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Multistage matching networks are often utilized to provide voltage or current gains in resonant conversion applications, such as large conversion ratio power converters and wireless power transfer. In the conventional approach, each stage of a multistage matching network is designed to have a purely resistive input impedance and assumed to be loaded by a purely resistive load. This paper introduces...
This paper introduces a closed-loop control architecture for an impedance control network (ICN) resonant dc-dc converter that regulates the converter's output voltage while achieving soft-switching across wide operating ranges. This architecture is based on enhanced phase-shift control of the ICN converter, in which the inverter and rectifier phase-shifts are simultaneously controlled to regulate...
This paper introduces a single-stage isolated 48V-to-1.8V point-of-load converter based on the impedance control network (ICN) resonant converter architecture. This point-of-load ICN converter achieves large step-down while maintaining high efficiency across a wide range of input voltage and output power. Large step-down is achieved through a combination of stacked inverters, a transformer and a resonant...
This paper introduces a very-high-power-transfer-density GaN-based capacitive wireless power transfer (WPT) system, suitable as one module of a multi-modular WPT system for charging of electric forklifts. This capacitive WPT system achieves very high power transfer density by operating at a high switching frequency (6.78 MHz) using a GaN-based inverter, and by utilizing innovatively designed L-section...
This paper introduces a single-stage isolated 48V-to-1.8V point-of-load converter based on the impedance control network (ICN) resonant converter architecture. This point-of-load ICN converter achieves large step-down while maintaining high efficiency across a wide range of input voltage and output power. Large step-down is achieved using a novel immittance network transformer and a resonant current-doubler...
This paper investigates the tradeoffs involved in designing a single module in a multi-modular scalable capacitive wireless power transfer system suitable for stationary and inmotion electric vehicle charging. A matching network optimization is employed to design the module over a range of power levels, air-gap voltages, input and output voltages, and switching frequencies to evaluate impacts on its...
This paper introduces an isolated step-down impedance control network (ICN) resonant dc-dc converter that utilizes enhanced inverter and rectifier phase-shifts to achieve both soft-switching and output voltage regulation. Compared to previously presented ICN converters, which utilize burst-mode control to achieve output voltage regulation, this ICN converter with the proposed enhanced phase-shift...
Multistage matching networks are often utilized to provide voltage or current gains in applications such as wireless power transfer. Usually, each stage of a multistage matching network is designed to have a purely resistive input impedance and assumed to be loaded by a purely resistive load. This paper introduces an improved design optimization approach for multistage matching networks comprising...
High-power large air-gap capacitive wireless power transfer (WPT) systems require matching networks that provide large voltage or current gain and reactive compensation. This paper introduces an analytical optimization approach for the design of L-section multistage matching networks for capacitive WPT systems. The proposed approach maximizes the matching network efficiency and identifies the optimal...
This paper presents the design of microstrip slot antenna in order to investigate bandwidth enhancement with better return loss. It is observed that the impedance bandwidth can be improved through various slot configurations in microstrip patch antenna. In this study three slots of 25 mm2, 51.5mm2 and 276 mm2 are considered on the ground plane for bandwidth enhancement. It is observed that the addition...
This paper introduces a new design methodology for high-frequency resonant dc-dc converters utilizing the recently proposed impedance control network (ICN) converter architecture. This design methodology guarantees zero voltage switching (ZVS) and near zero current switching (ZCS) of all transistors across the entire operating range of the converter. As compared to previous ICN converter design techniques,...
This paper introduces a new isolated resonant dc-dc converter topology based on the recently proposed impedance control network (ICN) converter architecture. This new converter maintains very high efficiency by achieving zero voltage switching (ZVS) and near zero current switching (ZCS) across a very wide operating range. Additional performance enhancement is achieved through a new design methodology...
An impedance matching technique for RF-MEMS switch based microstrip patch antenna is considered in this paper to improve the return loss and impedance bandwidth. It is observed that the impedance matching can be improved by using a lumped element based matching network. The impedance matching technique is performed by using Smith Chart and verified through Ansoft HFSS simulations. An inductor of 1...
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