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Ea Technology Limited

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Pearce, Matthew

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Marquez, Abiezer Tejeda

Boys, John Talbot

Gawith, James Duncan Deans

Lee, Joshua, Reuben

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Grant Anthony Covic

Andrew William Green

Chang-Yu Huang

Mickel Bipin Budhia

Nicholas Athol Keeling

Edward L Van Boheemen

Grant Arthur John Elliott

Joshua Reuben Lee

Robert Charles Woodhead

Jonathan Beaver

Michael Le Gallais Kissin

Udaya Kumara Madawala

Daniel James Robertson

Shuzo Nishino

Michael John Neath

Adeel Zaheer

Paul W Wallace

Dariusz Kacprzak

Urs Baumann

Abiezer Tejeda Marquez

Oskar Heino Stielau

Hui Zhi Beh

Matthew Pearce

Hunter Hanzhuo Wu

Geoffrey David Baines

Michael Le Galais Kissin

Stephen Paul McDonald

Jason Edward Ian James

James Duncan Deans Gawith

Jack L Woodward

Grant Arthur John Elliot

Edward Van Boheemen

Chang- Yu Huang

Oskar Heino Dept Of Elect Electr Engi Stielau

Foreign object detection apparatus for an IPT system, includes a control means adapted to detect the presence of a foreign object on or adjacent to an IPT primary pad of the system.

Inductive power transfer system and method

An IPT system magnetic flux pad includes two substantially planar coils () in close proximity to each other above a magnetically permeable core (). The coils () each define a pole area () and the distance between one or more adjacent turns of the coils () located in a region between the pole areas () being different from the distance between one or more adjacent turns of the coils () located outside the region between the pole areas ().

Inductive power transfer apparatus

A method of charging a battery includes coupling an electricity network or subnetwork to the battery using inductive power transfer, transferring electrical energy to the battery from the electricity network or subnetwork and varying the inductive power transfer using a controller of the electricity network or subnetwork according to at least one predetermined criteria of the electricity network or subnetwork.

Systems and methods for battery charging

A circuit for energizing a magnetic flux coupling apparatus has a pick-up coil for receiving power inductively, a storage capacitor for storing energy from the received power, and an inverter for supplying electrical energy from the storage capacitor to the magnetic flux coupling apparatus. The circuit allows power transfer to a load to be supplied by the flux coupling apparatus to exceed the power received from the pick-up.

Inductive power system suitable for electric vehicles

A roadway powered electric vehicle system includes a power supply () which makes power available inductively to one or more modules () provided in or under a roadway. Modules () make a magnetic field selectively available to one or more vehicles travelling over the roadway corresponding to the location of the vehicle. The presence or strength of the magnetic field provided on the roadway may be dependent upon the vehicle type or category.

Roadway powered electric vehicle system

A magnetic structure for wireless power transfer has a plurality of pieces of magnetically permeable material arranged along a first dimension. Each piece is separated from a neighbouring piece by a gap defining a separation distance which is selected to prevent partial saturation of a region of the structure.

Current distribution and thermal regulation in inductive power transfer coupling structures

The present invention provides a multi-coil inductive power transfer primary comprising a plurality of coil. A power transfer regime is selected based on a determined load on each of the plurality of coils.

Multiple coil flux pad

An Inductive Power Transfer System pickup provides a controlled AC power supply by controlled variation of the phase angle between the pickup coil induced voltage (jwMI) and the tuning capacitor C voltage. The phase angle can be varied by maintaining the tuning capacitor C voltage substantially constant for a selected time period. Switches Sand Smay be used to clamp the tuning capacitor C voltage at substantially zero volts during the selected time period. Switch Scan be operated to prevent a rise in positive voltage across the tuning capacitor, and switch Scan be used to prevent the voltage across the tuning capacitor from going negative.

Inductively coupled AC power transfer

An inductive charging apparatus includes a primary conductor with at least one node for creating a magnetic field and at least one intermediate resonant circuit including a first coil for receiving inductive power from the node, a second coil operable in use to be driven by current from the first coil to generate a magnetic field for power transfer, and a tuning capacitor coupled to the first and second coils for resonance therewith.

Inductive power transfer apparatus and electric autocycle charger including the inductive power transfer apparatus

Disclosed herein is an inductive power transfer (IPT) compensation circuit and method for reflecting a controlled reactance to a primary conductor at a selected operating frequency, compensating for reactive loads reflected to the primary conductor by one or more other pick-ups inductively coupled with the primary conductor in use. The compensation circuit comprises a first switch means coupled to a resonant circuit and operable to reflect a capacitive reactance to the primary conductor; a second switch means coupled to the resonant circuit and operable to reflect an inductive reactance to the primary conductor; and control means adapted to control operation of the first and second switch means to compensate for inductive and capacitive reactances, respectively, in the primary conductor.

VAR control for inductive power transfer systems

Inductive power transfer flux coupling apparatus includes a first coil arranged in a first layer and configured to generate or receive a magnetic coupling flux in a flux coupling region, and a second coil. At least part of the second coil being arranged in a second layer and is configured to generate a magnetic flux that reflects flux from the first coil.

Magnetic flux coupling structures with controlled flux cancellation

The present invention relates to a current multiplier primarily in the field of power conversion. The invention relates to a controlled current multiplier with a resonant winding to assist with, for example, power conversion. In particular, but not solely, the invention may broadly consist in a current multiplier comprising: a primary winding associated with a power source; a secondary winding associated with a load; a resonant winding associated with a capacitance; and a control means for controlling an output of the secondary winding to the load, the control means associated with the primary or resonant winding. This allows, for instance, control of the high current output to be placed on a low current winding.

Resonant power transfer

An Inductive Power Transfer (IPT) pick-up apparatus includes a magnetically permeable core, a first coil, being wound about the core so as to be inductive coupled therewith such that a current induced in the first coil is most sensitive to a first directional component of magnetic flux and a second coil, being wound about the core so as to be inductively coupled therewith such that a current induced in the second coil is most sensitive to a second directional component of magnetic flux. The first directional component is substantially orthogonal to the second directional component.

Pick-up apparatus for inductive power transfer systems

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