Implementation of electric dental handpieces by sliding mode sensorless control of PMSM

The ability to sustain a smooth-running practice is very important in dentistry. Because of this reason, Electric handpieces driven by permanent magnetic synchronous motors (PMSMs) have been increasingly applied in dentistry and have replaced air-driven ones due to their high efficiency and ability to sustain constant speed while operating. Additionally, they produce little noise compared to the high pitched whine of their air-driven counterparts. As is well known, the rotor position is the necessary information for driving a PMSM. Unfortunately, a dental handpiece requires repeated heat sterilization that will break down the Hall sensors, and further, lacks the space to install an incremental encoder. Therefore, sensorless speed control of a PMSM is the key technology for an electric dental handpiece. In this paper, a sliding mode observer is used to implement an electric dental handpiece. Moreover, a prototype of the electric handpiece system has been designed and built. Experimental results are presented to verify the feasibility.

[1]  Longya Xu,et al.  Position Sensorless Control of PMSM Based on a Novel Sliding Mode Observer over Wide Speed Range , 2006, 2006 CES/IEEE 5th International Power Electronics and Motion Control Conference.

[2]  Dong Myung Lee,et al.  Parallel reduced-order Extended Kalman Filter for PMSM sensorless drives , 2008, 2008 34th Annual Conference of IEEE Industrial Electronics.

[3]  Haitham Abu-Rub,et al.  MRAS-based sensorless control of a five-phase induction motor drive with a predictive adaptive model , 2010, 2010 IEEE International Symposium on Industrial Electronics.

[4]  S Bolognani,et al.  Sensorless Control of IPM Motors in the Low-Speed Range and at Standstill by HF Injection and DFT Processing , 2011, IEEE Transactions on Industry Applications.

[5]  G Pellegrino,et al.  Sensorless Position Control of Permanent-Magnet Motors With Pulsating Current Injection and Compensation of Motor End Effects , 2011, IEEE Transactions on Industry Applications.

[6]  S. Bolognani,et al.  Sensorless control of IPM motors in the low-speed range and at stand-still by HF-injection and DFT processing , 2009, 2009 IEEE International Electric Machines and Drives Conference.

[7]  Jang-Mok Kim,et al.  Sensorless control of PMSM in high speed range with iterative sliding mode observer , 2004, Nineteenth Annual IEEE Applied Power Electronics Conference and Exposition, 2004. APEC '04..

[8]  Liu Jun,et al.  A study of SMO buffeting elimination in sensorless control of PMSM , 2010, 2010 8th World Congress on Intelligent Control and Automation.

[9]  Alfio Consoli,et al.  Industry application of zero-speed sensorless control techniques for PM synchronous motors , 2001 .

[10]  Z. Q. Zhu,et al.  Investigation of Effectiveness of Sensorless Operation in Carrier-Signal-Injection-Based Sensorless-Control Methods , 2011, IEEE Transactions on Industrial Electronics.

[11]  Ying Wu,et al.  Study of position sensorless control of PMSM based on MRAS , 2009, 2009 IEEE International Conference on Industrial Technology.

[12]  Jangmyung Lee,et al.  A High-Speed Sliding-Mode Observer for the Sensorless Speed Control of a PMSM , 2011, IEEE Transactions on Industrial Electronics.

[13]  Vaclav Smidl,et al.  Reduced-order square-root EKF for sensorless control of PMSM drives , 2011, IECON 2011 - 37th Annual Conference of the IEEE Industrial Electronics Society.

[14]  Longya Xu,et al.  Sliding Mode Sensorless Control of PM Synchronous Motor for Direct-Driven Washing Machines , 2006, Conference Record of the 2006 IEEE Industry Applications Conference Forty-First IAS Annual Meeting.