JPH0956002A - Power feeder pickup - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a power feeder pickup in which a large electromotive force can be induced in a coil. SOLUTION: The power feeder pickup comprises a conductor 5 for conducting a high frequency current laid along the moving path of a mobile, and a yoke 13 projecting 15 to the same side from the opposite ends of a body part 14 fixed to the mobile and applied with a coil 7 and further projecting 16 in the way approaching each other with the end part 17 of projecting part 18 being disposed closely to the conductor 5. Flux is taken into the yoke 13 from the part close to the conductor 5 where the flux density is high and electromotive force is obtained efficiently by increasing the number of turns of the coil 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply pickup device for contactlessly supplying power to a moving body.

[0002]

2. Description of the Related Art A contactless power feeding device (power feeding pickup device) for feeding power to a moving body such as a self-propelled carrier without contact has been conventionally developed as disclosed in, for example, Japanese Patent Laid-Open No. 5-207603. Has been done.

The outline thereof will be explained with reference to FIG. 3. Wheels 3 which are rotationally driven by a motor 2 are attached to a moving body 1 such as a self-propelled carriage, and the floor 3 is guided by a guide (not shown). However, it is designed to travel along a fixed travel route.

On the floor 4 side, a conductor 5 in which copper stranded wire or the like is coated with an insulating material is laid in a groove (not shown) provided along the movement path of the moving body 1, and a high-frequency current is applied to the conductor 5. It can be washed.

On the side of the moving body 1, there is provided a pickup 8 in which a coil 7 is wound around a rectangular parallelepiped-shaped yoke 6 as shown in FIG. 4, and the center line of the yoke 6 in the front-rear direction is located above the conductor 5. It is arranged so as to be positioned so that an alternating electromotive force is generated in the coil 7 by the magnetic field generated by the high frequency current flowing in the conductor 5.

As shown in FIG. 3, a converter 9 for converting an AC electromotive force generated in the coil 7 into a predetermined DC voltage is provided in the moving body 1 and rotates the motor 2 via the controller 10. It is like this.

[0007]

As shown in FIG. 5, the magnetic flux 11 of the magnetic field generated by the high-frequency current flowing through the linear conductor 5 is concentric with the conductor 5 as the center, and the portion near the center is dense and It gradually becomes sparse as it gets closer.

If as much of this magnetic flux 11 as possible is taken into the yoke 6, the electromotive force generated in the coil 7 becomes large and the electric power can be efficiently supplied to the moving body 1. However, as shown in FIG. When the conductor 5 that generates a magnetic field is embedded in the floor surface 4, it is impossible to increase the interlinkage magnetic flux by closing the magnetic path by the yoke 6 in a positional manner with respect to the generated magnetic field.

In order to increase the interlinkage magnetic flux for the coil 7 in the case of FIG. 6, there is a method of increasing the number of turns of the coil 7.

As a method therefor, if the yoke 6 is extended in the left-right direction in FIG.
Both ends of the wire are separated from the conductor 5 and can be taken into the yoke 6 only at a place where the magnetic flux density is low, and the electromotive force is not so improved.

Even if the number of winding layers of the coil 7 is increased, the yoke 6 is positioned above and separated from the conductor 5, so that only the portion having a low magnetic flux density can be taken in.

Therefore, as shown in FIG. 7, the yoke 6 is formed into a shape having projecting portions 12 from both ends toward the floor surface 4,
When both ends of the yoke 6 are brought close to the conductor 5 so that the portion of the magnetic flux 11 having a high magnetic flux density is taken into the yoke 6, the portion around which the coil 7 is wound is shortened and the electromotive force generated in the coil 7 is also increased. I can't.

An object of the present invention is to solve the above-mentioned conventional problems and to provide a power feeding pickup device capable of generating a large electromotive force in a coil.

[0014]

In order to achieve the above object, the present invention provides a conductor which is laid along a moving path of a moving body and through which a high frequency current is conducted, and a conductor which is attached to the moving body so as to face the conductor. In a power feeding pickup device having a curved yoke and a coil wound around the yoke, a protruding portion protruding from both ends of a main body portion around which the coil is wound toward the side of the conductor and further bent in a direction in which the conductor is close to each other. Is provided on the yoke.

In the power feeding pickup device of the present invention, even if the body portion of the yoke around which the coil is wound is lengthened to increase the number of turns of the coil, the protruding portions protruding from the both ends of the body portion to the sides of the conductor, respectively. Since the front end portions of the are bent so as to approach each other and are arranged close to the conductor, it is possible to take in a magnetic flux portion having a high density near the conductor into the yoke.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view showing an example of an embodiment of a power feeding pickup device of the present invention, in which a yoke 13 made of a ferromagnetic material, which constitutes the power feeding pickup device, is
From both ends of the main body portion 14 around which the coil 7 is wound, projecting 15 toward the same side toward the floor surface 4 and refracting 16 in a direction closer to each other, the tip end 17 of the refracted portion 16 approaches the conductor 5. The projecting portions 18 having a shape arranged as described above are integrally formed at both ends of the main body portion 14.

Therefore, the tip portion 17 of the bent portion 16 of the projecting portion 18 can be arranged so as to be extremely close to the conductor 5, and as shown in FIG. The magnetic flux 11 can be taken into the yoke 13 and the length of the main body portion 14 around which the coil 7 is wound does not become short. Therefore, the number of turns of the coil 7 can be increased to efficiently obtain a high electromotive force.

The power feeding pickup device of the present invention is not limited to the above-mentioned embodiment, and various modifications can be made without departing from the scope of the present invention.

[0020]

As described above, in the power feeding pickup device of the present invention, since the number of turns of the coil can be increased and the magnetic flux of the high density portion can be taken in the yoke, a high electromotive force can be efficiently obtained. It has an excellent effect of being able to.

[Brief description of drawings]

FIG. 1 is a front view showing an example of an embodiment of a power feeding pickup device of the present invention.

FIG. 2 is a front view showing a relationship between a yoke and magnetic flux in the power feeding pickup device of the present invention.

FIG. 3 is a side view of a moving body including a contactless power feeding device.

FIG. 4 is a perspective view of a yoke of a conventional contactless power feeder.

FIG. 5 is a front view showing a state of magnetic flux generated by a current flowing through a conductor.

FIG. 6 is a front view of a yoke of a conventional contactless power feeder.

FIG. 7 is a front view showing a relationship between a magnetic flux and a yoke having protruding portions at both ends.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Moving body 5 Conductor 7 Coil 13 Yoke 14 Main body part 15 Projection 16 Refraction 18 Projection part

Claims (1)

[Claims] 1. A conductor, which is laid along a moving path of a moving body and through which a high-frequency current is passed, a yoke attached to the moving body so as to face the conductor, and a coil wound around the yoke. In the power feeding pickup device, the yoke is provided with projecting portions projecting laterally of the conductor from both ends of the main body portion around which the coil is wound and further refracting in a direction approaching each other. .