JPH10270273A - Different loading system detachable type electric power supplying method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a different loading system detachable type electric power supplying method, wherein miniaturization and weight reduction of one side electromagnetic member are realized. SOLUTION: In this method, a primary side electromagnetic member 18 constituted of an iron core 11 and a coil 13 is formed. The primary side electromagnetic member 18 is made detachable with respect to a secondary side electromagnetic member 17, constituted of an iron core 12 and a coil 14. At the time of attachment, electric power is supplied from the primary side electromagnetic member 18 to the secondary side electromagnetic member 17 by using electromagnetic induction. At this time, the specific electric loading of one side electromagnetic member 17 is made small, and the specific electric loading of the other side electromagnetic member 18 is made large. By the improvement in the efficiency of the electromagnetic member 17 whose specific electric loading is made small, the size and the weight of the other side electromagnetic member 18 for receiving the same electric power supply can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for supplying power from a primary electromagnetic member to a secondary electromagnetic member.
The present invention relates to a detachably mounted detachable power supply method for reducing the size and weight of one electromagnetic member.

[0002]

2. Description of the Related Art As a method of supplying electric power from an electric device to another electric device in a non-contact manner, one electric device has a core wound with a primary coil, and the other electric device has a secondary core. There is a method in which a magnetic circuit is formed to pass through each iron core by providing an iron core around which the side coil is wound, and supplying a current to the primary coil, thereby generating an electromotive force in the secondary coil.

[0003] In order to achieve free or planar movement of a moving body, there is a moving body which is equipped with a rechargeable battery and moves by using the power of the battery. In order to simplify the charging of this battery, the moving body should have an iron core with a secondary coil wound around it, and power supply equipment with an iron core with the primary coil wound around it should be installed at appropriate places in the moving area. It has been proposed that power is supplied from a power supply facility to a mobile body by the above method.

As shown in FIG. 2, in the non-contact power supply method proposed by the present applicant, two flat iron cores 2 are separated from each other by a predetermined distance. The planes 2a are arranged so as to face each other. Coils 4, 4 are wound around these two cores 2, 2, respectively. On the other hand, another coil 3 is wound around the flat core 1 that can be inserted between the two cores 2. This iron core 1 is replaced with the above two iron cores 2,
When inserted between the two coils, power can be supplied from one coil to the other coil in a non-contact manner.

[0005] At the ends of the mutually opposed deflected surfaces 1a, 2a of the three iron cores 1, 2 are raised portions 1b, 2b, respectively.
Are formed. These raised portions 1b, 2b are raised at right angles from the ends of the respective deviated planes 1a, 2a so that the raised portions 1b, 2b of the iron cores 1, 2 adjacent to each other narrow the gap 6. Therefore, the iron core 1 is an I-shaped iron core having a cross section of an “I” shape, and the iron cores 2 and 2 have a modified I type (I ′) having a cross section of a “[” shape or “]” shape.
Type) Iron core.

The periphery of the iron core 1 and the coil 3 is covered with a reinforcing insulating layer 5 which electrically insulates and protects the coil 3 and has mechanical strength. The reinforcing insulating layer 5 is made of, for example, an epoxy cured resin.

[0007] Such iron cores 2 and 2 are mounted on a moving body,
The secondary coils 4, 4 wound around the iron cores 2, 2 are connected to a rechargeable battery of the moving body. Further, the iron core 1 is fixedly installed at a predetermined place in a moving place where the moving body moves, and the primary coil 3 wound around the iron core 1 is connected to a power source. After the moving body has moved to a predetermined place in the moving place, the core 1 is inserted between the cores 2 and 2 to perform charging.

[0008]

By the way, in the above method, if the moving body is relatively large and the power receiving member mounted thereon and the power supply member on the side of the power supply equipment are relatively small, both of them are required. It is difficult to stop the large moving body by approaching the power supply equipment until the members are fitted. in this case,
It is necessary to leave the power supply member on the power supply facility free to move, and to move the power supply member to the power reception member of a large moving body stopped near the power supply facility. For example, in a system that provides a charging service to an electric vehicle at a service station, the service station includes a portable power supply member. As described above, it is desired that the portable and detachable power supply member be reduced in size and weight.

However, FIG. 2 shows a specific electric load (winding current density, core magnetic flux density) on the primary side and a secondary side, like a conventional transformer in which the iron core 1 and the iron cores 2, 2 are integrated. Is the same as the specific electrical loading. Specifically, the balance of the overall transformer is achieved by making the amount of copper (total cross-sectional area or total weight in the window of the copper wire) and the amount of iron core the same. If the specific electrical load is reduced in order to improve the power efficiency, the amount of copper and the amount of iron core are increased as a whole, which is contrary to the demand for miniaturization and weight reduction.

It is an object of the present invention to solve the above-mentioned problems and to provide a detachably mounted detachable power supply method for reducing the size and weight of one electromagnetic member.

[0011]

In order to achieve the above object, the present invention provides a primary electromagnetic member comprising an iron core and a coil which is detachable from a secondary electromagnetic member comprising an iron core and a coil. In a method of supplying electric power from a primary electromagnetic member to a secondary electromagnetic member by electromagnetic induction, a specific electric load of one electromagnetic member is reduced and a specific electric load of the other electromagnetic member is increased.

[0012] Even if the iron core of one electromagnetic member has a larger cross-sectional area than the iron core of the other electromagnetic member, and the copper dose of the coil of the same one electromagnetic member is larger than the copper dose of the coil of the other electromagnetic member. Good.

