Inductive power transfer system
AssigneeDrayson Technologies (Europe) Limited
InventorsPaul David Mitcheson, James Lawson, Manuel Pinuela Rangel, David Christopher Yates
Life of this patent
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Abstract
The invention relates to an inductive power transfer transmitter comprising class-E amplifier driver arranged to drive a primary tank circuit including a transmitter coil, in which the driver frequency is tuned to drive the primary tank circuit when the primary tank circuit is in an unloaded condition.
Claims17
An inductive power transfer transmitter comprising:
- a class-E amplifier driver arranged to drive a primary tank circuit including a transmitter coil, in which the driver frequency is tuned to drive the primary tank circuit at semi-resonant frequency when the primary tank circuit is in an unloaded condition,
- wherein the primary tank circuit comprises the transmitter coil and a first capacitor arranged in parallel with the transmitter coil, and
- the inductive power transfer transmitter further comprises a second capacitor connecting the class-E amplifier driver to the primary tank circuit.
An inductive power transfer receiver comprising a receiver tank circuit and rectifier, in which the tank circuit is tuned for resonance in the absence of a remote load, wherein the rectifier comprises:
- a first diode having a first terminal and a second terminal, and
- connected between the first terminal and the second terminal of the first diode, a capacitor or a second diode.
An inductive power transfer receiver comprising a planar spiral Litz wire configuration woven or mounted on a flexible substrate, the flexible substrate being Kapton, cloth, or a thin PCB material having a thickness of 100 μm or less.
An inductive power transfer system comprising:
- an inductive power transfer transmitter comprising a class-E amplifier driver arranged to drive a primary tank circuit including a transmitter coil, in which the driver frequency is tuned to drive the primary tank circuit at semi-resonant frequency when the primary tank circuit is in an unloaded condition,
- wherein the primary tank circuit comprises the transmitter coil and a first capacitor arranged in parallel with the transmitter coil, and
- the inductive power transfer transmitter further comprises a second capacitor connecting the class-E amplifier driver to the tank circuit;
- and
- an inductive power transfer receiver comprising a receiver tank circuit and rectifier, in which the tank circuit is tuned for resonance in the absence of a remote load.
Dependencies are inferred from the claim text.