JP3482772B2 - Pickup coil unit for non-contact power supply - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pickup coil unit of a non-contact type power feeding device.

[0002]

2. Description of the Related Art Conventionally, a transport system for transporting a load by means of a moving body that moves along a guide rail has been proposed and implemented to improve the efficiency of physical distribution in a factory or a warehouse. Generally, a traveling motor is used for traveling of a moving body. Then, the drive power of the traveling motor is supplied through a power supply line (power trolley wire) laid on the guide rail in which an alternating current of 200 V flows.

This power feeding method includes a trolley type and a non-contact type. The trolley method is a method of supplying electric power by bringing a current collector provided on the moving body side into contact with a power supply line. The non-contact method is a method in which a pickup coil provided on the moving body side is arranged in the vicinity of a power supply line and an induced electromotive force is generated in the pickup coil to obtain electric power. While the trolley type has problems such as the necessity of maintenance due to wear of the current collector and the generation of dust and sparks, the non-contact type does not have such problems. Therefore, in this respect, the non-contact method is superior to the trolley method in recent years, and thus has attracted attention.

Generally, a pickup coil used in this type of non-contact method is wound around a ferrite core. Forming a core from a ferrite block by cutting increases the processing cost. Therefore, plate materials are joined and wound around a core formed to have a predetermined length and a predetermined cross-sectional shape. For example, in Japanese Unexamined Patent Publication No. 6-31163, as shown in FIG. 9, a plurality of resin blocks 51 each having an E-shaped cross section are arranged in the U-shaped frame 52 in a state of being aligned in a direction perpendicular to the paper surface (see FIG. Fix with (not shown), block 5
A gap member 53 is interposed between the end face of No. 1 and the U-shaped frame 52. Then, each recess 51a of the block 51
Of the block 51, the ferrite plate 54a is arranged at the bottom of the concave portion 51a, the ferrite plate 54b is arranged at the side surface of each concave portion 51a, and the ferrite plate 54c is arranged at the tip of the convex portion 51b of the block 51 so as to extend in the direction perpendicular to the paper surface.
It is fixed at 1. Further, a litz wire having 10 to 20 turns is wound around the pair of ferrite plates 54b fixed to both side surfaces of the central convex portion 51b to form a pickup coil 55. The open side of the U-shaped frame 52 is covered with a resin cover 56.

Further, in Japanese Unexamined Patent Publication No. 6-153305, as shown in FIGS. 10 and 11, five ferrites 57 having an E-shaped cross section are arranged, and a central convex portion 5 of each ferrite 57 is arranged.
There is disclosed a core in which a ferrite plate 58 is placed on 7a, and each ferrite 57 is fixed together with the ferrite plate 58 to a base body 60 via a plate 59 made of a non-magnetic material with screws 61 at predetermined intervals. The ferrites 57 are arranged with a gap between each other and are arranged on the outside of the core by 10 to 20.
The litz wire of the turn is wound and the pickup coil 62
Are formed. Then, the base body 60 is attached to the moving body via a mounting member 63 fixed to the outer surface of the base body 60.

[0006]

The induced electromotive force generated in the pickup coil varies depending on the length of the core if the number of turns of the pickup coil and the current flowing through the feeder line are the same, and the power required on the load side, That is, cores having different lengths are required depending on the power feeding capacity of the pickup coil unit. The core disclosed in Japanese Unexamined Patent Publication No. 6-31163 is formed in a predetermined shape with a predetermined length by joining a plurality of ferrite plates 54a to 54c to each other via a resin block 51 and screws. Therefore, when cores of different lengths are required, it is necessary to prepare ferrite plates 54a to 54c of different lengths corresponding to the cores, which requires many types of molds to be manufactured and the ferrite plates 54a to 54c.
The manufacturing cost of 54c becomes high. Further, when manufacturing a ferrite plate having a large shape, the manufacturing cost becomes higher. As a result, the manufacturing cost of the pickup coil unit also increases. Further, since the magnetic flux passing through the ferrite plates 54a to 54c passes through the joints of the respective ferrite plates 54a to 54c, a part of the magnetic flux leaks and the characteristics are inferior to those of the integrated ferrite core.

