JP6566351B2 - Laminated iron core and stationary electromagnetic equipment - Google Patents

Description

  The present invention relates to a laminated iron core and a stationary electromagnetic device.

  As a background art of this technical field, the abstract of the following Patent Document 1 states that “the steel plate group in which the butt positions of the steel plates are alternated at every fixed number of sheets and the butt positions are the same. Is introduced into the steel plate at the position where the virtual plane formed by connecting the butt faces of the group intersects the other steel plate group, or the thickness of the steel plate at that part is reduced. It is described. Further, the scope of claims of the following Patent Document 2 is characterized in that, in a static induction electrical equipment core having a gap in the middle of a magnetic path, at least the periphery of the gap is covered with a diamagnetic material. It is described.

JP-A-7-283036 JP-A-1-93105

In the techniques of Patent Documents 1 and 2, a laminated iron core is configured by laminating while laminating (butting) thin plate-like magnetic materials. Here, since the gap formed at the abutting portion has a large magnetic resistance, the magnetic flux flowing through each magnetic material flows so as to bypass the innermost magnetic material in the gap portion. Assuming that the abutting positions are alternately shifted for each layer, and paying attention to the magnetic material disposed on the surface other than the surface of the laminated iron core, the “adjacent magnetic material” is a magnetic material of two surfaces facing each other across a gap. is there. On the other hand, paying attention to the magnetic material disposed on the surface of the laminated iron core, the “adjacent magnetic material” is a magnetic material on one surface adjacent to the inside of the gap. Then, in the gap portion of the magnetic material arranged on the surface, there is a problem that the magnetic flux flows concentrating on this “one-side magnetic material adjacent to the inner side” and the iron loss increases.
This invention is made | formed in view of the situation mentioned above, and aims at providing the laminated iron core and stationary electromagnetic device which can suppress an iron loss.

In order to solve the above-mentioned problems, the laminated core of the present invention is formed by laminating a plurality of thin plate-like magnetic materials in the thickness direction to form a single layer and laminating the plurality of single layers. The abutting location in each single layer is changed to one or a plurality of the monolithic laminated core body, and the abutting location in the single layer disposed on the surface of the laminated core And a patch-like magnetic material fixed so as to cover the joint.

  According to the laminated core and the stationary electromagnetic device of the present invention, iron loss can be suppressed.

(A) The perspective view which shows the external appearance of the laminated iron core of 1st Embodiment of this invention, (b) It is sectional drawing of the principal part. (A) The perspective view which shows the external appearance of the laminated iron core of the comparative example 1, (b) It is sectional drawing of the principal part. It is sectional drawing of the principal part of the laminated iron core of 2nd Embodiment. 6 is a cross-sectional view of a main part of a laminated core of Comparative Example 2. FIG. It is sectional drawing of the principal part of the laminated iron core of 3rd Embodiment. 6 is a cross-sectional view of a main part of a laminated core of Comparative Example 3. FIG. It is a perspective view which shows the external appearance of the laminated iron core of 4th Embodiment. It is a perspective view which shows the external appearance of the laminated iron core of 5th Embodiment. It is sectional drawing of the principal part of a modification.

[First Embodiment]
(Configuration of the embodiment)
First, the structure of the laminated iron core which is the three-phase tripod iron core by 1st Embodiment of this invention is demonstrated. Fig.1 (a) is a perspective view of the laminated iron core by this embodiment, FIG.1 (b) is the II 'sectional drawing.
In FIG. 1A, a thin plate-like magnetic material 1 is obtained by cutting out a magnetic material (in this embodiment, an electromagnetic steel plate) into various shapes such as a substantially trapezoidal shape, a substantially unequal side quadrilateral shape, and a substantially pentagonal shape. These thin plate-like magnetic materials 1 (hereinafter simply referred to as “magnetic material 1”) are arranged on a plane formed in the vertical and horizontal directions, and the surfaces in the thickness direction are brought into contact with each other. A single layer). However, since it is difficult to bring the magnetic materials that have been brought into close contact with each other without any gaps, a gap having a certain width is formed at the place of contact.

