Wireless power transfer system for wirelessly transferring electric power in noncontact manner by utilizing resonant magnetic field coupling
First Claim
1. A frequency controller apparatus for use in a wireless power transmitter apparatus configured to wirelessly transmit an inputted power from a power transmitting antenna including a first resonant circuit, toward a power receiving antenna that includes a second resonant circuit and is electromagnetically coupled to the power transmitting antenna at a predetermined transmission frequency, the frequency controller apparatus comprising:
- a controller configured to change the transmission frequency during a power transfer,wherein the controller sets a decrease amount when decreasing the transmission frequency, so that the decrease amount is smaller than an increase amount when the transmission frequency is increased.
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Accused Products
Abstract
There is provided a frequency controller apparatus for use in a wireless power transmitter apparatus configured to wirelessly transmit an inputted power from a power transmitting antenna that includes a first resonant circuit, toward a power receiving antenna that includes a second resonant circuit and is electromagnetically coupled to the power transmitting antenna at a predetermined transmission frequency. The frequency controller apparatus includes a controller for changing the transmission frequency during a power transfer, and the controller sets a decrease amount when decreasing the transmission frequency, so that the decrease amount is smaller than an increase amount when the transmission frequency is increased.
12 Citations
6 Claims
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1. A frequency controller apparatus for use in a wireless power transmitter apparatus configured to wirelessly transmit an inputted power from a power transmitting antenna including a first resonant circuit, toward a power receiving antenna that includes a second resonant circuit and is electromagnetically coupled to the power transmitting antenna at a predetermined transmission frequency, the frequency controller apparatus comprising:
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a controller configured to change the transmission frequency during a power transfer, wherein the controller sets a decrease amount when decreasing the transmission frequency, so that the decrease amount is smaller than an increase amount when the transmission frequency is increased.
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2. A wireless power transmitter apparatus comprising:
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a frequency controller apparatus; a power transmitting antenna; and a power transmitter circuit configured to convert an inputted power into a power having the transmission frequency, and to output a resulting power to the power transmitting antenna, wherein the frequency controller apparatus is provided for use in a wireless power transmitter apparatus configured to wirelessly transmit an inputted power from the power transmitting antenna including a first resonant circuit, toward a power receiving antenna that includes a second resonant circuit and is electromagnetically coupled to the power transmitting antenna at a predetermined transmission frequency, wherein the frequency controller apparatus comprises a controller configured to change the transmission frequency during a power transfer, and wherein the controller sets a decrease amount when decreasing the transmission frequency, so that the decrease amount is smaller than an increase amount when the transmission frequency is increased. - View Dependent Claims (3)
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4. A wireless power transfer system comprising:
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a wireless power transmitter apparatus; and a power receiving antenna, wherein the wireless power transmitter apparatus comprises; a frequency controller apparatus; a power transmitting antenna; and a power transmitter circuit configured to convert an inputted power into a power having the transmission frequency, and to output a resulting power to the power transmitting antenna, wherein the frequency controller apparatus is provided for use in a wireless power transmitter apparatus configured to wirelessly transmit an inputted power from the power transmitting antenna including a first resonant circuit, toward the power receiving antenna that includes a second resonant circuit and is electromagnetically coupled to the power transmitting antenna at a predetermined transmission frequency, wherein the frequency controller apparatus comprises a controller configured to change the transmission frequency during a power transfer, and wherein the controller sets a decrease amount when decreasing the transmission frequency, so that the decrease amount is smaller than an increase amount when the transmission frequency is increased. - View Dependent Claims (5)
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6. A power transfer method for use in a wireless power transmitter apparatus configured to wirelessly transmit an inputted power from a power transmitting antenna including a first resonant circuit, toward a power receiving antenna that includes a second resonant circuit and is electromagnetically coupled to the power transmitting antenna at a predetermined transmission frequency, the power transfer method comprising:
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a control step of changing the transmission frequency during a power transfer, wherein the control step includes a step of setting a decrease amount when decreasing the transmission frequency, so that the decrease amount is smaller than an increase amount when the transmission frequency is increased.
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Specification