On the other hand, Japanese Patent Laid-Open No. 6-153305 does not disclose that the power feeding capacity of the pickup coil unit can be changed by changing the number of ferrites 57, but the ferrite 57 fixed to the base body 60 is not disclosed. It is possible to change the power supply capacity of the pickup coil unit by increasing or decreasing the number. Therefore, the power feeding capacity of the pickup coil unit can be changed by increasing or decreasing the number of ferrites 57 of the same shape, and only one type of die for manufacturing the ferrite 57 is required. However, the plate 59 and the base body 6
It is necessary to prepare 0 having a length corresponding to the increase and decrease in the number of ferrites 57. Further, since the ferrites 57 are arranged with a gap left between them, it is necessary to fix each ferrite 57 with the screw 61 via the ferrite plate 58, and there is a problem that assembly is troublesome.

The present invention has been made in view of the above conventional problems, and an object thereof is to provide a pickup coil unit of a non-contact type power feeding device which is easy to assemble and whose feeding capacity of the pickup coil unit can be easily changed. To do.

[0009]

In order to achieve the object According to an aspect of, the invention according to claim 1, in pick-up coil unit for generating an induced electromotive force based on the current supplied to the feeder, the pick-up coils a core being wound, that assembled <br/> in a state where the cross-sectional shape are joined to the same plurality of core pieces to one another in a plane perpendicular to the feed line when arranged in a predetermined position relative to the pickup coil unit the feed line Located at both ends of the core pieces together with
Non-contact power supply device with a core piece fixed to a mounting member
The pickup coil unit of
The positioning part is formed on the joint surface with other core pieces
I made it .

According to a second aspect of the present invention, the number of joints of the core pieces is selected according to the power feeding capacity of the pickup coil unit. According to a third aspect of the present invention, in the first or second aspect of the invention, the core piece is formed by molding ferrite powder into a predetermined shape with a mold and then firing.

According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the core piece is formed so that the cross-sectional shape is substantially E-shaped and a central protrusion thereof is formed. A pickup coil is wound around the section.

According to a fifth aspect of the invention, the power supply line is supplied.
That generates an induced electromotive force based on the generated current
The pickup coil is wound in the top coil unit.
The pickup coil unit supplies the core to be rotated.
It should be orthogonal to the feeder line when it is placed in place with respect to the wire.
Multiple core pieces with the same cross-sectional shape
Of the non-contact type power supply device assembled in the assembled state
A coil unit, forming a positioning portion at the interface between the other core pieces definitive in the core piece, said positioning
The female part is composed of a positioning recess and a positioning protrusion.
I did .

The pickup coil unit of the invention described in any one of claims 1 to 5 is used by being mounted on a moving body that moves along a guide rail, for example, so as to be located in the vicinity of a power supply line. Then, when an alternating current flows through the power supply line, an induced electromotive force is generated in the pickup coil based on the magnetic flux generated around the power supply line, and the pickup coil is used as a power source of the moving body. Since the core around which the pickup coil is wound is formed by assembling multiple core pieces with the same cross-sectional shape, the cores with different sizes (lengths) can be easily combined by changing the number of core pieces with the same shape. It is formed. Since each core piece is in a state of being joined to each other,
When the mounting member is used, the core pieces located at both ends are fixed with screws or the like to fix the entire core piece to the mounting member.

According to the second aspect of the present invention, the number of core pieces to be joined is changed according to the power feeding capacity of the pickup coil unit. When the number of core pieces is increased, the power feeding capacity of the pickup coil unit is increased, and when the number of core pieces is reduced, the power feeding capacity of the pickup coil unit is decreased.

