METHOD FOR CONTROLLING CHARGING POWER AND WIRELESS CHARGING APPARATUS FOR THE SAME
First Claim
1. A wireless charging apparatus for controlling charging power, in charging a target to be charged, the apparatus comprising:
- a Voltage Control Oscillator (VCO) for outputting a resonant frequency corresponding to a first power transmission control value;
a wireless power transmitter for outputting power determined by the resonant frequency to the target to be charged;
a first resonator connected to the wireless power transmitter for outputting a first power value at a lower-limit frequency of a predetermined frequency band;
a second resonator connected to the wireless power transmitter for outputting a second power value at an upper-limit frequency of the predetermined frequency band; and
a controller for adjusting the first power transmission control value for adjusting the resonant frequency if either the first power value or the second power value from the first and second resonators exceeds a power limit.
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Accused Products
Abstract
Disclosed is a method for advance detection of output power, before arrival at a boundary frequency between an inband and an outband during frequency tracking in a wireless charging apparatus, the wireless charging apparatus including a first resonator resonating at a lower-limit frequency of the inband and a second resonator resonating at an upper-limit frequency of the inband, to adaptively adjust the frequency based on the power values output from the first and second resonators, and to determine a power transmission control value corresponding to the adjusted frequency, thereby enabling frequency control and power control within the inband.
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Citations
15 Claims
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1. A wireless charging apparatus for controlling charging power, in charging a target to be charged, the apparatus comprising:
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a Voltage Control Oscillator (VCO) for outputting a resonant frequency corresponding to a first power transmission control value; a wireless power transmitter for outputting power determined by the resonant frequency to the target to be charged; a first resonator connected to the wireless power transmitter for outputting a first power value at a lower-limit frequency of a predetermined frequency band; a second resonator connected to the wireless power transmitter for outputting a second power value at an upper-limit frequency of the predetermined frequency band; and a controller for adjusting the first power transmission control value for adjusting the resonant frequency if either the first power value or the second power value from the first and second resonators exceeds a power limit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for controlling charging power in a wireless charging apparatus with a wireless power transmitter, the method comprising:
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outputting power determined by a resonant frequency to a target to be charged by the wireless power transmitter; monitoring a first power value at a lower-limit frequency and a second power value at an upper-limit frequency from the wireless power transmitter while outputting the power; determining whether the first power value or the and second power value exceeds a power limit; and adjusting the resonant frequency if the first power value or the second power value exceeds the power limit. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification