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Receive Power Control in Multiuser Inductive Power Transfer System Using Single-Frequency Coil Array

Quang-Thang DUONG, Minoru OKADA

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Summary :

This paper investigates receive power control for multiuser inductive power transfer (IPT) systems with a single-frequency coil array. The primary task is to optimize the transmit coil currents to minimize the total input power, subject to the minimum receive powers required by individual users. Due to the complicated coupling mechanism among all transmit coils and user pickups, the optimization problem is a non-convex quadratically constrained quadratic program (QCQP), which is analytically intractable. This paper solves the problem by applying the semidefinite relaxation (SDR) technique and evaluates the performance by full-wave electromagnetic simulations. Our results show that a single-frequency coil array is capable of power control for various multiuser scenarios, assuming that the number of transmit coils is greater than or equal to the number of users and the transmission conditions for individual users are uncorrelated.

Publication
IEICE TRANSACTIONS on Communications Vol.E101-B No.10 pp.2222-2229
Publication Date
2018/10/01
Publicized
2018/04/05
Online ISSN
1745-1345
DOI
10.1587/transcom.2017EBP3387
Type of Manuscript
PAPER
Category
Antennas and Propagation

Authors

Quang-Thang DUONG
  Nara Institute of Science and Technology
Minoru OKADA
  Nara Institute of Science and Technology

Keyword