Dual-Transmitter Inductive Power Transfer System with Improved Misalignment Tolerance and High Compatibility with Different-Sized Receivers

Bill Of Materials ◽

Efficiency Performance ◽

A dual-transmitter inductive power transfer system featuring two concentric transmitter coils is proposed for low-power systems where compatibility with different-sized receivers and good misalignment tolerance are required. By incorporating two decoupled TXs into one single unit, the proposed scheme achieves better power and efficiency performance under a lower bill-of-materials cost compared to using two individual TXs, especially when the RX coil is small and the coil misalignment is large. Both TXs are energized using independent inverters and the inverter output voltages are regulated in accordance with the coupling condition to maximize the system efficiency. Superiority of the dual-TX system over single-TX systems is proved by experimental results. <br>

The effect of rotatory coil misalignment on transfer parameters of inductive power transfer systems

Wireless Power Transfer ◽

10.1017/wpt.2019.7 ◽

2019 ◽

Vol 6 (2) ◽

pp. 77-84

Author(s):

Florian Niedermeier ◽

Marius Hassler ◽

Josef Krammer ◽

Benedikt Schmuelling

Keyword(s):

Secondary Coil ◽

Transfer System ◽

Control Parameters ◽

System Efficiency ◽

Power Transfer ◽

The Past ◽

Transfer Parameters ◽

Simulation Results ◽

AbstractThe characteristic transfer parameters of inductive power transfer systems highly depend on the relative position of the coils to each other. While translational offset has been investigated in the past, the effect of rotatory offset on the transfer parameters is widely unclear. This paper contains simulation results of an inductive power transfer system with a rotatory offset in three axes and shows the possible improvements in the coupling coefficient. As a result, rotation angles can be used as control parameters and thereby increase the system efficiency. Alternatively, the allowed misalignment area of the secondary coil can be increased while maintaining the functionality and same dimensions.

Experimental Verification for Practical Application of Inductive Power Transfer System for Railway

IEEJ Transactions on Industry Applications ◽

10.1541/ieejias.136.37 ◽

2016 ◽

Vol 136 (1) ◽

pp. 37-45 ◽

Cited By ~ 3

Author(s):

Daisuke Shimode ◽

Toshiaki Murai ◽

Tadashi Sawada

Keyword(s):

Experimental Verification ◽

Transfer System ◽

Power Transfer ◽

Practical Application ◽

Transmitter Control for Harmonics Reduction in Inductive Power Transfer System

2020 IEEE 9th Global Conference on Consumer Electronics (GCCE) ◽

10.1109/gcce50665.2020.9292061 ◽

2020 ◽

Author(s):

Daisuke Kobuchi ◽

Kentaro Matsuura ◽

Yoshiaki Narusue ◽

Hiroyuki Morikawa

Keyword(s):

Transfer System ◽

Power Transfer ◽

A Graphical Design Methodology Based on Ideal Gyrator and Transformer for Compensation Topology with Load-Independent Output in Inductive Power Transfer System

Electronics ◽

10.3390/electronics10050575 ◽

2021 ◽

Vol 10 (5) ◽

pp. 575

Author(s):

Qian Su ◽

Xin Liu ◽

Yan Li ◽

Xiaosong Wang ◽

Zhiqiang Wang ◽

...

Keyword(s):

Phase Angle ◽

Design Methodology ◽

Constant Current ◽

Current Gain ◽

Transfer System ◽

Power Transfer ◽

Current Output ◽

Zero Phase ◽

Compensation is crucial in the inductive power transfer system to achieve load-independent constant voltage or constant current output, near-zero reactive power, higher design freedom, and zero-voltage switching of the driver circuit. This article proposes a simple, comprehensive, and innovative graphic design methodology for compensation topology to realize load-independent output at zero-phase-angle frequencies. Four types of graphical models of the loosely coupled transformer that utilize the ideal transformer and gyrator are presented. The combination of four types of models with the source-side/load-side conversion model can realize the load-independent output from the source to load. Instead of previous design methods of solving the equations derived from the circuits, the load-independent frequency, zero-phase angle (ZPA) conditions, and source-to-load voltage/current gain of the compensation topology can be intuitively obtained using the circuit model given in this paper. In addition, not limited to only research of the existing compensation topology, based on the design methodology in this paper, 12 novel compensation topologies that are free from the constraints of transformer parameters and independent of load variations are stated and verified by simulations. In addition, a novel prototype of primary-series inductor–capacitance–capacitance (S/LCC) topology is constructed to demonstrate the proposed design approach. The simulation and experimental results are consistent with the theory, indicating the correctness of the design method.