Non-contact power supply system, power reception device, and linear transport system

Abstract

To provide a non-contact power supply system, a power reception device for the non-contact power supply system, and a linear transport system in which the radiation performance of a heating component on the power reception side is outstanding, with a simple configuration in an overall view of the power transmission and reception sides.SOLUTION: A non-contact power supply system has: a power transmission element; a power reception element which receives electric power from the power transmission element in a non-contact manner in an isolated and opposing position from the power transmission element; a power conversion unit which converts the electric power received by the power reception element and supplies it to an electric load provided in a mobile object moving relative to the power transmission element; and a fixture 12 which is formed in a cylindrical shape having a cavity 1201 thereinside, in which the power reception element is fitted on a cylindrical outer circumference so as to transmit heat of the power reception element, and the power conversion unit is fitted into the cavity 1201 so as to transmit heat of the power conversion unit, and which is installed at the mobile object while having a region where the cavity 1201 penetrates in a moving direction of the mobile object even if the power conversion unit is fitted.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to a contactless power supply system, a power receiving device, and a linear transport system. [Background technology]

[0002] Linear transport systems using linear motors are mainly installed in industrial production lines, and for example, transport a workpiece at the front end of the production line to the rear end after it is attracted or fixed to a movable stage. An electric load is mounted on the movable stage to attract or fix the workpiece. Traditionally, cables have been used to supply power to the electric load on the movable stage, but in recent years, the use of non-contact power supply systems has been proposed to eliminate the risk of cable breakage.

[0003] A contactless power transfer system has a power transmission device and a power receiving device, and transmits power from the power transmission device to the power receiving device without physical contact. Contactless power transfer systems are used in a wide range of fields, such as electric vehicles, electric railways, and industrial conveyors. The power receiving device is equipped with a power receiving element and a power conversion device, and the power receiving element receives power from the power transmission device, and the power conversion device converts the power received by the power receiving element into DC power. When a power receiving device is attached to a mobile body and DC power is supplied to an electrical load installed on the mobile body, the power receiving element and the power conversion device are heat-generating components, so heat dissipation becomes an issue.

[0004] For example, in order to dissipate heat from heat-generating components in the movable part of a linear transport system using a non-contact power supply system, the heat from the heat-generating components in the movable part is transferred to the fixed part, which is the power transmission side, for cooling in Patent Document 1. Specifically, a coolant supply device, an air duct, and the like are provided on the fixed part side. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] International Publication No. 2014 / 045375 Summary of the Invention [Problem to be solved by the invention]

[0006] However, when cooling by conducting heat from a heat-generating component on the movable part to a fixed part on the power transmission side as in Patent Document 1, it is necessary to install a refrigerant supply device, air duct, etc. in the area of ​​the fixed part that corresponds to the range of motion of the movable part, which makes the configuration of the entire contactless power transfer system including the power transmission device and power receiving device complex.

[0007] The present disclosure has been made in consideration of the above-mentioned problems, and aims to provide a non-contact power supply system, power receiving device, and linear conveying system that have a simple configuration overall on the power transmitting side and power receiving side, and have high heat dissipation performance for heat-generating components on the power receiving side. [Means for solving the problem]

[0008] The contactless power supply system disclosed herein comprises a transmitting element, a receiving element which receives power contactlessly from the transmitting element at a position isolated and facing the transmitting element, a power conversion unit which converts the power received by the receiving element and supplies it to an electrical load provided on a mobile body that moves relative to the transmitting element, and a mounting jig which is cylindrical with a hollow portion on the inside, has the receiving element attached to the outer periphery of the cylindrical shape so that heat from the receiving element is conducted, and the power conversion unit is attached within the hollow portion so that heat from the power conversion unit is conducted, and is installed on the mobile body so that the hollow portion has an area which penetrates in the direction of movement of the mobile body even when the power conversion unit is attached.

[0009] The power receiving device disclosed here comprises a receiving element that receives power non-contact from the transmitting element at a position isolated and facing the transmitting element, a power conversion unit that converts the power received by the receiving element and supplies it to an electrical load provided on a mobile body that moves relative to the transmitting element, and a mounting jig that is cylindrical with a hollow portion on the inside, has the receiving element attached to the outer periphery of the cylindrical shape so as to conduct heat from the receiving element, and the power conversion unit attached within the hollow portion so as to conduct heat from the power conversion unit, and is installed on the mobile body so that the hollow portion has an area that penetrates in the direction of movement of the mobile body even when the power conversion unit is attached.

[0010] The linear conveying system according to this disclosure comprises a power transmitting element provided on a fixed part, a movable part that moves relative to the fixed part, a power receiving element that receives power non-contact from the power transmitting element at a position isolated and facing the power transmitting element, a power conversion unit that converts the power received by the power receiving element and supplies it to an electrical load provided on the movable part, and a mounting jig that is cylindrical in shape with a hollow part on the inside, the power receiving element is attached to the outer periphery of the cylindrical shape so that heat from the power receiving element is conducted, and the power conversion unit is attached within the hollow part so that heat from the power conversion unit is conducted, and is installed on the movable part so that the hollow part has an area that penetrates in the direction of movement of the movable part even when the power conversion unit is attached. Effect of the Invention

[0011] According to the present disclosure, it is possible to improve the heat dissipation performance of a heat-generating component on the power receiving side with a simple configuration when viewed as an entire contactless power supply system including the power transmitting side and the power receiving side. [Brief description of the drawings]

