WIRELESS POWER TRANSMISSION APPARATUS AND WIRELESS POWER TRANSMISSION SYSTEM
First Claim
1. A wireless power transmission apparatus comprising:
- at least one transmission antenna that is capable of being electromagnetically coupled with reception antennas included in each of a plurality of wireless power reception apparatuses, each of the reception antennas including a power reception coil, and that transmits high-frequency power to the plurality of the wireless power reception apparatuses;
an inverter circuit that generates the high-frequency power and supply the generated high-frequency power to the at least one transmission antenna;
a receiving circuit that receives a voltage value of each power reception coil from each of the plurality of the wireless power reception apparatuses;
a control circuit that controls a transmission condition including a frequency or an amplitude of the high-frequency power supplied from the inverter circuit, depending on the received voltage value,wherein in a case that the at least one transmission antenna is transmitting the high-frequency power to at least a first wireless power reception apparatus and the control circuit detects that at least a second wireless power reception apparatus is newly electromagnetically coupled with the at least one transmission antenna,the control circuit changes one of the frequency or the amplitude of the high-frequency power depending on the voltage value received from each of at least the first and second wireless power reception apparatuses, to regulate the voltage value of each power reception coil included in each of at least the first and second wireless power reception apparatuses to be equal to or lower than an upper limit value of the voltage value, circuit elements included in each of the first and second wireless power reception apparatuses being durable for the upper limit value.
1 Assignment
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Accused Products
Abstract
In a case that the at least one transmission antenna is transmitting a high-frequency power to at least a first wireless power reception apparatus and it is detected that at least a second wireless power reception apparatus is newly electromagnetically coupled with at least one transmission antenna, a wireless power transmission apparatus changes one of a frequency or a amplitude of the high-frequency power depending on a voltage value received from each of at least the first and second wireless power reception apparatuses, to regulate the voltage value of each power reception coil included in each of at least the first and second wireless power reception apparatuses to be equal to or lower than an upper limit value of the voltage value, circuit elements included in each of the first and second wireless power reception apparatuses being durable for the upper limit value.
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Citations
7 Claims
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1. A wireless power transmission apparatus comprising:
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at least one transmission antenna that is capable of being electromagnetically coupled with reception antennas included in each of a plurality of wireless power reception apparatuses, each of the reception antennas including a power reception coil, and that transmits high-frequency power to the plurality of the wireless power reception apparatuses; an inverter circuit that generates the high-frequency power and supply the generated high-frequency power to the at least one transmission antenna; a receiving circuit that receives a voltage value of each power reception coil from each of the plurality of the wireless power reception apparatuses; a control circuit that controls a transmission condition including a frequency or an amplitude of the high-frequency power supplied from the inverter circuit, depending on the received voltage value, wherein in a case that the at least one transmission antenna is transmitting the high-frequency power to at least a first wireless power reception apparatus and the control circuit detects that at least a second wireless power reception apparatus is newly electromagnetically coupled with the at least one transmission antenna, the control circuit changes one of the frequency or the amplitude of the high-frequency power depending on the voltage value received from each of at least the first and second wireless power reception apparatuses, to regulate the voltage value of each power reception coil included in each of at least the first and second wireless power reception apparatuses to be equal to or lower than an upper limit value of the voltage value, circuit elements included in each of the first and second wireless power reception apparatuses being durable for the upper limit value. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification