JP2013030688A - Coil and manufacturing method of coil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coil capable of attaining windings of a plurality of turns easily for large sized coils having a long form outer shape (containing rectangle, ellipse, and oval) in plane view, and to provide a manufacturing method of the coil.SOLUTION: A coil 10 using a wire bundle with a plurality of insulation wires 12 to 18 is arranged so that lead wires 12a to 17a of each of the insulation wires 12 to 18 exposed from both ends of the wire bundle 11 are connected to lead wires 13b to 18b other than the own wires and then the insulation wires 12 to 18 are connected in series. In particular, the coil is superior in non-contact charging to one or more vehicles.

Description

The present invention relates to a coil and a method of manufacturing the same that are used when electric power is transmitted to a vehicle or other vehicle using a battery such as an automobile in a contactless manner.

For example, Patent Document 1 discloses a device that connects a high-frequency power source to a primary coil, arranges a secondary coil in an automobile, supplies electric power from the primary coil to the secondary coil by electromagnetic induction, and charges an automobile battery or the like. Is disclosed.

Further, Patent Document 2 discloses a high-frequency electric wire (Litz wire) formed by bundling a plurality of strands covered with an insulating film and winding them together and enclosing them with an outer sheath. And it is proposed to produce the primary coil arrange | positioned at the floor side and the secondary coil arrange | positioned at the vehicle side using this electric wire.

Japanese Patent No. 4318742 JP 2011-124129 A

However, when producing a primary coil using this electric wire or a normal electric wire, there is no particular problem if the diameter of the primary coil is small. For example, a long primary that can supply power to a plurality of automobiles arranged side by side. When trying to form a coil, it is extremely troublesome, and in particular, when forming a multi-turn coil in a synthetic resin pipe having an elliptical outer shape in plan view, there is a problem that it is extremely difficult. .

The present invention has been made in view of such circumstances, and is a coil or a method for manufacturing a coil, which is large and has a long outer shape (including a rectangle, an ellipse, and an ellipse) in a plan view, and is extremely easy to wind a plurality of turns. The purpose is to provide.

The coil according to the first aspect of the present invention is a coil using a bundle of a plurality of insulated wires, and the conductors of the insulated wires exposed from both ends of the bundle wire are different conductors other than the self. The insulated wires are connected in series.

The coil manufacturing method according to the second aspect of the present invention is a method for manufacturing a long or large-diameter coil, and uses a bundle of a plurality of insulated wires, and both ends of the bundle are the same. A step of arranging the bundled wire at a specific location so as to be in a position, and connecting the insulated wires exposed from both ends of the bundled wire to different conducting wires other than the self, and connecting the insulated wires in series Connecting.

In the above invention, the serial connection of the insulated wires is twisted regardless of whether they are connected by brazing or using connection terminals (twisting). Connected) and may be electrically connected.
In addition, it is preferable to use a litz wire with a metal wire covered with a plurality of insulating coatings as the core wire (that is, the conductive wire) of each insulated wire. The present invention applies.
The present invention is also applied to a case where a plurality of bundled wires (for example, captyre cables) in which a plurality of insulated wires are stored are arranged at a predetermined location.

In the coil according to the first invention and the method for manufacturing the coil according to the second invention, a bundled wire having a plurality of insulated wires is arranged at a predetermined location, and the conductor of each insulated wire exposed from both ends of the bundled wire. Is connected to a different conducting wire other than the self, and the insulated wires are connected in series, and as a result, a coil having a plurality of turns is wound around that portion. Therefore, a single bundled wire having a plurality of coated conductors and insulated wires may be disposed at a predetermined location, and as a result, the coil can be easily manufactured.

In particular, when a cabtire cable is used as a bundled wire, it is easy to obtain the wire, and is usually configured to have weather resistance against temperature, environment, etc., so it is highly safe. It becomes a coil.

It is explanatory drawing which shows the connection state of the coil which concerns on one embodiment of this invention. It is a side view which shows the use condition of the coil. It is a top view which shows the use condition of the coil. It is explanatory drawing which shows the connection state of the coil.

