JP7143235B2 - Iron core for stationary induction electric machine - Google Patents

Description

The present invention relates to an iron core for a static induction electric machine, and is particularly suitable for those using a magnetic ribbon such as a silicon steel plate or an amorphous magnetic ribbon as part or all of the iron core of a static induction electric machine such as a transformer or a reactor. The present invention relates to an iron core for stationary induction electric appliances.

Energy consumption continued to increase along with global economic growth, reaching 3.3 times in the approximately 50 years from 1965 to 2015.

Silicon steel sheets, which have low loss and high magnetic permeability, are usually used as core materials for transformers. Demand for high-efficiency transformers using amorphous magnetic ribbons (hereinafter referred to as amorphous transformers) is increasing.

The amorphous magnetic ribbon has a higher electrical resistivity than a silicon steel sheet, and a thickness as thin as 1/10, so that eddy current loss is small. In addition, since the amorphous magnetic ribbon is amorphous, domain wall movement is easy and hysteresis loss is small, so the no-load loss that always occurs even when there is no load on the transformer is low. have the advantage of Taking advantage of this advantage, amorphous transformers are attracting attention as a technology that is highly effective in introducing them into distribution networks with low operating load factors.

Until now, transformers using amorphous wound cores have been commercialized as relatively small-capacity transformers up to 6.6 kV from the viewpoint of productivity. On the other hand, in the power distribution system from the power plant to the consumer, looking at the upstream of the power distribution field, most of the special high voltage class transformers exceeding 22 kV have high mechanical strength and can be easily enlarged. A silicon steel plate transformer using a silicon steel plate for an iron core is used.

Therefore, with the increase in size of amorphous transformers, a large energy saving effect can be expected by changing transformers of special high voltage class from silicon steel sheets to amorphous magnetic ribbons.

For example, the transmission loss that occurs in power distribution in Japan is low by global standards, about 5%, but the total annual power generation in Japan is about 1 trillion kWh, and the transmission efficiency is only 0.01%. Even with the improvement, 100 million kWh of electricity can be saved, so it can be seen that the application of highly efficient amorphous transformers is useful.

In addition, it is expected that amorphous transformers with low no-load loss will greatly reduce the environmental burden when applied to renewable energy applications where the output is not constant and standby power consumption during low-load operation is a problem.

When increasing the size of the amorphous wound core, it is necessary to prevent the load from concentrating in one place because thin magnetic ribbons such as amorphous magnetic ribbons are sensitive to stress and fragile. In addition, it is necessary to maintain the strength so that the iron core itself does not buckle against the short-circuit mechanical force that occurs when the windings are short-circuited due to an accident or the like.

For this reason, for example, in Patent Document 1, a metal core case is provided around the outer periphery of an amorphous wound core, and when the entire core is bound, a silicon steel plate core is pressed against the metal core case, and the amorphous core has a It is described that the structure is such that stress is not applied directly. This makes it possible to withstand the short-circuit mechanical force that occurs when the windings are short-circuited.

JP 2018-133352 A

However, unlike the silicon steel sheet, the surface of the amorphous magnetic ribbon is not coated with an insulating material, and insulation is maintained by an oxide film formed on the surface of the amorphous magnetic ribbon.

Therefore, the electric resistance between the inner and outer circumferences of the amorphous wound iron core is small, and when the iron core comes into contact with the metallic iron core case, there is a possibility that the iron core itself will be short-circuited.

Therefore, the core case described in Patent Document 1, which is introduced to protect the amorphous core and strengthen the short-circuit mechanical force of the winding, is made of a highly rigid metal to protect the core. and the metal core case may come into contact with each other, causing a short circuit in the core itself.

As a countermeasure, it is conceivable to cover the metal core case with an insulator such as a pressboard, but the vibration of the core and windings due to the excitation of the transformer may cause the insulator such as the pressboard to shift and break. It is not sufficient as an insulation measure to prevent short circuits.

The present invention has been made in view of the above points, and its object is to prevent electrical short-circuiting even in magnetic thin ribbons such as amorphous magnetic thin ribbons. To provide a high-strength iron core for a stationary induction electric machine.

