JP5309533B2 - Power supply system - Google Patents

Description

  The present invention relates to a power supply system that supplies driving power to a moving body.

  There is a case where electric power is supplied in a non-contact manner to a moving body such as a transport carriage. Patent Document 1 relates to such a power supply system. The transport cart of Patent Document 1 travels on a track. A pickup unit for non-contact power feeding is installed on the transport carriage. The pickup unit has an E-type core. A power supply line is laid on the track, and the E-type core is disposed so as to sandwich the power supply line when the transport carriage travels along the track. By supplying a high-frequency current to the feeder line, a magnetic flux generated around the feeder line generates an induced electromotive force in a pickup coil wound around the E-type core. As a result, electric power is supplied from the feeder line to the transport carriage.

JP 2002-354713 A

  The power supply line of Patent Document 1 is laid so as to extend along the track. In this case, the feeder line must be laid without slack so as not to contact the E-type core of the transport carriage when the transport carriage travels along the track. In order to lay the feeder line so as not to be slackened over the entire area of the track, it may require a great number of man-hours.

  An object of the present invention is to provide a power supply system in which man-hours necessary for system installation are suppressed.

Means and effects for solving the problems

A power supply system according to the present invention is a power supply system that supplies driving power to a mobile body, and includes a first magnetic core and a power supply unit that includes a first coil wound around the first magnetic core. A power receiving unit provided in the moving body, and a power source for supplying a current to the first coil. The power receiving unit includes a second magnetic core and a second coil wound around the second magnetic core. The power supply unit is configured to receive power from the power supply unit by an induced electromotive force generated in the second coil when the moving body passes through a magnetic field generated from the first coil. The first magnetic core has a C-shaped portion having a substantially C-shaped cross section in a direction orthogonal to the predetermined movement path. , Each other with respect to one direction Opposite and spaced apart from each other by a predetermined distance, the first and second opposing surfaces formed at the opening of the C-shaped portion, the C-shaped portion being along the predetermined movement path A plurality of the openings are arranged at a predetermined interval, and the opening is formed of a pair of opposed rail portions that extend across the plurality of C-shaped portions along the predetermined movement path and are separated from each other in the one direction. The first opposing surface is formed on one of the pair of opposing rail portions, and the second opposing surface is formed on the other, and the second magnetic core is adjacent to the first opposing surface. A third facing surface facing each other and a fourth facing surface facing the second facing surface close to each other at both ends of the second magnetic core in the one direction, and the moving body When moving along a predetermined movement path, substantially only in the first and second magnetic cores Closed path is moved between the first opposing face and the second opposing face as being formed through.

According to the power supply system of the present invention, the power supply unit has a configuration in which a coil is wound around a magnetic core. Therefore, the magnetic core can be formed from a material that is difficult to deform, or the magnetic core can be formed to have a shape that is difficult to deform. Thus, for example, the man-hours required for system installation can be reduced as compared with the case where the power supply line has to be laid down along the movement path. In addition, since a closed path magnetic path substantially along the first and second magnetic cores is easily formed, leakage magnetic flux can be suppressed and power can be efficiently supplied to the moving body. In addition, a closed path magnetic path is more reliably formed by the first and second magnetic cores.

In addition, the second magnetic core has a column portion extending in the one direction and a pair of opposed portions fixed to both ends of the column portion in the one direction, and each of the pair of opposed portions is And extending along the predetermined movement path such that a width in a direction along the predetermined movement path is longer than a width in a direction along the predetermined movement path and a direction orthogonal to both of the one direction. The third facing surface on the surface of the first facing surface in one of the pair of facing portions, and the fourth facing surface on the surface of the second facing surface in the other. Each is preferably formed.

Moreover, the width | variety in each of a pair of said opposing part may be smaller than the space | interval of the said C type part regarding the direction along the said predetermined movement path | route.

