Journal Article10.1109/TPEL.2018.2881207
An IPT Battery Charger With Near Unity Power Factor and Load-Independent Constant Output Combating Design Constraints of Input Voltage and Transformer Parameters
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TL;DR: This paper systematically analyzed the characteristics of an LCC–LCC compensated IPT converter and proposed a design method to realize the required load-independent CC and CV outputs at two zero-phase angle frequencies.
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Abstract: Inductive power transfer (IPT) techniques are becoming popular in battery charging applications due to some unique advantages compared to the conventional plug-in systems. A high-performance IPT charger should provide the battery with an efficient charging profile consisting of constant charging current and constant charging voltage. However, with a wide load range, it is hard to realize the initial load-independent constant current (CC) and the subsequent load-independent constant voltage (CV) using a single IPT converter while maintaining nearly unity power factor and soft switching of power switches simultaneously. This paper systematically analyzed the characteristics of an LCC – LCC compensated IPT converter and proposed a design method to realize the required load-independent CC and CV outputs at two zero-phase angle frequencies. The design also combats the constraints of an IPT transformer and input voltage, thus facilitating the use of a simple duty cycle control operating at two fixed frequencies for both CC and CV operations. The design criteria, control logic, and sensitivities of compensation parameters to the input impedance and load-independent output are discussed. Finally, an IPT battery charger prototype with 1 A charging current and 24 V battery voltage is built to verify the analysis.
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Citations
Unified Load-Independent ZPA Analysis and Design in CC and CV Modes of Higher Order Resonant Circuits for WPT Systems
Jianghua Lu,Guorong Zhu,Deyan Lin,Yiming Zhang,Jin Jiang,Chunting Chris Mi +5 more
- 11 Sep 2019
TL;DR: In this article, a general unified methodology for arbitrary higher-order resonant circuits is proposed to realize the load-independent constant current (CC) and constant voltage (CV) outputs at two different loadindependent zero phase angle (ZPA) frequencies.
125
A Hybrid Control Strategy of LCC -S Compensated WPT System for Wide Output Voltage and ZVS Range With Minimized Reactive Current
TL;DR: In the proposed hybrid control strategy, LCC-S compensated WPT system can realize wide output voltage regulation with zero voltage switching (ZVS), and the reactive current in a resonant tank can be minimized in the whole voltage range.
109
Realizing Constant Current and Constant Voltage Outputs and Input Zero Phase Angle of Wireless Power Transfer Systems With Minimum Component Counts
TL;DR: A unified resonant tuning configuration with minimum passive component counts is proposed to achieve CC and CV outputs at two ZPA operating frequencies and, according to the proposed configuration, all the possible inductive power transfer and capacitive power transfer topologies are analogized.
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Hybrid Inductive-Power-Transfer Battery Chargers for Electric Vehicle Onboard Charging With Configurable Charging Profile
TL;DR: This paper systematically presents a method to derive effective hybrid IPT converters, which starts from some existing topologies having the configurable CC or CV output and cascades a general T network for mode transition.
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Analysis and Design of an LCCC/S-Compensated WPT System With Constant Output Characteristics for Battery Charging Applications
TL;DR: A new LCCC/S topology and its corresponding parameter tuning method is proposed to obtain CC and CV charging modes at two different ZPA operating frequency points, respectively to achieve load-independent CC andCV charging outputs and zero phase angle (ZPA) condition.
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References
Wireless Power Transfer for Electric Vehicle Applications
Siqi Li,Chunting Chris Mi +1 more
TL;DR: In this paper, the authors reviewed the technologies in the wireless power transfer (WPT) area applicable to electric vehicle (EV) wireless charging, and the obstacles of charging time, range, and cost can be easily mitigated.
2.1K
Inductive Power Transfer
Grant A. Covic,John T. Boys +1 more
- 02 Apr 2013
TL;DR: Inductive power transfer (IPT) was an engineering curiosity less than 30 years ago, but, at that time, it has grown to be an important technology in a variety of applications.
1.1K
A Double-Sided LCC Compensation Network and Its Tuning Method for Wireless Power Transfer
TL;DR: With the proposed topology and its tuning method, the resonant frequency is irrelevant with the coupling coefficient between the two coils and is also independent of the load condition, which means that the system can work at a constant switching frequency.
1K
Compensation Topologies of High-Power Wireless Power Transfer Systems
Wei Zhang,Chunting Chris Mi +1 more
TL;DR: This paper provides a comprehensive review of existing compensation topologies for the loosely coupled transformer and discusses the compensation requirements for achieving the maximum efficiency according to different WPT application areas.
930
A Bidirectional Inductive Power Interface for Electric Vehicles in V2G Systems
TL;DR: Results indicate that the proposed bidirectional IPT system is an ideal power interface for efficient and contactless integration of multiple hybrid or EVs into typical power networks.
806