According to the third aspect of the present invention, the core piece is formed by molding ferrite powder into a predetermined shape with a mold and then firing it. According to the invention described in claim 4, in the pickup coil unit, the pickup coil is wound around the central protruding portion of the core having a substantially E-shaped cross section. Therefore, for example, when the power feeding line is used in the recesses located on both sides of the central protrusion, the magnetic flux generated from the power feeding line efficiently passes through the core.

According to the first and fifth aspects of the present invention, the core pieces are joined to each other in a state of being positioned via a positioning portion formed on a joint surface with another core piece. Therefore, the plurality of core pieces are accurately joined.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment in which the present invention is embodied in an unmanned transportation system in which a transportation vehicle as a moving body travels on a guide rail installed on a ceiling will be described with reference to FIGS. .

As shown in FIG. 3, a carrier 1 for carrying a load has a guide rail 2 which is erected on the ceiling and has a substantially U-shaped cross section.
A plurality of stations (not shown) provided along the guide rail 2 are provided so as to be capable of traveling along the rails to transfer the load. The carrier vehicle 1 includes a drive wheel 3 and a driven wheel (not shown) rolling on the guide rail 2, and a guide wheel 4a for sandwiching the guide protrusion 2a of the guide rail 2,
4b, and is supported by the guide rail 2 in a suspended state. The support structure of the drive wheel 3, the driven wheel and the guide wheels 4a and 4b has been previously proposed by the applicant of the present application (Japanese Patent Laid-Open No. 8-727).
09). A traveling motor 5 composed of a three-phase induction motor is mounted on the transport carriage 1, and drive wheels 3 are driven by the driving of the travel motor 5 so that the transport carriage 1 travels along a guide rail 2.

On the side surface of the guide rail 2, feed lines 6a and 6b made of litz wire are provided via a pair of upper and lower support arms 7 arranged on the side opposite to the surface of the guide rail 2 facing the drive wheel 3. They are arranged in parallel vertically. Power supply lines 6a, 6b
5 is a reciprocating line as shown in FIG. 5, in which the feeder line 6a arranged on the upper side is the outward route and the feeder line 6b arranged on the lower side.
Is the return trip. The start ends and the end ends of the power supply lines 6a and 6b are connected to a power supply device 8 installed on the ground. Then, the power supply device 8 supplies AC power to the power supply lines 6a and 6b. In this embodiment, the AC power supply supplied from the power supply device 8 is a power supply having a high frequency sine waveform of 200 V and 10 kHz.

As shown in FIG. 3, a pair of front and rear pickup coil units 9 are arranged on the carrier truck 1 so as to face the power supply lines 6a and 6b. Each pickup coil unit 9 is mounted on a support bracket 10 provided in the main body of the carriage for supporting the drive wheels 3 and the driven wheels via mounting members 11 made of a non-magnetic material (synthetic resin in this embodiment). It is supported. The pickup coil unit 9 has an upper feed line 6a (outward path) between the upper protrusion 9a and the central protrusion 9b, and the central protrusion 9b and the lower protrusion 9b.
It is supported by the support bracket 10 so that the lower power supply line 6b (return path) may pass between c and c.

As shown in FIG. 1, in the pickup coil unit 9, the pickup coil unit 9 has a power feed line 6.
The power supply line 6 when arranged at a predetermined position with respect to a and 6b
a core 12 having a substantially E-shaped cross section on a plane orthogonal to a and 6b, and a pickup coil 13 wound around the core 12
It consists of and. The pickup coil 13 is wound around the central protrusion 12a of the core 12.

The core 12 is assembled by being joined and fixed via an adhesive in a state where the E-shaped surfaces of the plurality of core pieces 14 are in contact with each other. The number of joints of the core pieces 14 and the number of turns of the pickup coil 13 are selected according to the power feeding capacity of the pickup coil unit 9.