In the present invention, Ri Contact further comprises a track for supporting the movable body, before Symbol orbit, so that the moving body moves along the predetermined path of movement while traveling along the track It is preferable that it is laid. According to this, when the power receiving unit passes through a portion having a C-shaped cross-sectional shape, power can be reliably supplied to the power receiving unit, whereas the power receiving unit is positioned in a portion having a C-shaped cross-sectional shape. If not, the magnetic resistance between the first facing surface and the second facing surface can be increased to make it difficult for leakage flux to occur. Therefore, the efficiency of power supply to the moving body can be improved.

  A transport system 1 that is a preferred embodiment of the present invention will be described. FIG. 1 is a schematic configuration diagram of the transport system 1.

  The transport system 1 is installed, for example, in a semiconductor substrate manufacturing factory or the like, and transports various loads in the factory. The transport system 1 includes a track 100 and a transport cart 200 that travels on the track 100. The track 100 is laid horizontally so as to connect different positions in the factory. The transport carriage 200 travels along the track 100 while supporting various loads, and transports the loads between different positions in the factory. In the present embodiment, the transport carriage 200 travels in a certain direction along the track 100. In FIG. 1, an arrow in the vicinity of the transport cart 200 indicates the traveling direction of each transport cart 200. The track 100 branches from a single path into a plurality of paths at the branch portion 100a. The plurality of paths merge into one path again at the junction 100b. In the branching unit 100a, the transport cart 200 selects any one of the plurality of routes according to the load transport source and the transport destination, and travels along the selected route. A power supply unit 110 (described later) that supplies power to the transport carriage 200 is provided in the track 100, and the power supplied from the power supply panel 300 to the power supply unit 110 is supplied to the transport carriage 200.

  Hereinafter, the configuration of the track 100 and the transport carriage 200 will be described. 2 is a cross-sectional view taken along line II-II in FIG. FIG. 3 is a left side view of the transport carriage 200 traveling on the track 100. The track 100 includes a track body 101 that supports the carriage 200 and a power supply unit 110 that is fixed to the track body 101. The track main body 101 has a generally U-shaped shape that opens upward. The power supply unit 110 is disposed above the track main body 101. The power supply unit 110 is provided with a pair of power supply units 110L and 110R. The power feeding units 110 </ b> L and 110 </ b> R have a symmetrical shape with respect to the central axis A in the width direction of the track 100, and are disposed symmetrically with respect to the axis A.

  The power feeding units 110L and 110R have a pair of coils 111L and 111R arranged symmetrically with respect to the axis A. In addition, it has a pair of magnetic cores 117L and 117R arranged symmetrically with respect to the axis A. The coils 111L and 111R are wound around the magnetic cores 117L and 117R, respectively. The magnetic cores 117L and 117R have symmetrical shapes and are arranged symmetrically. Since the power supply units 110L and 110R have the same configuration, only one power supply unit 110L will be described below.

  The magnetic core 117L is made of a magnetic material such as iron. As the magnetic material, it is preferable to use an electric iron plate, an amorphous metal plate or the like with a small iron loss. The magnetic core 117 </ b> L includes a column part 112, a magnetic core lower part 113, a magnetic core upper part 114, an opposing rail part 115, and an opposing rail part 116. As shown in FIGS. 2 and 3, the magnetic core lower portion 113 has a flat plate shape that extends along the horizontal direction and extends along the length direction of the track 100. The magnetic core lower part 113 is fixed to the upper surface of the track body 101 via bolts and nuts. As shown in FIG. 2, the magnetic core lower portion 113 extends rightward from the left side surface of the track main body 101, and its tip is curved upward. A counter rail portion 116 is fixed to the tip of the curved portion.

  The magnetic core 117L has a C-shaped portion 117C extending along the alternate long and short dash line in FIG. The C-shaped portion 117C protrudes above the magnetic core lower portion 113. As shown in FIG. 2, the C-shaped portion 117 </ b> C has a generally C-shaped shape when viewed from the length direction of the track 100, and opens toward the axis A. That is, it has a C-shaped shape with respect to a cross section orthogonal to the traveling direction of the transport carriage 200. The opposing rail portions 115 and 116 correspond to the opening of the C-shaped portion 117C. A plurality of C-shaped portions 117C are provided, and are arranged in the length direction of the track 100 at a constant interval L1, as shown in FIG.

