Electromagnetic Compatibility Issues in Wireless Power Transfer Systems

Dear Colleagues,

With an ever-growing passion for reliability and convenience of electric power transfer, wireless power transfer (WPT) has become very popular topic for research last decade. Nowadays, range of applications of WPT is very wide ranging from low-power devices to high-power ones. WPT can be used for wireless battery charging of electrical vehicles, implanted electronic devices, mobile robots and so on, as well as WPT can be used to transfer electric power to movable sensors and many other applications of WPT can be mentioned. For wireless power transfer near-field WPT techniques are very popular. They mainly include inductive-resonant, capacitive and strongly coupled magnetic resonant WPT techniques. One of the main drawbacks of nearfield WPT systems (which is not effectively solved yet) is that being inherently switch-mode converters, WPT systems emit conducted emissions and radiated emissions that can cause significant electromagnetic interference (EMI) to sensitive electronic equipment and pose important electromagnetic compatibility (EMC) issues. Additionally, WPT systems can generate strong leakage electromagnetic fields that can pose significant electromagnetic safety issues and can be hazardous for human health. WPT systems must comply with EMC standards and public health regulations. Thus, the electromagnetic emissions generated by WPT systems should be reduced.

This Special Issue is focused on improving of EMC and electromagnetic safety of modern nearfield WPT systems (inductive-resonant, strongly coupled magnetic resonant and capacitive WPT systems). Papers on modeling of electromagnetic emissions of WPT systems and coils as well as on novel or improved electromagnetic emission reduction techniques applied to near-field WPT systems are welcome. When proposing novel EMI reduction techniques or improving existing approaches, trade-off between EMI levels and other important performance characteristics (e.g. efficiency, power density, etc.) of WPT systems should be considered. Review articles on EMC and electromagnetic safety issues in WPT systems are also welcome. Potential research topics include, but are not limited to:

• Novel conducted and radiated EMI reduction techniques applied to near-field WPT systems
• Improvement of existing EMI suppression techniques applied to near-field WPT systems
• Spread spectrum-based reduction of EMI in WPT systems
• Reduction of leakage fields
• EMC issues in MHz inductive and capacitive WPT systems
• Modeling and optimization of WPT systems and WPT coils considering EMC and field leakage
• Modeling of electromagnetic fields generated by WPT systems
• Minimization of side-effects of existing EMI suppression techniques on other performance characteristics of WPT systems

Dr. Deniss Stepins
Prof. Dr. Myunghoi Kim
Prof. Dr. Janis Zakis
Guest Editors

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