Subsequently, embodiments of the present invention will be connected with reference to the accompanying drawings.
As shown in FIG. 1, a coil 10 according to an embodiment of the present invention uses a captyre cable (an example of a bundled wire) 11 having a predetermined length, and a plurality of insulated wires 12 to 18 inside (in this example, 7 cores). Is protruded on both sides of the captyre cable 11.

And as shown in FIG. 4, the insulated wires 12a-18a which expose each insulated wire 12-18 from the both ends, and the conducting wires 12b-18b, each insulated wire 12-18 is not a self conducting wire but a different conducting wire. The connection terminal (an example of a connector) 20 is connected so that Accordingly, when the conductors 18a and 12b are left and the conductors 12a-13b, conductors 13a-14b, conductors 14a-15b, conductors 15a-16b, conductors 16a-17b, and conductors 17a-18b are connected, all the insulated wires 12-18 are connected. Are connected in series.

In this case, a coil 10 having 7 turns (seven windings) is formed by each of the insulated wires 12 to 18. However, if four coils of the insulated wires 12 to 18 are used in the case of a 4-turn coil. Well, the other should be open. Moreover, the coil of 8 turns or more can be formed by using two or more captyre cables 11 in parallel.

Since each of the insulated wires 12 to 18 passes a high frequency current of, for example, 9 kHz to 100 kHz, current flows only on the surface of each conductor due to the skin effect, and when a solid conductor (for example, copper or aluminum) is used, the substantial resistance is reduced. To increase. Therefore, it is preferable to use a conductive wire having a cylindrical conductor path as the conductor of each of the insulated wires 12-18. The formation of the conductor path may be a case where a cylindrical electric wire is simply used, or a case where a metal conductor plated or vapor-deposited around the insulator is used. Alternatively, a litz wire formed by covering a thin conductor (for example, having a diameter of 0.01 to 1 mm) with an insulating coating and winding or arranging the conductors may be used.

In addition, each of the insulated wires 12 to 18 is covered with an insulating coating or an insulating tube around the inner conductor, and it is preferable to use a flexible and heat-resistant coating as the insulating coating. Moreover, the coating | cover (sheath) which covers these insulated wires 12-18 needs to also have flexibility and heat resistance. Since the captyre cable 11 generates heat when used, a water-cooled tube may be provided in the captyre cable 11, or one of the insulated wires 12 to 18 is omitted, or in addition to the insulated wires 12 to 18, a temperature measuring wire is used. The temperature of the captyre cable 11 can be monitored by this, and when the temperature of the captyre cable 11 is increased, the power supplied to the coil 10 is lowered (specifically, the voltage is lowered or the frequency is changed). )be able to.

The temperature measuring wire is preferably formed of a conductor or a semiconductor whose electrical conductivity increases or decreases as the temperature rises and has a certain bendability. Of course, a copper wire, an iron wire, a nickel wire, a stainless steel wire, a nichrome wire, or the like may be used, but it is preferable to use a metal wire having a high electric resistance in the production of a measuring instrument.

Next, a method for manufacturing and using a long (for example, 5 to 100 m) or large diameter (for example, 0.1 to 5 mm) coil will be described with reference to FIGS. This example demonstrates the case where the coil 10 is arrange | positioned on the floor surface of the parking lot 22 which is an example of a specific place. A groove having an appropriate depth is formed on the floor surface, and a captyre cable 11 having a predetermined number of insulated wires 12 to 18 is arranged in the groove so that both ends are at the same position. Expose 12-18.

In this case, the coil 10 has a rectangular shape with a rounded corner when viewed from above, for example, approximately 10 to 15 m × 0.8 to 1.5 m, and approximately three automobiles are charged. Can be parked in. The embedment depth of the captyre cable 11 is preferably such that the captyre cable 11 does not protrude upward from the floor surface of the parking lot 22 and is close to the floor surface. The cabtyre cable 11 is preferably housed and embedded in a pipe made of an insulator (for example, a pipe made of vinyl chloride), for example, rather than being placed on the floor as it is.

