JPH01209710A - Electromagnetic equipment - Google Patents

Abstract

PURPOSE:To reduce the occurrence of the floating of laminated plates, to decrease the overall iron loss and to improve magnetic characteristics, by providing the caulking part of a central-leg iron core at the center of the arc of the junction surface of the central leg. CONSTITUTION:A central-leg iron core 4 and coils 3 are inserted in the inner side of an opening part 9 of a side-leg iron core 5. The central-leg iron core 4 and the side-leg iron core 5 are coupled. At this time, a caulking part 8 is provided at a position close to each junction surface 6 of the central leg of the central-leg iron core 4. The caulking part 8 is located at an equidistance point from the edge part of the central-leg junction surface 6. Since the caulking force is equal as a whole, the occurrence of the floating of laminated plates 4a of the central-leg iron core 4 is less. Since caulking parts 12 are provided at the outer edge sides of the four corner parts in the side-leg iron core 5, eddy current loss is relatively less, and iron loss can be decreased. Therefore, the overall iron loss of a laminated iron core 2 that is formed by coupling the central-leg iron core 4 and the side-leg iron core 5 is decreased. Thus, the magnetic characteristics become excellent.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to electrical equipment such as ballasts, transformers, and reactors for discharge lamps.

(Prior Art) An electromagnetic Illumination device consists of a w4Fm iron core that has a central leg and side legs and constitutes a closed magnetic circuit, and a coil that is wound and fitted around the central leg of this laminated core. In a laminated core, a coil is wound around its central leg, but if the laminated core constituting the closed magnetic circuit is formed integrally in advance, it is extremely troublesome to wind the coil around the central leg. It is divided into a type iron core and a type iron core, and a coil is wound around the center leg of the E type iron core, and then an I type iron core is joined to this E type iron core.
For example, a method of integrating the parts by welding along the laminated outer surfaces of the abutting surfaces of the side legs of the E-shaped iron core and the ■-shaped iron core with a tightening band, a tightening cap, or a side leg of the E-shaped iron core has been adopted.

(Problem to be solved by the invention) However, since the joint surface of the E-type iron core and the joint surface part of the I-shape core are separately stamped, the shapes of the two joint surfaces do not match, and the tightening is difficult. It is difficult to join both joint surfaces uniformly due to variations in the bonding state due to bands, etc., and the joint between the E-type iron core and the center leg resonates due to magnetic vibration when the coil is energized, which tends to cause humming noise. , deterioration of magnetic properties was likely to occur.

Therefore, the patent application filed in 1986 by the same applicant as the applicant concerned.
As described in documents such as No. 2-274122, the laminated core is punched into a central leg core around which a coil is wound, and a side leg core configured into a rectangular annular shape via a yoke. By separating the central leg core and the side leg joint surfaces of the side leg cores using the same punched surface, the joint shapes of both joint surfaces perfectly match during assembly, ensuring a strong and tight contact. By doing so, we are trying to solve the problems mentioned above.

In this laminated core, a plurality of caulking parts are provided in the center leg core and the side leg cores to connect the laminated plates to each other, and the positions of the caulking parts in the center leg core are in the longitudinal direction of the center leg core. Considering the balance, the position of the caulking part on the side leg core is within the range of two places dividing it into three in the longitudinal direction and two places on both sides dividing it into quarters, considering the balance of the shape of the side leg core. There are four locations near both ends of the side legs on both sides and at the center in the width direction of the core.

By the way, in order to combine the central leg core and the side leg cores,
The center leg is press-fitted between the inner sides of the side leg cores, but at this time, the laminated plate on the center leg joint surface of the center leg core may float up due to contact with the side leg cores, which may cause buzzing noise, etc. Cause. This is because the caulking part is provided inwardly from the end of the center leg core, but if the caulking part is placed too close to the end of the center leg core, the effect of deformation due to caulking will be This tends to occur on joint surfaces, and there is a difference in the crimping force between the central part of the center leg joint surface, which is close to the caulking part, and the two sides of the center leg joint surface, which are far from the caulking part, resulting in an imbalance in the press-fit of the central leg joint surface. It even collapses and press-fits.

Furthermore, since the caulked portion of the side leg core is located at the center in the core width direction of the side leg where a large number of magnetic fluxes pass through, eddy current loss increases and the iron loss value increases.

The present invention has been made in view of the above-mentioned problems, and it prevents the UI plate from floating and swells by setting the position of the caulking part in the center leg core, and also facilitates press-fitting into the side leg core. In addition, the eddy current loss in the side leg cores is reduced to lower the iron loss value, and furthermore, the product obtained by combining the central leg core and the side leg core! 111 using iron core
The purpose is to provide equipment.

