Position Estimation of a Matrix-Converter-Fed AC PM Machine From Zero to High Speed Using PWM Excitation

This paper describes a sensorless position estimation method for a permanent-magnet (PM) motor fed from a three-phase matrix converter using only its space-vector pulsewidth-modulation (SVPWM) sequence. The scheme employs measurements of dii/dt of the motor line currents to construct orthogonal ldquoresolverlikerdquo position signals. In principle, the SVPWM waveforms provide sufficient excitation to extract the position signal from the motor current. However, in order to improve the signal-to-noise ratio of the di/dt signals, a small modification to the SVPWM is required. Sensorless control of the PM synchronous motor at zero and high speeds is demonstrated experimentally. The use of alternative input voltage vectors is also investigated to reduce the current ripple.

[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]  Mohamed Rashed,et al.  Sensorless Indirect-Rotor-Field-Orientation Speed Control of a Permanent-Magnet Synchronous Motor With Stator-Resistance Estimation , 2007, IEEE Transactions on Industrial Electronics.

[3]  Qiang Gao,et al.  Sensorless Position and Speed Control of Induction Motors Using High-Frequency Injection and Without Offline Precommissioning , 2007, IEEE Transactions on Industrial Electronics.

[4]  R. D. Lorenz,et al.  Rotor position and velocity estimation for a salient-pole permanent magnet synchronous machine at standstill and high speeds , 1998 .

[5]  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.

[6]  Qiang Gao,et al.  Sensorless Control of Surface Mounted Permanent Magnetic Machine Using the Standard Space Vector PWN , 2007, 2007 IEEE Industry Applications Annual Meeting.

[7]  G. Asher,et al.  Sensorless position and speed control of induction motors using high frequency injection and without off-line pre-commissioning , 2005, 31st Annual Conference of IEEE Industrial Electronics Society, 2005. IECON 2005..

[8]  Mark Sumner,et al.  Elimination of Waveform Distortions in Matrix Converters Using a New Dual Compensation Method , 2007, IEEE Transactions on Industrial Electronics.

[9]  José R. Rodríguez,et al.  Matrix converters: a technology review , 2002, IEEE Trans. Ind. Electron..

[10]  M. Sumner,et al.  Zero speed position estimation of a matrix converter fed AC PM machine using PWM excitation , 2008, 2008 13th International Power Electronics and Motion Control Conference.

[11]  Shinji Doki,et al.  Sensorless control of permanent-magnet synchronous motors using online parameter identification based on system identification theory , 2006, IEEE Transactions on Industrial Electronics.

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

[13]  Ralph Kennel,et al.  Sensorless position control of permanent magnet synchronous machines without limitation at zero speed , 2002, IEEE 2002 28th Annual Conference of the Industrial Electronics Society. IECON 02.

[14]  J. Juliet,et al.  Sensorless acquisition of the rotor position angle for induction motors with arbitrary stator windings , 2004, Conference Record of the 2004 IEEE Industry Applications Conference, 2004. 39th IAS Annual Meeting..

[15]  Mark Sumner,et al.  Sensorless Rotor Position Control in a Surface Mounted PM Machine Using HF Rotating Injection , 2003 .

[16]  Frede Blaabjerg,et al.  Evaluation of modulation schemes for three-phase to three-phase matrix converters , 2004, IEEE Transactions on Industrial Electronics.

[17]  Luca Zarri,et al.  Matrix converter modulation strategies: a new general approach based on space-vector representation of the switch state , 2002, IEEE Trans. Ind. Electron..