NDLI: Hybrid IPT system with natural CC–CV output characteristics for EVs battery charging applications

Content Provider	IET Digital Library
Author	Li, Guanxi Ma, Hao
Abstract	To charge the battery of electric vehicles (EVs), inductive power transfer (IPT) system has been considered to be more appropriate than traditional plug-in system especially for its security and convenience. This study proposes a hybrid IPT system for EVs charging applications adopting one transmitter coil with series compensation and two receiver coils with series compensation and LCL compensation. With the help of the two receiver coils and proper parameters design, the proposed system can naturally obtain constant current (CC) and constant voltage (CV) outputs and the maximum output power can be naturally limited which can prevent the system from possible overload. Therefore, the reliability of the proposed system is increased. Since the mode switching process can be automatically realised according to the value of battery equivalent load without extra control strategy and circuit, the fixed-frequency control can be used. Therefore, not only zero phase angle condition, but also the soft switching can be achieved. The theoretical analysis is presented with the design process of the IPT coils and resonance parameters for required battery charging profile. The performance of the system is verified by a 3.3 kW experimental prototype. The experimental results coincide well with the theoretical analysis.
Starting Page	3734
Ending Page	3743
Page Count	10
ISSN	17554535
Volume Number	13
e-ISSN	17554543
Issue Number	Issue 16, Dec (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/13/16
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2020.0563
Journal	IET Power Electronics
Publisher Date	2020-08-28
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Battery Chargers Battery Equivalent Load Battery Powered Vehicle Coils Compensation Control of Electric Power System Electric Vehicle EVs Battery Charging Application Frequency Control Hybrid IPT System Inductive Power Transmission IPT Coils LCL Compensation Maximum Output Power Natural CC–CV Output Characteristics Power 3.3 KW Power Converter Power Supplies to Apparatus Receiver Coils Required Battery Charging Profile Secondary Cell Series Compensation Transmitter Coil Transportation
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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