JPH03292707A - Electromagnetic equipment - Google Patents

Abstract

PURPOSE:To make it possible to radiate heat effectively from a coil to an iron core, and to make the title electromagnetic machine small in size and light in weight by a method wherein one side face of the sidefaces of recessed part, where a laminated iron core will be inserted, is formed in the same shape as that of the circumference of the coil, and one side face of the inserting recessed part is brought into contact with the circumferential surface of the coil. CONSTITUTION:Both side parts, which are covered by insulating paper 12, of a coil 11 are inserted into both inserting recessed parts 19 of an E-type laminated iron core 16, and one inside face of one inserting recessed part 19, which is formed in a mating shape, is brought into contact with one side face of the inner circumferential surface of the coil 11. Accordingly, a gap (b) in the amount of material thickness only of the insulating paper 12 is generated between one side face of one inserting recessed part 19 and one side face of the inner circumferential surface of the coil 11, and a substantially no gap state is obtained. One edge face of the coil is also brought into contact with the bottom face of both inserting recessed parts 19 of the E-type laminated iron core 16 through the intermediary of the insulating paper 12. Then, the tip face of the side leg part 18 of the E-type laminated iron core 16 is butt- together and fixed to 1-type laminated iron core 21, the other end face of the coil 11 is brought into contact with the 1-type laminated iron core 21 through the intermediary of the insulating paper 12, and spacers 22 and a mounting fixture 33 are assembled.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to electromagnetic equipment such as reactors.

(Conventional technology) The configuration of a conventional glue actor will be explained based on FIG.

1 is a coil formed by winding conductive wire in multiple layers in a rectangular ring shape;
Reference numeral 2 denotes an E-shaped laminated core, and this E-shaped laminated core 2 has an insertion recess 5 between a center leg 3 and a pair of side legs 4.

Further, both sides of the coil 1 that are inserted into the insertion recesses 5 and are likely to come into direct contact with the iron core 2 are covered with insulating paper 6. Further, spacers 7 are provided between the other side portions of the coil 1 along the lateral direction and the central leg portion 3 of the iron core 2, respectively. These spacers 7 are used to ensure an insulating distance between the uninsulated portion of the coil 1 and the iron core 2 and to prevent vibrations of the coil 1 and the iron core 2. Although not shown, a type 1 laminated core is assembled on the side leg portion 4 of the E type laminated core 2.

As shown in the figure, the E-type laminated core 2 is made by stacking thin plates of the same shape neatly so that the outer shape is rectangular or square, and then welding them at the center of the central leg 3 to form a block. ing. Therefore, both side surfaces of both insertion recesses 5 of the iron core 2 are each planar. In addition, the part indicated by 8 in the figure is the welding part.

By the way, the shape of the coil 1 is not rectangular or square due to manufacturing, but has a shape in which both side portions swell outward in the radial direction in an arc shape.

On the other hand, since the side surfaces of the insertion recess 5 of the iron core 2 are flat, when the coil 1 is inserted into these insertion recesses 5, the inner and outer peripheral surfaces of the coil 1 and the side surfaces of the insertion recess 5 For example, between the inner peripheral surface of the coil 1 and the central leg portion 3 of the iron core 2, a gap a as shown in the figure is generated.

However, if there are gaps between the inner and outer circumferential surfaces of the coil 1 and all the side surfaces of both insertion recesses 5 of the iron core 2, it is difficult for the heat generated from the coil 1 to be radiated to the iron core 2 during use. , since the temperature rise of coil 1 is not reduced,
It is necessary to increase the wire diameter of the coil 1, which is an obstacle to making the coil 1 smaller, lighter, and cheaper.

Therefore, structures have been adopted in which the gap between the coil 1 and the iron core 2 is filled with other materials with good thermal conductivity.
This structure requires more materials and assembly time, making it more expensive.

