JP2016032390A - Power supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power supply device capable of suppressing a decrease in the transmission efficiency of power from a power feeding section to a power receiving section, when the relative position of a power receiving coil to a power feeding coil changes, without performing complex control.SOLUTION: A power supply device 1 includes a coil set 4 consisting of a power feeding coil 2 and a power receiving coil 3, and a coil set 7 consisting of a power feeding coil 5 and a power receiving coil 6. The power feeding coils 2, 5 are held by a power feeding coil holding part 11, and the power receiving coils 3, 6 are held by a power receiving coil holding part 10, the relative position of which to the power feeding coil holding part 11 changes with time in a certain direction. The power feeding coils 2, 5 and power receiving coils 3, 6 are arranged in the Z direction, i.e., the changing direction of the relative position of the power feeding coil holding part 10 to the power feeding coil holding part 11. When the axial center CL1 of the power feeding coil 2 matches the axial center CL2 of the power receiving coil 3, the axial center CL3 of the power feeding coil 5 is deviated from the axial center CL4 of the power receiving coil 6, in the Z direction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a non-contact type power supply device that supplies power to a power supply body by non-contact power transmission.

  Conventionally, a non-contact power transmission device that supplies power from the door frame side to the door-side electric lock in a non-contact manner is known (see, for example, Patent Document 1). The non-contact power transmission device described in Patent Literature 1 includes a power feeding side unit provided on the door frame side and a power receiving side unit provided on the door side. The power supply side unit includes a power supply side transmission unit that transmits power in a contactless manner by electromagnetic induction, and the power reception side unit includes a power reception side transmission unit that receives power transmitted from the power supply side transmission unit.

  Conventionally, a power supply device that supplies power in a non-contact manner to a battery system having a secondary resonance circuit including a secondary coil and a battery is known (see, for example, Patent Document 2). The power supply device described in Patent Document 2 includes a primary side resonance circuit including a primary coil, current detection means for detecting a primary side current of the primary side resonance circuit, and a primary side of the primary side resonance circuit. Voltage detection means for detecting the voltage, power factor calculation means for calculating the power factor based on the primary side current and the primary side voltage, and the power factor is increased when the power factor falls below a predetermined threshold. And a characteristic adjusting means for adjusting the characteristic of the primary side resonance circuit. Therefore, in this power supply device, it is possible to suppress a decrease in power transmission efficiency from the primary side resonance circuit to the secondary side resonance circuit when the relative positions of the primary coil and the secondary coil are shifted. It has become.

JP 2007-231567 A JP 2012-130173 A

  The relative position of the door (open door) attached to the door frame so as to be openable / closable changes with time. Specifically, the position of the door relative to the portion of the door frame on which the lock is engaged moves downward with time due to the influence of gravity acting on the door. Therefore, in the non-contact power transmission device described in Patent Document 1, the relative position in the vertical direction of the power receiving side transmission unit with respect to the power feeding side transmission unit is shifted with time, and the power from the power feeding side transmission unit to the power receiving side transmission unit is shifted. Transmission efficiency may be reduced. If the configuration of the power supply device described in Patent Document 2 is adopted for the non-contact power transmission device described in Patent Document 1, the relative position in the vertical direction of the power receiving side transmission unit with respect to the power supply side transmission unit is shifted over time. However, it may be possible to suppress a decrease in transmission efficiency of power from the power supply side transmission unit to the power reception side transmission unit. However, if the configuration of the power supply device described in Patent Document 2 is adopted in the non-contact power transmission device described in Patent Document 1, it is necessary to calculate the power factor, adjust the characteristics of the primary side resonance circuit, etc. Control of the contact power transmission device becomes complicated.

  Accordingly, an object of the present invention is to suppress a decrease in power transmission efficiency from the power feeding unit to the power receiving unit when the relative position of the power receiving coil with respect to the power feeding coil is changed without performing complicated control. Is to provide a simple power supply apparatus.

  In order to solve the above-described problems, a power feeding device according to the present invention is annularly wound with one feeding coil that is wound in a ring shape in a power feeding device that supplies power to a power-supplied body by non-contact power transmission. A plurality of coil sets including one power receiving coil are provided, the plurality of power feeding coils are held by the power feeding coil holding unit, and the plurality of power receiving coils have their relative positions with respect to the power feeding coil holding unit changed in a certain direction over time. When the first direction is the direction of change over time of the relative position of the power receiving coil holding unit with respect to the power receiving coil holding unit, the plurality of power feeding coils are arranged in the first direction, and the plurality of power receiving coils are arranged. When the coils are arranged in the first direction and the axis center of the winding of the power feeding coil and the axis center of the winding of the power receiving coil of at least one of the plurality of coil groups coincide with each other ,at least The center of winding of the feeding coil and the center of winding of the receiving coil of the coil sets are shifted in the first direction, and the relative position of the receiving coil holding part with respect to the feeding coil holding part changes over time. When at least one of the plurality of coil sets, the axis of winding of the feeding coil and the axis of winding of the receiving coil are separated in the first direction, at least one The coil set is characterized in that the axis of winding of the power feeding coil and the axis of winding of the receiving coil approach in the first direction.