A positioning portion is formed on the core piece 14 at the joint surface (contact surface) with another core piece 14. As shown in FIG. 1, a cylindrical positioning protrusion 14a is formed on the first surface as a positioning portion. As shown in FIG. 2, a positioning recess 14b having a shape corresponding to the positioning protrusion 14a is formed on the second surface. Then, the positioning protrusion 14a and the positioning recess 14b are fitted to each other so that the core pieces 14 can be joined in a state of being accurately positioned.

The core piece 14 is formed by molding ferrite powder into a predetermined shape with a mold and then firing it. The positioning protrusion 14a and the positioning recess 14b are formed during this molding. Further, the peripheral surfaces of the positioning protrusion 14a and the positioning recess 14b are formed in a slightly tapered shape so as to facilitate the die cutting.

FIG. 5 shows an electric circuit of the power supply device 8 mounted on the carrier vehicle 1 and the ground-side power supply device 8 for supplying high frequency power to the power supply lines 6a and 6b. The power supply unit 8 on the ground side is AC
The DC / DC conversion circuit 16 is provided, and the AC / DC conversion circuit 16 converts a 200V, 60-hertz three-phase AC power supply 17 into a 200V DC power supply. The DC power source converted by the AC / DC conversion circuit 16 is supplied to the DC / AC conversion circuit 18.

The DC / AC conversion circuit 18 is composed of a first drive circuit section 18a and a second drive circuit section 18b. Both drive circuit units 18a and 18b are connected to the AC / DC conversion circuit 16 in parallel with each other. The output terminal of the first drive circuit section 18a is connected to the starting ends of the power supply lines 6a and 6b via a resonance capacitor 19. The output terminal of the second drive circuit section 18b is
It is connected to the ends of the power supply lines 6a and 6b.

The first drive circuit portion 18a includes two upper transistors T1 and T2 and two lower transistors T3 and T3.
4 and the collectors of the upper transistors T1 and T2 are connected to the positive pole side of the AC / DC conversion circuit 16, and the emitters of the lower transistors T3 and T4 are connected to the negative pole side of the AC / DC conversion circuit 16. . The emitters of the upper transistors T1 and T2 and the lower transistor T
The connection point between the collectors of T3 and T4 is the first drive circuit section 18
It becomes the output terminal of a.

The second drive circuit section 18b includes two upper transistors T5 and T6 and two lower transistors T7 and T7.
8 and the collectors of the upper transistors T5 and T6 are connected to the positive pole side of the AC / DC conversion circuit 16, and the emitters of the lower transistors T7 and T8 are connected to the negative pole side of the AC / DC conversion circuit 16. . The emitters of the upper transistors T5 and T6 and the lower transistor T
The connection point between the collectors of 7 and T8 is the second drive circuit section 18
It becomes the output terminal of b.

Then, each of the transistors T1 to T8 is controlled to be turned on / off by a controller (not shown), and power of 200 V and 10 kHz having a high frequency sine waveform is supplied to the feeder lines 6a and 6b. Incidentally, the upper transistors T1 and T2 of the first drive circuit section 18a and the lower transistors T7 and T8 of the second drive circuit section 18b are on / off controlled synchronously, and the first drive circuit section 18a of the first drive circuit section 18a is controlled. The lower transistors T3 and T4 and the upper transistors T5 and T6 of the second drive circuit section 18b are on / off controlled in synchronization. When the upper transistors T1 and T2 and the lower transistors T7 and T8 are on, the lower transistors T3 and T4 are
And the upper transistors T5 and T6 are turned off, and conversely,
The upper transistors T1 and T2 and the lower transistors T7,
When T8 is off, the lower transistors T3 and T4 and the upper transistors T5 and T6 are controlled to be on.

