This paper describes the modeling, analysis, and design of a complete (dc-to-dc) inductive wireless power transfer (WPT) system for industrial moving applications. The system operates at 6.78 MHz and delivers up to 150 W to a load moving along a linear path, providing a quasi-constant dc output voltage and maintaining a zero voltage switching operation, regardless of position and load, without any retuning or feedback. The inductive link consists of an array of stationary transmitting coils and a moving receiving coil whose length is optimized to achieve a constant coupling coefficient along the path. Each Tx coil is individually driven by a constant amplitude and phase sinusoidal current that is generated from a GaN-based coupled load-independent Class EF inverter. Two adjacent transmitters are activated at a given time depending on the receiver's position; this effectively creates a virtual series connection between the two transmitting coils. The Rx coil is connected to a passive Class E rectifier that is designed to maintain a constant dc output voltage independent of its load and position. Extensive experimental results are presented to show the performance over different loading conditions and positions. A peak dc-to-dc efficiency of 80% is achieved at 100 W of dc output power and a dc output voltage variation of less than 5% is measured over a load range from 30 to 500 Ω. The work in this paper is foreseen as a design solution for a high-efficient, maintenance-free, and reliable WPT system for powering sliders and mass movers in industrial automation plants.

Pacini, A., Costanzo, A., Aldhaher, S., Mitcheson, P.D. (2017). Load- and Position-Independent Moving MHz WPT System Based on GaN-Distributed Current Sources. IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 65(12), 5367-5376 [10.1109/TMTT.2017.2768031].

Load- and Position-Independent Moving MHz WPT System Based on GaN-Distributed Current Sources

Pacini, Alex;Costanzo, Alessandra;
2017

Abstract

This paper describes the modeling, analysis, and design of a complete (dc-to-dc) inductive wireless power transfer (WPT) system for industrial moving applications. The system operates at 6.78 MHz and delivers up to 150 W to a load moving along a linear path, providing a quasi-constant dc output voltage and maintaining a zero voltage switching operation, regardless of position and load, without any retuning or feedback. The inductive link consists of an array of stationary transmitting coils and a moving receiving coil whose length is optimized to achieve a constant coupling coefficient along the path. Each Tx coil is individually driven by a constant amplitude and phase sinusoidal current that is generated from a GaN-based coupled load-independent Class EF inverter. Two adjacent transmitters are activated at a given time depending on the receiver's position; this effectively creates a virtual series connection between the two transmitting coils. The Rx coil is connected to a passive Class E rectifier that is designed to maintain a constant dc output voltage independent of its load and position. Extensive experimental results are presented to show the performance over different loading conditions and positions. A peak dc-to-dc efficiency of 80% is achieved at 100 W of dc output power and a dc output voltage variation of less than 5% is measured over a load range from 30 to 500 Ω. The work in this paper is foreseen as a design solution for a high-efficient, maintenance-free, and reliable WPT system for powering sliders and mass movers in industrial automation plants.
2017
Pacini, A., Costanzo, A., Aldhaher, S., Mitcheson, P.D. (2017). Load- and Position-Independent Moving MHz WPT System Based on GaN-Distributed Current Sources. IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 65(12), 5367-5376 [10.1109/TMTT.2017.2768031].
Pacini, Alex; Costanzo, Alessandra; Aldhaher, Samer; Mitcheson, Paul D.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/613276
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