POWER SUPPLY SYSTEM, AND FIXED BODY AND MOVABLE BODY THEREFOR

• US 20150061405A1
• Filed: 11/07/2014
• Published: 03/05/2015
• Est. Priority Date: 02/20/2009
• Status: Active Grant

• Current Assignee: Exh Corporation
• Original Assignee: Exh Corporation
• Inventors: Harakawa, Kenichi, Oshi, Yuuji
• Granted Patent: US 9,275,792 B2
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H02J 50/05 using capacitive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/402 the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices

Abstract

Provided is a power supply system which makes it possible to stably supply power regardless of changes in placement of electrodes. The power supply system for supplying power to a load (24). The fixed body (10) includes: a first power-transmitting electrode (12) and second power-transmitting electrode (13); and an AC power supply (11) to supply AC power to the first power-transmitting electrode (12) and second power-transmitting electrode (13). The movable body (20) includes: a first power-receiving electrode (21a) and second power-receiving electrode (21b) to form a first coupling capacitor (30) and a second coupling capacitor (31), respectively, by being placed in a manner opposed to and not contacting corresponding ones of the first power-transmitting electrode (12) and second power-transmitting electrode (13) while facing one side of an interface, the one side not being faced by these power-transmitting electrodes, and a first capacitor (22a) and first coil (22b) connected to one another in parallel between the first power-receiving electrode (21a) and second power-receiving electrode (21b). The AC power supply (11) transmits power to the load (24) via the first and second coupling capacitors under a condition that causes parallel resonance between the first capacitor (22a) and first coil (22b).

Claims

1-10. -10. (canceled)

11. A power supply system for supplying power from a fixed body placed in a power-supplying region, via a movable body placed in a power-consuming region, to a predetermined load,

wherein the fixed body comprises:

a first power-transmitting electrode and second power-transmitting electrode to which AC power is supplied and are configured to be placed at a position in the neighborhood of the interface between the power-supplying region and power-consuming region; and

an AC power supply to supply power to the first power-transmitting electrode and second power-transmitting electrode,

wherein the movable body comprises;

a first power-receiving electrode and second power-receiving electrode to be placed in a manner opposed to and not contacting the first power-transmitting electrode and second power-transmitting electrode with the interface interposed there between;

a first capacitor and first coil connected to each other in parallel between the first power-receiving electrode and second power-receiving electrode,

wherein, while a first coupling capacitor is formed when one of the first power-receiving electrode and second power-receiving electrode is placed in a manner opposed to the first power-transmitting electrode, a second coupling capacitor is formed when the other one of the first power-receiving electrode and second power-receiving electrode is placed in a manner opposed to the second power-transmitting electrode,

wherein the AC power supply transmits power to the load via the first and second coupling capacitors under a condition that causes parallel resonance between the first capacitor and first coil,

wherein the movable body comprises a fourth coil which is arranged parallel to and a predetermined distance apart from the first coil; and

wherein the first coil and the fourth coil are arranged in a manner that enables transformation of the voltages thereof due to mutual induction.

18. A movable body to be placed in a power-consuming region and to supply power to a predetermined load, the power having been supplied from a fixed body placed in a power-supplying region, comprising:

a first power-receiving electrode and second power-receiving electrode, the first power-receiving electrode and second power-receiving electrode being a set of power-receiving electrodes to be placed in a manner opposed to and not contacting a first power-transmitting electrode or second power-transmitting electrode and with the interface, of the power-supplying region and power-consuming region, having the pair of power-receiving electrodes on one side and the first power-transmitting electrode and second power-transmitting electrode on the other side, the first power-transmitting electrode and second power-transmitting electrode being those arranged in the fixed body and to which AC power is supplied, wherein, while a first coupling capacitor is formed when one of the paired power-receiving electrodes is placed in a manner opposed to the first power-transmitting electrode, a second coupling capacitor is formed when the other one of the paired power-receiving electrodes is placed in a manner opposed to the second power-transmitting electrode; and

a first capacitor and first coil connected to each other in parallel between the first and second power-receiving electrodes,

wherein power is transmitted to the load via the first and second coupling capacitors under a condition that causes parallel resonance between the first capacitor and first coil;

wherein the movable body comprises a fourth coil which is arranged parallel to and a predetermined distance apart from the first coil;

wherein the first coil and the fourth coil are arranged in a manner that enables transformation of the voltages thereof due to mutual induction.

19. A fixed body placed in a power-supplying region and configured to supply power to a predetermined load via a movable body placed in a power-consuming region, comprising:

a plurality of first power-transmitting electrodes and plurality of second power-transmitting electrodes, which form capacitors with at least one set of power-receiving electrodes arranged in the movable body when being placed in a manner opposed to and not contacting this pair of power-receiving electrodes and with the interface, of the power-supplying region and power-consuming region, having the pluralities of first power-transmitting electrodes and second power-transmitting electrodes on one side and the paired power-receiving electrodes on the other; and

an AC power supply to supply power to the first and second power-transmitting electrodes,

wherein the fixed body comprises a second capacitor and second coil connected to each other in parallel between the first and second power-transmitting electrode;

wherein the fixed body comprises a third capacitor and third coil connected to each other in parallel in such a manner that the third capacitor and third coil are laid parallel to the first and second power-transmitting electrodes and to the second capacitor and second coil;

wherein the third coil is arranged parallel to and a predetermined distance apart from the second coil;

wherein the second coil and the third coil are arranged in a manner that enables transformation of the voltages thereof due to mutual induction;

wherein the AC power supply supplies power to the load under a condition that causes parallel resonance between the second capacitor and second coil; and

wherein the AC power supply supplies power to the load via the third coil under a condition that causes parallel resonance between the third capacitor and third coil.