SYSTEM AND METHOD FOR POWER OUTPUT CONTROL IN WIRELESS POWER TRANSFER SYSTEMS
First Claim
1. A circuit for a wireless power receiver device, the circuit comprising:
- an inductive element configured to receive wireless power from a magnetic field associated with a wireless power transmitter device, the received wireless power inducing an alternating current in the inductive element;
an output interface electrically coupled to the inductive element and configured to provide current to a load; and
a controller configured to maintain the alternating current in the inductive element substantially constant as a voltage across the load varies.
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Accused Products
Abstract
This disclosure provides systems, methods and apparatus for wireless power transfer and particularly wireless power transfer to remote system such as electric vehicles. In one aspect a circuit for wireless power transfer is provided. The circuit comprises an inductive element for receiving wireless power from a magnetic field associated with a wireless power transfer transmitter device. The circuit further comprises an output configured to be connected to a load. The circuit further comprises a voltage detector configured to detect the voltage across the load. The circuit further comprises at least one switching element between the inductive element and the output. The circuit further comprises a controller configured to maintain a current in the inductive element substantially constant as the voltage detected across the load varies.
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Citations
26 Claims
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1. A circuit for a wireless power receiver device, the circuit comprising:
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an inductive element configured to receive wireless power from a magnetic field associated with a wireless power transmitter device, the received wireless power inducing an alternating current in the inductive element; an output interface electrically coupled to the inductive element and configured to provide current to a load; and a controller configured to maintain the alternating current in the inductive element substantially constant as a voltage across the load varies. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of wireless power transfer, the method comprising:
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receiving wireless power from a magnetic field, the received wireless power inducing an alternating current in an inductive element; providing current to a load based on the alternating current in the inductive element; and maintaining the alternating current in the inductive element substantially constant as a voltage across the load varies. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. An apparatus for wireless power transfer, the apparatus comprising:
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means for receiving wireless power from a magnetic field associated with a wireless power transfer transmitter device, the received wireless power inducing an alternating current in an inductive element; means for providing current to a load; and means for maintaining the alternating current in the inductive element substantially constant as a voltage across the load varies. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26)
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Specification