[0012] [Figure 1] 1 is a schematic diagram of a circuit block of a contactless power supply system according to a first embodiment. [Diagram 2] 2 is a diagram showing a positional relationship between a mover and a power transmission side circuit of a linear transport system to which the non-contact power supply system according to the first embodiment is applied. FIG. [Diagram 3] 2 is a diagram of a power receiving device, a mover, an upper capture part, and a lower capture part of the contactless power supply system according to the first embodiment before assembly. FIG. [Figure 4] 3 is a diagram showing how to assemble a power receiving device, a mover, an upper capture part, and a lower capture part of the contactless power supply system according to the first embodiment. FIG. [Diagram 5] 2 is a diagram of a power receiving device, a mover, an upper capture part, and a lower capture part of the contactless power supply system according to the first embodiment, as viewed from the Y-axis direction. FIG. [Figure 6] 2 is a schematic diagram of a power receiving device, a mover, an upper capture part, and a lower capture part of the contactless power supply system according to the first embodiment during traveling. FIG. [Figure 7]FIG. 11 is a diagram of a power receiving device, a mover, an upper capture part, and a lower capture part of a contactless power supply system according to a second embodiment before assembly. [Figure 8] 13 is a diagram showing how to assemble a power receiving device, a mover, an upper capture part, and a lower capture part of a contactless power supply system according to a second embodiment. FIG. [Figure 9] 13 is a diagram showing a power receiving device, a mover, an upper capture part, and a lower capture part of a contactless power supply system according to a second embodiment as viewed from the Y-axis direction. FIG. [Figure 10] 13 is a schematic diagram of a power receiving device, a mover, an upper capture part, and a lower capture part of a contactless power supply system according to a second embodiment during traveling. FIG. [Figure 11] 13 is a diagram showing a power receiving device, a mover, an upper capture part, and a lower capture part of a contactless power supply system according to a third embodiment as viewed from the Y-axis direction. FIG. [Figure 12] 13 is a schematic diagram of a power receiving device, a mover, an upper capture part, and a lower capture part of a contactless power supply system according to a third embodiment during traveling. FIG. [Figure 13] 13 is a schematic diagram of a power receiving device, a mover, an upper capture part, and a lower capture part of a contactless power supply system according to a fourth embodiment during traveling. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In the drawings, the same reference numerals denote the same or corresponding parts.

[0014] Embodiment 1 FIG. 1 is a schematic diagram of a circuit block of a contactless power transfer system 1 according to a first embodiment. The contactless power transfer system 1 includes a power transmitting circuit 2 and a power receiving circuit 3. The power transmitting circuit 2 is a power transmitting device. The power transmitting circuit 2 includes a power source 201 and a power transmitting coil 202, and the power source 201 applies power to the power transmitting coil 202. The power receiving circuit 3 includes a power receiving coil 301 and a power conversion device 302. The power receiving coil 301 receives AC power from the power transmitting coil 202. The power conversion device 302 shapes the AC power received by the power receiving coil 301 and supplies it to an electric load 4.

[0015] The transmitting coil 202 is a transmitting element. The receiving coil 301 is a receiving element. The receiving coil 301 is located opposite and isolated from the transmitting coil 202, and receives electric power from the transmitting coil 202 in a non-contact manner.

[0016] Here, the power supply method will be described as being a magnetic field coupling method, but is not limited to this. For example, an electric field coupling method may be used. In the case of the electric field coupling method, capacitors are used as the power transmitting element and the power receiving element instead of coils.

[0017] 2 is a diagram showing a positional relationship between the mover 7 and the power transmitting circuit 2 of the linear transport system 5 to which the contactless power supply system 1 according to the first embodiment is applied. The stator 6 has a support portion 601 and a protrusion portion 602. The stator 6 is fixed to a fixed base 9. The fixed base 9 and the stator 6 are fixed portions.

[0018] The support part 601 is fixed to the fixed base 9 and extends vertically from the fixed base 9. The direction in which the support part 601 extends from the fixed base 9 is the Z axis, the direction in which the mover 7 moves is the Y axis, and the direction perpendicular to the Z axis and the Y axis is the X axis. The stator 6 extends in the direction in which the mover 7 moves. The protrusion part 602 extends from a side surface (surface parallel to the Z axis) of the support part 601 above the support part 601 (the positive side in the Z axis direction) in a direction horizontal to the fixed base 9 (XY plane).

[0019] The mover 7 is installed on the protrusion 602 via wheels 8. The mover 7 is made up of an upper block 701, a middle block 702, and a lower block 703. The upper block 701, which is on the + side of the protrusion 602 in the Z axis direction, and the lower block 703, which is on the - side of the protrusion 602, sandwich the protrusion 602 via wheels 8. The middle block 702 connects the upper block 701 and the lower block 703. The upper block 701 and the lower block 703 are plate-shaped extending in the XY plane.

[0020] The lower block 703 has a cutout 10 on the surface facing the fixed base 9, and a power receiving circuit 3 (not shown) is installed in the cutout 10 via a mounting jig 12 (not shown). The power transmitting circuit 2 is installed on the fixed base 9 at a position facing the power receiving circuit 3. That is, it is sufficient that the protrusion 602 is provided on the support part 601 so that the power receiving circuit 3 and the power transmitting circuit 2 are at a distance that allows power transmission and reception.

[0021] Although not shown, an armature is provided at a position facing the middle block 702 of the stator 6. A magnet is provided at a position facing the armature of the middle block 702. A thrust force is generated by the armature and the magnet, causing the mover 7 to move. The mover 7 is a moving body. The mover 7 moves relative to the power transmitting side circuit 2. That is, the mover 7 moves relative to the power transmitting coil 202.

[0022] The positional relationship and shape of the mover 7 and the stator 6 are not limited to this. The positions of the power receiving circuit 3 and the power transmitting circuit 2 relative to the mover 7 and the stator 6 are also not limited to this, as long as the power receiving circuit 3 and the power transmitting circuit 2 are positioned facing each other and separated by a distance that allows power transmission and reception, and the power receiving circuit 3 is provided on the mover 7, and the power transmitting circuit 2 is fixed together with the stator 6.

[0023] For the sake of the following explanation, the attachment jig 12 (described in detail later), the power converter 302 and the power receiving coil 301 which move together with the mover 7 will be referred to as a power receiving device 30 of the contactless power supply system 1.

[0024] Fig. 3 is a diagram of the power receiving device 30, the mover 7, the upper capture part 1101, and the lower capture part 1103 of the contactless power supply system 1 according to the first embodiment before assembly, and Fig. 4 is a diagram showing the state of assembling the power receiving device 30, the mover 7, the upper capture part 1101, and the lower capture part 1103 of the contactless power supply system 1 according to the first embodiment. Both the upper capture part 1101 and the lower capture part 1103 are capture parts. Description will be made with reference to Figs. 3 and 4.

