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...

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Bibliographic Details
Main Authors: Tsao, Chun-Chia, Chi, Wen-Chun, Tsai, Mi-Ching, Cheng, Ming-Yang, Wang, Sheng-He
Format: Conference Proceeding
Language:English
Subjects:
dental handpiece
Dentistry
Observers
Prototypes
rotor position estimation
Rotors
sensorless
Sensorless control
sliding mode observer
Synchronous motors
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Summary: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.
ISSN:2163-5137
DOI:10.1109/ISIE.2013.6563644