Abstract
This paper proposes an autonomous coil alignment system (ACAS) for electric vehicles (EVs) with dynamic wireless charging (DWC) to mitigate the reduction in received power caused by lateral misalignment between the source and load coils. The key component of the ACAS is a novel sensor coil design, which can detect the load coil’s left or right position relative to the source coil by observing the change in voltage phase. This allows the lateral misalignment to be estimated through the wireless power transfer (WPT) system alone, which is a novel tracking method for vehicular applications. Once misalignment is detected, the vehicle’s lateral position is self-adjusted by an autonomous steering function. The feasibility of the overall operation of the ACAS was verified through simulation and experiments. In addition, an analysis based on experimental results was conducted, demonstrating that 26% more energy can be transferred during DWC with the ACAS, just by keeping the vehicle’s load coil aligned with the source coil.
Highlights
With the realization of electric vehicles (EVs) to reduce greenhouse gases, significant research and development directed towards improving EVs’ feaatures has been conducted during recent years.one main disadvantage of EVs is their battery technology due to its high cost and limited driving range
21, except there is a lower voltage amplitude, because the source coil was operating at a 10 W power level
This paper has proposed an autonomous coil alignment system (ACAS) for EVs with dynamic wireless charging (DWC) to maximize the power delivered to the
Summary
With the realization of electric vehicles (EVs) to reduce greenhouse gases, significant research and development directed towards improving EVs’ feaatures has been conducted during recent years. DWC scheme is the reduction can be EV extended, allowing owners to drive longer distances without the anxietyinofreceived having topower worryand the one main disadvantage this DWC scheme the reduction received power aboutHowever, EV range [7].when efficiency that occurs there is a lateral of misalignment of theisvehicle’s loadin coil and the source and efficiency that occurs when there is a lateral misalignment of the vehicle’s load coil and sourcecoil the the one road. Other methods include active coil resonance frequency tuning circuits to maximize lateral proposed described above are constructive, but their implementation in vehicular applications implementation vehicular applications can be very limited, due to the vehicle’s limited installation tolerance [15,16].in. Within the occur tolerance range, loss power will still inevitably occur whenever the lateral misalignment increases
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