  In the power feeding device of the present invention, the plurality of power feeding coils and the plurality of power receiving coils are arranged in a first direction that is a direction of change over time of the relative position of the power receiving coil holding unit with respect to the power feeding coil holding unit, When at least one of the coil sets, the axis of winding of the feeding coil coincides with the axis of winding of the receiving coil, at least one of the coils of the feeding coil The winding axis center and the winding axis center of the power receiving coil are shifted in the first direction. Further, in the present invention, the relative position of the power receiving coil holding portion with respect to the power feeding coil holding portion changes with time, and at least one of the plurality of coil sets has a center axis of winding of the power feeding coil. When the axis of winding of the power receiving coil moves away in the first direction, the axis of winding of the power feeding coil and the axis of winding of the power receiving coil of the at least one coil set are in the first direction. Approaching. Therefore, in the present invention, even if the relative position of the power receiving coil holding part with respect to the power feeding coil holding part changes with time, the reduction in the sum of the opposing areas of the power feeding coil and the power receiving coil of each of the plurality of coil sets is suppressed. It becomes possible to do. As a result, according to the present invention, it is possible to suppress a reduction in power transmission efficiency from the power feeding unit to the power receiving unit when the relative position of the power receiving coil with respect to the power feeding coil changes without performing complicated control. Become.

  In the present invention, even if the relative position of the power receiving coil holding portion with respect to the power feeding coil holding portion changes relatively in the first direction, the sum of the opposing areas of the power feeding coils and the power receiving coils of the plurality of coil sets is substantially constant. It is preferable that If comprised in this way, it will become possible to suppress the dispersion | variation in the transmission efficiency of the electric power from a power feeding part to a power receiving part when the relative position of the power receiving coil with respect to a power feeding coil changes.

  In order to solve the above-described problem, a power feeding device according to the present invention is a power feeding device that supplies power to a power supply body by non-contact power transmission, and is annularly wound with one or more power feeding coils that are wound in a ring. One or more coil sets each including a number of receiving coils that are rotated and greater in number than the number of feeding coils are provided. One or more feeding coils are held in a feeding coil holding unit, and a plurality of receiving coils are held by feeding coils. If the relative position of the power receiving coil holding part with respect to the feeding coil holding part is changed to the first direction, the power receiving coil holding part whose relative position with respect to the part changes in a certain direction with time, When the coil is provided, the plurality of power feeding coils are arranged in the first direction, the plurality of power receiving coils are arranged in the first direction, and the relative position of the power receiving coil holding unit with respect to the power feeding coil holding unit is set. Changes over time, and in one coil set, the axial center of winding of at least one feeding coil and the axial center of winding of at least one receiving coil are separated in the first direction. The axial center of winding of at least one power supply coil and the axial center of winding of at least one power receiving coil approach in the first direction.

  The power feeding device of the present invention includes one or more coil sets each including one or more power feeding coils and a larger number of power receiving coils than the number of power feeding coils. In the present invention, the plurality of power receiving coils are arranged in a first direction that is a direction of change with time of the relative position of the power receiving coil holding unit with respect to the power feeding coil holding unit, and the plurality of power feeding coils are provided. The plurality of power feeding coils are arranged in the first direction. Further, in the present invention, the relative position of the power receiving coil holding part with respect to the power feeding coil holding part changes with time, and in one coil set, at least one power supply coil winding axis center and at least one When the axial center of the winding of the power receiving coil is separated in the first direction, the axial center of the winding of at least one power supply coil and the axial center of the winding of at least one power receiving coil are in the first direction. Approaching. For this reason, in the present invention, even if the relative position of the power receiving coil holding part with respect to the power feeding coil holding part changes with time, it is possible to suppress a reduction in the facing area between the power feeding coil and the power receiving coil in the coil set. . As a result, according to the present invention, it is possible to suppress a reduction in power transmission efficiency from the power feeding unit to the power receiving unit when the relative position of the power receiving coil with respect to the power feeding coil changes without performing complicated control. Become.

  Furthermore, in order to solve the above-described problem, a power feeding device according to the present invention is a power feeding device that supplies power to a power-supplied body by non-contact power transmission. One or more coil sets including a number of feeding coils that are rotated and greater in number than the number of power receiving coils are provided, the plurality of power feeding coils are held in the power feeding coil holding unit, and the one or more power receiving coils are held in the power feeding coil If the relative position of the power receiving coil holding part with respect to the power supply coil holding part is held in the power receiving coil holding part that changes in a certain direction with time, and the direction of the time-dependent change of the relative position of the power receiving coil holding part with respect to the power feeding coil holding part is the first direction, When the coil is provided, the plurality of power receiving coils are arranged in the first direction, the plurality of power feeding coils are arranged in the first direction, and the power receiving coil holding unit is relative to the power feeding coil holding unit. The position of the coil changes with time, and in one coil set, the axis center of winding of at least one power supply coil and the axis center of winding of at least one power receiving coil are separated in the first direction. And the axial center of winding of at least 1 feeding coil and the axial center of winding of at least 1 receiving coil approach in the 1st direction, It is characterized by the above-mentioned.

