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This paper presents the development of a hybrid Class-E synchronous rectifier for wireless powering of quad-copters through inductive power transfer. A synchronous rectifier relaxes the heatsink requirement for continuous operation as the transistor conduction losses will be lower than the diode conduction losses. This provides an advantage when the weight of the electronics is significant for the...
This paper presents a balanced-to-unbalanced (balun) with bandpass responses. Two ±K-inverters are utilized to replace the quarter-wavelength transmission lines or three quarter-wavelength lines in the conventional balun. The ±Kinverters consist of two half wavelength resonators, which can function as two filtering network. To connect the ±K-inverters in parallel, a filtering balun is realized. Theoretical...
This paper fabricated Class-D switching inverter critically effect to power efficiency of wireless power transfer system and presented equivalent circuit to magnetically coupled resonator. We analyzed Voltage and current of resonator's each node and in order to verification, observed power transfer characteristics of cascading Class-D inverter, magnetically coupled resonator and 50Ω load. Through...
This paper presents a new capacitive wireless power transfer (WPT) system that achieves effective power transfer even with very low values of coupling capacitance between two metal plates separated by an air-gap. A prototype of the proposed capacitive WPT system has been built and shown to transfer 30 W across two 5-cm by 5-cm metal plates separated by an air-gap of 0.5 cm. The power transfer per...
This paper introduces a new capacitive wireless power transfer approach with the potential to significantly enhance power transfer density in large air-gap applications. This enhancement is achieved through the use of multiple phase-shifted capacitive plates that reduce fringing fields in areas where field levels must be limited for safety reasons. The effectiveness of the proposed approach is evaluated...
This paper presents a RIC-WPT system with class-E inverter and class-DE rectifier along with its analytical design procedure. By using the class-E inverter as a transmitter and the class-DE rectifier as a receiver, the designed WPT system can achieve a high power-delivery efficiency because of the class-E ZVS/ZDS conditions in both the inverter and the rectifier. In the experimental results, the system...
This paper presents a resonant inductive coupling wireless power transfer (RIC-WPT) system with a class-DE and class-E rectifier along with its analytical design procedure. By using the class-DE inverter as a transmitter and the class-E rectifier as a receiver, the designed WPT system can achieve a high power-conversion efficiency because of the class-E ZVS/ZDS conditions satisfied in both the inverter...
Resonant coupling wireless power transmission technology fulfills power transmission through the two coils, which have the same resonant frequency to generate high-frequency alternating magnetic field. Compared with the traditional wire transmission, this technique is more flexible, efficient and permeable. In this paper, the system simulation and analysis are carried out on PSpice simulation platform,...
This paper presents a resonant inductive coupling wireless power transfer (RIC-WPT) system with a class-E2 dc-dc converter along with its analytical design procedure. By using the class-E inverter as a transmitter and the class-E rectifier as a receiver, the designed WPT system can achieve a high power-conversion efficiency because of the class-E ZVS/ZDS conditions satisfied in both the inverter and...
In this paper, a multiple wireless power transfer system for multiple gate driver supplies of a medium voltage inverter is developed. The proposed isolation system achieves a galvanic isolation with an air-gap of 50 mm using a wireless power transfer with magnetic resonance coupling. It easily respects the standard of galvanic isolation, which is established by International electrotechnical commission...
Future applications of wireless power transfer will include powering various devices in a room, charging electric vehicles in a parking area, charging moving robots, and so on. Therefore, practical wireless power transfer must be able to support complicated configurations, for example, combination of multireceiver and repeaters. Many past works have discussed methods for improving efficiency and,...
Conductive charging of plug-in and battery electric vehicles (PEV's) is now well established and becoming more pervasive in the market. Conductive charger regulation of vehicle regenerative energy storage system (RESS), or battery pack charge rate is controlled by the dedicated on-board-charger (OBC) in coordination with the vehicles battery management system (BMS). Wireless Power Transfer (WPT) charging...
Electromagnetic Wireless Power Transmission (WPT) can be realized by using resonant coils coupled via their magnetic fields; in order to extend the range for power transmission, it is convenient to introduce additional relay elements. By considering a simple, yet rigorous, equivalent network, we derive a general property which is useful for the design of wireless power transfer networks with relay...
Future applications of wireless power transfer will include powering various devices in a room, charging electric vehicles in a parking area, charging moving robots and so on. Therefore practical wireless power transfer must be able to support complicated configurations for example combination of multi-receiver and repeaters. Many past works have discussed on methods for improving efficiency and more...
Electromagnetic Wireless Power Transmission (WREL) can be achieved by using resonant coils coupled via their magnetic fields; these resonant coils must be, in addition, properly coupled to the source and load. By using a simple, yet rigorous, equivalent network, we introduce a computer-aided design procedure to reach the maximum efficiency for a given value of the resonators quality factor and for...
A novel low power 1-Gbps inductive-coupled transceiver in 0.18 mum CMOS technology is presented in this paper. It consists of a transmitter section which consumes 0.74 mW power and can operate upto 4 Gbps with pulse width of less than 250 ps. The transmitter generates current pulse through inductor both for positive as well as negative transitions of the input signal. The front-end of the receiver...
3D contactless technology based on capacitive coupling represents a promising solution for high-speed and low power signaling in vertically integrated chips. AC coupled interconnects do not suffer from mechanical stress, and the parasitic load is much reduced when compared to standard DC solutions, such as wire bonding and micro bumps. Communication system based on wireless interconnection scheme...
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