JP3324408B2 - Non-contact power feeding core, power receiving device and mobile body in mobile body - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is provided with a power receiving device attached to a moving body running on a guide rail for taking in electric power from an alternating current flowing through a power supply line wired along the guide rail by electromagnetic induction. The present invention relates to a non-contact power feeding core, a power receiving device, and a moving body in a moving body.

[0002]

2. Description of the Related Art Conventionally, there has been proposed a monorail-type transfer device (moving body) which travels along a guide rail provided on a ceiling and transfers a load between stations in a factory or a warehouse. In addition, as a power supply method of this type of transport device, a pickup unit is attached to a moving body in a state where the pickup unit is opposed to a power supply line wired on a guide rail, and the pickup unit is used to remove an alternating current (high frequency current) flowing through the power supply line. 2. Description of the Related Art A non-contact power supply system that takes in electric power using an electromagnetic induction effect is known (for example, Japanese Patent Laid-Open No. 5-207606).

In this type of non-contact power supply system, FIG.
As shown in FIG. 7, the pickup unit 81 includes an E-shaped core 83 which is opposed to the two E-shaped cores 83 so as to cover two power supply lines 82 wired in a reciprocating path parallel to each other along the guide rail.
And a power receiving coil 84 wound around the central leg 83a.
And A high frequency current flowing through the power supply line 82 forms a magnetic circuit in the direction of the magnetic flux in the E-shaped core 83 as indicated by an arrow in the figure, and a current is induced in the coil 84 based on the magnetic circuit.

[0004] However, conventionally, since the core 83 is formed of ferrite, it is difficult to process the core 83 at the time of manufacturing, and there is a problem that the core 83 is chipped during use. If chipping or the like occurs, a portion where a magnetic circuit is not formed is formed in the core 83, which causes a reduction in power supply efficiency. So, Core 8
It is conceivable that 3 is made of a ferromagnetic material composed of a metal such as iron (for example, silicon steel). For example, as shown in FIG. 13, it is conceivable to manufacture a core (iron core) 83 by stacking and joining a plurality of single plates 85 made of E-shaped silicon steel or the like.
With such a metal core 83, problems such as chipping can be solved.

[0005]

By the way, the coil 84
When the current is induced in the core 83, the feed line 8
2, a main magnetic flux is generated in a direction opposite to the main magnetic flux of the magnetic circuit formed in the core 83 by the high-frequency current flowing through the core 83, so that the main magnetic flux is disturbed by the interference between the two and the leakage magnetic flux φ shown in FIG.
Occurs. However, if the core 83 is made of a metal such as silicon steel, both ends of the core 83 (both ends in a direction orthogonal to the magnetic circuit), especially the end surface area of the center leg 83a around which the coil 84 is wound, are shown in FIG. As shown in FIG. 15, an eddy current (arrow portion) I is generated by the leakage magnetic flux φ. Therefore, there is a problem in that both end portions of the center leg 83a of the core 83 generate heat due to the eddy current.

The heat generated at the end face of the center leg 83a causes damage to the coil 84. Therefore, in order to avoid damage to the coil 84 due to this heat generation, an electric wire having a high heat-resistant coating material must be used as the material of the coil 84, and in this case, the manufacturing cost of the pickup unit 81 increases. Also incur the problem. Therefore, conventionally, for such a reason, the core 83 has not been made of a metal such as silicon steel.

The present invention has been made in view of the above-mentioned problems, and has as its object to reduce heat generation due to eddy current generated when an iron core is used, and to eliminate the possibility of problems such as chipping of a core. An object of the present invention is to provide a non-contact power feeding core, a power receiving device, and a moving body in a moving body that can be made of metal.

[0008]

In order to solve the above-mentioned problems, according to the present invention, an electromagnetic wave is supplied from an alternating current flowing through a power supply line attached to a moving body running on a guide rail and wired to the guide rail. An iron core around which a power receiving coil for obtaining electric power by inductive action is wound, wherein the iron core is configured to cut off a path of an eddy current generated by leakage magnetic flux in a direction parallel to the power supply line in the iron core. Is formed.