  The power feeding device of the present invention includes one or more coil sets each including one or more power receiving coils and a larger number of power feeding coils than the number of power receiving coils. In the present invention, the plurality of power feeding coils are arranged in the first direction, which is the direction of change with time of the relative position of the power receiving coil holding part with respect to the power feeding coil holding part, and a plurality of power receiving coils are provided. The plurality of power receiving coils are arranged in the first direction. Further, in the present invention, the relative position of the power receiving coil holding part with respect to the power feeding coil holding part changes with time, and in one coil set, at least one power supply coil winding axis center and at least one When the axial center of the winding of the power receiving coil is separated in the first direction, the axial center of the winding of at least one power supply coil and the axial center of the winding of at least one power receiving coil are in the first direction. Approaching. For this reason, in the present invention, even if the relative position of the power receiving coil holding part with respect to the power feeding coil holding part changes with time, it is possible to suppress a reduction in the facing area between the power feeding coil and the power receiving coil in the coil set. . As a result, according to the present invention, it is possible to suppress a reduction in power transmission efficiency from the power feeding unit to the power receiving unit when the relative position of the power receiving coil with respect to the power feeding coil changes without performing complicated control. Become.

  In the present invention, the first direction is, for example, the vertical direction. Further, in the present invention, for example, the power receiving coil holding part is a joinery that can be opened and closed, the power supply coil holding part is a joinery frame in which the joinery is disposed, and the power-supplied body is attached to the joinery and the joinery. It is an electric lock that fixes the joinery so that it does not open against the frame. In this case, for example, even if the position of the joinery with respect to the joinery frame moves downward with time due to the influence of gravity acting on the joinery (specifically, on the side of the joinery frame on which the lock is engaged). Even if the position of the joinery with respect to the portion moves downward with time), it is possible to suppress a reduction in the transmission efficiency of power from the power feeding unit to the power receiving unit. Therefore, even if the position of the joinery with respect to the joinery frame moves downward with time, it is possible to supply electric power to the electric lock and operate the electric lock.

  As described above, the power feeding device of the present invention suppresses a decrease in power transmission efficiency from the power feeding unit to the power receiving unit when the relative position of the power receiving coil with respect to the power feeding coil changes without performing complicated control. It becomes possible to do.

It is a figure for demonstrating schematic structure of the electric power feeder concerning embodiment of this invention. It is a figure for demonstrating schematic structure of the electric power feeder concerning other embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Configuration of power supply device)
FIG. 1 is a diagram for explaining a schematic configuration of a power feeding device 1 according to an embodiment of the present invention. The power supply device 1 of this embodiment is a non-contact power supply device that supplies power to a power supply body by non-contact power transmission. The power feeding device 1 includes two coils, a coil set 4 composed of one power feeding coil 2 and one power receiving coil 3, and a coil set 7 composed of one power feeding coil 5 and one power receiving coil 6. Coil sets 4 and 7 are provided. That is, the power feeding device 1 includes two power feeding coils 2 and 5 and two power receiving coils 3 and 6. The power receiving coil 3 receives power transmitted from the power feeding coil 2, and the power receiving coil 6 receives power transmitted from the power feeding coil 5. In this embodiment, electric power is transmitted from the power feeding unit having the power feeding coils 2 and 5 to the power receiving unit having the power receiving coils 3 and 6 by the magnetic field coupling method.

  The power receiving coils 3 and 6 are attached to a door 10 of a building as a fitting. For example, the power receiving coils 3 and 6 are fixed to a coil holding member (not shown), and the coil holding member is fixed to the door 10. That is, the power receiving coils 3 and 6 are attached to the door 10 via the coil holding member. Alternatively, the power receiving coils 3 and 6 are directly attached to the door 10. The feeding coils 2 and 5 are attached to an outer frame 11 as a joinery frame in which the door 10 is disposed on the inner side. For example, the power feeding coils 2 and 5 are fixed to a coil holding member (not shown), and the coil holding member is fixed to the outer frame 11. That is, the power feeding coils 2 and 5 are attached to the outer frame 11 via the coil holding member. Alternatively, the feeding coils 2 and 5 are directly attached to the outer frame 11.

  The door 10 is attached to the outer frame 11 so that it can be opened and closed. The outer frame 11 of this embodiment is a power supply coil holding part that holds the two power supply coils 2 and 5, and the door 10 is a power reception coil holding part that holds the two power reception coils 3 and 6. In addition, the power supply apparatus 1 according to this embodiment supplies power to an electric lock (not shown) that fixes the door 10 so that the door 10 does not open with respect to the outer frame 11. That is, the power receiver of this embodiment is an electric lock. More specifically, the power receiver of this embodiment is a drive source such as a motor that drives an electric lock. This electric lock is attached to the door 10.

  As illustrated in FIG. 1, when the three directions orthogonal to each other are defined as an X direction, a Y direction, and a Z direction, the door 10 is disposed so that the height direction of the door 10 matches the Z direction. That is, the Z direction is the vertical direction (the direction of the vertical line). Further, in the state where the door 10 is closed, the thickness direction of the door 10 and the Y direction coincide with each other, and the width direction of the door 10 and the X direction coincide with each other. In the following description, the X direction is the left-right direction, the Y direction is the front-rear direction, and the Z direction is the up-down direction. The Z1 direction side is the “upper” side, and the Z2 direction side is the “lower” side.

