This paper proposes the design and experimental validations of a 13,56 MHz IR-WPT link with a conformal transmitter (Tx) and a miniaturized (about 1 cubic centimeter) receiver (Rx). The Rx is composed of three receiving coils wrapped around a miniaturized sphere and mutually orthogonal, arranged in such a way that quasi-constant dc-output voltage and efficiency are obtained, regardless of the receiver orientation in 3-D. The conformal transmitter is designed to maximize the coupling coefficient, at a reference distance of 5 cm, and is about 7 × 10−3. The quasi-constant output voltage is obtained by connecting each Rx coil to its class-E rectifiers, optimized together with the rest of the system, and by series-connecting their dc output ports, thus de-facto removing any possible dark zone. With a 10-V input source, the dc-output voltage is always above 2.7 V and an average conversion efficiency of 13% for any possible 3-D receiver orientation is obtained.
Design of a Miniaturized Omni-Directional RF-to-dc IR-WPT / Alex Pacini, Francesca Benassi, Diego Masotti, Alessandra Costanzo. - ELETTRONICO. - (2018), pp. 8639104.1-8639104.4. (Intervento presentato al convegno 2018 Wireless Power Transfer Conference (WPTC) tenutosi a Montreal (Canada) nel 3-7 giugno 2018) [10.1109/WPT.2018.8639104].
Design of a Miniaturized Omni-Directional RF-to-dc IR-WPT
Alex Pacini;Francesca Benassi;Diego Masotti;Alessandra Costanzo
2018
Abstract
This paper proposes the design and experimental validations of a 13,56 MHz IR-WPT link with a conformal transmitter (Tx) and a miniaturized (about 1 cubic centimeter) receiver (Rx). The Rx is composed of three receiving coils wrapped around a miniaturized sphere and mutually orthogonal, arranged in such a way that quasi-constant dc-output voltage and efficiency are obtained, regardless of the receiver orientation in 3-D. The conformal transmitter is designed to maximize the coupling coefficient, at a reference distance of 5 cm, and is about 7 × 10−3. The quasi-constant output voltage is obtained by connecting each Rx coil to its class-E rectifiers, optimized together with the rest of the system, and by series-connecting their dc output ports, thus de-facto removing any possible dark zone. With a 10-V input source, the dc-output voltage is always above 2.7 V and an average conversion efficiency of 13% for any possible 3-D receiver orientation is obtained.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
