Balancing of Common DC-Bus Parallel Connected Modular Inductive Power Transfer Systems

POLAT H., AYAZ E., ALTUN O., KEYSAN O.

IEEE Journal of Emerging and Selected Topics in Power Electronics, vol.10, pp.1587-1596, 2022 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 10
  • Publication Date: 2022
  • Doi Number: 10.1109/jestpe.2021.3074888
  • Journal Name: IEEE Journal of Emerging and Selected Topics in Power Electronics
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex, INSPEC
  • Page Numbers: pp.1587-1596
  • Keywords: Couplings, Receivers, Magnetic resonance, Inductance, Magnetomechanical effects, Resistance, Power electronics, Common dc bus, current balancing, inductive power transfer (IPT), modular design, wireless power transfer, CONVERTER, RECEIVERS, VOLTAGE
  • Middle East Technical University Affiliated: Yes

Abstract

IEEEThe aim of this paper is to design a modular, fault tolerant multi-transmitter(Tx)/multi-receiver(Rx) parallel connected common DC bus inductive power transfer(IPT) system to replace slip rings in wind turbines or brushless exciters. In parallel connected common DC bus systems, current unbalance is a major issue that results in thermal stresses and over current or voltages. In this paper, two different new current balancing methods are proposed: Cross-coupled Rx modules and intentional de-tuning of Rx side resonant frequency. These methods are investigated both analytically and experimentally for a single Tx and two Rx system for a 500 W prototype. The proposed methods are tested independently, and then the combined current balancing method is also investigated. For the same misalignment case, cross-coupled/de-tuned has a 55.8% current balancing improvement compared to de-coupled/fully-tuned topology.