  The feeding coils 2 and 5 and the receiving coils 3 and 6 are air core coils wound in an air core shape. The power feeding coils 2 and 5 and the power receiving coils 3 and 6 are wound in an annular shape and are formed in a flat and substantially cylindrical shape. The feeding coils 2 and 5 are connected to a power source via a switching element such as a field effect transistor or an oscillation circuit. The power receiving coils 3 and 6 are connected to an electric lock via a rectifier circuit or the like.

  The number of turns of the two power supply coils 2 and 5 (more specifically, the number of turns of the conductive wire constituting the power supply coils 2 and 5) is the same, and the number of turns of the two power reception coils 3 and 6 (more specifically, Specifically, the number of turns of the conductive wire constituting the power receiving coils 3 and 6 is also the same. Further, the number of turns of the feeding coils 2 and 5 and the number of turns of the power receiving coils 3 and 6 are the same. That is, in this embodiment, the number of turns of all the power feeding coils 2 and 5 and the number of turns of all the power receiving coils 3 and 6 are the same.

  The outer shapes of the two power supply coils 2 and 5 are substantially equal to each other, and the outer shapes of the two power receiving coils 3 and 6 are also approximately equal to each other. That is, the inner diameter, outer diameter, and thickness of the two power supply coils 2, 5 are substantially equal to each other, and the inner diameter, outer diameter, and thickness of the two power reception coils 3, 6 are also approximately equal to each other. Further, the outer shapes of the power feeding coils 2 and 5 and the outer shapes of the power receiving coils 3 and 6 are substantially equal. That is, in this embodiment, the outer shapes of all the feeding coils 2 and 5 and the outer shapes of all the receiving coils 3 and 6 are substantially equal.

  As described above, the power supply coils 2 and 5 are attached to the outer frame 11. The feeding coil 2 and the feeding coil 5 are arranged at the same position in the front-rear direction. Further, the feeding coil 2 and the feeding coil 5 are arranged at the same position in the left-right direction. The feeding coil 2 and the feeding coil 5 are arranged so as to overlap in the vertical direction with a predetermined interval in the vertical direction. That is, the two power supply coils 2 and 5 are arranged in the vertical direction. In this embodiment, the feeding coil 2 is disposed on the lower side, and the feeding coil 5 is disposed on the upper side.

  As described above, the power receiving coils 3 and 6 are attached to the door 10. In a state where the door 10 is closed, the power receiving coil 3 and the power receiving coil 6 are disposed at the same position in the front-rear direction and are disposed at the same position in the left-right direction. When the door 10 is closed, the power feeding coils 2 and 5 and the power receiving coils 3 and 6 are arranged at substantially the same position in the front-rear direction. The power receiving coil 3 and the power receiving coil 6 are arranged so as to overlap in the vertical direction with a predetermined interval in the vertical direction. That is, the two power receiving coils 3 and 6 are arranged in the vertical direction. In this embodiment, the power receiving coil 3 is disposed on the lower side, and the power receiving coil 6 is disposed on the upper side.

  The distance between the power receiving coil 3 and the power receiving coil 6 in the vertical direction is wider than the distance between the power feeding coil 2 and the power feeding coil 5 in the vertical direction. In this embodiment, when the door 10 is attached to the outer frame 11, as shown in FIG. 1A, the axis center CL1 of the power feeding coil 2 and the axis center CL2 of the power receiving coil 3 are vertically aligned. The door 10 is attached to the outer frame 11 so as to match. That is, with the door 10 closed, the door 10 is attached to the outer frame 11 so that the axis center CL1 and the axis center CL2 coincide.

  When the axial center CL1 and the axial center CL2 coincide with each other, the feeding coil 2 and the receiving coil 3 are opposed to each other with a predetermined gap in the left-right direction. At this time, the axis center CL3 of the winding of the feeding coil 5 and the axis center CL4 of the winding of the power receiving coil 6 are shifted in the vertical direction. That is, when the axial center CL1 of the coil assembly 4 and the winding axis 2 of the power receiving coil 3 coincides with the axial center CL2 of the power receiving coil 3, the axial center of the coil assembly 7 and the winding coil 5 is wound. CL3 and the axis center CL4 of the winding of the receiving coil 6 are displaced in the vertical direction. In this embodiment, when the axis center CL1 and the axis center CL2 coincide, the power transmission efficiency from the power feeding coil 2 to the power receiving coil 3 is the highest, and the axis center CL3 and the axis center CL4 are equal. When doing so, the transmission efficiency of power from the feeding coil 5 to the receiving coil 6 becomes the highest.

  Here, since gravity acts on the door 10, the relative position of the door 10 with respect to the outer frame 11 changes with time. Specifically, the door 10 with respect to the portion of the outer frame 11 on the side where the electric lock is engaged (the portion of the outer frame 11 on the side where the feeding coils 2 and 5 are attached) due to the influence of gravity acting on the door 10. The position of moves downward over time. That is, the relative position of the door 10 with respect to the outer frame 11 changes in a certain direction over time. In this embodiment, the vertical direction (vertical direction) is the first direction that is the direction of change with time of the relative position of the door 10 with respect to the outer frame 11.