[0013]

An embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

As shown in FIG. 1, in the power supply apparatus based on the detachable power supply method according to the present invention, two flat iron cores 12 are spaced apart from each other by a predetermined distance. The respective deflected planes 12a are arranged so as to face each other. Coils 14, 14 are wound around these two iron cores 12, 12, respectively. On the other hand, another coil 13 is wound around the flat iron core 11 that can be inserted between the two iron cores 12. When the iron core 11 is inserted between the two iron cores 12, 12, power can be supplied from one coil to the other coil in a non-contact manner. A high-frequency core material is used for each of the cores 11 and 12.

Each of the three iron cores 11 and 12 has a raised portion 1
1b and 12b are formed. These raised portions 11b,
12b is a raised portion 11 of the iron cores 11 and 12 adjacent to each other.
b and 12b are raised at right angles from the ends of the respective deflected planes 11a and 12a so that the gap 16 is narrowed. Accordingly, the iron core 11 has an I-shaped cross section.
The cores 12 and 12 are modified I-type (I'-type) iron cores having a cross section of a "[" shape or "]" shape.

The present invention is characterized in that the specific electrical load of the electromagnetic member which is in the stationary state at the time of power supply is reduced, and the specific electrical load of the electromagnetic member which is moved to and detached from the electromagnetic member is increased. is there. The power supply device of FIG.
2 and 12, which are in a stationary state at the time of power supply, for example, as a secondary electromagnetic member 17 of an electric vehicle, and to which the iron core 11 as a portable primary electromagnetic member 18 is attached and detached. Therefore, the size (cross-sectional area, height) of the iron cores 12, 12 is made larger than that of the iron core 11. For comparison, the iron core 1 of FIG. 2 according to the conventional method and the iron core 11 of FIG. 1 according to the present embodiment are drawn in the same size. Therefore, it can be seen that the iron cores 12, 12 are considerably larger than the iron cores 2, 2 in FIG.

The periphery of the iron core 11 and the coil 13 is covered with a reinforcing insulating layer 15 which electrically insulates and protects the coil 13 and has mechanical strength. The reinforcing insulating layer 15
For example, it is made of an epoxy cured resin.

In this embodiment, the coil 13 wound around the iron core 11 is a primary coil, that is, a primary electromagnetic member 18, and is connected to, for example, a power source of a service station. The coils 14, 14 wound around the iron cores 12, 12 are secondary coils, ie, the secondary electromagnetic member 1
7, which is connected to a rechargeable battery. Here, in order to make the secondary electromotive force the same as the conventional one, the number of turns of the coil 14 is shown in FIG.
If the number of turns of the coil 4 is the same, the copper wire length of the coil 14 becomes longer because the iron core 12 is thicker. Then, the electric resistance value tends to increase because the length of the copper wire is long, but the increase in the electric resistance value is offset by making the copper wire thicker. That is, in order to increase the cross-sectional area of the copper wire corresponding to the increase in the length of the copper wire, the diameter of the copper wire is increased to reduce the electric resistance value. As described above, with respect to the copper wire of the coil, the length of the copper wire and the diameter of the copper wire are increased so that the secondary side electromagnetic member 17 is increased.
Is configured to reduce the specific electric load.

According to the above construction, the iron cores 12, 12 constituting the secondary electromagnetic member are made thicker, and the coil 14, which also constitutes the secondary electromagnetic member, is made thicker. Specific electrical loading (winding current density, iron core magnetic flux density). This reduces power loss on the secondary side, reduces heat generation, and facilitates cooling. Further, since the heat generated by the secondary electromagnetic member 17 is reduced, the temperature rise of the primary electromagnetic member 18 sandwiched between the secondary electromagnetic members 17 can be suppressed. As described above, since the size and weight of the secondary-side electromagnetic member 17 are not so limited, the structure is such that the amount of heat generation is suppressed with an emphasis on efficiency. In contrast, the primary electromagnetic member 1
The iron core 11 and the coil 13 constituting 8 have a relatively large specific electric load but a relatively small size, so that a reduction in size and weight can be achieved. Overall, the size and weight can be reduced and the power supply efficiency can be improved.

In the above embodiment, the iron core 11 around which the primary coil is wound (the primary electromagnetic member 18 whose specific electric load is increased) is portable, and the iron cores 12 and 12 around which the secondary coil is wound (specific electric member 12). The secondary-side electromagnetic member 17) with a smaller load was mounted on a relatively large moving body. Conversely, the iron cores 12, 12 around which the primary-side coils were wound were fixedly installed, and the secondary-side coils were wound. The iron core 11 may be mounted on a relatively small moving body.

[0021]

The present invention exhibits the following excellent effects.

(1) One of the electromagnetic members can be reduced in size and weight, so that it can be easily used on a mobile or portable basis.

(2) The other electromagnetic member suppresses heat generation,
For this reason, cooling of the whole becomes easy.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a power supply device according to a method of the present invention.

FIG. 2 is a cross-sectional view of a power supply device according to a conventional method.

[Explanation of symbols]

 11, 12 Iron core 13, 14 Coil 17 Secondary electromagnetic member 18 Primary electromagnetic member

Claims (2)

[Claims] 1. A primary electromagnetic member comprising an iron core and a coil is formed, and the primary electromagnetic member is detachable from a secondary electromagnetic member comprising an iron core and a coil. A method for supplying electric power to a secondary electromagnetic member by electromagnetic induction, wherein a specific electric load of one electromagnetic member is reduced and a specific electric load of the other electromagnetic member is increased. . 2. The iron core of one electromagnetic member has a larger cross-sectional area than the iron core of the other electromagnetic member, and the copper dose of the coil of the same one electromagnetic member is larger than the copper dose of the coil of the other electromagnetic member. 2. The method of claim 1, further comprising the steps of: