Wireless Powering Device, an Energiable Load, a Wireless System and a Method For a Wireless Energy Transfer
First Claim
1. A wireless resonant powering device (1) for a wireless energy transfer to an energizable load (11) comprising an inductor winding (13), said device comprising:
- a resonant circuit (5), wherein said resonant circuit comprises a first inductor winding (3) conceived to generate a magnetic flux in a volume, whereby, in operation, the inductor winding is conceived to be positioned to intercept at least a portion of said flux in said volume, said resonant powering device (1) further comprising;
a driving means (6) connectable to the resonant circuit (5) and arranged to operate substantially on a pre-selected operational frequency, such that, in operation, an induced voltage in the inductor winding is independent of the magnetic coupling between the first inductor winding (3) and the inductor winding (13).
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Accused Products
Abstract
A wireless resonant powering device 1 according to the invention comprises a first inductor winding 3, which is arranged to form a transformer 9 with the inductor winding 13 of the energizable load 11. The first inductor winding 3 is arranged to form a resonant circuit 5, which may comprise a suitable plurality of electric capacitances and coils. The components of the resonant circuit 5 are selected such that the magnetic energy received by the inductor winding 13 damps the energy flow in the resonant circuit so that the induced voltage in the inductor winding 13 is substantially constant and is independent of the magnetic coupling between the first inductor winding 3 and the inductor winding 13 at the operating frequency of the driving means 6. The resonant circuit is driven by the driving means 6, comprising a control unit 6c arranged to induce an alternating voltage between a first semiconductor switch 6a and a second semiconductor switch 6b. At the output of the transformer 9 an alternating voltage is generated, which is rectified to a DC-voltage by a diode rectifier, filtered by an output capacitance. The resonant circuit 5 is operable on its coupling independent point by the driving means 6. This figure schematically illustrates a situation, where a variable coupling between the first inductor winding 3 and the inductor winding 13 exists. The invention further relates to a wireless inductive powering device, an energizable load, a wireless system and a method for wireless power transfer.
59 Citations
38 Claims
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1. A wireless resonant powering device (1) for a wireless energy transfer to an energizable load (11) comprising an inductor winding (13), said device comprising:
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a resonant circuit (5), wherein said resonant circuit comprises a first inductor winding (3) conceived to generate a magnetic flux in a volume, whereby, in operation, the inductor winding is conceived to be positioned to intercept at least a portion of said flux in said volume, said resonant powering device (1) further comprising;
a driving means (6) connectable to the resonant circuit (5) and arranged to operate substantially on a pre-selected operational frequency, such that, in operation, an induced voltage in the inductor winding is independent of the magnetic coupling between the first inductor winding (3) and the inductor winding (13). - View Dependent Claims (2, 3, 4, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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5. A wireless inductive powering device (40) for a wireless energy transfer to an energizable load (57) comprising an inductor winding (52), said wireless inductive powering device comprising a transformer with
a softmagnetic core (42,44,49); a first inductor winding (46) accommodated in the softmagnetic core and being conceived to interact with the inductor winding, when the inductor winding is positioned in a vicinity of said core for purposes of forming the transformer, wherein the softmagnetic core comprises mutually displaceable a first portion of the core (42,44) and a second portion of the core (49) to alternate between a closed magnetic circuit and an open magnetic circuit. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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33. A method of a wireless energy transfer from a wireless resonant powering device to an energizable load comprising an inductor winding, said method comprising the steps of:
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providing a wireless resonant powering device arranged with a first inductor winding, whereby said first inductor forms a part of a resonant circuit conceived to generate a magnetic flux in a volume;
positioning the inductor winding so that it intercepts at least a portion of the magnetic flux;
connecting a driving means to the resonant circuit, whereby the driving means is arranged to operate on a pre-selected operational frequency, such that, in operation, an induced voltage in the inductor winding is independent of the magnetic coupling between the first inductor winding and the inductor winding, operating the resonant circuit on the operational frequency to wirelessly transfer energy from the first inductor winding to the inductor winding. - View Dependent Claims (35, 36, 37)
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34. A method of a wireless energy transfer from a wireless inductive powering device to an energizable load comprising an inductor winding, said method comprising the steps of:
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providing a wireless inductive powering device arranged with a first inductor winding, whereby the inductor winding and the first inductor winding are conceived to form a transformer;
arranging the first inductor winding in a vicinity of a part of a softmagnetic core for purposes of forming the transformer, wherein said core comprises mutually displaceable a first portion of the core and a second portion of the core alternating between a closed magnetic circuit and an open magnetic circuit;
positioning the inductor winding between the first portion of the core and the second portion of the core for a wireless energy transfer to the energizable load. - View Dependent Claims (38)
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Specification