The power supply device 15 mounted on the carrier 1 is provided with a rectifier circuit 20, and the rectifier circuit 20 is connected at its input terminal to a series circuit of a pickup coil 13 and an output adjusting capacitor 21. The output terminal of the rectifier circuit 20 is connected to the traveling motor 5 via an inverter 22. A smoothing capacitor 23 is connected between the rectifier circuit 20 and the inverter 22. The inverter 22 is controlled by a command from a control device (not shown) mounted on the carrier vehicle 1, and the frequency-converted three-phase AC power supply is used for the traveling motor 5.
To be supplied to. The control device controls the traveling and stopping of the carrier vehicle 1 based on a command from an operation control device (not shown).

Next, the operation of the device configured as described above will be described. A control signal is output from the control device to the inverter 22 based on a command from an operation control device (not shown). Then, the traveling motor 5 is drive-controlled via the inverter 22, and the carrier 1 moves along the guide rail 2 to carry the load between the predetermined stations.

Power supply devices 8 to 20 are connected to the power supply lines 6a and 6b.
Power of high frequency sinusoidal waveform of 0 V and 10 kHz is supplied. Then, a magnetic flux is generated around each of the power supply lines 6a and 6b, and an induced electromotive force is generated in the pickup coil 13 arranged close to each of the power supply lines 6a and 6b. The induced electromotive force generated in the pickup coil 13 is converted into direct current by the rectifier circuit 20, smoothed by the smoothing capacitor 23, and output to the inverter 22. And the inverter 22
The three-phase AC power source whose voltage and frequency have been converted by is supplied to the traveling motor 5.

That is, by the power supply lines 6a and 6b (primary coil) arranged along the guide rail 2 and the pickup coil 13 (secondary coil) wound around the core 12 mounted on the carrier truck 1, Electric power is supplied to the carrier 1 without contact. From the pickup coil 13, an electromotive force having a voltage proportional to the primary current and the inductance of the secondary coil is obtained.

As shown in FIG. 4, the directions of the currents flowing through the two feeders 6a and 6b arranged so as to sandwich the central projection 9b of the pickup coil unit 9 are opposite to each other, and the feeders 6a and 6b are opposite to each other. The directions of the magnetic fluxes S generated around the are opposite to each other as indicated by the arrow. However, since the wound central protrusion 9b of the pickup coil 13 is located between the two feeders 6a, 6b, both the feeders 6a, 6b.
Direction of the magnetic flux S generated from the center projection 9b is the same, and the pickup coil 13 has the feed lines 6a, 6
The induced electromotive force is efficiently generated by the change in the magnetic flux generated from b.

The inductance of the secondary coil is proportional to the length of the core 12, that is, the number of core pieces 14 joined to form the core 12. Therefore, assuming that the inductance of one core piece 14 is L0, n is n
It becomes L0, and the inductance can be easily changed depending on the number of joints.

If a large output current is required, it is necessary to use a wire having a large diameter as the element wire of the pickup coil 13. When the number of turns is increased by using a wire having a large diameter, the cross-sectional area of the pickup coil 13 becomes large,
The distance between the pickup coil 13 and the upper protrusion 9a and the lower protrusion 9c of the pickup coil unit 9 becomes narrow. Therefore, it becomes difficult to dispose the power supply lines 6a and 6b at predetermined positions without changing the size of each core piece 14. However, the output voltage of the secondary coil (pickup coil unit 9) is not a function of only the number of core pieces 14,
It is also a function of the number of turns of the pickup coil 13.
Therefore, a secondary coil having the same output voltage can be obtained by reducing the number of turns and increasing the number of core pieces 14. Since the output voltage of the secondary coil is also proportional to the number of turns of the pickup coil 13, if the inductance value when the number of core pieces 14 is one is known, the output voltage of the pickup coil unit 9 is determined by the number of joints of the core pieces 14 and the number of turns. Can be calculated, and the pickup coil unit 9 can be easily designed.

