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In this work, a new predictive phase-locked loop (PLL) for encoderless control of a permanent-magnet synchronous generator (PMSG) in a variable-speed wind energy conversion system (WECS) is presented. The idea of the predictive PLL is derived from the direct-model predictive control (DMPC) principle. The predictive PLL uses a limited (discretized) number of rotor-angles for predicting/estimating the...
This paper explores the possibilities of position estimation for linear electromagnetic actuators, in comparison to rotating electric motors. The linear actuator under study is a DC type short stroke permanent magnet actuator with an E-core stator. The non-linearity in the inductance model is first measured and identified on a commercially available actuator, after which a demodulation scheme, inspired...
The use of an electromagnetic actuator (EA) is a promising way to replace conventional mechanical actuation such as valve actuation in machines. However, in order to achieve a better performance than mechanical actuation, new control strategies have to be investigated. In this paper, a novel control algorithm based on model predictive control (MPC) is proposed that is able to satisfy all the system...
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