  1B shows the cross-sectional shape of the magnetic material 1 from the foremost layer to the sixth layer, and these magnetic materials 1 are denoted by reference numerals 1a, 1b,..., 1f in order from the foremost layer. Further, gaps formed at the abutting portions of these magnetic materials are indicated by reference numerals 5a, 5b, and 5c. As shown in the figure, the laminated core body 10 is configured by laminating the magnetic materials 1a to 1f while changing the abutting location for each N (N = 2 in the present embodiment) layer. Moreover, the part in which these gaps 5a, 5b, and 5c are formed is generically called "step lap joint location 3". Accordingly, as shown in the figure, the step lap joint portion 3 has a certain width.

  Returning to FIG. 1A, the laminated core body 10 includes U-phase, V-phase, and W-phase magnetic leg portions 10U, 10V, and 10W, and these magnetic leg portions at the upper and lower ends while intersecting with these magnetic leg portions. It has the yoke part 10Y couple | bonded mutually. In the foremost layer of the laminated core, patch-like magnetic materials 20 to 27 are fixed so as to cover the front surface of the gap of the magnetic material 1. A patch-like magnetic material formed in the same manner as the patch-like magnetic materials 20 to 27 is fixed to the magnetic material 1 of the last layer (not shown) so as to cover the rear surface of the gap. The patch-like magnetic materials 20 to 27 are formed by cutting the same material as the magnetic material 1 into a rectangular shape.

  In FIG. 1B, when the magnetic flux in the laminated magnetic material is schematically indicated by arrows, magnetic fluxes 4a to 4f in the figure are obtained. Since the gaps 5a, 5b, and 5c are mainly composed of air, the magnetic permeability is smaller than that of the magnetic material, and the magnetic resistance is increased. Therefore, in the vicinity of the gaps 5a, 5b, and 5c, the magnetic flux flowing in each magnetic material detours to another adjacent magnetic material.

  In the magnetic materials 1b,..., 1e arranged on the surface other than the surface of the laminated iron core, any adjacent magnetic materials 1a, 1b,. For example, paying attention to the magnetic material 1b, in the vicinity of the gap 5a, the magnetic flux 4b flowing through the magnetic material 1b bypasses the gap 5a via the magnetic material 1c and returns to the magnetic material 1b again. On the other hand, in the magnetic material 1a arranged on the surface, in the vicinity of the gap 5a, the magnetic flux 4a bypasses the patch-like magnetic material 20 and returns to the magnetic material 1a again.

  As described above, since the magnetic fluxes 4a and 4b flow in the thickness direction of the magnetic materials 1a and 1b in the vicinity of the gap 5a, a large eddy current is generated in the portion, thereby increasing Joule loss. As described above, an increase in Joule loss is unavoidable in the vicinity of the gap 5a. However, in this embodiment, since the magnetic flux 4a flowing through the magnetic material 1a bypasses the patch-like magnetic material 20, the increase in Joule loss is very large. Must not. This also applies to the other patch-like magnetic materials 21 to 27.

  The laminated iron core of this embodiment can be applied to various stationary electromagnetic devices. For example, a three-phase transformer is configured by winding U-phase, V-phase, and W-phase primary and secondary windings around the magnetic leg portions 10U, 10V, and 10W. Further, when only one winding system of each of the U phase, V phase, and W phase is wound around the magnetic leg portions 10U, 10V, and 10W, a three-phase reactor is configured. This also applies to other embodiments described later.

(Comparative Example 1)
Next, in order to clarify the effect of this embodiment, the structure of the laminated iron core of the comparative example 1 is demonstrated. 2A is a perspective view of a laminated iron core according to Comparative Example 1, and FIG. 2B is a cross-sectional view taken along the line II ′. 2 (a) and 2 (b), the same reference numerals are given to portions corresponding to the respective portions in FIGS. 1 (a) and 1 (b). 2A and 2B, the laminated core of Comparative Example 1 has the same laminated core body 10 as that of the first embodiment, but does not have the patch-like magnetic materials 20 to 27. This is different from the laminated core of the first embodiment.