[0009] According to the second aspect of the present invention, the first aspect is described.
In the non-contact power feeding core in the moving body described above,
The heart has a central leg around which the power receiving coil is wound
An E-shaped iron core, wherein the blocking means is provided on the central leg.
ing. According to a third aspect of the present invention, in the non-contact power feeding core of the moving body according to the first aspect, the interrupting unit is configured to be arranged in a direction orthogonal to a magnetic circuit formed in the iron core based on an alternating current flowing through the power feeding line. , At least both end portions of a coil winding portion around which the power receiving coil is wound.

[0010] In the invention described in claim 4 is the non-contact power supply cores in a mobile according to any one of claims 1 to 3, wherein the blocking means is a gap portion. In the invention described in claim 5, either one of claims 1 to 3
The contactless power supply cores in a mobile body according to an item, the blocking means is a blocking layer made of a material having a sufficiently high electrical resistance than the insulating material or the core. Here, the electric resistance sufficiently higher than that of the iron core means a resistance value such that the eddy current can be substantially divided by the blocking layer.

According to a sixth aspect of the present invention, in the non-contact power feeding core of the moving body according to any one of the first to fifth aspects, the iron core is a single plate having the same shape. A plurality of magnetic circuits are stacked in a direction orthogonal to the magnetic circuit to be formed.

According to a seventh aspect of the present invention, in the non-contact power feeding core in the moving body according to the sixth aspect , the iron core sandwiches the two C-type iron cores, each of which is a single plate laminated, with the blocking layer interposed therebetween. Is an E-shaped iron core joined in an E-shape.

[0013] In the invention according to claim 8 , the power receiving device has the power receiving coil wound around the coil winding portion, and the iron core according to any one of claims 1 to 7. Is provided.

According to a ninth aspect of the present invention, there is provided a moving body including the power receiving device according to the eighth aspect . (Operation) Therefore, according to the first aspect of the present invention, a magnetic circuit is formed in the iron core by the alternating current flowing through the power supply line wired to the guide rail when the mobile terminal is used by being attached to the moving body. At this time, since the magnetic flux of the magnetic flux in the opposite direction to form a magnetic circuit by alternating current induced in the power receiving coil is formed, parallel to the feed line to the core by the disturbance of the magnetic flux orientation
Leakage magnetic flux occurs. An eddy current is likely to be generated in the iron core due to this leakage magnetic flux, but since the interrupting means is formed in the iron core so as to interrupt the path of the eddy current to be generated, a comparison is made when the current path is not interrupted. As a result, the eddy current relatively generated decreases. Therefore, heat generation of the iron core due to the eddy current is suppressed to a small value.

According to the second aspect of the present invention, the shutoff means
Is provided on the central leg of the E-shaped core,
Cuts off the path of eddy currents that are generated in the central leg
Is done. As a result, heat generation at the center leg is kept small.
You. According to the third aspect of the present invention, the eddy current due to the leakage magnetic flux is easily generated at both ends of the iron core in a direction orthogonal to the magnetic circuit formed on the iron core. In particular, the power receiving coil is wound around the iron core. A relatively large eddy current is generated at both ends of the coil winding portion. Since the cutoff means is formed at least at both end portions of the coil winding portion, heat generation of the iron core can be effectively suppressed.

According to the fourth aspect of the present invention, the gap formed in the iron core blocks the path of the eddy current generated due to the leakage magnetic flux, so that the eddy current is relatively suppressed. Can be As a result, heat generation of the iron core is suppressed to a small value.

According to the fifth aspect of the present invention, the path of the eddy current generated due to the leakage magnetic flux is interrupted by the insulating layer formed on the iron core or the interrupting layer made of a material having a higher electric resistance than the iron core. Therefore, the eddy current is relatively suppressed. As a result, heat generation of the iron core is suppressed to a small value.

According to the sixth aspect of the present invention, the iron core is
A single plate of the same shape is formed by laminating a plurality of single plates in a direction orthogonal to a magnetic circuit formed on the iron core. By selecting the number of laminated veneers, iron cores having different sizes (lengths) can be manufactured. That is, it is possible to share a veneer for iron cores of different sizes. Also, since only one type of veneer is used, the material cost is relatively low.

According to the seventh aspect of the present invention, the E-shaped iron core is formed by joining two C-shaped iron cores formed by laminating single plates of the same shape in an E-shape with a blocking layer interposed therebetween. . for that reason,
It becomes possible to manufacture an E-shaped core in which a blocking layer is formed on a coil winding portion (central leg portion) by using only one type of veneer.