[0025] A cutout 10 is provided on the surface of the lower block 703 of the mover 7 facing the fixed base 9. The mover 7 has the cutout 10 into which the mounting jig 12 fits on the surface on which the mounting jig 12 is provided. The length of the cutout 10 in the X-axis direction is the same as the length of the mounting jig 12 in the X-axis direction, and the shape of the lower block 703 viewed from the Y-axis direction is a U-shape opening on the fixed base 9 side. The mounting jig 12 described below fits into the cutout 10.

[0026] The shape of the notch 10 is not limited to this. Any shape may be used as long as it allows the mounting jig 12 to be fixed. If the notch 10 is provided, the shape of the mounting jig 12 can be simplified, and the ease of mounting and the fixing strength can be increased.

[0027] In addition, in order to increase the fixing strength between the cutout portion 10 and the mounting jig 12, for example, a claw portion (not shown) for hooking and fixing the mounting jig 12 at any position within the cutout portion 10 may be provided.

[0028] Upper capture parts 1101 are provided on both ends in the Y-axis direction of the lower block 703. The upper capture parts 1101 are formed from a thin, lightweight plate material, and when viewed from the Y-axis direction, have a U-shape with an opening 1102 on the fixed base 9 side.

[0029] The length in the Z-axis direction of the upper capturing part 1101 is the same as the thickness (length in the Z-axis direction) of the lower block 703, and the length in the X-axis direction of the opening 1102 as viewed from the Y-axis direction is the same as the length in the X-axis direction of the notch 10. The upper capturing part 1101 is fixed to the lower block 703 so that the notch 10 is included in the opening 1102 as viewed from the Y-axis direction. That is, the upper capturing part 1101 is fixed to the mover 7 in the movement direction.

[0030] The length of the upper capturing portion 1101 in the Y-axis direction is determined within a range in which there is no contact with another adjacent movable element (not shown) and in which the driving performance of the movable element 7 is not significantly affected.

[0031] The mounting jig 12 is made of a single thin plate material, has a hollow portion 1201 penetrating in the Y-axis direction on the inside, and is square-shaped (a rectangular cylindrical shape with a square cross section) when viewed from the Y-axis direction. The mounting jig upper surface 1202 and a pair of mounting jig side surfaces 1204 are a single member. Of the four surfaces constituting the square cylindrical shape, the surface perpendicular to the Z-axis that is fitted into the lower block 703 is the mounting jig upper surface 1202, and the surface perpendicular to the Z-axis that faces the mounting jig upper surface 1202 is the mounting jig lower surface 1203. The mounting jig upper surface 1202 is one of the surfaces constituting the square tube, and is a surface different from the surface to which the power receiving coil 301 described later is attached. Of the four surfaces constituting the square cylindrical shape, the two surfaces parallel to the Z-axis are the mounting jig side surfaces 1204.

[0032] The length of mounting jig 12 in the X-axis direction is equal to the length of cutout portion 10 in the X-axis direction, and mounting jig 12 is fitted into cutout portion 10. Mounting jig 12 may be fixed to lower block 703 using bolts or the like. The length of mounting jig 12 in the Y-axis direction is shorter than the length of cutout portion 10 in the Y-axis direction. The length of mounting jig 12 in the Z-axis direction is longer than the length of cutout portion 10 in the Z-axis direction. Mounting jig 12 is made of a non-magnetic metal with high thermal conductivity, such as copper or aluminum.

[0033] The power converter 302 is provided in a cavity 1201 of the mounting jig 12 and fixed to a lower surface 1203 of the mounting jig. The length of the power converter 302 in the Z-axis direction is shorter than the length of the cavity 1201 in the Z-axis direction. Even when the power converter 302 is provided in the cavity 1201, the cavity 1201 has a region penetrating in the Y-axis direction. The lengths of the power converter 302 in the Y-axis direction and the X-axis direction are equal to the lengths of the cavity 1201 in the Y-axis direction and the X-axis direction, respectively.

[0034] The power converter 302 is equipped with a switching element 303 and generates heat. The surface of the power converter 302 that is fixed to the mounting jig lower surface 1203 (the lower surface of the power converter 302) is made of a non-magnetic metal with high thermal conductivity, similar to the mounting jig 12. The heat of the power converter 302 is conducted to the mounting jig 12.

[0035] A heat dissipation promoting sheet material or the like may be added between power converter 302 and lower surface 1203 of mounting jig in order to fill the gap formed during joining and reduce thermal resistance.

[0036] The power converter 302 is a power converter. The power converter 302 generates converted power, which is power obtained by converting AC power received by the power receiving coil 301 into DC power, and supplies the converted power to an electric load 4 (not shown) provided on the mover 7. The converted power may be any power obtained by converting the AC power received from the power receiving coil 301 according to the load, and is not limited to DC power. The power converter 302 converts the power received by the power receiving coil 301 and supplies the converted power to an electric load provided on the mover 7 that moves relative to the power transmitting coil 202.

[0037] The power receiving coil 301 is fixed to the side of the fixed base 9 (not shown) of the mounting jig lower surface 1203. In other words, the surface of the mounting jig 12 on which the power conversion device 302 is provided is the reverse side of the outer circumferential surface of the mounting jig 12 on which the power receiving coil 301 is attached. Although the position of the power conversion device 302 is not limited to this, this allows the wiring between the power receiving coil 301 and the power conversion device 302 to be minimized.

[0038] The lengths of the power receiving coil 301 in the Y-axis direction and the X-axis direction are equal to the lengths of the mounting jig 12 in the Y-axis direction and the X-axis direction, respectively. Like the power conversion device 302, the power receiving coil 301 also generates heat. The surface of the power receiving coil 301 that is fixed to the lower surface 1203 of the mounting jig (the upper surface of the power receiving coil 301) is made of a non-magnetic metal with high thermal conductivity, like the mounting jig 12. The heat of the power receiving coil 301 is conducted to the mounting jig 12.