  In FIG. 2B, a magnetic flux 4a flows through the magnetic material 1a in the forefront layer. In the vicinity of the gap 5a in the magnetic material 1a, the magnetic resistance is smaller when the magnetic materials 1b and 1c are bypassed than in the external air region. For this reason, the magnetic flux 4a bypasses from the magnetic material 1a to the magnetic material 1c via the magnetic material 1b, and further returns to the magnetic material 1a via the magnetic material 1b. Therefore, since the magnetic flux 4a crosses the thickness direction of the magnetic materials 1a, 1b, and 1c four times, a large eddy current is generated each time and Joule loss increases.

  Further, in the vicinity of the gap 5a, two magnetic fluxes 4a and 4b flow into the magnetic material 1c in the thickness direction. In practice, this means that the magnetic flux density is approximately doubled at that location. In general, the eddy current loss caused by the magnetic flux vertically interlinking in the thin plate magnetic material is proportional to the square of the magnetic flux density. Thereby, compared with the case where only one system of magnetic flux flows, the Joule loss is about four times.

(Effect of embodiment)
As described above, according to the present embodiment, the magnetic flux 4a flowing through the magnetic material 1a can be diverted to the patch-like magnetic materials 20 to 27, so that the number of times the magnetic flux 4a crosses the magnetic material as compared with Comparative Example 1. The magnetic flux flowing into the magnetic material 1c in the vicinity of the gap 5a can also be reduced. Thereby, especially the Joule loss resulting from the magnetic flux 4a can be reduced rather than the comparative example 1, and, thereby, the magnetic loss of the whole laminated iron core can also be reduced.

  Moreover, in this embodiment, since the same material as the thin plate-like magnetic material 1 is used as the patch-like magnetic materials 20 to 27, the patch is formed using the end-cut material after the magnetic material 1 is cut out from the roll-shaped raw material. Magnetic magnetic materials 20 to 27 can be manufactured. Thereby, Joule loss can be reduced without causing an increase in raw material costs. Moreover, since the magnetic steel sheet is applied as the magnetic material 1 and the patch-like magnetic materials 20 to 27, the workability when cutting the patch-like magnetic materials 20 to 27 can be improved as compared with a relatively hard and brittle amorphous material. However, as a matter of course, an amorphous material may be applied as the magnetic material 1 or the patch-like magnetic materials 20 to 27 in place of the electromagnetic steel plate.

  Furthermore, in this embodiment, all the patch-like magnetic materials 20 to 27 are fixed to the yoke portion 10Y, and the portions of the magnetic leg portions 10U, 10V, and 10W that do not intersect the yoke portion 10Y are patched. The magnetic materials 20 to 27 are not fixed. Accordingly, when the winding is wound around the magnetic leg portions 10U, 10V, and 10W, the patch-like magnetic materials 20 to 27 are not sandwiched, and the degree of adhesion between the magnetic leg portions 10U, 10V, and 10W and the winding is increased. be able to.

  Furthermore, in the present embodiment, the gap formed at the abutting portion of the magnetic material 1 is linear, and the patch-like magnetic materials 20 to 27 have a long side along the gap and a short side larger than the width of the gap. It is formed in a substantially rectangular shape having sides. Therefore, the patch-like magnetic materials 20 to 27 can be configured by cutting out a sufficiently long magnetic material first and fixing it to the laminated core body 10 while cutting it appropriately. Thereby, it is not necessary to determine and cut out the dimensions of the patch-like magnetic materials 20 to 27 from the beginning, and workability can be improved.

  On the other hand, by forming the patch-like magnetic materials 20 to 27 in a substantially rectangular shape, a portion of the gap of the magnetic material 1 that is not covered by the patch-like magnetic materials 20 to 27 is generated. For example, when attention is paid to the patch-like magnetic material 24 shown in FIG. 1A, gaps in portions not covered by the patch-like magnetic material 24 are slightly generated in the upper right and lower left portions of the patch-like magnetic material 24. However, the gap that is not covered with the patch-like magnetic materials 20 to 27 is present at the peripheral edge of the laminated core body 10 and the magnetic flux density of the portion is low, so the influence is relatively small.

