Ut-Battelle, Inc.

Veda Prakash Galigekere

Gui-Jia Su

Jason L Pries

Burak Ozpineci

Omer C Onar

Erdem Asa

Mostak Mohammad

Utkarsh D Kavimandan

Subho Mukherjee

Polyphase wireless power transfer systems are provided. The transfer system may be used for charging hybrid and electric vehicles. The systems are capable of transferring over 50 KW over an air gap of 15 cm. The systems use a rotating magnetic field to transfer power. The system may comprise transmitter coil assembly. The coil assembly may be one or more layers. The system may employ either unipolar or bipolar coils. The transmitter also comprises compensating capacitance connected in series with at least one coil for each phase. A value of the compensating capacitance for each phase is determined such that the transmitter has at least two independently excitable resonant modes at a resonant frequency. The transmitter is compatible with a plurality of different receivers including three-phase, single phase with a circular coil and single phase with DD coils.

Polyphase wireless power transfer systems, coil assemblies and resonant networks

A method for wirelessly or conductively (non-wireless) providing AC or DC power in AC or DC load applications and bidirectional applications.

Wireless power system

A system and method for sensorless coil detection that exploits a dead-time effect in a WPT inverter as an indicator of presence of a receiver. In one embodiment, a system described herein may be configured to detect arrival of a moving receiver prior to alignment of the moving receiver with the transmitter for power transmission.

System and method of wireless power supply

A wireless power supply power supply including first tuning circuitry coupled directly to a transmitter, the first tuning circuitry including an LCC configuration. The wireless power supply may include second tuning circuitry coupled directly to switching circuitry (e.g., an inverter) of the power supply, where the second tuning circuitry may be operable to direct power from the switching circuitry to the first tuning circuitry for supply to the transmitter, and where the second tuning circuitry includes a reactance operable to establish inductive operation of the switching circuitry at the switching frequency of the switching circuitry.

Tuning circuitry for a wireless power system

A system and method are provided for a feed-forward control of an inverter to reduce, and potentially minimize, a DC link capacitor of a wireless power transfer system. The feed-forward control may be utilized to reduce the capacitance of the DC link capacitor in a single-phase series-series compensated WPT system.

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Oak Ridge, TN, United States of America

Veda Prakash Galigekere