[0039] A heat dissipation promoting sheet material or the like may be added between the power receiving coil 301 and the lower surface 1203 of the mounting jig in order to fill the gap formed when they are joined together and reduce the thermal resistance.

[0040] In other words, the mounting jig 12 has the receiving coil 301 attached to the outer periphery of the L-shape so that the heat of the receiving coil 301 is conducted, and the power conversion device 302 is attached within the hollow portion 1201 so that the heat of the power conversion device 302 is conducted, and even when the power conversion device 302 is attached, the hollow portion 1201 has an area that penetrates in the direction of movement of the mover 7 and is installed on the mover 7.

[0041] The lower capture part 1103 is fixed to the mounting jig 12 or the power receiving coil 301 so as to sandwich the power receiving coil 301 and the mounting jig 12 from both ends in the Y-axis direction. The lower capture part 1103 is made of a thin plate and a lightweight non-metallic material. When viewed from the Y-axis direction, the lower capture part 1103 has a U-shape with an opening 1102 on the Z-axis + side (upper side). The lengths of the lower capture part 1103 in the X-axis and Y-axis directions are equal to the lengths of the upper capture part 1101 in the X-axis and Y-axis directions. The lower capture part 1103 is fixed to the power receiving coil 301 or the mounting jig 12 from the movement direction.

[0042] The lower capturing portion 1103 is made of a non-metallic material so as not to interfere with power supply due to magnetic interference with the power receiving coil 301 .

[0043] The lower capture part 1103 does not have to be U-shaped when viewed from the Y-axis direction depending on the shapes of the power receiving coil 301 and the mounting jig 12. The lower capture part 1103 may have any shape as long as it has the same shape as the outer periphery of the mounting jig 12 and the power receiving coil 301 when viewed from the movement direction of the mover 7, and has an opening 1102 on the side opposite the power transmitting coil 202 side.

[0044] After assembly, the upper capturing part 1101 and the lower capturing part 1103 form a square shape when viewed from the Y-axis direction. The lower capturing part 1103 and the upper capturing part 1101 may be integrated.

[0045] 5 is a view of the power receiving device 30, the mover 7, the upper capture part 1101, and the lower capture part 1103 of the contactless power supply system 1 according to the first embodiment as viewed from the Y-axis direction. The hollow part 1201 and the opening part 1102 of the mounting jig 12 have a region penetrating in the Y-axis direction, and this region is referred to as region 52. Region 52 is a region through which the hollow part 1201 penetrates in the moving direction of the mover 7 even when the power conversion device 302 is attached. Regions 51 and 53 will be described later, but regions 51 and 53 do not penetrate in the Y-axis direction.

[0046] Fig. 6 is a schematic diagram of the power receiving device 30, the mover 7, the upper trapping portion 1101, and the lower trapping portion 1103 of the contactless power supply system 1 according to the first embodiment when they are moving. The moving direction of the mover 7 is the negative side of the Y axis (the left side of the paper in Fig. 6). When the mover 7 moves, a running wind is generated. The dashed-dotted arrows indicate the path through which the running wind passes. The dotted arrows indicate the path through which heat is transmitted. First, the flow of the running wind will be described.

[0047] In region 52, the wind from the movement penetrates in the Y-axis direction. When the mover 7 moves, the upper capture part 1101 captures the wind from the movement. The region where the wind from the movement interferes with the lower block 703 and stagnates, resulting in a higher pressure than region 52, is defined as region 51. When the mover 7 moves, the lower capture part 1103 also captures the wind from the movement, just like the upper capture part 1101. The region where the wind from the movement interferes with the power receiving coil 301, the mounting jig 12, or the power conversion device 302 and stagnates, resulting in a higher pressure than region 52, is defined as region 53.

[0048] The traveling wind in regions 51 and 53 is collected in region 52, which penetrates in the Y-axis direction, by upper capturing part 1101 or lower capturing part 1103. That is, lower capturing part 1103 captures the traveling wind on the power receiving coil 301 side of region 52 and guides it to region 52. In region 52, in addition to the traveling wind traveling straight from the negative Y-axis direction, the traveling wind from regions 51 and 53 flows in. Therefore, the flow speed of the traveling wind in region 52 is faster than the flow speed in regions 51 or 53.

[0049] The lower capturing part 1103 captures the traveling wind that interferes with the power receiving coil 301 and stagnates when the mover 7 moves in the moving direction, and guides it to the region 52. The upper capturing part 1101 captures the traveling wind that interferes with the mover 7 and stagnates when the mover 7 moves in the moving direction, and guides it to the region 52.

[0050] Furthermore, the wind passing through region 52 is not only made up of components moving straight in the Y-axis direction, but also of components moving in the X-axis and Z-axis directions due to the inflow of the wind from region 51 or region 53, causing the direction of the wind to become irregular and turn into turbulent. That is, the wind in region 52 becomes turbulent due to the upper capture portion 1101 or the lower capture portion 1103.

[0051] Next, the conduction of heat generated from the power receiving coil 301 and the power conversion device 302 will be described. The heat generated from the power receiving coil 301 and the power conversion device 302 is conducted to the mounting jig lower surface 1203 of the mounting jig 12. The heat conducted to the mounting jig lower surface 1203 is conducted to the mounting jig side surface 1204 and the mounting jig upper surface 1202. The heat conducted to the mounting jig side surface 1204 and the mounting jig upper surface 1202 is dissipated by the traveling wind passing through the area 52.

[0052] The running wind that becomes turbulent in region 52 passes through while colliding with upper surface 1202 or side surface 1204 of the mounting jig, thereby improving the heat dissipation efficiency compared to when upper capture portion 1101 and lower capture portion 1103 are not present.

[0053] In addition, the upper capture portion 1101 and the lower capture portion 1103 are made of thin, lightweight plate material and are attached so that they extend parallel to the direction of movement, so that heat dissipation efficiency can be improved without being affected by factors that affect driving performance, such as air resistance and centrifugal force generated by the movement of the movable member 7.

