Position Estimation Using PWM Excitation Method with Minimized Ripple Current

This paper introduces an optimum strategy for minimizing ripple current in position estimation using PWM based excitation at various operating ranges. The “optimum strategy” in this paper means strategy which provides a robust current derivative measurement for obtaining the saliency information while keeping the ripple current at minimum. The paper analyzes various PWM phase shifting strategies presently used for extracting position through the use of fundamental PWM excitation, in terms of robustness and ripple current. The paper also introduces new strategy for extracting robust current derivative measurement at various operating range with decreased ripple current, thereby improving the PWM Excitation based position estimation. Simulation and Experimental results shows the effectiveness of such strategy.

[1]  P. Garcia,et al.  Accuracy, Bandwidth, and Stability Limits of Carrier-Signal-Injection-Based Sensorless Control Methods , 2007, IEEE Transactions on Industry Applications.

[2]  M. Sumner,et al.  Sensorless Control of Induction Machines, including Zero Frequency using only Fundamental PWM Excitation , 2006, IECON 2006 - 32nd Annual Conference on IEEE Industrial Electronics.

[3]  E. Robeischl,et al.  Optimized INFORM measurement sequence for sensorless PM synchronous motor drives with respect to minimum current distortion , 2002, IEEE Transactions on Industry Applications.

[4]  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.

[5]  D. Yousfi,et al.  Indirect position and speed sensing for PMSM sensorless control , 2007, 2007 7th Internatonal Conference on Power Electronics.

[6]  Silverio Bolognani,et al.  Sensorless control for IPMSM using PWM excitation: Analytical developments and implementation issues , 2011, 2011 Symposium on Sensorless Control for Electrical Drives.

[7]  F. Blaabjerg,et al.  High frequency injection assisted “active flux” based sensorless vector control of reluctance synchronous motors, with experiments from zero speed , 2011, 2011 IEEE Energy Conversion Congress and Exposition.

[8]  Mark Sumner,et al.  Position Estimation of AC Machines at all Frequencies using only Space Vector PWM based Excitation , 2006 .

[9]  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.

[10]  M. Sanada,et al.  Sensorless control strategy for salient-pole PMSM based on extended EMF in rotating reference frame , 2001, Conference Record of the 2001 IEEE Industry Applications Conference. 36th IAS Annual Meeting (Cat. No.01CH37248).

[11]  Mengqi Wang,et al.  Stator inductance estimation for permanent magnet motors using the PWM excitation , 2017, 2017 IEEE Energy Conversion Congress and Exposition (ECCE).