In order to achieve the above object, an iron core for a stationary induction electric machine according to the present invention comprises: a core main leg into which a winding is inserted; a core side leg arranged in parallel with the core main leg with a predetermined space therebetween; A side leg and a yoke portion connecting the core main leg, at least the core main leg comprising an amorphous wound core and a silicon steel sheet wound core horizontally adjacent to each other, and the amorphous wound core and the silicon steel sheet wound core. It is characterized by comprising a silicon steel laminated core arranged so as to sandwich the

Specifically, the core main leg has a plurality of the amorphous wound cores arranged in the horizontal direction at the central portion thereof in the horizontal cross section, and the silicon steel wound cores are arranged at both horizontal ends of the amorphous wound cores. At least two sets of the amorphous wound core and the silicon steel sheet wound core arranged in this way are arranged in the longitudinal direction in the horizontal cross section of the core main leg, and the amorphous wound core and the silicon The silicon steel sheet laminated core is arranged so as to sandwich the steel sheet wound core from the front-rear direction in the horizontal cross section of the core main leg.

According to the present invention, it is possible to obtain an iron core for a static induction electric machine with high mechanical strength without causing an electrical short circuit even if the iron core is formed of a magnetic ribbon such as an amorphous magnetic ribbon. can.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view showing a single-phase transformer core that is Embodiment 1 of the core for a static induction electric machine of the present invention; It is a horizontal sectional view of the A section of Fig.1 (a). 1 is a diagram showing H-steel adopted for a single-phase transformer core, which is Example 1 of the core for a static induction electric machine of the present invention; FIG. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing a silicon steel laminated core employed in a single-phase transformer core, which is Example 1 of the core for a static induction electric machine of the present invention; BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing an amorphous wound core and a silicon steel sheet wound core that are employed in a single-phase transformer core that is Example 1 of the core for a stationary induction electric machine of the present invention; It is a figure which shows the manufacturing process of the single-phase transformer core which is Example 1 of the core for static induction electric machines of this invention. FIG. 2 is a diagram showing a three-phase five-leg transformer core that is a second embodiment of the core for a static induction electric machine of the present invention; It is a horizontal sectional view of the B section of Fig.3 (a). FIG. 4 is a view showing H steel employed in a three-phase five-leg transformer core, which is Example 2 of the core for a stationary induction electric machine of the present invention; FIG. 2 is a diagram showing a silicon steel plate laminated core employed in a three-phase five-leg transformer core that is a second embodiment of the core for a stationary induction electric machine of the present invention; FIG. 5 is a diagram showing an amorphous wound core and a silicon steel sheet wound core employed in a three-phase five-leg transformer core that is a second embodiment of the core for a stationary induction electric machine of the present invention; FIG. 10 is a diagram showing a three-phase, three-leg transformer core that is a third embodiment of the core for a static induction electric machine of the present invention; It is a horizontal sectional view of the C section of Fig.4 (a). FIG. 10 is a view showing H steel employed in a three-phase, three-leg transformer core that is Example 3 of the core for a stationary induction electric machine of the present invention; FIG. 10 is a diagram showing a silicon steel laminated core employed in a three-phase, three-leg transformer core that is Embodiment 3 of the core for stationary induction electric machine of the present invention; FIG. 3 is a diagram showing an amorphous wound core and a silicon steel sheet wound core employed in a three-phase, three-leg transformer core that is a third embodiment of the core for a stationary induction electric machine of the present invention; FIG. 4 is a diagram showing a three-phase, three-leg transformer core that is a fourth embodiment of the core for a static induction electric machine of the present invention; It is a horizontal sectional view of the D section of Fig.5 (a). It is a horizontal sectional view of the E section of Fig.5 (a). It is a horizontal sectional view of the E' part of Fig.5 (a). FIG. 10 is a view showing H steel employed in a three-phase, three-leg transformer core that is Example 4 of the core for a stationary induction electric machine of the present invention; FIG. 5 is a diagram showing an amorphous wound core and a silicon steel sheet wound core employed in a three-phase, three-leg transformer core that is a fourth embodiment of the core for a stationary induction electric machine according to the present invention; FIG. 5 is a diagram showing an amorphous wound core and a silicon steel sheet wound core employed in a three-phase, three-leg transformer core that is a fourth embodiment of the core for a stationary induction electric machine according to the present invention; It is a figure which shows the manufacturing process of the three-phase three-leg transformer core which is Example 4 of the core for static induction electric machines of this invention.

The iron core for a static induction electric machine according to the present invention will now be described based on the illustrated embodiments. In addition, in each embodiment, the same symbols are used for the same components.

1(a), 1(b), 1(c), 1(d) and 1(e) show a single-phase transformer as an embodiment 1 of a core for a stationary induction machine of the present invention. A core 1 is shown.

