Decoupling control of modular WPT systems

Zhu, Chen; Zhong, Wenxing; Xu, Dehong

doi:10.1109/apec39645.2020.9124187

Cited by 2 publications

(1 citation statement)

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“…One of the key challenges in the multi-Tx WPT systems is the cross-coupling between closely spaced Tx coils [4]- [6], which may give rise to multiple unwanted issues, such as cross power transfer between Tx coils, compromised resonance conditions, excitation of reactive currents, and affecting soft switching condition of the power converters [7]. The use of overlapped coils may help to realize small cross coupling in air-core coils [8], however, this solution limits the design freedom as the coil positions need to be fixed.…”

Section: Introductionmentioning

confidence: 99%

Self-Decoupled and Integrated Coils for Modular Multitransmitter Wireless Power Transfer Systems

Jayathurathnage

Liu

Kyyrä

2022

IEEE Trans. Power Electron.

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The use of multiple transmitters (Tx) has been an attractive solution for enabling free-positioning wireless power transfer (WPT) in a large area. One of the key challenges in such multi-Tx WPT systems is the cross-coupling between Tx coils. This letter proposes a compact self-decoupled Tx coil solution for multi-Tx WPT systems. The measured cross-coupling between Tx coils has been reduced by 95% compared to conventional coil designs. Additionally, an integration method for a compensation inductor with the main Tx coil is proposed. Therefore, the coil design proposed in this letter facilitates creation of fully modular and scalable Tx coils for multi-Tx WPT systems. The proposed designs are experimentally verified in a laboratory prototype.

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