  As shown in FIG. 2, the C-shaped portion 117 </ b> C includes a support column portion 112, a magnetic core lower portion 113, a magnetic core upper portion 114, and opposed rail portions 115 and 116. The support column 112 is fixed to the upper surface of the magnetic core lower portion 113. The support column 112 extends along the vertical direction from the left end in FIG. A magnetic core upper portion 114 is fixed to the upper end of each column portion 112. The magnetic core upper part 114 extends from the upper end of the column part 112 toward the right in FIG. 2, and the tip thereof is curved downward. An opposing rail portion 115 is fixed to the tip of the curved portion.

  As shown in FIGS. 2 and 3, the opposing rail portions 115 and 116 both extend along the horizontal direction and have a flat plate shape extending along the length direction of the track 100. Further, the opposing rail portions 115 and 116 have the same width in the width direction of the track 100. The lower surface (first opposing surface) of the opposing rail portion 115 and the upper surface (second opposing surface) of the opposing rail portion 116 are at the same position in the width direction of the track 100 and face each other in the vertical direction. Further, these surfaces are arranged so as to be separated from each other by a distance slightly longer than the height of a power receiving unit 210L described later.

  The coil 111L is wound around the support portion 112 of the magnetic core 117L. Thus, when a current flows through the coil 111 </ b> L, a magnetic field is generated around the coil 111, and a magnetic path is formed along the support column 112, the lower magnetic core 113, and the upper magnetic core 114. In the space between the opposing rail portions 115 and 116, magnetic flux is generated along a path connecting the lower surface of the opposing rail portion 115 and the upper surface of the opposing rail portion 116. As will be described later, the carriage 200 is supplied with electric power by a magnetic interaction with a magnetic field generated between the opposed rail portions 115 and 116.

  Hereinafter, the structure of the opposing rail parts 115 and 116 in the branch part 100a and the junction part 100b is demonstrated. FIG. 4A is a plan view of the vicinity of the branching portion 100a of the track 100 surrounded by the one-dot chain line in FIG. FIG. 4B is a plan view of the vicinity of the merging portion 100b of the track 100 surrounded by the one-dot chain line in FIG. In the branch part 100a, the track 100 branches into two branch paths 100c and 100d from the left to the right in FIG. The branch paths 100c and 100d merge into one path from left to right in FIG. In FIG. 4A, one of the opposing rail portions 115 laid on the portion of the track 100 before branching is referred to as an opposing rail portion 115a, and the other as an opposing rail portion 115b. At this time, the opposing rail portion 115a extends straight along the branch path 100c. On the other hand, the opposing rail part 115b is curved along the branch path 100d.

  In the branch path 100c, an opposing rail portion 115c that is paired with the opposing rail portion 115a in the width direction of the track 100 is laid. In addition, an opposing rail portion 115d that is paired with the opposing rail portion 115b in the width direction of the track 100 is laid on the branch path 100d. The opposing rail portions 115c and 115d do not extend to a portion surrounded by the alternate long and short dash line in FIGS. 4A and 4B, and are not continuous with any of the opposing rail portions 115a and 115b. In addition, the opposing rail part 116 is arrange | positioned so that it may just overlap with the opposing rail part 115b in planar view in any location of the track | orbit 100 including the branch part 100a, the junction part 100b, and the branch paths 100c and 100d. The transport carriage 200 is supplied with power from the pair of left and right opposing rail portions 115 and 116 in FIG. However, at the position within the alternate long and short dash line in FIG. 4 (for example, the position 200b in FIG. 4), power is supplied only from the left and right opposing rail portions 115 and 116.

  The transport carriage 200 includes a loading platform 221 and a frame 222 that supports the loading platform 221. The frame 222 is disposed in the track 100 when the transport carriage 200 travels on the track 100. The loading platform 221 is supported by the frame 222 so as to be positioned above the track 100.

