Drives.

[11]  Sungho Jung,et al.  Analog Filtering Method for Sensorless AC Machine Control With Carrier-Frequency Signal Injection , 2015, IEEE Transactions on Industrial Electronics.

[12]  S. Sul,et al.  Analysis on the position estimation error in position-sensorless operation using pulsating square wave signal injection , 2017, 2017 IEEE Energy Conversion Congress and Exposition (ECCE).