[Second Embodiment]
(Configuration of the embodiment)
Next, the laminated iron core structure of 2nd Embodiment of this invention is demonstrated. The overall appearance of the laminated core of the present embodiment is the same as that of the first embodiment (FIG. 1A). However, in this embodiment, the II ′ cross-sectional view in FIG. 1A is as shown in FIG. In FIG. 3, parts corresponding to those in FIGS. 1 and 2 are denoted by the same reference numerals.

  FIG. 3 shows the cross-sectional shapes of the magnetic materials 1a to 1f from the frontmost layer to the sixth layer. These magnetic materials 1a to 1f are stacked while the abutting locations are alternately changed for each layer to constitute a single step lap joint. And the gaps 5a-5f are formed in each collision location. A patch-like magnetic material 20 is fixed to the frontmost magnetic material 1a so as to cover the front surface of the gap 5a. When the magnetic flux in the laminated magnetic material is schematically indicated by arrows, magnetic fluxes 4a to 4f in the figure are obtained. Since the magnetic resistance of the gaps 5a to 5f increases, the magnetic flux flowing in each magnetic material branches and detours to other adjacent magnetic materials. For example, the magnetic flux 4a flowing through the magnetic material 1a branches near the gap 5a, detours via the patch-like magnetic material 20 and the magnetic material 1b, and then returns to the magnetic material 1a. The magnitude of the branched magnetic flux is about ½ of the original magnetic flux.

(Comparative Example 2)
Next, in order to clarify the effect of this embodiment, the structure of the laminated iron core of the comparative example 2 is demonstrated. The overall appearance of the laminated core of Comparative Example 2 is the same as that of Comparative Example 1 (FIG. 2 (a)). However, in Comparative Example 2, the sectional view taken along the line II ′ in FIG. 2A is as shown in FIG. In FIG. 4, parts corresponding to those in FIGS. 1 to 3 are denoted by the same reference numerals. The laminated core of Comparative Example 2 has the laminated core body 10 but is different from the laminated core of the second embodiment in that the patch-like magnetic materials 20 to 27 are not provided.

  In FIG. 4, the magnetic flux 4a flowing in the magnetic material 1a of the foremost layer has a smaller magnetic resistance in the vicinity of the gap 5a than bypassing the upper air region. Flow detour to 1b. Therefore, compared with the magnetic material of another layer, about twice as much magnetic flux flows in the thickness direction from the magnetic material 1a toward the magnetic material 1b. In practice, this means that the magnetic flux density is approximately doubled at that location. Thereby, large eddy current loss occurs in the magnetic material 1b.

(Effect of embodiment)
As described above, the eddy current loss generated when the magnetic flux vertically links in the thin plate magnetic material is proportional to the square of the magnetic flux density. The magnetic flux 4a in the comparative example 2 is all linked to the magnetic material 1b, whereas in the second embodiment, the magnetic flux 4a is branched into two, and the original magnetic flux of about 1/2 is respectively the magnetic material 1b and the patch. Interlinks with the magnetic material 20. When the original magnetic flux density of the magnetic flux 4a is B, the eddy current loss caused by the magnetic flux 4a, the ratio between this embodiment and the comparative example 2, B ^2: becomes 1: B ^2/2 = 2 . That is, in this embodiment, the eddy current loss caused by the magnetic flux 4a can be reduced to about ½ of the comparative example 2. Other effects of the present embodiment are the same as those of the first embodiment.

[Third Embodiment]
(Configuration of the embodiment)
Next, the laminated iron core configuration of the third embodiment of the present invention will be described. The overall appearance of the laminated core of the present embodiment is the same as that of the first embodiment (FIG. 1A). However, in this embodiment, the II ′ cross-sectional view in FIG. 1A is as shown in FIG. In FIG. 5, parts corresponding to those in FIGS. 1 to 4 are denoted by the same reference numerals.

