Methods and apparatus for reducing flux cancellation in ferrite of double couple inductive power transfer systems
First Claim
1. An apparatus for transmitting charging power wirelessly to a load, the apparatus comprising:
- at least one ferrite structure comprising;
a first ferrite portion,a second ferrite portion comprising at least a first ferrite leg, a second ferrite leg, and a third ferrite leg, each physically separated from the first ferrite portion by a first distance, anda third ferrite portion positioned between the second ferrite leg and the first ferrite portion and physically contacting the second ferrite leg;
a coil wound around the second ferrite leg and configured to generate an alternating current under influence of an alternating magnetic field, the coil comprising at least a first winding wound in a first layer around the second ferrite leg and a second winding wound in a second layer around the first layer, the first layer connected to the second layer by a capacitor; and
a control coil wound in a third layer around the coil.
2 Assignments
0 Petitions
Accused Products
Abstract
According to some implementations, an apparatus for transmitting charging power wirelessly to a load is provided. The apparatus comprises at least one ferrite structure comprising a first ferrite portion, a second ferrite portion comprising at least a first ferrite leg, a second ferrite leg, and a third ferrite leg, each physically separated from the first ferrite portion by a first distance, and a third ferrite portion positioned between the second ferrite leg and the first ferrite portion and physically contacting the second ferrite leg. The at least one ferrite structure further comprises a coil wound around the second ferrite leg and configured to generate an alternating current under influence of an alternating magnetic field.
17 Citations
30 Claims
-
1. An apparatus for transmitting charging power wirelessly to a load, the apparatus comprising:
-
at least one ferrite structure comprising; a first ferrite portion, a second ferrite portion comprising at least a first ferrite leg, a second ferrite leg, and a third ferrite leg, each physically separated from the first ferrite portion by a first distance, and a third ferrite portion positioned between the second ferrite leg and the first ferrite portion and physically contacting the second ferrite leg; a coil wound around the second ferrite leg and configured to generate an alternating current under influence of an alternating magnetic field, the coil comprising at least a first winding wound in a first layer around the second ferrite leg and a second winding wound in a second layer around the first layer, the first layer connected to the second layer by a capacitor; and a control coil wound in a third layer around the coil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A method for transmitting charging power wirelessly to a load, the method comprising:
-
generating an alternating current via a first coil under influence of a first alternating magnetic field, the first coil wound around at least one portion of a ferrite structure comprising; a first ferrite portion, a second ferrite portion comprising at least a first ferrite leg, a second ferrite leg, and a third ferrite leg, each physically separated from the first ferrite portion by a first distance, and a third ferrite portion positioned between the second ferrite leg and the first ferrite portion and physically contacting the second ferrite leg; and wirelessly transmitting power via a second alternating magnetic field generated by driving a second coil with the alternating current, wherein one of the first and second coils comprises at least a first winding wound in a first layer around the second ferrite lea and a second winding wound in a second layer around the first layer and has a control coil wound in a third layer around the first or second coil comprising the first and second windings, the first layer connected to the second layer by a capacitor. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
-
-
22. An apparatus for transmitting charging power wirelessly to a load, the apparatus comprising:
-
first means for channeling magnetic flux; second means for channeling magnetic flux comprising at least a first leg, a second leg, and a third leg, each physically separated from the first means for channeling magnetic flux by a first distance, and the second leg being located between the first leg and the third leg; third means for channeling magnetic flux positioned between the second leg and the first means for channeling magnetic flux and physically contacting the second leg; means for generating an alternating current under influence of an alternating magnetic field wound around the second leg, the generating means comprising at least a first winding wound in a first layer around the second ferrite leg and a second winding wound in a second layer around the first layer, the first layer connected to the second layer by a capacitor; and means for reducing or preventing generation of the alternating current wound in a third layer around the means for generating an alternating current under influence of an alternating magnetic field. - View Dependent Claims (23, 24, 25)
-
-
26. A method for manufacturing a double couple transformer configured to transmit charging power wirelessly to a vehicle, the method comprising:
-
providing at least one ferrite structure comprising; a first ferrite portion, a second ferrite portion comprising at least a first ferrite leg, a second ferrite leg, and a third ferrite leg, each physically separated from the first ferrite portion by a first distance, and a third ferrite portion positioned between the second ferrite leg and the first ferrite portion and physically contacting the second ferrite leg; winding a coil around the second ferrite leg such that the coil is configured to generate an alternating current under influence of an alternating magnetic field, the coil comprising at least a first winding wound in a first layer around the second ferrite leg and a second winding wound in a second layer around the first layer, the first layer connected to the second layer by a capacitor; and winding a control coil in a third layer around the coil. - View Dependent Claims (27, 28, 29, 30)
-
Specification