  The maximum amount of change in the position of the door 10 relative to the portion of the outer frame 11 on which the electric lock is engaged after the door 10 is attached to the outer frame 11 is the left and right of the door 10 and the outer frame 11 in the closed state. Defined by the gap in the direction. In this embodiment, the vertical distance L between the shaft center CL3 and the shaft center CL4 when the door 10 is attached to the outer frame 11 so that the shaft center CL1 and the shaft center CL2 coincide in the vertical direction (FIG. 1). (See (A)) is substantially equal to the maximum change amount of the position of the door 10 with respect to the portion of the outer frame 11 on the side where the electric lock is engaged after the door 10 is attached to the outer frame 11. Therefore, in this embodiment, when the door 10 moves downward after the door 10 is attached to the outer frame 11, as shown in FIG. 1C, the axis center CL3 and the axis center CL4 coincide in the vertical direction. To do. At this time, when the door 10 is closed, the power feeding coil 5 and the power receiving coil 6 are opposed to each other with a predetermined gap in the left-right direction.

  In this embodiment, the outer diameter R (see FIG. 1A) of the power feeding coils 2 and 5 and the power receiving coils 3 and 6 is substantially equal to the distance L, and the axis center CL1 and the axis center CL2 are vertically moved. When they match in the direction, the upper end of the feeding coil 5 and the lower end of the power receiving coil 6 substantially match in the vertical direction. Therefore, in this embodiment, as shown in FIGS. 1A to 1C, even when the door 10 moves downward with respect to the outer frame 11, the feeding coil 2 and the receiving coil 3 face each other. The sum of the area and the facing area of the feeding coil 5 and the receiving coil 6 is substantially constant.

  In the power supply device 1 configured as described above, power is supplied to the electric lock with the door 10 closed. When supplying electric power to the electric lock, current is supplied to both of the two feeding coils 2 and 5. That is, in this embodiment, current is supplied to all the power feeding coils 2 and 5 when supplying power to the electric lock. In the present embodiment, the same current is simultaneously supplied to the two power supply coils 2 and 5. When a current flows through the power feeding coils 2 and 5, AC power is generated in the power receiving coils 3 and 6 disposed so as to face the power feeding coils 2 and 5. The AC power generated in the power receiving coils 3 and 6 is converted into DC power by the rectifier circuit and supplied to the electric lock.

(Main effects of this form)
As described above, in this embodiment, the two power supply coils 2, 5 and the two power reception coils 3, 6 are arranged in the vertical direction, and the axis center CL 1 of the winding of the power supply coil 2 and the power reception coil 3 are arranged. When the winding axis center CL2 of the power supply coil 5 coincides, the winding axis center CL3 of the feeding coil 5 and the winding axis center CL4 of the power receiving coil 6 are displaced in the vertical direction. Further, in this embodiment, as shown in FIG. 1, when the position of the door 10 with respect to the outer frame 11 moves downward with time and the vertical distance between the axial center CL1 and the axial center CL2 increases, The vertical distance between the axial center CL3 and the axial center CL4 approaches. Therefore, in this embodiment, even if the position of the door 10 with respect to the outer frame 11 moves downward with the influence of gravity acting on the door 10, the facing area between the feeding coil 2 and the receiving coil 3, and the feeding coil It is possible to suppress a decrease in the sum of the opposing areas of the power receiving coil 5 and the power receiving coil 6. As a result, in this embodiment, even when complicated control is not performed, a decrease in power transmission efficiency from the power feeding unit to the power receiving unit when the relative position of the power receiving coils 3 and 6 with respect to the power feeding coils 2 and 5 is suppressed is suppressed. It becomes possible to do. Therefore, in this embodiment, even if the position of the door 10 with respect to the outer frame 11 moves downward with time, it is possible to supply electric power to the electric lock and operate the electric lock without performing complicated control. become.

  In particular, in this embodiment, even if the door 10 moves downward with respect to the outer frame 11, the opposing area between the feeding coil 2 and the receiving coil 3 and the opposing area between the feeding coil 5 and the receiving coil 6 are as follows. The sum of is almost constant. In this embodiment, the same current is simultaneously supplied to the two power supply coils 2 and 5 when power is supplied to the electric lock. For this reason, in this embodiment, it is possible to suppress variation in the transmission efficiency of power from the power feeding unit to the power receiving unit when the relative positions of the power receiving coils 3 and 6 with respect to the power feeding coils 2 and 5 change.

  Further, in this embodiment, even if the door 10 moves downward with respect to the outer frame 11, the facing area between the feeding coil 2 and the receiving coil 3 and the facing area between the feeding coil 5 and the receiving coil 6 are increased. Therefore, when the door 10 is attached to the outer frame 11, the allowable range of the attachment position of the door 10 with respect to the outer frame 11 can be expanded.

(Modification of power feeding device)
FIG. 2 is a diagram for explaining a schematic configuration of a power feeding device 1 according to another embodiment of the present invention.