This embodiment has the following effects. (A) Core 12 around which the pickup coil 13 is wound
Is formed by assembling a plurality of core pieces 14 having the same cross-sectional shape and assembling them, so that the cores 12 having different sizes (lengths) can be easily formed by changing the number of core pieces 14 having the same shape to be joined. When the number of core pieces 14 is increased, the power feeding capacity of the pickup coil unit 9 is increased, and when the number of core pieces 14 is reduced, the power feeding capacity of the pickup coil unit 9 is decreased. Therefore, it becomes easy to manufacture the pickup coil units 9 having different power supply capacities and sizes, and it becomes easy to apply them to various models.

(B) The feed capacity of the pickup coil unit 9 is changed by changing both the number of joints of the core piece 14 and the number of turns of the pickup coil 13 to increase the cross-sectional area of the pickup coil wound around the core 12. Without using a large diameter wire. As a result, even if the current value used in the load is large, it is possible to cope with the core piece 14 without changing the shape thereof.

(C) Each core piece 14 is joined to each other in a state of being positioned via a positioning protrusion 14a and a positioning recess 14b formed on the joint surface with another core piece 14. Therefore, the plurality of core pieces 14 can be accurately joined.

(D) In the pickup coil unit 9, the pickup coil 13 is wound around the central protruding portion 12a of the core 12 having a substantially E-shaped cross section, and the feeder lines 6a and 6b arranged so as to sandwich the pickup coil 13 therebetween. It is used in the state where currents flow in opposite directions. Therefore, the magnetic flux S generated from the power supply lines 6a and 6b efficiently passes through the core 12, and the magnetic flux S generated from both power supply lines 6a and 6b has the same direction when passing through the pickup coil 13. Therefore, the induced electromotive force is efficiently generated by the magnetic flux S interlinking with the pickup coil 13.

(E) The core 12 has a plurality of core pieces 14
However, since the magnetic flux flows in a plane parallel to the joint surface of each core piece 14, there may be some gaps between the core pieces 14 or an adhesive layer. However, since there is no flow of magnetic flux in the direction crossing the gap or the adhesive layer, it is possible to obtain the same characteristics as a core of an integrated product formed by cutting from a ferrite block.

(F) Since the core piece 14 is not so thick, it can be formed by molding ferrite powder into a predetermined shape with a mold and then firing it. Therefore, even if the step of assembling the plurality of core pieces 14 to form the core 12 is included, the yield is improved and the manufacturing cost is reduced as compared with the case where the core is formed by cutting from the ferrite block. In addition, the manufacturing cost is lower than in the case where ferrite plates having different lengths are prepared and cores having different lengths are formed.

(G) Since the plurality of core pieces 14 are bonded to each other by the adhesive material, the winding work of the pickup coil 13 can be performed without being mounted on the mounting member 11.

The present invention is not limited to the above embodiment, but may be embodied as follows, for example. (1) Instead of the shape of the core piece 14 of the above-described embodiment, for example, as shown in FIG. 6A, the central protrusion is a straight line having the same width from the base end to the tip as the protrusions on both sides. The protrusions 14c are formed at both ends of the connecting portion located on the base end side of each protrusion. Further, the positioning portion is omitted. In this case, the core pieces 14 are joined by an adhesive, and the pickup coil 13 is divided and wound around the connecting portions located on both sides of the central convex portion. Pickup coil 1
The total number of turns of 3 is twice that of the above-mentioned embodiment when the power supply capacity is the same. In this case, the divided pickup coil 13 has a feed line 6a which is a forward path of the supply current.
And one of the magnetic fluxes S generated from the power supply line 6b serving as the return path interlinks. Then, the total amount of magnetic flux interlinking with both pickup coils 13 becomes equal to that in the above-described embodiment. Therefore, the induced electromotive force generated in the pickup coil unit 9 is also the same.