[0054] As described above, in this embodiment, the power receiving coil 301 and the power conversion device 302 are fixed to the mounting jig 12, and the heat of the power receiving coil 301 and the power conversion device 302 is conducted to the mounting jig 12. When the mover 7 travels, the mounting jig 12 is cooled by the traveling wind passing through the region 52, and the mounting jig 12 acts as a heat sink, so that the heat of the power receiving coil 301 and the power conversion device 302 can be cooled.

[0055] The power receiving side is the side that moves with respect to the power transmitting side circuit 2, and the power transmitting side is the side that does not move with the power transmitting side circuit 2. In this embodiment, the mounting jig 12 needs to be attached to the power receiving side, but it is not necessary to provide a refrigerant supply device or air duct or the like over a wide area on the power transmitting side to cool the heat. The mounting jig 12 only needs to be large enough to mount the power conversion device 302 and the power receiving coil 301 and to dissipate heat through the area that penetrates in the direction of movement. Therefore, the contactless power transfer system 1 including the power transmitting side and the power receiving side has a simple configuration as a whole, and is capable of dissipating heat from the power receiving coil 301 and the power conversion device 302.

[0056] Since heat dissipation from heat-generating components on the power receiving side is possible with a simple configuration, it is possible to reduce the size, cost, and weight of the entire non-contact power transfer system 1 including the power transmitting side and power receiving side.

[0057] The mounting jig 12 is made by bending a single sheet of metal. Here, if the mounting jig 12 is constructed by bonding multiple components made of different materials together, it is conceivable that deformation of the components may cause gaps to form between the components, making it difficult for heat to be transmitted between the multiple components. However, in the present disclosure, since the mounting jig 12 is a single component, no gaps will form between the components due to deformation, reducing the possibility of heat being difficult to transmit.

[0058] In this embodiment, the surface of the mounting jig 12 attached to the lower block 703 is one of the surfaces constituting the rectangular tube. Furthermore, the power receiving coil 301 and the power converter 302 are fixed to the mounting jig 12, the power converter 302 is attached in a hollow portion inside the rectangular tube shape of the mounting jig 12, and the hollow portion has an area that penetrates in the moving direction of the mover 7 even when the power converter 302 is attached.

[0059] That is, the surface of the mounting jig 12 attached to the lower block 703 is one of the surfaces constituting the rectangular tube, so that it is easy to attach it to a moving body to which the non-contact power supply system 1 is not applied and the mounting strength is easy to maintain. Also, since the power receiving coil 301 and the power conversion device 302 are attached to the mounting jig 12, and the power conversion device 302 is attached to the hollow portion so as to have an area penetrating in the moving direction of the mover 7, it is possible to easily realize the non-contact power supply system 1 having high heat dissipation performance of the heat-generating component after the fact by simply attaching the mounting jig 12 to the lower block 703.

[0060] In addition, in this embodiment, the surface of the mounting jig 12 on which the power conversion device 302 is provided is the reverse side of the outer circumferential surface of the mounting jig 12 on which the power receiving coil 301 is attached. This allows the wiring between the power receiving coil 301 and the power conversion device 302 to be shortened, which enables the weight of the power receiving device to be reduced by shortening the wiring, or reduces the risk of disconnection, while enabling heat dissipation.

[0061] In addition, in this embodiment, the lower capturing part 1103 and the upper capturing part 1101 can turn the traveling wind in the area 52 into a turbulent flow, thereby improving the heat dissipation performance.

[0062] In this embodiment, the lower capturing part 1103 and the upper capturing part 1101 are provided, but only either the lower capturing part 1103 or the upper capturing part 1101 may be provided. In this case, the traveling wind passing through the area penetrating in the moving direction can be turned into turbulence, so that the heat dissipation performance can be improved compared to when neither is provided. However, when both the lower capturing part 1103 and the upper capturing part 1101 are provided, as in this embodiment, the heat dissipation performance can be further improved compared to when only either the lower capturing part 1103 or the upper capturing part 1101 is provided.

[0063] Instead of providing the upper capture part 1101, the lower block 703 may also have the structure of the upper capture part 1101. In this case, the same effect as when the upper capture part 1101 is provided is achieved. Instead of providing the lower capture part 1103, the power receiving coil 301 or the power conversion device 302 may also have the structure of the lower capture part 1103. In this case, the same effect as when the lower capture part 1103 is provided is achieved.

[0064] In the present embodiment, the mounting jig 12 has a rectangular tubular shape with a cross section that is a square, but is not limited to this. The cross section may be a polygonal tubular shape such as a pentagon, or may be a cylindrical shape.

[0065] Furthermore, in addition to the configuration in which the power receiving coil 301 or the power conversion device 302 is attached to the mounting jig 12, the electric load 4 to which the power conversion device 302 supplies electric power may be fixed to the mounting jig 12. In that case, heat can be dissipated not only from the power receiving coil 301 or the power conversion device 302 but also from the electric load 4. However, in this case, even if the electric load 4 is further provided, it is necessary to ensure that the hollow portion 1201 has a region penetrating in the moving direction of the mover 7.

[0066] Embodiment 2 Fig. 7 is a diagram of the power receiving device 30, the mover 7, the upper capture portion 1101, and the lower capture portion 1103 of the contactless power supply system 1 according to the second embodiment before assembly. Fig. 8 is a diagram showing the state in which the power receiving device 30, the mover 7, the upper capture portion 1101, and the lower capture portion 1103 of the contactless power supply system 1 according to the second embodiment are assembled. Descriptions of the same parts as those in the first embodiment will be omitted. The contactless power supply system 1 according to the second embodiment will be described with reference to Figs. 7 and 8.

[0067] In the first embodiment, the cutout 10 is provided so as to be U-shaped when the lower block 703 is viewed from the Y-axis direction. The cutout 10 in the second embodiment differs from the first embodiment in that the cutout 10 is provided so as to be V-shaped when the lower block 703 is viewed from the Z-axis direction. Also, the mounting jig 12 in the second embodiment differs from the first embodiment in that the mounting jig 12 in the second embodiment has a shape having a mounting jig middle surface 1205 between a mounting jig upper surface 1202 and a mounting jig lower surface 1203, compared to the mounting jig 12 in the first embodiment.

