New compensation topologies for wireless power transfer systems
AssigneeAuckland Uniservices Limited
InventorsYou-Chun HUANG, Udaya Kumara MADAWALA
Life of this patent
Estimating the term…
Abstract
Presented is a wireless power transfer (inductive power transfer) apparatus and systems for application to wireless power transfer compensation networks and control of wireless power transfer circuits.
Claims21
A wireless power transfer resonant circuit comprising:
- a power transfer coil;
- and
- a compensation network connected between the power transfer coil and a power input or power output, the compensation network being configured to resonate with the power transfer coil at a first resonant operating frequency and a second resonant operating frequency;
- the compensation network comprising a first tank circuit connected in series with the power transfer coil and a second tank circuit connected in parallel with the power transfer coil;
- wherein the circuit forms a first parallel or series tuned compensation network topology at the first resonant operating frequency and a second parallel or series tuned compensation network topology at the second resonant operating frequency.
A wireless power transfer system comprising a primary resonant power transfer circuit and a secondary resonant power transfer circuit, the system being configured to operate at a plurality of different operating frequencies, each circuit being resonant at each operating frequency and wherein the primary circuit forms a first series tuned compensation network at a first of the operating frequencies and forms a first parallel tuned compensation network at a second of the operating frequencies, and the secondary circuit forms a first parallel tuned compensation networks at the first operating frequency and forms a second parallel tuned compensation network at the second of the operating frequencies.
(canceled)
(canceled)
(canceled)
A method of controlling a wireless power transfer circuit, the method comprising:
- determining a coupling factor for the wireless power transfer circuit;
- selecting an operating frequency from a plurality of discrete operating frequencies at which the circuit is tuned to be resonant dependent on the coupling factor;
- controlling the circuit at the selected operating frequency.
Dependencies are inferred from the claim text.