  The transport carriage 200 has traveling wheels 231 and guide rollers 232 and 233. The traveling wheel 231 is supported by the frame 222 via the axle 234, and supports the entire transport carriage 200 on the bottom surface of the track body 101. When the transport carriage 200 moves along the track 100, the traveling wheel 231 is also driven to rotate about the axle 234 as a rotation axis. The guide rollers 232 and 233 are supported by the frame 222 by support shafts 235 and 236, respectively. The support shafts 235 and 236 support the guide rollers 232 and 233 so as to rotate in a horizontal plane. Both guide rollers 232 and 233 are in contact with the inner surface of the track body 101 from the horizontal direction. And if the conveyance trolley 200 moves along the track | orbit 100, it will follow and rotate. By such traveling wheels 231 and guide rollers 232 and 233, the transport carriage 200 can travel horizontally along the track 100 without shifting in the width direction of the track 100.

  The transport carriage 200 is configured to travel by a so-called linear motor system. For this reason, the transport carriage 200 has a primary coil core 241 for linear motor travel. In the frame 222, a linear motor drive circuit (not shown) is provided for flowing a current through the coil of the primary coil core 241. On the other hand, a secondary permanent magnet 120 for linear motor travel is fixed at a position facing the primary coil iron core 241 on the bottom surface in the track body 101. The above linear motor drive circuit causes the carriage 200 to move along the track 100 by the magnetic interaction between the permanent magnet 120 and the primary coil core 241 with the current flowing through the coil of the primary coil core 241. To control.

  The transport carriage 200 has a power receiving unit 210 for receiving power supplied to the linear motor driving circuit and the like. The power receiving unit 210 is provided with a pair of power receiving units 210L and 210R. As shown in FIG. 2, the power receiving units 210 </ b> L and 210 </ b> R have a symmetrical shape with respect to the axis A, and are disposed symmetrically with respect to the axis A. The power receiving units 210 </ b> L and 210 </ b> R receive power supply from the power supply unit 110 by induced electromotive force generated when passing through the magnetic field generated from the power supply unit 110. Note that the power receiving units 210L and 210R have symmetrical shapes with respect to the axis A in FIG. 2 and are arranged symmetrically. Other than that, since they have the same configuration, only one power receiving unit 210L will be described below.

  The power receiving unit 210 </ b> L includes a coil 211 and a magnetic core 212. The coil 211 is wound around the magnetic core 212. The coil 211 is connected to the linear motor drive circuit and the like, and is configured to supply power to the linear motor drive circuit and the like by the induced electromotive force generated in the coil 211. Similarly to the magnetic core 117, the magnetic core 212 is made of a magnetic material such as iron, and is fixed to the frame 222 via the support frame 213. The magnetic core 212 includes a facing portion 212a, a facing portion 212b, and a support column portion 212c. The column portion 212c extends along the vertical direction, and the opposing portion 212a is fixed to the upper end and the opposing portion 212b is fixed to the lower end. Each of the facing portions 212a and 212b has a flat plate shape extending along the horizontal direction. As shown in FIG. 3, each of the facing portions 212a and 212b extends in the length direction of the track 100, and has a length L2 smaller than the above-described L1 in this direction.

  As shown in FIG. 2, the upper surface (third facing surface) of the facing portion 212a is close to and faces the lower surface of the facing rail portion 115 of the magnetic core 117L. Further, the upper surface of the facing portion 212 a has substantially the same width as the lower surface of the facing rail portion 115 and the width direction of the track 100, and is arranged so as to overlap the lower surface of the facing rail portion 115 in the width direction of the track 100. Yes. As shown in FIG. 2, the lower surface (fourth opposing surface) of the opposing portion 212b is also close to and opposed to the upper surface of the opposing rail portion 116 of the magnetic core 117L. In addition, the lower surface of the facing portion 212b has substantially the same width as the upper surface of the facing rail portion 116 and the width direction of the track 100, and is disposed so as to overlap the lower surface of the facing rail portion 116 in the width direction of the track 100. Yes. The distance between the facing portion 212a on the transport carriage 200 side and the facing rail portion 115 on the track 100 side, and the distance between the facing portion 212b on the carriage side and the facing rail portion 116 on the track side are all constant. It is kept in.