  FIG. 5 shows the cross-sectional shapes of the magnetic materials 1a to 1f from the frontmost layer to the sixth layer. These magnetic materials 1a to 1f are laminated while the abutting locations are alternately changed every three layers to form a three-step step lap joint. And the gap 5a, 5b is formed in each abutting location. A patch-like magnetic material 20 is fixed to the frontmost magnetic material 1a so as to cover the front surface of the gap 5a. When the magnetic flux in the laminated magnetic material is schematically indicated by arrows, magnetic fluxes 4a to 4f in the figure are obtained. Since the magnetic resistance of the gaps 5a to 5f increases, the magnetic flux flowing in each magnetic material is diverted to the other magnetic material. In that case, the magnetic flux may be branched.

  For example, all of the magnetic flux 4 a flowing through the magnetic material 1 a is bypassed via the patch-like magnetic material 20. Further, all of the magnetic flux 4c flowing through the magnetic material 1c bypasses through the magnetic material 1d. On the other hand, about 1/2 of the magnetic flux 4b flowing through the magnetic material 1b flows around the patch-like magnetic material 20 via the magnetic material 1a, and the remaining about 1/2 flows through the magnetic material 1c. Detour to flow.

(Comparative Example 3)
Next, in order to clarify the effect of this embodiment, the structure of the laminated iron core of the comparative example 3 is demonstrated. The overall appearance of the laminated core of Comparative Example 3 is the same as that of Comparative Example 1 (FIG. 2 (a)). However, in Comparative Example 3, a cross-sectional view taken along the line II ′ in FIG. 2A is as shown in FIG. In FIG. 6, parts corresponding to those in FIGS. 1 to 5 are denoted by the same reference numerals. The laminated iron core of Comparative Example 3 has the laminated iron core body 10 but differs from the laminated iron core of the third embodiment in that it does not have the patch-like magnetic materials 20 to 27.

  In FIG. 6, since the magnetic flux 4a flowing in the magnetic material 1a in the foremost layer has a lower magnetic resistance than bypassing the upper air region, all of the magnetic flux 4a passes through the magnetic materials 1b and 1c to form the fourth layer magnetic material. Flow detouring to 1d. For the same reason, all of the magnetic flux 4b flowing in the magnetic material 1b flows around the magnetic material 1d via the magnetic material 1c. Here, considering the magnetic flux flowing in the thickness direction from the magnetic materials 1a, 1b, and 1c toward the magnetic material 1d in the vicinity of the gap 5a, the magnetic flux in the comparative example 3 is about 2 of the magnetic flux in the third embodiment. Double. In practice, this means that the magnetic flux density is approximately doubled at that location. Thereby, a large eddy current loss occurs in the magnetic material 1d and the like.

(Effect of embodiment)
As described above, the eddy current loss due to the magnetic flux flowing in the thickness direction of the magnetic material is proportional to the square of the magnetic flux density. Therefore, in this embodiment, the eddy current loss caused by the magnetic fluxes 4a, 4b, and 4c can be reduced to about ½ that of the third comparative example. Other effects of the present embodiment are the same as those of the first and second embodiments.

[Fourth Embodiment]
Next, with reference to FIG. 7, the structure of the laminated iron core of 4th Embodiment of this invention is demonstrated. FIG. 7 is a perspective view of the laminated iron core according to the present embodiment, and portions corresponding to the respective portions in FIGS. Of the laminated cores of the present embodiment, the laminated core body 10 is the same as that of the first embodiment (FIG. 1A). However, instead of the patch-like magnetic materials 20 to 27 of the first embodiment, the corner areas of the four corners of the laminated core body 10 and the two T-shaped connection areas each cover the entire area. The substantially rectangular patch-like magnetic materials 30 to 35 are fixed.

  Also in this embodiment, the patch-like magnetic materials 30 to 35 are formed by cutting the same material as the magnetic material 1 into a rectangular shape. In addition, a patch-like magnetic material formed in the same manner as the patch-like magnetic materials 30 to 35 is fixed to the last layer (not shown) of the laminated iron core so as to cover the same region. In particular, when attention is paid to the patch-like magnetic materials 31 and 34 in the T-shaped connection region, it can be seen that two gaps are covered by a single patch-like magnetic material.