[0068] Also, in the first embodiment, the power converter 302 is provided in contact with the lower surface 1203 of the mounting jig, whereas in the second embodiment, the power converter 302 is provided in contact with the middle surface 1205 of the mounting jig, which is a difference from the first embodiment.

[0069] The lower block 703 has a notch 10 that penetrates the lower block in the Z-axis direction so that it has a square shape when viewed from the Z-axis direction. The notch 10 is sized to fit the mounting jig 12. The notch 10 penetrates the surface of the mover 7 on which the mounting jig 12 is provided.

[0070] The mounting jig 12 has a mounting jig middle surface 1205 between a mounting jig upper surface 1202 and a mounting jig lower surface 1203. The mounting jig middle surface 1205 is made of the same material as the mounting jig 12. The mounting jig middle surface 1205 is attached to the mounting jig side surface 1204 by, for example, welding. The mounting jig middle surface 1205 is thermally conducted to the surfaces that form the rectangular cylindrical shape (the mounting jig lower surface 1203, the mounting jig side surface 1204, and the mounting jig upper surface 1202). The mounting jig middle surface 1205 is the mounting surface.

[0071] The power converter 302 is provided between the mounting jig middle surface 1205 and the mounting jig upper surface 1202, in contact with the mounting jig middle surface 1205. The power converter 302 is attached to the mounting jig middle surface 1205. Heat from the power converter 302 is conducted to the mounting jig middle surface 1205. A heat dissipation promoting sheet material or the like may be added between the power converter 302 and the mounting jig middle surface 1205 to fill a gap at the time of joining and reduce thermal resistance. The mounting jig middle surface 1205 is positioned away from the mounting jig upper surface 1202 in the Z-axis direction to such an extent that the power converter 302 fits just between the mounting jig middle surface 1205 and the mounting jig upper surface 1202.

[0072] 8, the mounting jig 12 is fitted into the cutout 10, and the power conversion device 302 is provided in the cutout 10. The mounting jig 12 is fitted into the cutout 10 so that the space between the mounting jig middle surface 1205 and the mounting jig bottom surface 1203 has a hollow portion 1201 penetrating in the Y-axis direction.

[0073] 9 is a view of the power receiving device 30, the mover 7, the upper capture part 1101, and the lower capture part 1103 of the contactless power supply system 1 according to the second embodiment as viewed from the Y-axis direction. A hollow part 1201 penetrating in the Y-axis direction is provided between the mounting jig middle surface 1205 and the mounting jig lower surface 1203. That is, the region 52 is surrounded by the back side of the surface of the mounting jig 12 to which the power receiving coil 301 is attached and the back side of the surface of the mounting jig middle surface 1205 to which the power conversion device 302 is attached.

[0074] 10 is a YZ plan view of the power receiving device 30, the mover 7, the upper trapping part 1101, and the lower trapping part 1103 of the contactless power supply system 1 according to the second embodiment. The moving direction of the mover 7 is the Y-axis negative side (left side of the paper in FIG. 10). The dashed and dotted arrows indicate the path through which the traveling wind passes. The dotted arrows indicate the path through which heat is transmitted.

[0075] The wind from the moving element 7 passes through the area 52 in the Y-axis direction. When the mover 7 moves, the wind from the moving element 7 interferes with the lower block 703 and stagnates, so the pressure in the area 51 is higher than that in the area 52. The wind from the moving element 7 interferes with the power receiving coil 301 or the mounting jig 12 and stagnates, so the pressure in the area 53 is higher than that in the area 52.

[0076] Heat from the power conversion device 302 is conducted to the mounting jig middle surface 1205 and the mounting jig side surface 1204. The heat conducted to the mounting jig side surface 1204 is conducted to the mounting jig upper surface 1202 and the mounting jig lower surface 1203. The mounting jig middle surface 1205, the mounting jig side surface 1204 and the mounting jig lower surface 1203 are cooled and dissipated by the traveling wind that has become turbulent in the region 52. In addition, since the cutout portion 10 penetrates in the Z direction, the mounting jig upper surface 1202 is cooled by the traveling wind.

[0077] In the first embodiment, even when the power conversion device 302 is attached, the region 52, which is the region through which the cavity 1201 penetrates in the moving direction of the mover 7, is surrounded by the mounting jig upper surface 1202 and the upper surface (the surface on the positive side in the Z-axis direction) of the power conversion device 302. According to the present embodiment, the region 52 is surrounded by the reverse side of the surface of the mounting jig 12 to which the power receiving coil 301 is attached and the reverse side of the surface of the mounting jig middle surface 1205 to which the power conversion device 302 is attached.

[0078] That is, the surface opposite to the surface to which power receiving coil 301 or power converter 302 is fixed is cooled by the wind as the vehicle travels. This provides the same effects as the first embodiment, and further improves heat dissipation performance.

[0079] In addition, because the cutout 10 has a shape penetrating in the Z direction, heat can also be dissipated from the power conversion device 302 on the +Z direction side, improving heat dissipation performance compared to a case in which the cutout 10 does not have a shape penetrating in the Z direction. In addition, because the power conversion device 302 is provided in the cutout 10, the mover 7 and the power receiving device 30 of the wireless power transfer system 1 can be made smaller as a whole than a case in which the power conversion device 302 is not provided in the cutout 10.

[0080] In addition, the mounting jig middle surface 1205 is made of the same material as the mounting jig 12, and is attached to the mounting jig 12 by welding. This reduces the possibility that heat will not be conducted between the mounting jig 12 and the mounting jig middle surface 1205 due to deformation of the mounting jig middle surface 1205 or the mounting jig 12, etc.

[0081] Third embodiment Fig. 11 is a diagram of the power receiving device 30, the mover 7, the upper capture portion 1101, and the lower capture portion 1103 of the contactless power supply system 1 according to the third embodiment, as viewed from the Y-axis direction. Fig. 12 is a schematic diagram of the power receiving device 30, the mover 7, the upper capture portion 1101, and the lower capture portion 1103 of the contactless power supply system 1 according to the third embodiment when traveling. Descriptions of the same parts as those in the first embodiment will be omitted. The contactless power supply system 1 according to the third embodiment will be described with reference to Figs. 11 and 12.

