Relay device of wireless power transmission system
First Claim
1. A relay device employed in a resonance wireless power transmission system, wherein the resonance wireless power transmission system includes a wireless power supply apparatus having a transmission antenna structured to transmit a power signal and a wireless power receiving apparatus having a receiving antenna structured to receive the power signal, and a degree of coupling between the transmission antenna and the receiving antenna changes with time, and wherein the relay device is separately positioned from the wireless power supply apparatus and the wireless power receiving apparatus respectively, and the relay device functions to relay power between the transmitting antenna and the receiving antenna,the relay device comprising:
- a relay antenna comprising a power relay coil; and
an automatic tuning assist circuit coupled with the relay antenna,wherein the automatic tuning assist circuit comprises;
a first terminal and a second terminal coupled with the relay antenna;
N (N represents an integer) auxiliary capacitors;
a plurality of switches each of which is arranged between two terminals from among the first terminal, the second terminal, and the terminals of the aforementioned N auxiliary capacitors; and
a controller configured to switch on and off the plurality of switches in synchronization with an electric power signal transmitted from a wireless power supply apparatus, wherein the plurality of switches includes a first switch and a second switch,and wherein the N auxiliary capacitors include a first auxiliary capacitor,and wherein the first switch and the first auxiliary capacitor are arranged in series between the first terminal and the second terminal,and wherein the second switch is arranged between the first terminal and the second terminal, in parallel with the first switch and the first auxiliary capacitor.
2 Assignments
0 Petitions
Accused Products
Abstract
A relay antenna includes a power relay coil. An automatic tuning assist circuit is coupled with the relay antenna. The automatic tuning assist circuit has first and second terminals coupled with the relay antenna. Multiple switches are arranged together with N (N represents an integer) auxiliary capacitors between the first terminal and the second terminal. A controller is configured to switch on and off each of the multiple switches in synchronization with an electric power signal transmitted from a wireless power supply apparatus.
7 Citations
10 Claims
-
1. A relay device employed in a resonance wireless power transmission system, wherein the resonance wireless power transmission system includes a wireless power supply apparatus having a transmission antenna structured to transmit a power signal and a wireless power receiving apparatus having a receiving antenna structured to receive the power signal, and a degree of coupling between the transmission antenna and the receiving antenna changes with time, and wherein the relay device is separately positioned from the wireless power supply apparatus and the wireless power receiving apparatus respectively, and the relay device functions to relay power between the transmitting antenna and the receiving antenna,
the relay device comprising: -
a relay antenna comprising a power relay coil; and an automatic tuning assist circuit coupled with the relay antenna, wherein the automatic tuning assist circuit comprises; a first terminal and a second terminal coupled with the relay antenna; N (N represents an integer) auxiliary capacitors; a plurality of switches each of which is arranged between two terminals from among the first terminal, the second terminal, and the terminals of the aforementioned N auxiliary capacitors; and a controller configured to switch on and off the plurality of switches in synchronization with an electric power signal transmitted from a wireless power supply apparatus, wherein the plurality of switches includes a first switch and a second switch, and wherein the N auxiliary capacitors include a first auxiliary capacitor, and wherein the first switch and the first auxiliary capacitor are arranged in series between the first terminal and the second terminal, and wherein the second switch is arranged between the first terminal and the second terminal, in parallel with the first switch and the first auxiliary capacitor. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A relay device employed in a resonance wireless power transmission system, wherein the resonance wireless power transmission system includes a wireless power supply apparatus having a transmission antenna structured to transmit a power signal and a wireless power receiving apparatus having a receiving antenna structured to receive the power signal, and a degree of coupling between the transmission antenna and the receiving antenna changes with time,
and wherein the relay device is separately positioned from the wireless power supply apparatus and the wireless power receiving apparatus respectively, and the relay device functions to relay power between the transmitting antenna and the receiving antenna, the relay device comprising: -
a relay antenna comprising a power relay coil; and an automatic tuning assist circuit coupled with the relay antenna; wherein the automatic tuning assist circuit comprises; a first terminal and a second terminal coupled with the relay antenna; N (N represents an integer) auxiliary capacitors; a plurality of switches each of which is arranged between two terminals from among the first terminal the second terminal and the terminals of the aforementioned N auxiliary capacitors; and a controller configured to switch on and off the plurality of switches in synchronization with an electric power signal transmitted from a wireless power supply apparatus, wherein the plurality of switches includes a first switch, a second switch, a third switch, and a fourth switch, and wherein the N auxiliary capacitors include a first auxiliary capacitor, and wherein the first switch and the second switch are arranged in series between the first terminal and the second terminal, and wherein the third switch and the fourth switch are sequentially arranged in series between the first terminal and the second terminal, forming a path in parallel with the first switch and the second switch, and wherein the first auxiliary capacitor is arranged between a connection node that connects the first switch and the second switch and a connection node that connects the third switch and the fourth switch. - View Dependent Claims (9, 10)
-
Specification