Analysis and Design of Single-Ended Resonant Converter for Wireless Power Transfer Systems

Abstract

Single-ended resonant converters such as Class-E inverters have been widely considered as a potential topology for small- and medium-power wireless power transfer (WPT) applications, which feature compact circuits, low switching losses, and cost benefits, as they only use a low-side switch with a simple gate driver. However, there remains a practical challenge in the design of voltage stress, efficiency, and power density. In this paper, a single-ended resonant converter with a primary parallel resonant-matching network is investigated to absorb the bulky input-choke inductors of the Class-E inverters into the coil inductance. The analytical expressions for all the converter parameters are derived based on time-domain resonant waveforms, including: (1) analysis of critical zero-voltage switching (ZVS) conditions and (2) power transfer capabilities under the given maximum switch voltage stress. Furthermore, this paper elaborates on the design methodology of the proposed single-ended resonant converters, and an optimal operating point is chosen to ensure soft-switching operation and rated power. Finally, the accuracy of the proposed model is verified by simulation and experimental results.

A MCR‐WPT system based on LCL‐S/P hybrid compensation network with CC/CV and maximum power optimization suiting for battery charging

“…It is considered an emerging option for the future power transmission system [1][2][3][4][5][6][7][8]. In the past few years, WPT techniques have been used to charge battery across a range in many applications, such as cell phones, wearable devices, biomedical implants and electric vehicle [7][8][9][10][11][12][13][14][15].…”

Inductive Compensation of an Open-Loop IPT Circuit: Analysis and Design

“…The most used compensation topologies consist of adding one capacitor in series with each leakage inductance Cp and Cs (Figure 3). Both capacitors are chosen to be in resonance with each leakage inductance [20][21][22].…”

“…The most used compensation topologies consist of adding one capacitor in series with each leakage inductance C p and C s (Figure 3). Both capacitors are chosen to be in resonance with each leakage inductance [20][21][22]. An indispensable stage in IPT circuits is the resonant tank, also known as resonant network, which is an electrical circuit designed with capacitors and inductors which is capable of storing electrical energy and oscillating when it is operating at the resonant frequency.…”

Design Consideration of ZVS Single-Ended Parallel Resonant DC-DC Converter, Based on Application of Optimization Techniques

“…In [22], an optimal design of a wireless charger for an electric car was proposed, the main results being related to the application of new types of power transistors (SiC-MOSFET and Si-IGBT) and the provision of favorable temperature regimes. Single-ended transistor resonant converters in wireless power transmission systems are considered in [23,24]. An analysis and design of a parallel single-ended transistor circuit is proposed, and analytical dependences of the change in efficiency and output power when changing the load and the air gap are given.…”

“…Experimental studies are presented that prove the low losses and the high efficiency of energy flow management realized with single-ended transistor resonance circuits. The following conclusions, recommendations and generalizations follow from the review, systematization and analysis of published manuscripts devoted to research related to single-ended transistor resonant converters [13,18,[24][25][26][27][28][29]]:…”