  In the embodiment described above, the power feeding device 1 includes a coil set 4 including one power supply coil 2 and one power receiving coil 3, and a coil set 7 including one power supply coil 5 and one power receiving coil 6. And two coil sets. In addition to this, for example, as shown in FIG. 2, the power feeding device 1 is replaced with the coil sets 4 and 7, or in addition to the coil sets 4 and 7, one power feeding coil 2 and two power receiving devices. A coil set 14 including the coils 3 and 6 may be provided.

  Even in this case, the door 10 is attached to the outer frame 11 so that the axial center CL1 and the axial center CL2 coincide with each other in the vertical direction, as in the above-described embodiment (see FIG. 2A). In this case, the distance L1 (see FIG. 2A) between the upper end of the power receiving coil 3 and the lower end of the power receiving coil 6 is, for example, half of the outer diameter R of the power feeding coil 2 and the power receiving coils 3 and 6. It has become. Therefore, when the door 10 moves downward with respect to the outer frame 11 and the upper end of the receiving coil 3 reaches the axial center CL1 in the vertical direction as shown in FIG. 2B, the receiving coil 6 Reaches the upper end of the feeding coil 2. That is, when the door 10 moves downward with respect to the outer frame 11, the power feeding coil 2 and the power receiving coil 6 begin to face each other before the power feeding coil 2 and the power receiving coil 3 do not face each other. In this case, the vertical distance L2 between the shaft center CL2 and the shaft center CL4 is relative to the portion of the outer frame 11 on which the electric lock is engaged after the door 10 is attached to the outer frame 11. It is almost equal to the maximum change amount of the position of the door 10.

  In the power feeding device 1 shown in FIG. 2, when the position of the door 10 with respect to the outer frame 11 moves downward with time due to the gravitational force acting on the door 10, the power is fed to the axis center CL <b> 2 of the winding of the power receiving coil 3. Even if the distance in the vertical direction from the axis center CL1 of the winding of the coil 2 is increased, the distance in the vertical direction between the axis center CL4 of the winding of the power receiving coil 6 and the axis center CL1 becomes closer. Therefore, also in this electric power feeder 1, when the position of the door 10 with respect to the outer frame 11 moves downward with time, it is possible to suppress a decrease in the facing area between the power feeding coil 2 and the power receiving coils 3 and 6. become. As a result, it is possible to suppress a reduction in power transmission efficiency from the power feeding unit to the power receiving unit when the relative position of the power receiving coils 3 and 6 with respect to the power feeding coil 2 is changed without performing complicated control. .

  The distance L1 may be shorter than half of the outer diameter R. Further, when the door 10 moves downward with respect to the outer frame 11, the feeding coil 2 and the receiving coil 6 begin to face each other before the feeding coil 2 and the receiving coil 3 do not face each other. If present, the distance L1 may be longer than half of the outer diameter R. Further, the power feeding device 1 illustrated in FIG. 2 may include two or more coil sets 14.

  In the power feeding device 1 shown in FIG. 2, the coil set 14 may include three or more power receiving coils arranged in the vertical direction. In the power feeding device 1 shown in FIG. 2, the coil set 14 may include two or more power feeding coils arranged in the vertical direction. In this case, the coil set 14 includes a larger number of power receiving coils than the number of power feeding coils. In this case, the position of the door 10 with respect to the outer frame 11 moves downward with time, and in the coil set 14, at least one power supply coil and the center of the winding axis of at least one power supply coil are provided. As the center of winding of the coil moves away in the vertical direction, the center of the winding of at least one power supply coil and the axis of the winding of at least one power receiving coil approach in the vertical direction.

  2 includes a coil set 14 including one power supply coil 2 and two power reception coils 3 and 6. The power supply apparatus 1 includes two power supply coils 2. 5 and one receiving coil 6 may be provided. In this case, for example, the door 10 is attached to the outer frame 11 so that the axial center CL3 and the axial center CL4 coincide in the vertical direction. In this case, when the position of the door 10 with respect to the outer frame 11 moves downward with time, the vertical direction between the axis center CL4 of the winding of the power receiving coil 6 and the axis center CL3 of the winding of the power feeding coil 5 is increased. Since the vertical distance between the axis center CL4 of the winding of the power receiving coil 6 and the axis center CL1 of the winding of the power feeding coil 2 approaches, the position of the door 10 with respect to the outer frame 11 changes over time. Therefore, it is possible to suppress a decrease in the facing area between the feeding coils 2 and 5 and the receiving coil 6 when moving downward. As a result, it is possible to suppress a decrease in power transmission efficiency from the power feeding unit to the power receiving unit when the relative position of the power receiving coil 6 with respect to the power feeding coils 2 and 5 is changed without performing complicated control. .

  Note that the coil set in this case may include three or more feeding coils arranged in the vertical direction. In this case, the coil set may include two or more power receiving coils arranged in the vertical direction. When the coil set includes two or more power receiving coils, the coil set includes a larger number of power feeding coils than the number of power receiving coils. In this case, two or more coil sets including two power supply coils 2 and 5 and one power reception coil 6 may be provided.