According to the invention as set forth in claim 8 , in the power receiving device, the iron core according to any one of claims 1 to 7 , wherein the power receiving coil is wound around the coil winding portion. Since it is provided, the same operation as the invention described in any one of claims 1 to 7 can be obtained.

According to the ninth aspect of the present invention, since the movable body is provided with the power receiving device according to the eighth aspect ,
The same operation as the eighth aspect is obtained.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG. 6 shows a transport body 1 as a moving body in the present embodiment. As shown in the figure, a carrier 1 is mounted on a guide rail 2 erected on a ceiling so as to be able to travel in a suspended state.

The carrier 1 includes a pair of front and rear drive wheels 3 and driven wheels (not shown), and a plurality of sets of guide wheels 4. Each of the wheels 3, 4 and the like is supported on a pair of front and rear steering portions 5 provided on the upper part of the main body 1a so as to be rotatable in a horizontal plane, and can be steered according to the curvature of the guide rail 2. A traveling motor 6 for driving the driving wheels 3 is also provided on the steering unit 5.

A power supply line 8 is supported on the rear surface (the right side surface in FIG. 6) of the guide rail 2 in a state of being fitted to the tip of a support member 7 fixed at predetermined intervals in the length direction. 2
The power supply lines 8 are connected in a loop at the end of the guide rail 2 and are arranged in parallel with each other at a predetermined interval in the traveling area of the transport body 1. The power supply line 8 is connected to a power supply device (not shown) installed on the ground side, and a high-frequency current flows through the power supply line 8.

A power receiving device (pickup device) 9 is supported on each steering unit 5 so as to face the power supply line 8 in a non-contact manner. The power receiving device 9 includes an E-shaped iron core (E-shaped core) 10 having a substantially E-shaped cross section as an iron core, and a power receiving coil (hereinafter simply referred to as a coil) wound around its central leg 10a as a coil winding portion. ) 11 and is attached to the carrier 1 such that the coil 11 is disposed substantially at the center between the two power supply lines 8. In addition, the power receiving device 9 is provided in a pair on the front and back of the carrier 1, and both are electrically connected in series.

Next, the structure of the E-shaped iron core 10 will be described with reference to FIGS. As shown in FIG.
Is formed by joining two C-shaped iron cores 20 shown in FIG. 2B and joining them in an E-shape with an adhesive. The two C-shaped cores 20 are joined at a fixed distance via an adhesive so that there is no conduction at the joint surface, and the central leg 10a of the E-shaped core 10 passes through the center line thereof. It is in a state of being divided into two by a blocking layer 21 as a blocking means made of the formed adhesive.

The C-shaped iron core 20 is formed by bonding a plurality of single plates 22 made of substantially C-shaped silicon steel as shown in FIG. 2A with an adhesive so as to have a predetermined length. Is formed. The veneer 22 is formed by punching a flat plate of silicon steel using a C-shaped punching die. Then, two C-shaped iron cores 20 are butted together and both side surfaces are bonded with an adhesive to form the E-shaped two-part E-type iron core 10 shown in FIG. An insulating material is used as the adhesive.

As shown in FIG. 4, a coil (secondary coil) 11 is wound around a central leg 10a of an E-shaped iron core 10 to constitute the power receiving device 9. In addition,
If it is difficult to secure the required thickness for the barrier layer 21 by simply bonding the two C-shaped iron cores 21 with an adhesive, the barrier layer 21 is desired by inserting and bonding an insulating resin sheet or the like. It can also be a thickness. The coil 11 is made of an electric wire usually used for a ferrite core (without using a heat-resistant covering material).

Next, the operation of the power receiving device 9 manufactured using the E-shaped iron core 10 will be described. A magnetic circuit having a main magnetic flux in the direction shown by the arrow in FIG. 5 is formed in the E-shaped iron core 10 based on the high-frequency current flowing through the feed line 8, so that the coil 11 has the same frequency as the high-frequency current flowing through the feed line 8. An electric current is induced. At this time, a current induced in the coil 11 forms a magnetic flux in the opposite direction to cancel the main magnetic flux, and the disturbance of the magnetic flux causes both sides of the E-shaped iron core 10 in the longitudinal direction (in a direction orthogonal to the magnetic circuit). both sides)
Then, a leakage magnetic flux φ is generated in a direction parallel to the power supply line 8 (a direction perpendicular to the plane of FIG. 5) (see FIG. 14).

