Abstract
Wireless Power Transfer (WPT) has become an advantageous and commercially viable technology in recent years, concurrently with the prevalence of electric vehicles and smartphones. Capacitive Power Transfer (CPT) is one of the latest techniques in WPT. It has an uncomplicated structure and is safer compared to other WPTs. Nonetheless, the major issue of the CPT system is that its efficiency significantly decreases when there is variation in load. In this paper, a state-feedback (SF) controller model which is able to maintain the output voltage was described. Hence, the overall efficiency of the system was retained even with load variations. A mathematical model of the CPT system was developed using Generalized State Space Averaging (GSSA) method. The proposed SF controllers were designed based on Linear Quadratic Regulator (LQR) and pole placement method. MATLAB was used to validate and simulate two SF controllers with the CPT system. The obtained results showed that the SF controllers model improved the system response's speed and provided a satisfactory response in maintaining the output voltage.
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