Furthermore, in order to bring the inner or outer peripheral surface of the coil 1 into surface contact with the iron core 2, it is conceivable to shape the coil 1 into a rectangular or square shape, but normally the coil 1 has a wire diameter of 2.
Since it is thicker than 11II11, it is actually very difficult to shape the coil 1 after winding it.

In addition, winding the coil 1 with a dimensional margin around the insertion recess 5 in the core 2 into which the coil 1 is inserted is also a cause of increasing the gap between the coil 1 and the core 2. .

(Problems to be Solved by the Invention) As mentioned above, in conventional electromagnetic equipment, the inner and outer circumferential surfaces of the coil blade are not flat, but the iron core has an insertion recess into which both sides of one coil are inserted. Since all of the surfaces of the coil were flat, the contact area between the coil and the iron core was small, resulting in problems such as ineffective heat dissipation from the coil and an increase in size. Furthermore, methods such as filling the gap between the coil and the iron core with other materials have the problem of increasing assembly man-hours and increasing costs.

The present invention aims to solve these problems, and provides an electromagnetic device that can effectively dissipate heat from the coil to the iron core, and can therefore be made smaller and lighter, as well as easy to manufacture and inexpensive. The purpose is to provide the following.

[Structure of the invention]

(Means for Solving the Problem) In order to achieve the above object, the present invention provides an electromagnetic device such as a reactor that includes a coil and a laminated core having an insertion recess into which a part of the coil is inserted. The shape of one side of the side surfaces in the insertion recess of the laminated core is made to match the shape of the circumferential surface of the coil facing this side, and the shape of one side of the side surface in the insertion recess of the laminated core is made to match the shape of the circumferential surface of the coil opposite to this side. The side surface and the circumferential surface of the coil are in contact with each other.

(Function) In the electromagnetic device of the present invention, at the time of manufacture, one side of the side surface of the insertion recess of the laminated core is shaped to match the shape of the circumferential surface of the coil facing this side. is inserted into the insertion recess of the core, and one side of the laminated core in the insertion recess, which has been shaped to match, and the curved surface of the coil are brought into surface contact with each other. During use, the heat generated from the coil is reliably transmitted to the laminated core through the contact surface between the coil and the laminated core, promoting heat dissipation from the coil and reducing the temperature rise of the coil.

(Embodiment) Hereinafter, the configuration of an embodiment of the electromagnetic device of the present invention will be described with reference to FIGS. 1 and 2.

Reference numeral 1 denotes a coil, and this coil I+ is formed by winding a conductive wire in multiple layers in a rectangular ring shape. In addition, this coil 1
In the shape of No. 1, both side portions are bulged in an arc shape toward the outside in the radial direction. Further, both sides of the coil 11 along the longitudinal direction are covered with insulating paper 12. Further, although not shown, the coil 11 is provided with a terminal or lead wire for connection to an external electric circuit.

16 is an E-type laminated core, and this E-type laminated core 16 has a center leg 17 and a pair of side legs 18. Between the center leg 17 and the pair of side legs 18, there is a , said coil 1
A pair of insertion recesses 19 are formed into which both side portions covered by the insulating paper 12 in the recess 1 are inserted, respectively. Note that the central leg portion 17 is slightly shorter than the side leg portions 18.

Reference numeral 21 denotes a ■-shaped laminated core. This ■-shaped laminated core 21 is fixed so as to straddle the tip surfaces of both legs 18 of the E-shaped laminated core 16, and the insertion recess 19 is inserted into the insertion recess 19 on this tip surface side. It is a blockage.

22 is a pair of spacers made of an insulator, and these spacers 21 are connected to the insulating paper 12 on the inner peripheral surface of the coil 11.
These are interposed between the both sides uncovered by the central leg portion 17 of the E-shaped laminated core 16 and the outer surface of the ■-shaped laminated core 2I, respectively.

