الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Recently, the Wireless power transfer systems (WPT) has grasped more attention, one of the main challenges in WPT systems is performance degradation when the receiver’s position and characteristics vary. The variations in the system parameters like load impedance and coupling factor in WPT systems affect performance characteristics such as output voltage and power. The system efficiency degrades as the parameters vary from the optimum operating conditions. Therefore, the first section of this thesis is devoted to a thorough theoretical review of different compensation topologies in order to better understand how they function and, as a result, to help in the construction of a generalized inductive power transfer (IPT) structure based on the parameters to be optimized.
In this thesis, the double-sided inductor–capacitor–capacitor (LCC) compensation topology is adopted due to the following reasons. The unity power factor can be easily achieved by tuning reactive power in secondary side. Other benefits include that the zero-voltage switching (ZVS) for MOSFETs is independent on the variation of coupling coefficient and load states. The LCC compensation is the most commonly used topology in literature because it reduces current tension in the inverter, has a large misalignment tolerance, and it is load independent. One of the main challenges of converters used for the IPT systems is the increased switching loss as the switching frequency rises. Switching losses are reduced using the ZVS and ZCS strategies. To achieve ZVS, the feedback diode must conduct before the MOSFET. As a result, the MOSFET module must run at a negative current. In another word, the current must lag behind the voltage which means that the entire input converter’s impedance must be inductive in this situation.
A Photovoltaic (PV) based battery charger utilizing IPT interface system is proposed in the thesis. Because of nonlinear characteristics of the PV, the maximum power point tracking (MPPT) is achieved by controlling the phase displacement angle or the pulse width of the quasi-square pulse inverter connected to the transmitting coil of the IPT system. As a result, the power transferred to the secondary-side, which is connected to a battery bank, is regulated. In addition, the LCC compensation network is tuned to realize ZVS where any inverter switch is turned-on. Moreover, for quasi-square wave operation, where the duty ratio of the IPT inverter is controlled, the ZVS is attained for switches in one-leg during turn-on and for the other leg during turn-off.
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The thesis presents the detailed design of the IPT-based PV interface system to achieve ZVS in the primary side at rated conditions to minimize the switching loss. The feasibility and dynamic performance of the proposed IPT-based PV interface system are investigated by means of simulation studies using PSCAD/EMTDC package.