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Direct Instantaneous Thrust Control optimization of a linear switched reluctance actuator by Pulse-width modulation duty ratio adjustment

Pestana, L. ; Calado, M.R.A. ; Mariano, S.J.P.S.

Direct Instantaneous Thrust Control optimization of a linear switched reluctance actuator by Pulse-width modulation duty ratio adjustment, Proc International Conf. on Environment and Electrical Engineering - EEEIC, krakow, Poland, Vol. 1, pp. 464 - 468, May, 2014.

Digital Object Identifier: 10.1109/EEEIC.2014.6835914

Abstract
Direct Instantaneous Torque/Thrust Control (DITC) is a high performance technique, based on selecting the inverter's “optimum voltage vector” thus allowing Force and Flux to quickly reach the reference values. The result is a very good dynamic response. In this paper, we address the direct instantaneous thrust control of a 3-phase 6/4 linear switched reluctance actuator (LSRA) by Pulse-width modulation (PWM) duty ratio adjustment, using the MATLAB simulation environment. The machine is modeled by an analytical model that takes into consideration the non-linearity of the machine and relies in two lookup characteristic tables λ (x,i) and F(x,i), thus relating flux linkage and developed force, as functions of position and current, to estimate thrust.