Reference numeral 23 denotes a mounting bracket, which is fixed to the surface of the E-type laminated core 16 opposite to the R-type laminated core 21, and is used to attach electromagnetic equipment including the coil 11, cores 16, 21, etc. to various devices. It is intended for installation on.

In addition, the E-shaped laminated core 16 is made into a block by laminating thin plates of the same shape in the shape of a dovetail eight, and then welding the center part of the central leg part 17 as a welding point 26. The plurality of thin plates are laminated with slight offsets in the direction in which the legs 17, 18 are lined up, and the six sides of each leg 17, 18 arranged parallel to this direction are each curved in an arc shape. Thus, the shapes of these side surfaces match the shape of the inner circumferential surface of the side portion of the coil 11 inserted into the insertion recess 19. Each leg +7.
Four of the six sides of Ill have insertion recesses 19.
The convexly curved side surface on the side of the center leg 1 inside the insertion recess 19 is
It faces parallel to one side of the inner peripheral surface of the coil 11 which is curved in a concave shape, and is in surface contact with one side of the inner peripheral surface of the coil 11 via the insulating paper 12.

Next, the operation of the above embodiment will be explained.

During manufacturing, a block holding jig is used to block the E-shaped laminated core 16, but at this time, instead of using a conventional block holding jig, the inside of the coil 11 is A presser jig is used to create a block with a curved surface similar to the shape of the peripheral surface. If the central leg portion 17 is welded after stacking and shaping using such a holding jig for forming blocks, the outer shape will be deformed to match the shape of the inner circumferential surface of the coil 11, as described above. E-type laminated core 16 can be made.

Then, as shown in FIG. 1, both sides of the coil 11 covered with the insulating paper 12 are inserted into both insertion recesses 19 of this E-shaped laminated core 16, and one of the insertion recesses 19 that has a matching shape is inserted. One side of the inside of the recess 19 and one side of the inner peripheral surface of the coil II are brought into contact with each other via the insulating paper 12. Therefore, between one side of the insertion recess 19 and one side of the inner circumferential surface of the coil H, a gap corresponding to only the material thickness of the insulating paper 12 is created, so that there is virtually no gap. Become. In addition,
One end surface of the coil 11 also has both insertion recesses 1 of the E-type laminated core 16.
It comes into contact with the bottom surface of the inner wall 9 through an insulating paper 12.

When bringing the side surface of the E-shaped laminated core 16 inside the insertion recess I9 into contact with the circumferential surface of the coil 11 in this manner, it is preferable to bring the inner circumferential surface of the coil 11 into contact with the outer circumferential surface of the coil 11 instead of the outer circumferential surface. This is due to the following reasons. In other words, the coil 11 is constructed by winding a conductive wire around the outer circumference of a winding jig, but the dimensions of the inner circumferential surface of the coil 11, especially at the corners, are almost exactly determined by the dimensions of the winding jig. It's decided. Therefore, if the winding jig is made with a dimension equal to the width of the central leg 17 of the E-type laminated core 16 plus the material thickness of the insulating paper 12, when the coil 11 is inserted, the E-type laminated core 16 can be laminated. The coil 11 can be easily positioned on the direction surface side, and
The center leg 17 of the laminated core 16 prevents the coil 11 from shifting in the left-right direction in the figure, so the coil 11 is placed on one side of the center leg 17 in one insertion recess I9.
One side of the inner circumferential surface of the two will inevitably come into contact with each other.

Next, the end surfaces of the side legs 18 of the E-shaped laminated core 16 are brought into contact with the ■-shaped laminated core 21 and fixed by welding. In this state, the other end surface of the coil 11 contacts the ■-shaped laminated core 21 via the insulating paper 12. In the illustrated embodiment, the I-shaped laminated core 21 is formed into a rectangular block, whereas the E-shaped laminated core 16 has an outer shape with leg portions 17.1.
8 has a curved shape at both ends when viewed from the tip side, so the joint between the two cores 16 and 21 will be misaligned, but realistically this misalignment is about 3rm at most, and therefore the core 16. There is no problem with the weldability or electrical characteristics of ゜21. However, the shape of the ■-shaped laminated core 21 may be matched to the external shape of the E-shaped laminated core 16 when it is made into blocks.