  FIG. 5 is a circuit diagram showing an electrical configuration in which a current is passed through the coils 111L and 111R on the track 100 side. The coils 111L and 111R are both connected to the feeder line 302 in parallel. The power supply panel 300 includes an alternating current source 301 and is configured to flow an alternating current having a predetermined frequency through the feeder line 302.

  Hereinafter, a mechanism in which the transport carriage 200 receives power supply will be described. When a current flows through the coils 111L and 111R of the power supply unit 110, a magnetic field having a strength corresponding to the current value and the number of turns of the coil is generated around these coils. This magnetic field generates a magnetic flux passing through the magnetic cores 117L and 117R. Here, the density of the magnetic flux increases according to the magnetic permeability of the magnetic cores 117L and 117R. Then, a magnetic field is generated in the space between the opposing rail portions 115 and 116 that is the opening of the C-shaped portion 117C.

  On the other hand, when the transport carriage 200 travels along the track 100, the power receiving unit 210 passes between the opposing rail portions 115 and 116. And the power receiving unit 210 passes the location in which the C type | mold part 117C was formed in the electric power feeding unit 110 one after another. Hereinafter, power supply from the power supply unit 110L to the power reception unit 210L will be described. The power supply from the power supply unit 110R to the power reception unit 210R is the same, and the description thereof is omitted.

  FIG. 6A and FIG. 6B illustrate a case where the power receiving unit 210L is located at a position where the C-shaped portion 117C is formed in the power feeding unit 110L. FIGS. 6C and 6D show a case where the power receiving unit 210L is not located at the place where the C-shaped portion 117C is formed. FIG. 6A and FIG. 6C are front views of a portion where the C-shaped portion 117C is formed. FIGS. 6B and 6D are views of FIGS. 6A and 6C viewed from the left side.

  As shown in FIGS. 6A and 6B, the power receiving unit 210L passes through the magnetic field generated between the opposing rail portion 115 and the opposing rail portion 116. The magnetic field between the opposing rail part 115 and the opposing rail part 116 generates a magnetic flux that passes through the magnetic core 212 of the power receiving unit 210L. The density of the magnetic flux increases according to the magnetic permeability of the magnetic core 212. Then, an induced electromotive force having a magnitude corresponding to the time change of the magnetic flux passing through the coil 211 of the power receiving unit 210L is generated in the coil 211. As a result, electric power is supplied to the linear motor drive circuit and the like.

  Here, it is preferable that the distance between the opposing rail part 115 and the opposing part 212a and the distance between the opposing rail part 116 and the opposing part 212b are adjusted to be as small as possible. As a result, a closed path that passes through only the inside of the C-shaped portion 117 </ b> C and the magnetic core 212 is formed almost without passing through the air, such as a rectangle C drawn with a two-dot chain line in FIG. 6A. Therefore, since a magnetic path along a closed path that passes only through the inside of the magnetic core is easily formed, there is little leakage magnetic flux, and efficient power supply is realized.

  As shown in FIGS. 6C and 6D, when the power receiving unit 210L is not located at the place where the C-shaped portion 117C is formed, the space between the opposing rail portions 115 and 116 is greatly opened. . Therefore, the magnetic resistance in such a space is very large compared to FIGS. 6 (a) and 6 (b). Thus, when the power receiving unit 210L is not located at the place where the C-shaped portion 117C is formed, it can be considered that there is substantially no leakage magnetic flux. That is, when the power receiving unit 210L is not located at the location where the C-shaped portion 117C is formed, the loss of power generated on the power feeding unit 110 side due to the leakage magnetic flux at this location is sufficiently small.