In the case of this example, the central protrusion 12a of the core 12
Feed lines 6a and 6b are arranged between the upper projection 9a and the lower projection 9c of the pickup coil unit 9. Therefore, unlike the case of the above-described embodiment, it is not necessary to secure the winding allowance of the pickup coil 13, and the height H of the core 12 can be reduced. In addition, the core piece 1 is attached to the mounting member 11.
A holding portion 11 for holding the protruding portions 14c protruding from both ends of
By forming a, the pickup coil unit 9 can be easily attached to the support bracket 10 via the attachment member 11.

(2) As shown in FIG. 6B, the core piece 14 is used as a positioning portion formed on the core piece 14.
A plurality of holes 14d extending in the thickness direction are formed. When joining a plurality of core pieces 14, a rod is inserted in hole 14d, and core piece 14 which applied an adhesive is moved along a rod and joined. Then, after the bonding of the core pieces 14 is completed, the rod is removed.

Further, as shown in FIG. 7, instead of a rod, a bolt 24 is inserted so as to pass through each hole 14d of a predetermined number of core pieces 14, and a nut 25 is screwed into the tip thereof to tighten the core piece 14. You may fix it. In this case, no adhesive is needed.

(3) The positioning protrusion 14a and the positioning recess 14b may be formed on both surfaces of the core piece 14, respectively. (4) When the positioning portions that engage with each other in a concave-convex relationship are provided as in the embodiment and (3), the core pieces 14 located at both ends of the core pieces 14 with the predetermined number of core pieces 14 assembled are screwed or the like. By fixing to the mounting member 11, the entire core piece 14 is fixed to the mounting member 11. Therefore, it is not necessary to use as many screws as the number of core pieces 14, and the labor for fixing to the mounting member 11 is simplified.

(5) The power supply line may be one, or the core piece 14 may have a shape other than the E-shaped cross section, for example, a C-shape as shown in FIG. (6) Instead of the unmanned carrier system that uses the carrier truck 1 that travels on the guide rail 2 that is installed on the ceiling, an unmanned carrier system that uses a carrier truck that travels on the guide rail that is laid on the ground, and a stacker for an automated warehouse. May be applied to cranes.

(7) Instead of folding one electric wire and arranging the forward and return power supply lines 6a and 6b in parallel with each other in a state of being close to each other, two power supply lines are based on the current flowing through them. The generated magnetic fluxes are arranged at intervals so that they do not interfere with each other, and currents are made to flow in the same direction.
Further, the pickup coil 13 is arranged on the carriage 1 so that it can pass through a position where a magnetic flux generated around one of the power supply lines passes.

(8) The output of the power supply unit 8 on the ground side is set to 20.
Other than 0 V and 10 kHz may be used. (9) Instead of providing a pair of front and rear pickup coil units 9 on the carriage 1, only one pickup coil unit 9 or three or more pickup coil units 9 and the pickup coils 13 wound around each pickup coil unit 9 are connected in series. Good.

(10) The material of the core piece 14 may be a material other than ferrite. Inventions other than those described in the claims that can be grasped from the embodiment and the modifications will be described below together with their effects.

[0053] (1) position-decided Me portion is constituted by the combination of the positioning protrusion and the positioning recess. in this case,
Since the core pieces are joined to each other by the engagement of the positioning portions without the auxiliary member, by fixing the core pieces located at both ends with a predetermined number of core pieces assembled to the mounting member, the entire core piece is It is fixed to the mounting member. Therefore, it is not necessary to use screws as many as the number of core pieces, and the labor for fixing to the mounting member becomes simple.

[0054] (2) position-decided Me portion are a plurality of holes formed so as to extend in the thickness direction of the core pieces. In this case, each core piece can be easily positioned by inserting an auxiliary member such as a rod into the hole.

[0055] (3) before SL core is formed in a cross-section substantially E-shaped, the pickup coil is wound around the connecting portions located on opposite sides of the center projection. In this case, unlike the case where the pickup coil is wound around the central protrusion, it is not necessary to secure a winding margin for the pickup coil, and the height of the core can be reduced.