(Other embodiments)
The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited to this, and various modifications can be made without departing from the scope of the present invention.

  In the embodiment described above, the distance between the power receiving coil 3 and the power receiving coil 6 in the vertical direction is larger than the distance between the power feeding coil 2 and the power feeding coil 5 in the vertical direction. In addition, for example, the distance between the feeding coil 2 and the feeding coil 5 in the vertical direction may be wider than the distance between the receiving coil 3 and the receiving coil 6 in the vertical direction. Moreover, although the electric power feeder 1 is provided with the two coil sets 4 and 7 in the form mentioned above, the electric power feeder 1 may be provided with the three or more coil sets. In this case, the position of the door 10 with respect to the outer frame 11 moves downward with time, and at least one of the three or more coil sets has an axis center of winding of the feeding coil. When the axis of winding of the power receiving coil moves away in the vertical direction, the axis of winding of the power feeding coil and the axis of the winding of the power receiving coil of the at least one coil set approach each other in the vertical direction. Go.

  In the embodiment described above, the distance L is substantially equal to the maximum change amount of the position of the door 10 with respect to the portion of the outer frame 11 on the side where the electric lock is engaged after the door 10 is attached to the outer frame 11. . In addition, for example, the distance L may be shorter than the maximum change amount. In addition, the distance L may be longer than the maximum change amount as long as the feeding coil 5 and the receiving coil 6 start to face each other before the feeding coil 2 and the receiving coil 3 do not face each other. In the embodiment described above, the outer diameter R of the power feeding coils 2 and 5 and the power receiving coils 3 and 6 is substantially equal to the distance L, but the outer diameter R may be larger than the distance L. Further, the outer diameter R may be smaller than the distance L as long as the feeding coil 5 and the receiving coil 6 start to face each other before the feeding coil 2 and the receiving coil 3 do not face each other.

  In the embodiment described above, the rectifier circuit connected to the power receiving coil 3 and the electric lock may be connected in series with the rectifier circuit connected to the power receiving coil 6 and the electric lock. In this case, it is possible to suppress a change in voltage applied to the electric lock. Further, in the above-described embodiment, the state where the power receiving coil 3 and the power receiving coil 6 are electrically connected to the electric lock based on the voltage generated at both ends of the power receiving coil 3 and the voltage generated at both ends of the power receiving coil 6, and the power receiving coil The electrical connection state between the power receiving coils 3 and 6 and the electric lock is switched between a state in which only 3 is electrically connected to the electric lock and a state in which only the power receiving coil 6 is electrically connected to the electric lock. May be.

  In the embodiment described above, the same current is supplied to the two power supply coils 2 and 5 when power is supplied to the electric lock. However, when power is supplied to the electric lock, the two power supply coils 2 and 5 are supplied. Each of these may be supplied with a different current. In the above-described embodiment, the number of turns of the two power supply coils 2 and 5 and the number of turns of the two power reception coils 3 and 6 are the same, but the number of turns of the two power supply coils 2 and 5 is different. The number of turns of the two power receiving coils 3 and 6 may be different. Further, the number of turns of the feeding coil 2 and the number of turns of the receiving coil 3 may be different, and the number of turns of the feeding coil 5 and the number of turns of the receiving coil 6 may be different.

  In the embodiment described above, the outer shapes of the two power feeding coils 2 and 5 are substantially equal to each other, and the outer shapes of the two power receiving coils 3 and 6 are approximately equal to each other. The outer shapes of the two power receiving coils 3 and 6 may be different. Further, the outer shape of the feeding coil 2 and the outer shape of the receiving coil 3 may be different, and the outer shape of the feeding coil 5 and the outer shape of the receiving coil 6 may be different.

  In the embodiment described above, the feeding coils 2 and 5 and the receiving coils 3 and 6 are wound in an annular shape. In addition, for example, the power feeding coils 2 and 5 and the power receiving coils 3 and 6 may be wound around a polygonal ring such as a square ring or an elliptical ring. In the above-described embodiment, power is transmitted from the power feeding unit to the power receiving unit by the magnetic field coupling method. However, power may be transmitted from the power feeding unit to the power receiving unit by another method such as an electromagnetic induction method. Further, in the above-described form, when the axial center CL1 of the winding of the feeding coil 2 coincides with the axial center CL2 of the winding of the power receiving coil 3, the power transmission efficiency from the power feeding coil 2 to the power receiving coil 3 is achieved. The power transmission efficiency from the feeding coil 5 to the receiving coil 6 is the highest when the axial center CL3 of the winding of the feeding coil 5 and the axial center CL4 of the winding of the receiving coil 6 coincide with each other. Although it is high, when the power transmission efficiency from the feeding coil 2 to the receiving coil 3 becomes the highest, the axis center CL1 and the axis center CL2 do not have to coincide with each other, and the feeding coil 5 to the receiving coil When the transmission efficiency of power to 6 is highest, the axis center CL3 and the axis center CL4 do not have to coincide with each other.