  Thus, in this embodiment, since the area | region where a some gap exists can be covered with one patch-like magnetic material, compared with 1st Embodiment, reducing the number of patch-like magnetic materials. (Reduced from 8 to 6). Thereby, the man-hour which adheres the patch-like magnetic materials 30-35 can be reduced. Other effects of the present embodiment are the same as those of the first to third embodiments regardless of the number of step lap joints.

[Fifth Embodiment]
Next, with reference to FIG. 8, the laminated core structure of 5th Embodiment of this invention is demonstrated. FIG. 8 is a perspective view of the laminated iron core according to the present embodiment, and parts corresponding to those in FIGS. 1 to 7 are denoted by the same reference numerals. The laminated iron core of the present embodiment is a frame-shaped single-phase laminated iron core, and has a laminated core body 40 configured by laminating the magnetic material 1 while abutting each other. The laminated core body 40 includes magnetic leg portions 40P and 40S and a yoke portion 40Y that crosses these magnetic leg portions and connects the magnetic leg portions to each other at the upper and lower ends, and is formed in a substantially rectangular frame shape. Has been. In any layer, step lap bonding is configured at four abutting locations of the magnetic material 1.

  In the foremost layer of the laminated iron core, patch-like magnetic materials 50 to 53 are fixed so as to cover the front surface of the gap at the abutting portion of the magnetic material 1. A patch-like magnetic material formed in the same manner as the patch-like magnetic materials 50 to 53 is fixed to the magnetic material 1 of the last layer (not shown) so as to cover the rear surface of the gap. As in the first embodiment, the patch-like magnetic materials 50 to 53 are formed by cutting the same material as the magnetic material 1 into a rectangular shape.

  The laminated iron core of this embodiment can be applied to various single-phase stationary electromagnetic devices. For example, when the primary and secondary windings are wound around the magnetic leg portions 40P and 40S, a single-phase transformer is configured. Further, when only one system winding is wound around one of the magnetic leg portions 40P and 40S, a single-phase reactor is configured.

  Similarly to the first embodiment, in this embodiment, the patch-like magnetic materials 50 to 53 are all fixed to the yoke portion 40Y, and the magnetic leg portions 40P, The patch-like magnetic materials 50 to 53 are not fixed to 40S. Therefore, when the winding is wound around the magnetic leg portions 40P and 40S, the patch-like magnetic materials 50 to 53 are not sandwiched, and the adhesion between the magnetic leg portions 40P and 40S and the winding can be increased. Other effects of the present embodiment are the same as those of the first to third embodiments regardless of the number of step lap joints.

[Modification]
The present invention is not limited to the above-described embodiments, and various modifications can be made. The above-described embodiments are illustrated for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of an embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of an embodiment. Further, it is possible to delete a part of the configuration of each embodiment, or to add or replace another configuration. Examples of possible modifications to the above embodiment are as follows.

(1) In the first to third embodiments described above, the example in which the number N of step lap joints is “2”, “1”, “3” has been described, but the number N is “4” or more. There may be. Here, the functions of the patch-like magnetic material 20 and the like when the number N is an even number and when the number N is an odd number will be generally described. First, when the number N is an even number, the patch-like magnetic material has a function of bypassing the magnetic flux flowing in the magnetic material 1 from the outermost layer (frontmost layer and last layer) to the N / 2nd layer to the patch-like magnetic material. Have This also means that at the same time, the magnetic material 1 flowing from the (1 + N / 2) th layer to the Nth layer has a function of bypassing the magnetic material 1 of the (N + 1) th layer.

  When the number N is an odd number, the patch-like magnetic material includes magnetic flux flowing through the magnetic material 1 from the outermost layer (frontmost layer and last layer) to the (N−1) / 2th layer, and (N + 1) / th It has a function of bypassing about 1/2 of the magnetic flux flowing through the two layers of magnetic material 1 to the patch-like magnetic material. At the same time, the remaining magnetic flux (about 1/2) flowing through the magnetic material 1 of the (N + 1) / 2 layer and the magnetic flux flowing through the magnetic material 1 from the (N + 3) / 2 layer to the Nth layer are This also means that the magnetic material 1 of the (N + 1) layer has a function of detouring. Therefore, in any case, Joule loss can be reduced as compared with the case where no patch-like magnetic material is provided.