[0056]

As described in detail above, the first to fifth aspects of the invention are described.
In the invention described in (1), the assembling is easy and the power supply capacity of the pickup coil unit can be easily changed.

According to the second aspect of the present invention, the feed capacity of the pickup coil unit can be easily changed by changing the number of core pieces to be joined. In the invention according to claim 3, the ferrite powder is formed into a predetermined shape by a mold and then fired to be formed. Therefore, even if the step of assembling a plurality of core pieces to form a core is included, cutting work is performed from the ferrite block. As a result, the yield is improved and the manufacturing cost is reduced as compared with the case where the core is formed.

According to the fourth aspect of the present invention, for example, when the power feeding line is used in the recesses located on both sides of the central protrusion, the magnetic flux generated from the power feeding line efficiently passes through the core. Then, when used in a state where currents flow in opposite directions in each power supply line, induced electromotive force is efficiently generated by the magnetic flux generated from both power supply lines.

According to the first and fifth aspects of the present invention, each core piece is joined to each other in a state of being positioned through a positioning portion formed on a joint surface with another core piece, and the plurality of core pieces are accurately joined together. Can be joined well.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a pickup coil unit.

FIG. 2 is a perspective view of a core piece.

FIG. 3 is a front view of a carrier truck.

FIG. 4 is a schematic diagram showing an operation.

FIG. 5 is a circuit diagram showing a configuration of a power supply device.

FIG. 6A is a schematic side view of a pickup coil unit of a modified example, and FIG. 6B is a perspective view of a core piece of another modified example.

FIG. 7 is a front view of a pickup coil unit according to another modification.

FIG. 8 is a side view of a core piece according to another modification.

FIG. 9 is a cross-sectional view showing a conventional device.

FIG. 10 is a front view showing another conventional device.

FIG. 11 is a side view of the same.

[Explanation of symbols]

6a, 6b ... Feed line, 9 ... Pickup coil unit, 12 ... Core, 13 ... Pickup coil, 14 ...
Core pieces, 14a ... Positioning projections as positioning parts, 14b ... Positioning recesses as positioning parts.

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Claims (5)

(57) [Claims] 1. A pick-up coil unit odor to generate an induced electromotive force based on the current supplied to the feeder
And assemble the core around which the pickup coil is wound in such a state that a plurality of core pieces having the same cross-sectional shape in a plane orthogonal to the power supply line when the pickup coil unit is arranged at a predetermined position with respect to the power supply line are joined to each other. Along with
Attach core pieces located at both ends of the plurality of core pieces
A pickup coil unit of a non-contact type power supply device fixed to an armature member, the other core in the core piece
Non-contact type power supply with positioning part formed on the joint surface with the piece
Device pickup coil unit . 2. The pickup coil unit of the non-contact type power feeding device according to claim 1, wherein the number of core pieces to be joined is selected according to the power feeding capacity of the pickup coil unit. 3. The pickup coil unit of the non-contact power feeding device according to claim 1, wherein the core piece is formed by molding ferrite powder into a predetermined shape with a mold and then firing the ferrite powder. 4. The core piece has a cross-sectional shape of substantially E.
The pickup coil unit of the non-contact type power feeding device according to claim 1, wherein the pickup coil is formed in a letter shape, and a pickup coil is wound around a central protrusion thereof. 5. Induction based on the current supplied to the power supply line
Pickup coil unit that produces electromotive force
Pick up the core around which the pickup coil is wound.
The coil unit is placed at a predetermined position with respect to the power supply line.
If the cross-sectional shape is
Non-contact type with core pieces joined together
A pick-up coil unit of the power supply apparatus, a positioning portion is formed at the interface between the other core pieces definitive in the core piece, positioning the positioning recess the positioning unit
A pickup coil unit for a non-contact power feeding device that is configured by combining convex portions .