[Structure of the invention]

(Means for Solving the Problems) The present invention provides an external iron-type electric equipment having a laminated core and a coil fitted into the laminated core, which includes a central leg core around which the coil is wound, and a yoke. This is a laminated core that is separated into a side leg core configured in a rectangular ring shape through a section.

The central leg core is provided at both ends with arcuate convex central leg joint surfaces that join the side leg cores, and a caulking portion that interconnects the laminated plates at the arc center of the central leg joint surface. establish.

In addition, caulking portions are provided on the outer edge sides of the four corners of the side leg core to connect the laminated plates to each other.

Further, a central leg joint surface having a circular convex shape is provided at both ends to be joined by press-fitting between the inner sides of the side leg cores, and
A central leg core is provided with a caulking portion that connects the laminated plates to each other at the center of the arc of the central leg joint surface, and a side leg joint surface is provided where the central leg joint surface of this center leg core joins, and the outer edge of the four corners This is a combination of a side leg core with a caulking portion that connects the laminated plates to each other.

(Function) According to the present invention, the caulking portion of the center leg iron core is relatively close to the center leg joint surface, and the caulking portions are located at equal distances from each edge of the center leg joint surface. The force is uniform throughout and the balance of press-fitting into the side leg core is maintained.

Further, the caulked portions of the side leg cores are located on the outer edge side of the four corners where there is relatively little passage of magnetic flux.

Furthermore, the combination of the center leg core and the side leg cores reduces the overall core loss value of the VI layer core.

(Embodiment) Hereinafter, the configuration of an embodiment of the present invention will be described with reference to FIGS. 1 to 6.

In the figure, reference numeral 1 denotes an electromagnetic device main body, which is composed of a laminated iron core 2 and coils 3 on the negative side and the secondary side.

The laminated core 2 has a structure in which a central leg core 4 around which a coil 3 is wound and a quadrangular annular side leg core 5 are separated by punching.

The center leg core 4 is a laminated plate having a convex arcuate center leg joint surface 6 with a radius r formed by a punched surface with the side leg core 5 on both end faces, and a pass portion 7 approximately in the middle of both sides. A predetermined number of V4-layer plates 4a are laminated, and the V4-layer plates 4a are connected to each other by a caulking portion 8 provided at the center of a circular arc with a radius r of the central leg joint surface 6 to form a laminated structure.

Further, the side leg core 5 has a rectangular opening 9 for housing the center leg core 4 and the coil 3 inside, and
A rectangular annular laminate 5a having a concave arc-shaped side leg joint portion 11 with a radius r, which is formed by a beating surface formed by beating the laminate 4a of the center leg core 4 on the inside of the yoke portion 10, is used as the center leg core. The laminated plates 5a are laminated according to the number of laminated layers of 4, and are interconnected by caulking portions 12 provided on the outer edges of the four corners to form a laminated structure.

As shown in FIG. 3, the caulking portion 8 of the central leg core 4 has a rectangular caulking hole 13 in the two lowermost laminated plates 4a, and a rectangular caulking hole 13 in the upper laminated plate 4a. A letter-shaped caulking uneven portion 14 is provided.

The caulking uneven portion 14 is formed by shortening the wide stroke of the same punch used to punch the caulking hole 13, thereby treating the laminated plate 4a in half, thereby protruding a triangular convex portion 15 from the lower surface and from the upper surface. A triangular concave four portion 16 is provided on the periphery. Then, the caulking holes 13 of the two laminated plates 4a on the bottom layer are
By press-fitting and caulking the convex part 15 of the laminated plate 4a to be laminated thereon, and further press-fitting and caulking the convex part 15 of the laminated plate 4a to be laminated thereon into the concave part 16 of the lower laminated plate 4a, The laminated plates 4a are laminated and connected to each other. The caulking portion 12 of the side leg core 5 also has the same structure as the caulking portion 8 of the central leg core 4. Further, the caulking shape of the caulking portion 8 of the central leg core 4 is provided horizontally in the longitudinal direction of the central leg iron core 4, and the caulking shape of the caulking portion 12 of the side leg iron core 5 is provided in the longitudinal direction of the side leg iron core 5. It is set horizontally along the

In order to assemble the electromagnetic 14 main body 1, the primary and secondary coils 3 wound around coil bobbins (not shown) are respectively attached to both ends of the central leg core 4, and the central leg of the central leg core 4 is The joint surface 6 is connected to the side leg joint surface 11 of the side leg core 5.
By press-fitting the central leg core 4 from above,
Then, the coil 3 is inserted between the inner sides of the opening 9 of the side leg core 5, and the central leg core 4 and the side leg core 5 are combined.

When the center leg core 4 is press-fitted to the side leg core 5, a caulking portion 8 is provided at a position close to the center leg joint surface 6 of the center leg core 4, and the caulking portion 8 is connected to the center leg joint surface 6. are located at equal distances from each edge of the center leg, and the caulking force on the center leg joining surface 6 is uniform throughout, so that the occurrence of floating of the laminate plate 4a of the center leg core 4 is reduced, and press-fitting of the center leg core 4 is prevented. Balance is maintained and press-fitting can be easily performed.

