Power supply control in wireless power transfer systems
First Claim
1. An apparatus for wireless power transfer, the apparatus comprisinga direct current (DC) power source having an adjustable output voltage;
- an inverter configured to convert the direct current to an alternating current;
an LCL network having a first inductive element configured to receive the alternating current from the inverter and generate a magnetic field; and
at least one controller configured to reduce at least one distortion signal in the alternating current while maintaining the alternating current in the first inductive element substantially constant by directly controlling at least the inverter.
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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 an apparatus for use with a wireless power transfer transmitter device comprising a first inductive element for generating a magnetic field, is provided. The apparatus comprises a direct current (DC) power source having an adjustable output voltage. The apparatus also comprises an inverter configured to convert the adjustable output voltage of the DC power source to alternating current. The apparatus also comprises at least one controller configured to receive an indication of current in the first inductive element and control the output voltage of the DC power source in response to the indication of current in the first inductive element. The apparatus reduces distortion signals in the alternating current output of the inverter while maintaining current in the inductive element substantially constant.
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Citations
36 Claims
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1. An apparatus for wireless power transfer, the apparatus comprising
a direct current (DC) power source having an adjustable output voltage; -
an inverter configured to convert the direct current to an alternating current; an LCL network having a first inductive element configured to receive the alternating current from the inverter and generate a magnetic field; and at least one controller configured to reduce at least one distortion signal in the alternating current while maintaining the alternating current in the first inductive element substantially constant by directly controlling at least the inverter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of controlling wireless power transfer, the method comprising:
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providing to an inverter a direct current having an adjustable output voltage; converting the direct current to an alternating current; supplying the alternating current to a first inductive element of an LCL network; controlling the adjustable output voltage of the direct current to reduce at least one distortion signal in the alternating current while maintaining the alternating current substantially constant in the first inductive element by directly controlling at least the inverter; and generating a magnetic field for transferring wireless power to an inductive element. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. An apparatus for wireless power transfer, the apparatus comprising
means for providing a direct current having an adjustable output voltage; -
means for converting the direct current to an alternating current; means for receiving the alternating current from the means for converting; means for generating a magnetic field in an LCL network; and means for reducing at least one distortion signal in the alternating current while maintaining the alternating current substantially constant, in the means for receiving the alternating current by directly controlling at least the means for converting. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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Specification