An eddy current is generated in the surface area of the end face of the central leg 10a due to the leakage magnetic flux φ. However, the central leg 1
Since a cut-off layer 21 is formed at 0a to divide it into two so as to pass through its center line, the path of the eddy current is cut off by this cut-off layer 21 as shown in FIG. The eddy current I generated in the leg 10a relatively decreases. That is, the eddy current I flows through each of the divided small regions by dividing the end surface region of the central leg portion 10a where the eddy current can be generated by the blocking layer 21 into two. It hardly occurs, and the amount of current decreases relatively.

As a result, heat generation in the surface area of the end face of the center leg 10a is suppressed to a small level. For this reason, even if a wire used for the coil 11 is not a special wire using a heat-resistant covering material and a normal wire conventionally used for a ferrite core is used, there is a fear of damage due to heat generation due to the leakage magnetic flux φ. There is no.

The E-shaped iron core 10 is a single plate 2 having the same shape.
Since it is configured by only laminating a plurality of sheets 2, one type of punching die for forming the veneer 22 may be prepared, and the cost of the veneer 22 can be reduced.
The manufacturing cost of the E-shaped core 10 is also relatively low.

As described in detail above, according to the present embodiment,
The following effects can be obtained. (A) The central leg 10a of the E-shaped iron core 10 is divided into two parts by a blocking layer 21 passing through the center line thereof, and the path of the eddy current generated in the end face surface area of the central leg 10a due to the leakage magnetic flux φ is blocked. As a result, eddy current is hardly generated, so that heat generation at the end face of the center leg 10a can be suppressed to a small level.

(B) Since the heat generation of the central leg 10a is suppressed to a small level, an electric wire usually used for a ferrite core without using a heat-resistant covering material is used for the coil 11 of the E-type core 10. be able to. Therefore, even if the core is formed of an inexpensive iron core, the electric wire for the coil 11 can be made inexpensive as before, so that the manufacturing cost of the power receiving device 9 can be reduced.

(C) Since the E-shaped iron core 10 is made of a silicon steel plate, chipping or the like, which has conventionally been a problem with ferrite cores, can be reliably prevented. For this reason, a decrease in power supply efficiency due to chipping or the like, which was a problem with the ferrite core, is eliminated, and a constant power supply efficiency can be secured over a long period of time.

(D) Since the E-shaped iron core 10 is formed only by laminating the single plates 22 of one shape (C-shape), only one type of punching die for the single plate 22 is required, and the unit price of the single plate 22 is reduced. be able to. As a result, the manufacturing cost of the E-shaped iron core 10 can be reduced.

(E) Since the manufacturing method of forming the E-shaped iron core 10 by laminating the single plates 22 is employed, for example, the carrier 1
Even if the sizes (lengths) of the E-shaped iron cores 10 to be manufactured are different due to the difference in the models or the like of the E-shaped iron cores 10, the sizes of the E-shaped iron cores 10 having different sizes for each model are changed only by changing the number of stacked layers using the common single plate 22 Can be manufactured. Therefore, when the single plate 22 is used for manufacturing the E-shaped iron cores 10 having different sizes, the manufacturing cost of the E-shaped iron core 10 can be further reduced.

(F) Conventionally, a silicon steel sheet having relatively better magnetic properties than ferrite has not been used due to problems such as heat generation. However, the problem of heat generation has been solved and the E-type core 10 is formed of silicon steel. Therefore, better magnetic characteristics can be obtained as compared with the conventional ferrite core. Therefore, it is possible to contribute to improvement in power conversion efficiency.

(Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIGS. In this embodiment, the veneer constituting the E-shaped iron core has an E shape,
An E-shaped iron core is manufactured only by laminating a single plate in one direction.

As shown in FIG. 7, a plurality of (five in this embodiment) blocking means and a plurality of (in this embodiment, five) cutting means are provided along the center line of the central leg 30a as a coil winding portion of the E-shaped iron core 30 as the iron core. A slit (hole) 31 is formed as a void. The center leg 30a has a slit 31 along its center line.
Although it is intermittent, it is roughly divided into two. The path of the eddy current generated in the central leg 30a due to the leakage magnetic flux φ is intermittently interrupted by the slits 31, so that the eddy current is less likely to be generated, and the heat generation at the end face of the central leg 30a is reduced. It can be suppressed.