Then, the spacer 22 and the mounting bracket 23 are assembled.

During use, heat generated from the coil 11 is transmitted to the iron cores 16.21 via the contact surfaces between the coil 11 and the iron cores 16.21, and is radiated. At this time, in addition to the end surface of the coil 11 being in contact with the iron core 16.21, one side of the inner peripheral surface of the coil 11 having a large area is touching one side of the insertion recess 19 of the E-type laminated core 16. Due to the secure contact and the large contact area between the coil 11 and the iron core 16.21, heat conduction is ensured, heat radiation from the coil 11 is promoted, and the temperature rise of the coil 11 is reliably reduced. be done.

In addition, in the current near conditioner glue actor, the temperature class is H class, and the temperature of the coil 11 is allowed up to 180°C, but the surface temperature of the iron core 16.21 is usually 100°C.
It will be around ℃. The heat dissipation effect due to the contact between the inner circumferential surface of the coil 11 and one side of the insertion recess 19 of the E-shaped laminated core 16 is actually greatly improved, and due to this contact, the coil 11 The temperature rise value of 10
It is possible to easily lower the temperature by about ℃.

By being able to reduce the temperature rise of the coil 11 in this way, it is possible to reduce the wire diameter of the coil 11, and the reactor body consisting of the coil 11 and the iron core 16° 21 can be made smaller and lighter. It can be done cheaply.

In addition, it is a structure to improve heat dissipation, or it is a simple structure that only changes the alignment of the block E-shaped laminated core 16, so a structure such as filling the gap between the coil and the core with another material is also available. Compared to , there is no increase in materials and assembly man-hours, and it is easy to manufacture and can be made at a lower cost.

When configuring the core according to the shape of the inner peripheral surface of the coil, the alignment shape of the laminated core can be determined after the coil is assembled according to the side shape of the coil, or the alignment shape of the laminated core can be determined separately from the coil assembly. The laminated cores may be aligned and formed in a preset shape.

〔Effect of the invention〕

According to the present invention, the shape of one of the side surfaces in the insertion recess of the laminated core into which the coil is inserted is made into a shape that matches the shape of the circumferential surface of the coil opposite to this side surface, and these Since one side of the insertion recess of the laminated core and the circumferential surface of the coil are in contact with each other, the heat generated by the coil can be effectively radiated to the core, reducing the temperature rise of the coil. Therefore, it is possible to reduce the wire diameter of the coil, and the entire electromagnetic equipment can be made smaller.
Can be made lighter. At the same time, it is possible to improve heat dissipation through a simple structure that only changes the alignment shape of the laminated core, which requires less material and assembly man-hours than a structure in which the gap between the coil and the core is filled with other materials. It is cheaper because there is no increase in

[Brief explanation of the drawing]

Fig. 1 is an F-side view showing an embodiment of the electromagnetic device of the present invention with the I-shaped laminated core and mounting brackets omitted, Fig. 2 is a perspective view of the overall appearance of the same, and Fig. 3 is an example of a conventional electromagnetic device. I indicating
FIG. 3 is a top view with the shaped laminated core and mounting brackets omitted. 1... Coil, 16... Laminated core, 18... Insertion recess.

Claims (1)

[Claims] (1) A laminated core having a coil and an insertion recess into which a part of the coil is inserted, and the shape of one side of the side surface of the insertion recess of the laminated core is changed to the shape of the coil opposite to this side. An electromagnetic device characterized by having a shape that matches the shape of the circumferential surface, and one side of the insertion recess of these laminated cores having the matching shape and the circumferential surface of the coil are brought into contact with each other.