And the insulated wires 12-18 are exposed from the both ends of the cabtyre cable 11, and also internal conducting wires 12a-18a, 12b-18b are exposed, and as shown in FIG. 1, FIG. 4, each connection terminal 20 is used. The conducting wires 12a to 17a and 13b to 18b are connected to make the cabtyre cable 11 into one coil 10. Note that the surface of the connection terminal 20 and the exposed conductors 12a to 18a and 12b to 18b are covered with an insulating cylinder (for example, a tube formed of heat-shrinkable synthetic resin). Thereby, the insulated wires 12 and 18 are pulled out.

The coil 10 is connected to a high-frequency power source 24 that temporarily changes the commercial frequency to a direct current and further converts the commercial frequency into a high-frequency alternating current by an inverter, and acts as a primary coil. On the other hand, the automobiles 25 to 27 are parked so as to straddle the coil 10. And the electric power receiving apparatus 29 provided with the secondary coil in the bottom part of the motor vehicles 25-27 is each provided. As the power receiving device 29, for example, the one described in Japanese Patent No. 4318742 is applied.

The power receiving device 29 has a secondary coil and a resonant coil facing the coil (primary coil) 10, respectively. A capacitor is connected to the resonant coil to form a resonant circuit, and the power from the coil 10 is efficiently used. The power can be received. The electric power received by the secondary coil is rectified by a rectifier circuit and converted into direct current to charge each of the automobiles 25-27.

Here, it is preferable to charge the battery by detecting the charging current. In other words, charging of the battery is detected by a current sensor, and charging is stopped when the charging current falls below a certain value. In this case, the pilot lamp may blink. In addition, the present invention is naturally applied to the case where the battery is charged by detecting the charging voltage.
Each of the automobiles 25 to 27 cuts off the charging circuit and leaves the place after the charging of the battery is completed.

The present invention is not limited to the above-described embodiment, and the configuration thereof can be changed without changing the gist of the present invention. For example, in the above-described embodiment, each conductive wire is connected using the connection terminal 20, but the present invention is also applied to the case where the conductive wires are connected by brazing, welding, winding, or the like.
In the embodiment described above, the outer shape of the coil is rectangular in plan view, but may be oval, elliptical, circular, or other shapes.

In the above embodiment, the captyre cable whose periphery is covered with an insulating material is used in the manufacture of the coil. However, it is also possible to use a bundled wire in which a plurality of insulated wires are bundled. A plurality of insulated wires may be housed in a pipe having a property.
Furthermore, in the said embodiment, although the coil of this invention was applied only to the primary coil, the coil of this invention is applicable to a secondary coil or a resonance coil.
In the above-described embodiment, the primary coil is disposed on the floor surface. However, the primary coil may be disposed in a standing state on a wall surface or a support member, or may be grounded on the ceiling surface.
Furthermore, although the case where the car is carrying out parallel parking in the said parking lot is shown, this invention is applied also when carrying out horizontal parking.
The present invention can also be applied to the case where the charging coil for traveling is installed on the road.

DESCRIPTION OF SYMBOLS 10: Coil, 11: Captyre cable, 12-18: Insulated electric wire, 12a-18a, 12b-18b: Conductor, 20: Connection terminal, 22: Parking lot, 24: High frequency power supply, 25-27: Car, 29: Power reception apparatus

Claims (8)

A coil using bundles of a plurality of insulated wires, wherein the insulated wires exposed from both ends of the bundled wires are connected to different wires other than the self, and the insulated wires are connected in series. Features coil. The coil according to claim 1, wherein the bundled wire is a cabtyre cable whose periphery is covered with an insulating material. The coil according to claim 1, wherein the series connection of the insulated wires is connected by brazing. The coil according to claim 1, wherein the series connection of the insulated wires is performed using a connection terminal. The coil according to any one of claims 1 to 4, wherein a litz wire that is a thin metal wire covered with an insulating film is used as the conductive wire of each insulated wire. . A method of manufacturing a long or large-diameter coil, comprising using a bundle of a plurality of insulated wires, placing both bundles at a specific location so that both ends of the bundle are at the same position, and A method for manufacturing a coil, wherein the insulated wires exposed from both ends of the bundle wire are connected to different wires other than the insulated wires, and the insulated wires are connected in series. The coil manufacturing method according to claim 6, wherein the bundled wire is a cabtyre cable. 8. The method for manufacturing a coil according to claim 6, wherein the serial connection of the insulated wires is performed using a connection terminal.

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