The E-shaped iron core 30 is formed by stamping a flat plate of silicon steel into a sectional shape (substantially E-shape) shown in FIG.
It is formed by laminating a plurality of single veneers 32 so as to obtain a predetermined length. In the veneer 32, a slit 31 is formed at a position to be the central leg 30a. Therefore, the E-shaped iron core 30 formed by laminating the single plates 32 is formed.
The slit 31 is formed so as to penetrate in the longitudinal direction thereof, and at least the end face surface area of the central leg 30a in which the eddy current is easily generated is divided into approximately two parts by the slit 31.

FIG. 9 shows an example in which a cut-off means formed of a notch and a slit 33 as a gap are formed in the veneer 32 in place of the slit 31 composed of a hole.
2 of the E-shaped iron core 30 formed by stacking
Each slit (notch) 3 extending from both upper and lower surfaces
3 is almost divided into two. Therefore, the leakage flux φ
As a result, the path of the eddy current generated in the central leg 30a is cut off by each slit 33, so that the central leg 30a
Eddy currents are less likely to be generated in the end surface area of the
The heat generation at the end face a is kept small.

According to this embodiment, the E-shaped iron core 30 can be manufactured only by laminating the single sheets 32 of the same shape in which the slits 31 and the notches 33 are formed. Since the notch 33 can be formed by punching, the number of processing steps for interrupting the path of the eddy current can be reduced. Of course, when the single plate 32 is shared and the parts are shared for the manufacture of the E-shaped cores 30 having different sizes (lengths) due to the difference in the model of the carrier 1 and the like, the manufacturing cost of the E-shaped core 30 is increased. Can be further reduced. In addition, since the means for blocking the path of the eddy current is a gap (air layer), the path of the current can be reliably blocked.

The present invention is not limited to the above embodiment, but may be embodied as follows without departing from the spirit of the invention. (1) In each of the above embodiments, the blocking layer 21, the slit 31, or the notch 33 is formed along the longitudinal direction of the E-shaped iron cores 10, 30, but as shown in FIG. The blocking means may be formed only in the surface layer regions of both end faces of 10a. In FIG. 9, the C-type veneer 22 (for example, the one used in the first embodiment) is required on both sides of the E-type iron core 34 formed by laminating the E-type veneers by the required thickness. An E-shaped iron core 35 of a two-divided type joined at a distance is joined, and slits (notches) 36 for dividing the E-shaped iron core 35 into two at both ends of a central leg 37a are formed.
The mold core 37 is used. Further, the E-shaped iron core 37 having the slits 36 is manufactured by cutting the central leg portion of the E-shaped iron core 34 having a required length to a necessary depth so as to pass through the center line. You can also. Even with this configuration, at least the central leg 37 serving as an eddy current generation area
Since the end face surface area a is divided into two by the slit 36, the eddy current can be suppressed small, and the heat generation at the end face of the central leg 35a can be suppressed small. Also, it was necessary to use an electric wire using a heat-resistant covering material for the coil 11.
The conventional E-shaped iron core can be used because a two-part E-shaped iron core may be added to both end surfaces of the die core or may be cut.

(2) The direction in which the center leg is divided can be changed as appropriate. For example, as in an E-shaped iron core 38 shown in FIG. 10, a slit 39 may be formed to divide the center leg 38a into upper and lower parts. Also with this configuration, since the path of the eddy current is blocked by the slit 39, heat generation at the end surface of the central leg 38a can be suppressed to a small level.

(3) The present invention is not limited to the application of the E-shaped iron core, but can be widely applied to iron cores of other shapes around which a power receiving coil is wound. For example, as shown in FIG. 11, the present invention may be embodied in a C-shaped iron core 40 as an iron core.
FIG. 11A shows an example in which a cut-out portion 41 as a blocking means and a gap portion is formed in the coil winding portion 40a by laminating C-shaped single plates 42 each having a cut-out.
FIG. 11B shows an example in which a C-shaped single plate 44 having holes is laminated to form a slit 45 as a blocking unit and a gap in the coil winding unit 40a.

According to these configurations, the coil winding section 40
Since the path is cut off by the notch 41 and the slit 45 that divide a, the eddy current is less likely to be generated, and the heat generation at the end face of the C-shaped iron core 40 can be reduced. Further, since the C-shaped iron core 40 can be manufactured only by laminating the C-shaped single plates 44 of one shape, the manufacturing cost can be reduced.

