Method and apparatus for periodically changing frequency in wireless power transfer
First Claim
1. A wireless power transfer apparatus, comprising:
- a power converter configured to generate a wireless power signal for transferring wireless power based on a carrier signal; and
a controller configured to;
determine a sweep frequency range and a sweep period in which a frequency of the carrier signal is changed across the sweep frequency range, andcontrol the power converter to periodically change the frequency of the wireless power signal by periodically changing the frequency of the carrier signal based on the determined sweep frequency range and the sweep period,wherein the sweep period is changed to represent data to communicate to a wireless power receiving apparatus.
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Accused Products
Abstract
Disclosed are a wireless power transfer apparatus, and a method of changing a frequency in the wireless power transfer apparatus, in which the magnetic field intensity in a specific frequency band is decreased by periodically changing the frequency of a wireless power signal, so that it is possible to spread a frequency spectrum. To this end, a wireless power transfer apparatus includes a power transmission unit and a control unit. The power transmission unit generates a wireless power signal for transferring wireless power based on a carrier signal. The control unit determines a sweep frequency range and sweep period for the carrier signal and controls the power transmission unit to periodically change the frequency of the wireless power signal by periodically changing the frequency of the carrier signal based on the determined sweep frequency range and sweep period.
27 Citations
32 Claims
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1. A wireless power transfer apparatus, comprising:
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a power converter configured to generate a wireless power signal for transferring wireless power based on a carrier signal; and a controller configured to; determine a sweep frequency range and a sweep period in which a frequency of the carrier signal is changed across the sweep frequency range, and control the power converter to periodically change the frequency of the wireless power signal by periodically changing the frequency of the carrier signal based on the determined sweep frequency range and the sweep period, wherein the sweep period is changed to represent data to communicate to a wireless power receiving apparatus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A method of changing a frequency in a wireless power transfer apparatus, the method comprising:
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generating a wireless power signal for transferring wireless power based on a carrier signal; determining a sweep frequency range and a sweep period in which a frequency of the carrier signal is changed across the sweep frequency range; and periodically changing the frequency of the wireless power signal by periodically changing the frequency of the carrier signal based on the determined sweep frequency range and the sweep period, wherein the sweep period is changed to represent data to communicate to a wireless power receiving apparatus. - View Dependent Claims (30, 31, 32)
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Specification