Then, when the medium-heat leg core 4 is press-fitted into the side leg core 5, the center leg joint surface 6 of the center leg core 4 is fitted into the side leg joint surface 11 of the side leg core 5, and positioning in the lateral direction is performed. The center leg joining surface 6 of each laminate plate 4a of this center leg core 4 is a laminate plate 5a of the corresponding side leg core 5 punched from the same laminated blank plate.
By joining with the side leg laminated surface 11 of the side leg, the joined shape completely matches and a strong adhesion is achieved.

Moreover, the electric device main body 1 assembled in this way is mounted on the bottom plate 21 as shown in FIG. It is covered by a case 22 which is caulked to the bottom plate 21.

By the way, at the four corners of the quadrangular annular side leg core 5,
The amount of magnetic flux passing through the inner edge side, which is approximately the same width as the iron core width of the side legs and yoke part 10, is large, but the amount of magnetic flux passing through the outer edge side is relatively small. Therefore, since the side leg core 5 has the caulked portions 12 on the outer edge sides of the four corners where the amount of magnetic flux is relatively small, the eddy current loss due to the caulked portions 12 is relatively small, and the iron loss value can be reduced.

Therefore, the overall core loss value of the laminated core 2 formed by combining the central leg core 4 and the side leg cores 5 is reduced, and the magnetic properties are improved.

Note that caulking portions 12 provided on the outer edge sides of the four corners of the side leg core 5
Eddy current loss can be further reduced by providing caulked shapes facing the corners, as shown in FIG.

Further, in each of the embodiments described above, the caulking portion 8.12 has a substantially square-shaped caulking shape, but it may have a circular caulking shape.

〔Effect of the invention〕

According to the present invention, since the caulking portion of the center leg iron core is provided at the center of the arc of the center leg joint surface, the caulking portion is relatively close to the center leg joint surface, and moreover, the caulking portion is located at each edge of the center leg joint surface. The laminates of the center leg core are located at equal distances from each other, and the caulking force on the joint surface of the center leg can be made uniform throughout the center leg.When press-fitting into the side leg core, the laminate plate of the center leg core is less likely to lift up. The press-fit balance is maintained and the press-fit can be easily performed.

Further, since the caulked portions of the side leg irons are provided on the outer edges of the four corners through which the amount of magnetic flux passing through is relatively small, the eddy current loss of the side leg irons is small, and the iron loss value can be reduced.

Furthermore, by configuring a laminated core by combining the center leg core and the side leg cores, the overall core loss value can be reduced, and an electromagnetic device with good magnetic properties can be provided.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a laminated core showing an embodiment of the electromagnetic device of the present invention, Fig. 2 is a perspective view thereof, Fig. 3 is a sectional view of the caulked portion, and Fig. 4 is a perspective view showing the entire electromagnetic device. 5 are plan views showing other embodiments of the side leg core. 2. Laminated core, 3. Coil, 4. Central leg core, 5
...Side leg iron core, 6..Central leg joint surface, 8..Caulking part,
10... Yoke part, 11... Side leg joint surface, 12... Caulking part.

Claims (3)

[Claims] (1) In an external iron type electromagnetic device having a laminated core and a coil fitted into the laminated core, the laminated core is
The center leg core is separated into a center leg core around which the coil is wound, and a side leg core configured in a rectangular ring shape via a yoke, and the center leg core has an arcuate convex shape joined to the side leg core. An electromagnetic device characterized in that a central leg joining surface is provided at both ends, and a caulking portion for interconnecting the laminated plates is provided at the center of the arc of the central leg joining surface. (2) In an outer iron type electromagnetic device having a laminated core and a coil fitted into the laminated core, the laminated core is
It is separated into a central leg core around which the coil is wound, and a side leg core configured in a rectangular ring shape via a yoke, and the side leg core has laminated plates mutually attached to the outer edges of the four corners. An electromagnetic device characterized by having a connecting caulking part. (3) In an outer iron type electromagnetic device having a laminated core and a coil fitted into the laminated core, the laminated core includes:
The center leg core is separated into a center leg core around which the coil is wound, and a side leg core configured in a rectangular ring shape via a yoke, and the center leg core is press-fitted between the inner sides of the side leg cores. A central leg joint surface having a convex arc shape that is joined by fitting is provided at both ends, and a caulking portion that connects the laminated plates to each other is provided at the center of the arc of the central leg joint surface, and the side leg iron core is connected to the central leg iron core. An electromagnetic device characterized in that a side leg joint surface is provided to which the central leg joint surface of the body joins, and caulking portions are provided on the outer edge sides of the four corners for interconnecting the laminated plates.