[0082] The mounting jig 12 of the third embodiment differs from the mounting jig 12 of the first embodiment in that it has a rod-shaped thermal conductor 1206 fixed to the mounting jig upper surface 1202 and the mounting jig lower surface 1203 between the mounting jig upper surface 1202 and the mounting jig lower surface 1203. Also, the power conversion device 302 of the third embodiment differs from the power conversion device 302 of the first embodiment in that it is divided into two so as not to interfere with the thermal conductor 1206, and the two are connected by a cable (not shown). The rest is the same as the first embodiment.

[0083] The thermal conductor 1206 is a rod-shaped member having one end provided on the mounting jig lower surface 1203 and extending toward the mounting jig upper surface 1202. One end of the thermal conductor 1206 contacts the back surface of the surface on which the power receiving coil 301 is attached, and the other end of the thermal conductor 1206 contacts the back surface of another surface that constitutes a rectangular cylindrical shape and is different from the surface on which the power receiving coil 301 is attached. The thermal conductor 1206 is fixed to the mounting jig lower surface 1203 and the mounting jig upper surface 1202 by welding. The thermal conductor 1206 is made of the same material as the mounting jig 12. The mounting jig 12 has a rod-shaped thermal conductor 1206 in the hollow portion 1201 that is thermally conductive with the surface that constitutes the rectangular cylindrical shape.

[0084] The rod shape refers to a thickness (length of width in the X-axis direction) that does not significantly impede the flow speed of the traveling wind passing through the region 52. Here, the number and shape of the thermal conductors 1206 can be changed within a range that does not significantly impede the driving performance of the mover 7.

[0085] Thermal conductor 1206 is provided perpendicular to mounting jig lower surface 1203 and mounting jig upper surface 1202. In this manner, heat can be conducted from mounting jig lower surface 1203 to mounting jig upper surface 1202 over the shortest distance, thereby improving thermal conductivity.

[0086] 12 , a part of the traveling wind in the cavity 1201 collides with the thermal conductor 1206, forming a Karman vortex 54. This Karman vortex 54 flows while colliding with the mounting jig upper surface 1202, the power conversion device 302, the mounting jig side surface 1204, and the thermal conductor 1206, and promotes making the cavity 1201 turbulent.

[0087] Thus, according to this embodiment, by providing rod-shaped heat conductor 1206 between mounting jig upper surface 1202 and mounting jig lower surface 1203, it is possible to generate Karman vortices 54 in the traveling wind and promote turbulence. This makes it possible to further improve heat dissipation performance in addition to the effect of embodiment 1.

[0088] In addition, since the thermal conductor 1206 is provided inside the hollow portion 1201, the thermal conductor 1206 is directly cooled by the wind generated during running. This improves the heat dissipation performance compared to when the thermal conductor 1206 is not provided.

[0089] Since the thermal conductor 1206 of this embodiment is attached to the mounting jig lower surface 1203, the heat generated by the switching element 303 is conducted along the mounting jig lower surface 1203 not only to the mounting jig side surface 1204 but also to the thermal conductor 1206. This increases the number of paths for heat conduction compared to when the thermal conductor 1206 is not provided, thereby improving the heat dissipation performance.

[0090] Moreover, the thermal conductor 1206 is made of the same material as the mounting jig 12, and is attached to the mounting jig 12 by welding. This reduces the possibility that heat will not be conducted between the mounting jig 12 and the mounting jig inner surface 1205 due to deformation of the thermal conductor 1206 or the mounting jig 12, etc.

[0091] Incidentally, if the thermal conductor 1206 is provided on the lower surface 1203 of the mounting jig in the vicinity of the switching element 303 which is a heat generating component, heat can be efficiently conducted to the thermal conductor 1206 .

[0092] Although an example has been shown in which the power converter 302 is divided into two so as not to interfere with the thermal conductor 1206, the modification of the power converter 302 is not limited to this. For example, the power converter 302 may be provided with a hole penetrating in the Z-axis direction so as not to interfere with the thermal conductor 1206. In this case, the mounting jig 12 may be attached by welding the mounting jig upper surface 1202 or the mounting jig lower surface 1203 after the power converter 302 is attached. Even in this case, the same effect as described above can be achieved.

[0093] Although the example in which the thermal conductor 1206 is provided in the first embodiment has been described above, the thermal conductor 1206 may be provided in the second embodiment. In this case, it is provided between the mounting jig lower surface 1203 and the mounting jig middle surface 1205. In this way, in addition to the effect of the second embodiment, the heat dissipation performance can be further improved as described above.

[0094] Fourth embodiment Fig. 13 is a schematic diagram of the power receiving device 30, the mover 7, the upper capture part 1101, and the lower capture part 1103 of the contactless power supply system 1 according to the fourth embodiment during traveling. Explanation of the same parts as those in the first embodiment will be omitted. The contactless power supply system 1 according to the fourth embodiment will be explained with reference to Fig. 13.

[0095] The mounting jig 12, the power converter 302, the power receiving coil 301, and the lower capture part 1103 of the fourth embodiment are different in shape from the mounting jig 12, the power converter 302, the power receiving coil 301, and the lower capture part 1103 of the first embodiment. The rest are the same as those of the first embodiment.

[0096] The mounting jig 12, the power converter 302, and the power receiving coil 301 each have a quadrangular pyramid shape whose cross-sectional area in the XY plane decreases toward the region 52. The relationship between the cross-sectional area in the XY plane of the power converter 302 and the power receiving coil 301 and the distance in the Z-axis direction from the cavity 1201 is constant.

[0097] When viewed from the X-axis direction, the power converter 302, mounting jig 12, and power receiving coil 301 have a trapezoidal shape with the bottom surface of power receiving coil 301 (- side in the Z-axis direction) being the long side and the mounting jig top surface 1202 being the short side. The end faces of the power converter 302 and mounting jig 12 are aligned in the Y-axis direction, and the end faces of the mounting jig 12 and power receiving coil 301 in the Y-axis direction are aligned. The end faces in the movement direction of the power converter 302, mounting jig 12, and power receiving coil 301 are aligned, and protrude towards the movement direction as they move away from region 52.