(4) The material of the blocking layer is not limited to an insulating material. For example, a high-resistance material that can cut off the path of the eddy current to the extent that the heat generated by the iron core can be suppressed to a small level can be used.

(5) It is also possible to form a cut-off layer and a gap so that the coil winding portion such as the center leg is divided into three or more parts. (6) In the first embodiment, the blocking layer 21 is formed by a material such as an adhesive or a resin sheet interposed between the joining surfaces of the two C-shaped iron cores 20. The gap (gap) provided therebetween can also be used as the blocking means. In this case, the two C-shaped iron cores 20 are arranged and assembled on the support plate with a gap large enough to block the path of the eddy current, and the coil 11 is wound around the center leg 10a. The received power receiving device 9 may be attached to the carrier 1 together with the support plate. With this configuration as well, it is possible to form a gap in the center leg 10a that passes through the center line.

(7) In each of the above embodiments, the blocking means (blocking layer or gap) is formed at the coil winding portion such as the center leg where heat generation is a problem. In the case of an iron core in which heat generation due to eddy current becomes a problem, a blocking means may be formed in a portion where the heat generation needs to be suppressed to a small level.

(8) The iron core is formed by laminating a plurality of single plates, but a gap is formed in a predetermined portion (at least a portion including an eddy current generation region) of the coil winding portion by casting or welding of a steel plate. It is also possible to manufacture an iron core having a portion, or to manufacture two C-shaped iron cores which are butt-joined to interpose a barrier layer by casting or welding a steel plate.

(9) The present invention can be applied to other moving bodies such as automatic guided vehicles and stackers in automatic warehouses. In other words, the present invention can be applied to iron cores attached to all moving bodies employing non-contact power supply. Needless to say, the moving body is not limited to the carrying body that performs the work of carrying the load.

The invention which has been grasped from the above embodiment and is not described in the claims will be described below together with its effects. (A) In the invention described in claim 4 or 5 , the gap or the blocking layer divides the eddy current generation region into a plurality. According to this configuration, the path of the eddy current can be completely (that is, not intermittently) interrupted, and the eddy current can be more effectively prevented from being generated.

(B) In the invention described in claim 5 , the blocking layer is an insulating layer. According to this configuration, since the cutoff layer is an insulating layer, the path of the eddy current can be reliably cut off. (C) In the invention described in claim 5 , the blocking layer is a resin sheet. According to this configuration, it is possible to easily adjust the thickness of the blocking layer necessary for blocking the path of the eddy current.

(D) In claim 6 , a hole or a notch for forming the gap is formed in the veneer. According to this configuration, necessary holes or notches can be formed together at the time of processing (for example, punching) of a veneer, and unnecessary processing for a void can be omitted.

(E) In the invention according to claim 7 , the blocking layer is made of an adhesive for joining the C-shaped iron core. According to this configuration, the barrier layer can be formed only by bonding the C-shaped iron core with the adhesive.

[0057]

As described in detail above, claims 1 and 8
According to the invention described in claim 9 , since the interrupting means is formed in the iron core so as to interrupt the path of the eddy current generated by the leakage magnetic flux from the iron core, the eddy current generated in the iron core is relatively reduced, Heat generation of the iron core due to eddy current can be reduced.

According to the second, eighth and ninth aspects of the present invention,
According to the invention, the blocking means is provided on the central leg of the E-shaped iron core.
To be generated in the central leg due to magnetic flux leakage.
Eddy current path is cut off, reducing heat generation in the center leg.
Can be suppressed. Claim 3 , Claim 8 and Claim
According to the invention described in Item 9 , the interruption means is formed at least at both ends of the coil winding portion around which the power receiving coil is wound in a direction orthogonal to the magnetic circuit formed on the iron core based on the alternating current flowing through the power supply line. As a result, heat generation of the iron core can be effectively reduced.

According to the fourth , eighth and ninth aspects of the present invention, since the cutoff means is a gap, the current path can be reliably cut off and can be easily formed on the iron core. Claim
5, according to the invention described in claim 8 and claim 9, since the blocking means has a blocking layer made of a material having a sufficiently high electrical resistance than the insulating material or core can be cut off the current path.

According to the sixth , eighth and ninth aspects of the present invention, the iron core is formed by laminating a plurality of single plates of the same shape in a direction orthogonal to the magnetic circuit formed on the iron core. Therefore, iron cores having different sizes (lengths) can be manufactured by selecting the number of laminated veneers, and since only one type of veneer needs to be used, the manufacturing cost can be kept relatively low.

