Abstract
This paper presents a study of the magnetic leakage field of a 7 kW wireless electric vehicle charging (WEVC) system. The leakage field was measured in different test configurations and environments. Typical system parameters, such as coil offset and air gap were evaluated in order to determine their influence on the leakage field distribution. All measured results were then validated by magnetic field simulations. Based on the results of this study, a magnetic leakage field assessment method based on simulation is proposed.
Highlights
The majority of wireless electric vehicle charging (WEVC) systems are based on the principle of electromagnetic resonant induction, whereby the primary and secondary coils are tuned to a specific frequency
The vehicle components consist of a vehicle charging unit (VCU) which includes the vehicle pad (VP) and an onboard controller. (Fig. 1)
For the measurements and simulations conducted in this study, a 7 kW WEVC system, referred to as equipment under test (EUT), comprised of a (250x260x20)mm3 VP, a (650x650x50)mm3 base pad (BP), a vehicle shield made of aluminum and primary and secondary power electronics, was used
Summary
This paper presents a study of the magnetic leakage field of a 7 kW wireless electric vehicle charging (WEVC) system. The leakage field was measured in different test configurations and environments. Typical system parameters, such as coil offset and air gap were evaluated in order to determine their influence on the leakage field distribution. All measured results were validated by magnetic field simulations. Based on the results of this study, a magnetic leakage field assessment method based on simulation is proposed.
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