[0098] The lower capturing portion 1103 has a trapezoidal shape with the longer side on the positive side in the Z axis direction and the shorter side on the negative side in the Z axis direction when viewed in a YZ axis plane.

[0099] In this embodiment, the end faces in the movement direction of the power receiving coil 301, the mounting jig 12, and the power conversion device 302 are aligned and protrude in the movement direction as they move away from the region 52, so that the traveling wind hitting the power receiving coil 301, the mounting jig 12, or the power conversion device 302 is easily guided to the region 52. Therefore, even if the lower capture portion 1103 is not present, the flow speed of the traveling wind in the region 52 can be increased, and the cooling of heat can be promoted.

[0100] The mounting jig 12, the power converter 302, and the power receiving coil 301 do not have to be in a quadrangular pyramid shape with a quadrangular XY plane, and may be in a polygonal pyramid shape with a polygonal XY plane. In this case as well, the same effects as described above can be obtained.

[0101] The configurations shown in the above embodiments are examples of the contents of the present disclosure, and may be combined with other known technologies, and parts of the configurations may be omitted or modified without departing from the gist of the present disclosure.

[0102] In addition, the configuration shown in the above embodiment has been described in the case where the contactless power supply system 1 is applied to a linear conveyance system, but the use is not limited to this, and the system can be used in general as a contactless power supply system for equipment that moves or rotates, such as industrial conveyance machines and electric vehicles. [Explanation of symbols]

[0103] 1 non-contact power transfer system, 2 power transmitting circuit, 3 power receiving circuit, 7 mover, 8 wheels, 9 fixed surface plate, 10 notch, 12 mounting jig, 30 power receiving device, 301 power receiving coil, 302 power conversion device, 303 switching element, 701 upper block, 702 middle block, 703 lower block, 1101 upper capture portion, 1102 opening, 1103 lower capture portion, 1201 hollow portion, 1202 upper surface of mounting jig, 1203 lower surface of mounting jig, 1204 side surface of mounting jig.

Claims

1. A transmitting element; a power receiving element that receives power from the power transmitting element in a non-contact manner at a position that is isolated from and faces the power transmitting element; a power conversion unit that converts the power received by the power receiving element and supplies the converted power to an electric load provided in a moving body that moves relative to the power transmitting element; a mounting jig having a cylindrical shape with a hollow portion on the inside, the power receiving element being mounted on the outer periphery of the cylindrical shape so as to conduct heat of the power receiving element, the power conversion unit being mounted inside the hollow portion so as to conduct heat of the power conversion unit, and the mounting jig being installed on the moving body so as to have an area through which the hollow portion penetrates in the moving direction of the moving body even when the power conversion unit is mounted; A non-contact power supply system having the above configuration.

2. The contactless power supply system according to claim 1 , wherein the surface of the mounting jig on which the power conversion unit is provided is a surface opposite to an outer circumferential surface of the mounting jig on which the power receiving element is attached.

3. The mounting jig further has a mounting surface in the hollow portion that is thermally conductive with a surface constituting the cylindrical shape, The power conversion unit is attached to the mounting surface, The contactless power supply system according to claim 1 , wherein the area is surrounded by a rear surface of the mounting jig on which the power receiving element is mounted and a rear surface of the mounting surface on which the power conversion unit is mounted.

4. The mounting jig further includes a rod-shaped thermal conductor in the hollow portion, the rod-shaped thermal conductor being thermally conductive with the surface constituting the cylindrical shape, The contactless power supply system according to any one of claims 1 to 3, characterized in that one end of the thermal conductor contacts the surface that constitutes the cylindrical shape and is opposite to the surface on which the receiving element is attached, and the other end of the thermal conductor contacts another surface that constitutes the cylindrical shape and is different from the surface on which the receiving element is attached.

5. 3. The contactless power supply system according to claim 2, wherein end faces of the power conversion unit, the mounting jig and the power receiving element in the movement direction are aligned and protrude toward the movement direction as they move away from the region.

6. A capture section that is fixed to the power receiving element or the mounting jig from the moving direction, and captures the running wind that interferes with the power receiving element and stagnates when the moving body moves in the moving direction, and guides it to the area; or a capture section that is fixed to the moving body from the moving direction, captures the traveling wind that interferes with the moving body and stagnates when the moving body moves in the moving direction, and guides the wind to the region; The contactless power supply system according to claim 1 , further comprising:

7. a power receiving element that receives electric power from the power transmitting element in a non-contact manner at a position that faces the power transmitting element in a spaced-apart relationship; a power conversion unit that converts the power received by the power receiving element and supplies the converted power to an electric load provided in a moving body that moves relative to the power transmitting element; a mounting jig having a cylindrical shape with a hollow portion on the inside, the power receiving element being mounted on the outer periphery of the cylindrical shape so as to conduct heat of the power receiving element, the power conversion unit being mounted inside the hollow portion so as to conduct heat of the power conversion unit, and the mounting jig being installed on the moving body so as to have an area through which the hollow portion penetrates in the moving direction of the moving body even when the power conversion unit is mounted; A power receiving device having the same.

8. A power transmitting element provided on a fixed portion; A mover that moves relative to the fixed part; a power receiving element that receives power from the power transmitting element in a non-contact manner at a position that is isolated from and faces the power transmitting element; a power conversion unit that converts the power received by the power receiving element and supplies the converted power to an electrical load provided in the movable element; a mounting jig having a cylindrical shape with a hollow portion on the inside, the power receiving element being mounted on the outer periphery of the cylindrical shape so as to conduct heat from the power receiving element, the power conversion unit being mounted inside the hollow portion so as to conduct heat from the power conversion unit, and the mounting jig being installed on the mover such that the hollow portion has an area penetrating in the moving direction of the mover even when the power conversion unit is mounted; A linear transport system having a

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