  Hereinafter, the configuration of the present embodiment is compared with the reference embodiment shown in FIG. The reference form of FIG. 7 shows a configuration of a power feeding method different from the above embodiment. This reference form has a feeder 901 laid along the track 900. A transformer 910 that receives power supply from the power supply line 901 is provided on the transport carriage side. FIG. 7 is a front view of the periphery of the transformer 910 and includes a side plate of the track 900 and a longitudinal section of the feeder line 901. The feed line 901 extends in the front-rear direction of FIG. 7 and is supported on the track 900 via the support portion 902. The transformer 910 includes a transformer core 912 having an E-shape and a coil 911 wound around the transformer core 912. The coil 911 is disposed in the vicinity of the root of the central foot portion among the three foot portions of the transformer core 912 aligned in the vertical direction. The power supply line 901 is disposed between the three legs. When a current flows through the feeder line 901, a magnetic field is generated around the feeder line 901, and a magnetic flux passing through the transformer core 912 is generated. When the amount of the magnetic flux passing through the coil 911 changes with time, an induced electromotive force is generated in the coil 911.

  The reference form of FIG. 7 has the following problems. First, the power supply line 901 is laid so as to extend along the track 900, but must be laid without being loosened over the entire area of the track 900 so as not to contact the transformer core 912. However, since the power supply line 901 is deformed by its own weight or temperature change, it is difficult to lay the power supply line 901 so as not to be loosened over the entire area of the track 900. Also, if a single continuous power supply line 901 is laid over the entire area of the track 900, the overall impedance of the power supply line 901 becomes large and it becomes difficult to supply power. Therefore, the power supply line 901 is divided into appropriate lengths. There is a need to. As described above, the reference form of FIG. 7 may require a large number of man-hours for laying the feeder line 901.

  Further, an E-shaped core such as the transformer core 912 is opened in one direction (left side in FIG. 7). Therefore, a large leakage magnetic flux is generated in the magnetic coupling between the coil 911 wound around the transformer core 912 and the power supply line 901. Therefore, power loss due to leakage magnetic flux may increase.

  On the other hand, according to the above-described embodiment, the power supply unit 110 includes the magnetic cores 117L and 117R and the coils 111L and 111R. The magnetic cores 117 </ b> L and 117 </ b> R extend along the track 100, but the opposing rail portions 115 and 116 and the magnetic core lower portion 113 are plate-like members made of iron or the like, and are less likely to loosen than the power supply line 901. For this reason, there is no difficulty of laying a long power supply line without slackening, and a great man-hour as in the reference embodiment of FIG. 7 is not required.

  Further, according to the present embodiment, the power receiving unit 210 receives power supply from the power feeding unit 110 when the power receiving unit 210 passes through the location where the C-shaped portion 117 </ b> C is provided in the power feeding unit 110. At this time, unlike the transformer core 912, the magnetic cores 117L and 117R do not open to one side (see FIG. 6A), and a closed path magnetic path along the magnetic core is easily formed, so that power can be supplied efficiently. The On the other hand, when the power receiving unit 210 is not present at the location where the C-shaped portion 117C is provided, the magnetic resistance at this location increases, so the leakage flux is small, and the power loss due to the leakage flux is small.

  Moreover, according to this embodiment, it is not necessary to divide the opposing rail parts 115 and 116, and it can form integrally. Therefore, when the transport carriage 200 travels along the track 100, it is possible to receive power supply from the opposing rail portions 115 and 116 without a break.

  Furthermore, also in the branch part 100a and the junction part 100b as shown in FIG. 4, electric power can be supplied to the transport carriage 200 from at least one of the opposing rail parts 115 and 116. Therefore, it is possible to continuously supply power also in the branch part 100a and the junction part 100b.

<Modification>
The above is a description of a preferred embodiment of the present invention, but the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope described in the means for solving the problem. It is possible.

  For example, in the above-described embodiment, power supply to the transport carriage 200 is assumed. However, it may be used for power supply to other mobile units. In addition, although it is assumed that the transport carriage 200 travels along the track 100, the present invention may be applied to a moving body that moves freely without being restricted by the track or the like.

  In the above-described embodiment, it is assumed that two power receiving units 210 are provided in one transport cart 200. However, one power receiving unit 210 may be provided in one transport cart 200, or three or more power receiving units 210 may be provided.

