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Micro stepping of Shape Memory Alloy based Poly Phase motor

Sharma, SV and Nayak, MM and Dinesh, NS and Umanand, L (2008) Micro stepping of Shape Memory Alloy based Poly Phase motor. In: Conference on Industrial Technology, 2008. ICIT 2008. IEEE International , 21-24 April 2008, IISc.

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In literature we find broadly two types of shape memory alloy based motors namely limited rotation motor and unlimited rotation motor. The unlimited rotation type SMA based motor reported in literature uses SMA springs for actuation. An attempt has been made in this paper to develop an unlimited rotation type balanced poly phase motor based on SMA wire in series with a spring in each phase. By isolating SMA actuation and spring action we are able achieve a constant force by the SMA wire through out its range of operation. The Poly phase motor can be used in stepping mode for generating incremental motion and servo mode for generating continuous motion. A method of achieving servo motion by micro stepping is presented. Micro stepping consists of controlling single-phase temperature with a position feedback. The motor has been modeled with a new approach to the SMA wire Hysterysis model. Motor is simulated for different responses and the results are compared with the experimental data.

Item Type: Conference Paper
Publisher: IEEE
Additional Information: Copyright 2008 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Keywords: Shape Memory Alloy (SMA);Poly phase Motor;Torque;Microstep; Control;Position;phase plot.
Department/Centre: Division of Electrical Sciences > Electronic Systems Engineering (Formerly Centre for Electronic Design & Technology)
Date Deposited: 23 Sep 2011 09:35
Last Modified: 23 Sep 2011 09:35
URI: http://eprints.iisc.ac.in/id/eprint/40664

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