NDLI: Efficient deactivation of unused LCC inverter for multiple transmitter wireless power transfer

Content Provider	IET Digital Library
Author	Kim, Woojong Ahn, Dukju
Abstract	The study addresses the difficulties in deactivating an unused transmitter (TX) element for a multiple-transmitter wireless power system that is driven by LCC resonant inverters. One difficulty of TX deactivation is a high-level of unwanted circulating current in unused TX coil, which increases the losses in unused TX. To suppress the unwanted current without the aid of high-voltage isolated switches and detuning capacitors, it is proposed that low-side switches in LCC bridge should be constantly turned on. The other difficulty is the runtime detuning of LCC resonant inverter in response to the activation or deactivation status of adjacent TX coil, which degrades the LCC inverter efficiency. A tuning switch and capacitor cannot directly be inserted at the LCC resonant path due to high-voltage stress and complex driving scheme. Instead, this study proposes a loop that adjusts the effective inductance of the TX coil with low-voltage stress and easy gate driving, thereby increasing the LCC inverter efficiency. The loop also provides an additional power path towards the receiver so that the coil-to-coil efficiency is also increased.
Starting Page	72
Ending Page	82
Page Count	11
ISSN	17554535
Volume Number	12
e-ISSN	17554543
Issue Number	Issue 1, Jan (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/12/1
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2018.5371
Journal	IET Power Electronics
Publisher Date	2018-10-25
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Adjacent TX Coil Capacitor Coil-to-coil Efficiency Coils Efficient Deactivation High-voltage Stress Inductive Power Transmission Inductors And Transformer LC Circuit LCC Bridge LCC Inverter Efficiency LCC Resonant Inverter LCC Resonant Path Low-side Switches Low-voltage Stress Multiple Transmitter Wireless Power Transfer Multiple-transmitter Wireless Power System Power Path Resonant Invertors Tuning Switch TX Deactivation Unused LCC Inverter Unused Transmitter Element Unused TX Coil Unwanted Circulating Current
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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