According to the seventh , eighth, and ninth aspects of the present invention, two C-shaped iron cores formed by laminating single plates of the same shape are joined in an E-shape to form a joint at the joint. Since the E-shaped core is formed by forming the blocking layer, the E-shaped core having the blocking layer formed on the coil winding portion (center leg) can be manufactured by using only one kind of veneer.

[Brief description of the drawings]

FIG. 1 is a schematic front view of an E-shaped iron core according to a first embodiment.

2A is a perspective view of a single plate, and FIG. 2B is a perspective view of a C-shaped iron core.

FIG. 3 is a perspective view of an E-shaped iron core.

FIG. 4 is a perspective view of a power receiving device.

FIG. 5 is an explanatory view of a magnetic circuit formed on an E-shaped iron core.

FIG. 6 is a front view of the carrier.

FIG. 7 is a schematic front view of an E-shaped iron core according to a second embodiment.

FIG. 8 is a schematic front view of an E-shaped iron core.

FIG. 9 is a perspective view of another example of an E-shaped iron core.

FIG. 10 is a schematic front view of an E-shaped iron core different from FIG. 8;

FIG. 11 is a schematic front view of a C-shaped iron core.

FIG. 12 is an explanatory diagram of a magnetic circuit of an E-shaped iron core according to the related art.

FIG. 13 is a perspective view of the E-shaped iron core.

FIG. 14 is a partial plan view of the E-shaped iron core.

FIG. 15 is a schematic front view of the E-shaped iron core.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Conveying body as a moving body, 2 ... Guide rail, 8 ... Power supply line, 9 ... Power receiving device, 10, 30, 37, 38 ... E-shaped iron core as a core, 10a, 30a, 37a, 38a ... Coil winding Central leg part as part, 11 ... coil as power receiving coil, 20 ... C-shaped iron core, 21 ... shielding layer as shielding means, 22, 32 ... single plate, 31, 33, 36, 39 ... shielding means and gap Slit as a part, 40: C-shaped iron core as an iron core, 40a: coil winding part, 41: cut-out part as cut-off means and gap, 44: C-shaped single plate as single plate, 45 ... cut-off means and Slits as gaps.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-163273 (JP, A) JP-A-3-211708 (JP, A) JP-A-53-99416 (JP, A) JP-A-8- 196003 (JP, A) JP-A-6-40563 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01F 38/14

Claims (9)

(57) [Claims] 1. An iron core mounted on a moving body running on a guide rail and wound with a power receiving coil for obtaining electric power from an alternating current flowing through a power supply line wired to the guide rail by electromagnetic induction. A non-contact power feeding core in a moving body, wherein the iron core is provided with a blocking means for blocking a path of an eddy current generated by a leakage magnetic flux in a direction parallel to the power supply line . 2. The power receiving coil is wound around the core.
An E-shaped iron core having a central leg portion,
2. The non-contact feeding device according to claim 1, wherein the non-contact feeding device is provided on the center leg.
Electric iron core. 3. The switching means according to claim 1 , wherein
Perpendicular to the magnetic circuit formed in the iron core based on the flow
, At least the power receiving coil is wound
The coil winding portion is formed at both ends of the coil winding portion.
Core for non-contact power supply in the moving object. 4. The blocking means is a gap.
Non-contact in the moving body according to claim 3.
Power supply core. 5. The shielding means is an insulating material or the iron core.
A barrier layer made of a material with a sufficiently higher electrical resistance than
The moving body according to any one of claims 1 to 3.
Core for contactless power supply. 6. The iron core, wherein a single plate of the same shape is attached to the iron core.
A plurality of magnetic circuits are stacked in a direction orthogonal to the magnetic circuit to be formed.
6. The semiconductor device according to claim 1, wherein the semiconductor device is formed by:
A non-contact power supply iron core in a moving object according to claim 1. 7. The iron core comprises two laminated single plates.
E-type iron in which a C-type iron core is joined in an E-shape with the above-mentioned barrier layer interposed
7. A non-contact power supply for a moving body according to claim 6, which is a heart.
Iron core. 8. The power receiving coil is mounted on the coil winding section.
The wound as described in any one of claims 1 to 7
A power receiving device comprising the above iron core. 9. A power receiving device according to claim 8,
Moving body.