  In the above-described embodiment, as shown in FIG. 2, the C-shaped portion 117C is provided in the magnetic cores 117L and 117R, and the magnetic core 212 on the power receiving unit 210 side has an I-shape. Thus, a closed path magnetic path that substantially passes only inside the magnetic core is formed. However, the shape of the magnetic core may be any shape as long as a closed path magnetic path is easily formed by the magnetic core on the power supply unit 110 side and the magnetic core on the power reception unit 210 side. For example, the magnetic core on the power supply unit 110 side may have an I-shape, and the magnetic core 212 on the power reception unit 210 side may have a C-shape. In addition, one has a U-shaped shape, and the other has a U-shaped left-right reversed shape. A magnetic path may be formed.

  In the above-described embodiment, the magnetic cores 117L and 117R of the power supply unit 110 have an angular shape. However, these magnetic cores may have a shape with rounded corners.

It is a front view of the conveyance system concerning one embodiment of the present invention. It is the II-II sectional view taken on the line of FIG. It is a left view of the conveyance trolley | bogie which drive | works the track | orbit of FIG. FIG. 2 is a plan view of the vicinity of a branching part and a joining part of the track in FIG. 1. FIG. 2 is a circuit diagram showing an electrical configuration for passing a current through a coil on the track side in FIG. 1. 6 (a) and 6 (c) are front views of a portion where a C-shaped portion is formed in the track of FIG. 6 (b) and 6 (d) are views of the trajectory of FIGS. 6 (a) and 6 (c) as viewed from the left side. It is a front view of the electric power feeding structure of the reference form different from this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Transfer system 100 Track | orbit 110 Power supply unit 117C C type | mold part 200 Conveyance carriage 210 Power receiving unit 300 Power supply panel 111, 211 Coil 115, 116 Opposite rail part 117, 212 Magnetic core

Claims (4)

A power supply system that supplies power for driving to a mobile body,
A power supply unit having a first magnetic core and a first coil wound around the first magnetic core;
A power receiving unit provided on the moving body, the power receiving unit having a second magnetic core and a second coil wound around the second magnetic core;
A power source for passing a current through the first coil;
The power supply unit is configured to receive power from the power supply unit by an induced electromotive force generated in the second coil when the moving body passes through the magnetic field generated from the first coil. Move along a predetermined route in the vicinity ,
The first magnetic cores have C-shaped portions having a substantially C-shaped cross section with respect to a direction orthogonal to the predetermined movement path, and are opposed to each other in one direction and are mutually separated by a predetermined distance. Having first and second opposing surfaces formed in the opening of the C-shaped part spaced apart from each other;
A plurality of the C-shaped portions are arranged at predetermined intervals along the predetermined movement path;
The opening is formed of a pair of opposed rail portions that extend across the plurality of C-shaped portions along the predetermined movement path and are spaced apart from each other in the one direction,
The first opposing surface is formed on one of the pair of opposing rail portions, and the second opposing surface is formed on the other,
The second magnetic core has a third facing surface facing the first facing surface and a fourth facing surface facing the second facing surface. A closed path that is provided at both ends of the magnetic core in the one direction and substantially passes only through the first and second magnetic cores is formed when the moving body moves along the predetermined movement path. The power supply system moves between the first facing surface and the second facing surface . The second magnetic core has a column portion extending in the one direction and a pair of opposed portions fixed to both ends of the column portion in the one direction;
  Each of the pair of opposed portions has a width in a direction along the predetermined movement path longer than a width in a direction along the predetermined movement path and a direction perpendicular to both directions of the one direction. Extending along a predetermined path of travel,
  Of the pair of opposing portions, the third opposing surface is formed on the surface on the first opposing surface side in one, and the fourth opposing surface is formed on the surface on the second opposing surface side in the other. The power supply system according to claim 1, wherein: 3. The power supply system according to claim 2, wherein a width of each of the pair of facing portions is smaller than an interval between the C-shaped portions with respect to a direction along the predetermined movement path. Ri All further comprising a track for supporting the movable body,
Before SL trajectory, to any one of claims 1 to 3, wherein the moving body is characterized in that it is laid so as to move along a predetermined moving path when traveling along said track The power supply system described.

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