Abstract
This paper focuses on the modeling and implementation of an Electric Vehicle (EV) wireless charging system based on inductively coupled power transfer (ICPT) technique where electrical energy can be wirelessly transferred from source to vehicle battery. In fact, the wireless power transfer (WPT) system can solve the fundamental problems of the electric vehicle, which are the short battery life of the EV due to limited battery storage and the user safety by handling high voltage cables. In addition, this paper gives an equivalent electrical circuit of the DC-DC converter for WPT and comprises some basic components, which include the H-bridge inverter, inductive coupling transformer, filter, and rectifier. The input impedance of ICPT with series-series compensation circuit, their phases, and the power factor are calculated and plotted by using Matlab scripts programming for different air gap values between the transmitter coil and receiver coil. The simulation results indicate that it is important to operate the system in the resonance state to transfer the maximum real power from the source to the load. A mathematical expression of optimal equivalent load resistance, corresponding to a maximal transmission efficiency of a wireless charging system, was demonstrated in detail. Finally, a prototype of a wireless charging system has been constructed for using two rectangular coils. The resonant frequency of the designed system with a 500 × 200 mm transmitter coil and a 200 × 100 mm receiver coil is 10 kHz. By carefully adjusting the circuit parameters, the implementation prototype have been successfully transferred a 100 W load power through 10 cm air gap between the coils.
Highlights
Nowadays, the automotive sector is extremely motivated by the development of electric vehicles (EVs) with a projected growth of 6 million by 2020, to reduce air pollution and global warming [1]
The wireless power transfer (WPT) system is a promising solution due to its high safety and convenience, which are important for electrical vehicles [3]. e purpose is to transfer energy without cable from the power source to the load [4]. erefore, the WPT technology can fundamentally solve their problems of short battery life of the electrical vehicle due to limited battery storage or high initial cost due to installation of a large number of batteries [5]
The inductively coupled power transfer (ICPT) method is based on the same principle of inductive power transfer (IPT) technology, with the only difference that the compensation capacitors are connected in series (S) or in parallel (P) with coils to create a “strong coupled between transmitter and receiver coils.” e ICPT technology has advantages to transfer the maximum real power from the source to the load by compensating the leakage energy stored in the coils [17]
Summary
Analysis, and Implementation of Series-Series Compensated Inductive Coupled Power Transfer (ICPT) System for an Electric Vehicle. Is paper focuses on the modeling and implementation of an Electric Vehicle (EV) wireless charging system based on inductively coupled power transfer (ICPT) technique where electrical energy can be wirelessly transferred from source to vehicle battery. E input impedance of ICPT with series-series compensation circuit, their phases, and the power factor are calculated and plotted by using Matlab scripts programming for different air gap values between the transmitter coil and receiver coil. E resonant frequency of the designed system with a 500 × 200 mm transmitter coil and a 200 × 100 mm receiver coil is 10 kHz. By carefully adjusting the circuit parameters, the implementation prototype have been successfully transferred a 100 W load power through 10 cm air gap between the coils
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