International Journal of
Physical Sciences

  • Abbreviation: Int. J. Phys. Sci.
  • Language: English
  • ISSN: 1992-1950
  • DOI: 10.5897/IJPS
  • Start Year: 2006
  • Published Articles: 2572

Full Length Research Paper

Design and modelling of a linear switched reluctance actuator for biomedical applications

MAHMOUD Imed1*, REHAOULIA Habib1 and AYADI Mahfoudh2  
1Unit Signal, Image and Intelligent Control of Industriel Systems (SICISI), University of Tunis, Tunisia. 2Laboratory of solid Mechanics, Structures and the Technological Development (LMSSDT), University of Tunis, Tunisia.  
Email: [email protected]

  •  Accepted: 18 August 2011
  •  Published: 02 October 2011


This paper deals with a design of linear stepper motor for biomedical applications. The involved biomedical system is a syringe pump generally used for continuous drug infusion. The syringe pump consists of a linear switched reluctance motor (LSRM) coupled to a syringe plunger. In order to determine the axial force to control the syringe plunger, it was necessary to begin by evaluating the thrust force. The latter constituted the key element for designing the motor. Based on the concept of energy balance, a simplified analytical model was developed to predict the electromagnetic characteristics of the linear switched reluctance motor. The validity of results was ensured by direct comparison with the finite element method (FEM).


Key words: Linear switched reluctance motor, syringe pump, modelling, finite-element.