António Eduardo Vitória Do Espírito SANTO, Maria Do Rosário CALADO

Design and evaluation of a linear switched reluctance actuator for positioning tasks

This paper presents the development of a new linear switched reluctance actuator and confirms its applicability to perform positioning tasks. After the explanation of the actuator working principle and the presentation of its electromechanical topology, an analysis is accomplished using a finite elements tool. Based on the theoretical results, an experimental prototype that can develop 150 N was constructed. Its behaviour is observed under two different control methods implemented with microcontrollers. Initially, position is controlled applying a single pulse-driving scheme. Meanwhile, significant improvements are obtained with the introduction of a sliding-mode controller, allowing movements with 1 mm of resolution.

Anahtar Kelimeler:

Actuator design, linear switched reluctance, position control, sliding mode

Design and evaluation of a linear switched reluctance actuator for positioning tasks

Keywords:

Actuator design, linear switched reluctance, position control, sliding mode,

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The sliding mode controller establishes the switching strategy to be used to turn on and turn oﬀ the LSR actuator phases by means the microcontroller GPIO. The most important software blocks are shown in Figure ISR CPU Timer 0 Take position x from QEP unit Compute position error e Compute derivative position errore s > o Active phase that produces Fl Active phase that produces Fr Collect iA, iBe iCfrom ADC Return Figure 11. TMS320F2812 eZdsp Start Kit code ﬂow.
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