Sensorless rotor position estimation at standstill of high speed PMSM drive with LC inverter output filter

This paper presents a new innovative method for sensorless rotor position estimation at standstill for high speed PMSM. To avoid critical thermal losses in the high speed PMSM a controlled LC filter is connected between the machine and the inverter. This additional filter leads to failure of many known methods for sensorless rotor position detection at standstill. The presented method is suitable for accurate and reliable detection of the rotor position at standstill. The function principle is based on voltage pulses applied on the LC filter and the high speed PMSM. Based on measured stator currents and voltages a special structure to model the system behavior and to calculate the actual rotor position is used. This allows a parameter insensitive operation. All theoretical proposals are proved by practical experiments.

[1]  M. Schroedl,et al.  Sensorless control of AC machines at low speed and standstill based on the "INFORM" method , 1996, IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting.

[2]  P. T. Finlayson.  Output filters for PWM drives with induction motors , 1997 .

[3]  A. Piippo,et al.  Signal Injection in Sensorless PMSM Drives Equipped With Inverter Output Filter , 2008, IEEE Transactions on Industry Applications.

[4]  M. J. Corley,et al.  Rotor position and velocity estimation for a permanent magnet synchronous machine at standstill and high speeds , 1996, IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting.

[5]  A. Binder,et al.  Fixation of buried and surface-mounted magnets in high-speed permanent-magnet synchronous machines , 2005, IEEE Transactions on Industry Applications.

[6]  A. Piippo,et al.  Sensorless Vector Control of PMSM Drives Equipped With Inverter Output Filter , 2006, IECON 2006 - 32nd Annual Conference on IEEE Industrial Electronics.

[7]  Robert I. King,et al.  Handbook of High-Speed Machining Technology , 1986 .

[8]  Kwang-Seob Kim,et al.  A novel control algorithm of a three-phase PWM inverter with output LC filter , 2007, 2007 European Conference on Power Electronics and Applications.

[9]  Andreas Binder,et al.  Losses in high speed permanent magnet motor with magnetic levitation for 40000/min, 40 kW , 2004 .

[10]  Seung-Ki Sul,et al.  Implementation of sensorless vector control for super-high speed PMSM of turbo-compressor , 2001, Conference Record of the 2001 IEEE Industry Applications Conference. 36th IAS Annual Meeting (Cat. No.01CH37248).

[11]  Ralph Kennel,et al.  Sensorless speed and position control of synchronous machines using alternating carrier injection , 2003, IEEE International Electric Machines and Drives Conference, 2003. IEMDC'03..

[12]  Peter Vas,et al.  Electrical Machines and Drives: A Space-Vector Theory Approach , 1993 .