  In the form mentioned above, although the receiving coils 3 and 6 are attached to the door 10, the receiving coils 3 and 6 may be attached to fittings other than the door 10. FIG. For example, the power receiving coils 3 and 6 may be attached to a sliding door such as a window or a shutter. In this case, the feeding coils 2 and 5 are attached to a joinery frame such as a window frame. Further, in this case, the direction of change with time of the relative position of the sliding door with respect to the joinery frame is, for example, the thickness direction of the sliding door (that is, the horizontal direction). Moreover, the power feeding coils 2 and 5 and the power receiving coils 3 and 6 may be attached to a structure or equipment other than the joinery and the joinery frame. In the above-described embodiment, the power-supplied body to which power is supplied by the power supply apparatus 1 is an electric lock. However, the power-supplied body to which power is supplied by the power supply apparatus 1 may be a device other than the electric lock. It can be a storage battery.

DESCRIPTION OF SYMBOLS 1 Feeding device 2, 5 Feeding coil 3, 6 Power receiving coil 4, 7, 14 Coil set 10 Door (power receiving coil holding part, fitting)
11 Outer frame (feed coil holding part, joinery frame)
CL1, CL3 Center axis of winding of feeding coil CL2, CL4 Center axis of winding of receiving coil Z Vertical direction (vertical direction, first direction)

Claims (6)

In a power feeding device that supplies power to a power-supplied body by non-contact power transmission,
A plurality of coil sets including one power supply coil wound in a ring and one power receiving coil wound in a ring;
The plurality of power supply coils are held in a power supply coil holding unit,
The plurality of power receiving coils are held by a power receiving coil holding portion whose relative position with respect to the power feeding coil holding portion changes in a certain direction over time,
Assuming that the direction of change with time of the relative position of the power receiving coil holding part with respect to the power feeding coil holding part is a first direction, the plurality of power feeding coils are arranged in the first direction, and the plurality of power receiving coils are: Arranged in the first direction,
When at least one of the plurality of coil sets has a winding axis center of the power supply coil and a winding axis center of the power receiving coil coincide with each other, at least one of the coil sets The center of winding of the feeding coil and the center of winding of the receiving coil of the coil set are shifted in the first direction,
The relative position of the power receiving coil holding part with respect to the power feeding coil holding part changes over time, and at least one of the plurality of coil sets, the axial center of the winding of the power feeding coil and the When the axial center of the winding of the power receiving coil moves away in the first direction, the axial center of the winding of the feeding coil and the axial center of the winding of the receiving coil of at least one of the coil sets A power feeding device that approaches in the first direction.   Even if the relative position of the power receiving coil holding part with respect to the power feeding coil holding part changes relatively in the first direction, the sum of the opposing areas of the power feeding coil and the power receiving coil of each of the plurality of coil sets is The power feeding device according to claim 1, wherein the power feeding device is substantially constant. In a power feeding device that supplies power to a power-supplied body by non-contact power transmission,
One or more coil sets each including one or more power supply coils wound in a ring and a number of power reception coils wound in a ring and larger in number than the number of the power supply coils;
One or more of the feeding coils are held in a feeding coil holding unit,
The plurality of power receiving coils are held by a power receiving coil holding portion whose relative position with respect to the power feeding coil holding portion changes in a certain direction over time,
When the direction of change with time of the relative position of the power receiving coil holding part with respect to the power feeding coil holding part is a first direction, when a plurality of the power feeding coils are provided, a plurality of the power feeding coils are Arranged in a first direction, the plurality of power receiving coils are arranged in the first direction,
The relative position of the power receiving coil holding part with respect to the power feeding coil holding part changes with time, so that in one coil set, at least one power supply coil winding axis center and at least one power receiving coil. When the axial center of coil winding moves away in the first direction, the axial center of winding of at least one power supply coil and the axial center of winding of at least one power receiving coil are A power supply device that approaches in one direction. In a power feeding device that supplies power to a power-supplied body by non-contact power transmission,
Including one or more coil sets including one or more power receiving coils wound in a ring and a larger number of power feeding coils than the number of the power receiving coils wound in a ring;
The plurality of power supply coils are held in a power supply coil holding unit,
One or more of the power receiving coils are held by a power receiving coil holding part whose relative position with respect to the power feeding coil holding part changes in a certain direction with time,
When the direction of change with time of the relative position of the power receiving coil holding part with respect to the power feeding coil holding part is a first direction, when a plurality of the power receiving coils are provided, a plurality of the power receiving coils are Arranged in a first direction, the plurality of feeding coils are arranged in the first direction,
The relative position of the power receiving coil holding part with respect to the power feeding coil holding part changes with time, so that in one coil set, at least one power supply coil winding axis center and at least one power receiving coil. When the axial center of coil winding moves away in the first direction, the axial center of winding of at least one power supply coil and the axial center of winding of at least one power receiving coil are A power supply device that approaches in one direction.   The power feeding apparatus according to claim 1, wherein the first direction is a vertical direction. The power receiving coil holding part is a fitting that can be opened and closed,
The feeding coil holding part is a joinery frame in which the joinery is arranged on the inside,
The power feeding device according to claim 5, wherein the power-supplied body is an electric lock that is attached to the joinery and fixes the joinery so that the joinery does not open with respect to the joinery frame.

Images