(2) In the first to third embodiments described above, the abutting locations of the magnetic material 1 are switched alternately for each number N of step lap joints. However, the present invention is not limited to one that alternately switches the abutting locations. For example, the I-I ′ cross section in any of the first to third embodiments may be modified as shown in FIG. 9. In FIG. 9, the abutting locations of the magnetic materials 1a, 1b,..., 1f are periodically changed in a stepped manner of M stages (M = 4 in the illustrated example). Thereby, the width | variety of the step lap joining location 3 becomes long. However, since the patch-like magnetic material 20 only needs to cover the gap 5a appearing in the frontmost magnetic material 1a, the same patch-like magnetic material as in each of the above-described embodiments can be applied.

1,1a-1f Thin plate magnetic material (magnetic material)
3 Step lap joint locations 4a-4f Magnetic flux 5a-5f Gap (abutting location)
DESCRIPTION OF SYMBOLS 10 Laminated iron core main body 10Y Joint part 10U, 10V, 10W Magnetic leg part 20-27 Patch-like magnetic material 30-35 Patch-like magnetic material 40 Laminated iron core main body 40Y Joint part 40P, 40S Magnetic leg part 50-53 Patch-like magnetism material

Claims (10)

A single layer is formed by abutting surfaces in the thickness direction of a plurality of thin plate-like magnetic materials, and a plurality of the single layers are laminated. A laminated core body that is changed for each single layer;
A laminated core comprising: a patch-like magnetic material fixed so as to cover the abutting location at the abutting location in the single layer disposed on the surface of the laminated core body. The abutting portion is substantially linear,
The patch-like magnetic material is formed in a substantially rectangular shape having a long side along the abutting portion and a short side larger than a width of a gap formed in the abutting portion. The laminated iron core according to claim 1. The laminated iron core according to claim 1, wherein the patch-like magnetic material is formed so as to cover a plurality of the abutting locations. The laminated iron core according to claim 1, wherein the patch-like magnetic material is made of the same material as the thin plate-like magnetic material. The laminated core body is formed by changing the contact point in each single layer for each single layer of N layers (N is an even number),
2. The laminated iron core according to claim 1, wherein the patch-like magnetic material has a function of bypassing the magnetic flux flowing through the thin plate-like magnetic material from the outermost layer to the N / 2nd layer to the patch-like magnetic material. . The laminated core body is formed by changing the contact location in each single layer for each single layer of N layers (N is an odd number),
The patch-like magnetic material is approximately equal to the magnetic flux flowing through the thin-plate magnetic material from the outermost layer to the (N−1) / 2th layer and the magnetic flux flowing through the (N + 1) / 2-th thin magnetic material. The laminated iron core according to claim 1, having a function of bypassing 1/2 to the patch-like magnetic material. The laminated core body includes three magnetic leg portions around which three-phase windings are wound, and a yoke that connects the three magnetic leg portions to each other while intersecting the three magnetic leg portions. And having a part,
The patch-like magnetic material is fixed to the yoke portion, and the patch-like magnetic material is not fixed to the magnetic leg portion of the portion that does not intersect the yoke portion. The laminated iron core according to 1. The laminated core body has two magnetic leg portions and a yoke portion that crosses the two magnetic leg portions and couples the two magnetic leg portions to each other, and has a substantially rectangular frame shape. Formed in the
The patch-like magnetic material is fixed to the yoke portion, and the patch-like magnetic material is not fixed to the magnetic leg portion of the portion that does not intersect the yoke portion. The laminated iron core according to 1. The laminated iron core according to claim 4, wherein the thin plate-like magnetic material and the patch-like magnetic material are electromagnetic steel plates. The laminated iron core according to claim 1,
A stationary electromagnetic device comprising: a winding wound around the laminated iron core.

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