Fault Tolerant Multi-Tx/Multi-Rx Inductive Power Transfer System with a Resonator Coil


IEEE Journal of Emerging and Selected Topics in Power Electronics, vol.11, no.1, pp.1272-1284, 2023 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 11 Issue: 1
  • Publication Date: 2023
  • Doi Number: 10.1109/jestpe.2022.3208423
  • 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.1272-1284
  • Keywords: Couplings, Q-factor, Circuit faults, Vehicle dynamics, Power distribution, Rectifiers, Bifurcation, Common dc bus, fault tolerance, inductive power transfer (IPT), modular design, reliability, resonator coil, wireless power transfer, INVERTER SYSTEM, WPT SYSTEM, IPT, DESIGN
  • Middle East Technical University Affiliated: Yes


IEEEThis paper presents a novel multi-transmitter (Tx) / multi-receiver (Rx) inductive power transfer system. Compared to conventional single-Tx/single-Rx systems, multi-Tx/multi-Rx topologies increase reliability and fault tolerance. However, unequal power distribution is challenging in these systems due to coupling differences, which prevents them from operating at rated power or requires over-designed modules. This study proposes the addition of a middle-stage resonator (MSR) that balances power distribution by separating direct couplings between Tx and Rx coils. Thus, it increases reliability and fault tolerance. Direct couplings between Tx and Rx coils are avoided via the proposed coil structure, which also provides rotational symmetry. Moreover, an analytical method is proposed to avoid bifurcation, which reduces switching losses. Then, the fault tolerance analysis on multi-Tx/multi-Rx systems and optimum selection of module numbers are investigated. Finally, a 1kW 2Tx/1MSR/4Rx prototype is established to continue operation under single-Tx, single-Rx, and double-Rx open circuit faults.