JPH0737300Y2 - choke coil - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a choke coil having a structure in which a bar member for passing a large current is passed through an EI type core.

[Prior Art] Conventionally, for example, a choke coil shown in FIG. 3 is known as an choke coil used in an output circuit for supplying a large current to a load by a stabilized power supply or the like.

In FIG. 3, reference numeral 1 denotes an EI type core which is a combination of an E type core 2 and an I type core, and is thick to allow a large current to flow through the through holes 4a and 4b formed in the EI type core 1. The structure is such that the bus bars 5a and 5b using plate members are penetrated, and the number of the EI type cores 1 is increased to form a choke coil having an inductance of one turn in total.

[Problems to be Solved by the Invention] However, in the conventional choke coil using such a bus bar, the inductance is determined by the number of EI type cores, but there is a restriction on the installation space of the choke coil. Therefore, the number of EI type cores cannot be increased unnecessarily, the number of turns is limited, and there is a problem that the size cannot be reduced if the number of turns is increased.

The present invention has been made in view of the above conventional problems, and a choke which can obtain an inductance corresponding to the required number of turns without impairing miniaturization even if a bar member for passing a large current is used. The purpose is to provide a coil.

[Means for Solving the Problems] First, the present invention is intended for a choke coil having a structure in which a bar member for flowing a large current is passed through each of the through holes of an EI type core in which an E type core and an I type core are combined. To do.

In the present invention, such a choke coil is
Each of the through holes of the mold core is divided into positive and negative of the power supply line, and the input bar member and the output bar member are inserted into the respective through holes from different directions, and the tips of the input / output bar members taken out from the through holes. By connecting the ends of the U-shaped bar member from the outside of the core, a choke coil having an inductance of at least 2 turns is realized.

Further, by using a plurality of U-shaped bar members and straight bar members, the number of turns can be arbitrarily increased as necessary.

[Operation] According to the choke coil of the present invention having such a configuration, the two through holes of the EI type core are used separately for the positive and negative power supply lines, and the input / output bar member and the U-shape are provided in each of the through holes. At least a choke coil having a total of two turns of inductance can be realized by forming one turn each by connecting with the mold bar member, and the choke coil that uses a bar member through which a large current flows can be downsized. Inductance can be increased without loss.

[Embodiment] FIG. 1 is a constitutional view of an embodiment showing one embodiment of the present invention, in which bus bars are omitted by thick solid lines.

In FIG. 1, 1 is an EI type core, and E type core 2 and I
EI type core 1 composed by combining the type core 3
Two through-holes 4a and 4b are formed in this.

In this embodiment, the plus side of the power supply line with respect to the load is assigned to the through hole 4a, and the minus side is assigned to the through hole 4b.
Assigned to.

An input bar member that constitutes a positive power line in the through hole 4a
6a and the output bar member 7a are respectively inserted from different directions, the ends of the bar members 6a, 7a are connected to the ends of the U-shaped bar member 8a, and a current path is formed by the bar member for one turn. .

This point is the through hole 4b to which the negative power line is assigned.
The same applies to the input bar member 6a and the output bar member.
The 7b and the U-shaped bar member 8b form a one-turn current path.

FIG. 2 is an explanatory view showing a specific structure of a bar member in which the one-turn current path shown in FIG. 1 is formed with respect to the core.

In FIG. 2, for example, looking at the positive power supply line side located on the right side, the linear input bar member 6a and the output bar member are linear.
7a are abutted from different directions, both are core through holes 4a
The size (L + 2W) obtained by adding the plate width W to twice the size L is abutted in at least the adjacent state. Since the plate width W on the tip side of the input / output bar members 6a, 7a is taken out from the core through hole, the tip ends of the U-shaped bar member 8a are fixed to the taken-out portions by screws 9, respectively. To form a current path. The U-shaped bar member is one customer part 10a
On the other hand, the other customer part 10b is displaced in the bar alignment direction, and this displacement provides a clearance between the input / output bars 6a and 6b to prevent them from coming into contact with each other.

This point is that the input / output bar members 6b and 7b and the U-shaped bar member 8b that form a one-turn current path on the negative power supply line side.
Is also the same.

According to the embodiment shown in FIGS. 1 and 2, each of the through holes 4a and 4b of the EI type core is assigned to the positive or negative of the power supply line to form a current path of 1 turn as shown in FIG. Since it can be formed, it is possible to realize a choke coil having a total of two turns of inductance, and it is not necessary to increase the number of EI cores. Therefore, it is possible to increase the number of turns while reducing the size of the choke coil.

As another embodiment of the present invention, in addition to the U-shaped bar members 8a and 8b shown in FIG. 2, a linear bar member having a length of at least (L + 2W) is prepared. By connecting the input / output bar members using a plurality of mold bar members, the number of turns of one core through hole can be set to 2 turns.
You can increase it as needed, such as 3 turns.

[Advantage of Device] As described above, according to the present invention, two holes of the EI core are used separately for positive and negative power lines, and each through hole is connected with a bar member to provide a one-turn current path. By providing the above, it is possible to obtain a choke coil having an inductance of at least 2 turns, and it is possible to increase the inductance without impairing the miniaturization of the choke coil.

[Brief description of drawings]

1 is an explanatory view of an embodiment of the present invention; FIG. 2 is an explanatory view of an embodiment of a bar member which constitutes one turn in the present invention; FIG. 3 is an explanatory view of a conventional technique. 1: EI type core 2: E type core 3: I type core 4a, 4b: Through hole 6a, 6b: Input bar member 7a, 7b: Output bar member 8a, 8b: U-shaped bar member 10a, 10b: Customer part

Claims (2)

[Scope of utility model registration request] 1. A choke coil having a structure in which a bar member for flowing a large current is passed through each of the through holes of an EI type core, which is a combination of an E type core and an I type core, wherein each of the through holes is a power supply line. The input bar member and the output bar member are inserted into each of the through holes from different directions, and the end portion of the input / output bar member is connected to the end portion of the U-shaped bar member. A choke coil characterized by having an inductance of 2 turns. 2. The input / output bar members are connected to each other by a plurality of the U-shaped bar members and a straight bar member having a length allowing the tips to be taken out on both sides of the core through hole, thereby increasing the number of turns. The choke coil according to claim 1, wherein the choke coil is provided.