As shown in FIG. 1(a), the transformer core 1 of this embodiment includes a core main leg 1A into which a winding 4 (see FIG. 2) is inserted, and a core main leg 1A that is parallel to the core main leg 1A with a predetermined space. The core side leg 1B and the yoke portion 1C connecting the core side leg 1B and the core main leg 1A are provided.

In this embodiment, as shown in FIG. 1(b), the core main leg 1A is an amorphous wound core 1b (see FIG. 1 ( e)) and a silicon steel plate wound core 1c (see FIG. 1(e)), and silicon steel plates arranged so as to sandwich the amorphous wound core 1b and the silicon steel plate wound core 1c from above and below in FIG. 1(b). and a laminated iron core 1a (see FIG. 1(d)).

Specifically, in the core main leg 1A of this embodiment, a plurality of (two in this embodiment) amorphous wound cores 1b are horizontally arranged in the central portion of the horizontal cross section, and the amorphous wound cores 1b A silicon steel plate wound core 1c is arranged at each of both ends in the horizontal direction. 1(b) in the up-and-down direction), and the amorphous wound core 1b and the silicon steel sheet wound core 1c are arranged in this embodiment, and the silicon steel sheets sandwich the amorphous wound core 1b and the silicon steel sheet wound core 1c from the front-rear direction in the horizontal cross section of the core main leg 1A. A laminated iron core 1a is arranged.

The configuration of the core main leg 1A is such that the amorphous wound core 1b disposed in the central portion of the horizontal cross section of the core main leg 1A is surrounded by the silicon steel sheet wound core 1c and the silicon steel sheet core 1a.

In addition, in the horizontal direction (central portion) between the two sets of amorphous wound core 1b and silicon steel wound core 1c, H steel 3 as shown in FIG. 1(c) is inserted to increase the strength of the core. It is

Further, in this embodiment, as shown in FIG. 1B, the longitudinal width L1 of the core main leg 1A of the amorphous wound core 1b in the horizontal cross section is greater than the longitudinal width L2 of the silicon steel wound core 1c. is also short.

Next, a method of manufacturing the transformer core 1 in the first embodiment described above will be described with reference to FIG.

In general, wound cores are made by laminating cut magnetic mortar strips so that the lamination surfaces form a U-shape, inserting windings, and alternating the left and right magnetic strips by a method called butt joint or lap joint. Finally, the iron core main leg with the winding inserted and the yoke are joined to form a ring shape to form a closed magnetic circuit.

First, as shown in FIG. 2(a), a silicon steel core 1a and a silicon steel wound core 1c form a core, and are bound together to hold the shape of the transformer core 1. FIG.

Next, the winding 4 is inserted into the core main leg 1A from below in FIG. b).

Further, the amorphous wound core 1b is inserted into the space surrounded by the silicon steel sheet core 1a and the silicon steel sheet wound core 1c (the portion indicated by the dotted line in FIG. 2(b)) to carry out lapping. (c). Finally, the core main leg 1A with the winding 4 inserted therein and the yoke portion 1C are joined together to form a ring shape to form a closed magnetic circuit, and the transformer core 1 is manufactured.

Effects of the configuration of the transformer core 1 of this embodiment will be described below.

In Patent Literature 1 described above, the core case is used to protect the amorphous wound core. It has a structure that surrounds the core 1b and protects the amorphous wound core 1b.

Therefore, in this embodiment, the core case can be omitted, and the metal portion of the core case and the core do not come into contact with each other, thereby eliminating an electrical short circuit.

In addition, since the rigidity for supporting the transformer core 1 can be secured by the silicon steel plate laminated core 1a and the silicon steel plate wound core 1c, even if a winding short circuit occurs due to a system fault or the like, the short circuit mechanical force It is possible to prevent buckling of the core due to

In addition, since the iron core case of Patent Document 1 has a structure that can withstand the short-circuit mechanical force of the winding, it is made of a thick metal plate, which is one of the factors that increases the weight of the transformer. , By adopting the structure of the transformer core 1 of this embodiment, the core case as in Patent Document 1 can be eliminated, the weight of the transformer can be reduced, and the core case can be eliminated. And the cost can be reduced.

Therefore, according to this embodiment, even if the core is formed of a magnetic ribbon such as an amorphous magnetic ribbon, the transformer core 1 having high mechanical strength can be obtained without causing an electrical short circuit. be able to.

3(a), 3(b), 3(c), 3(d) and 3(e) show a 3-phase 5-leg structure as a second embodiment of the core for a stationary induction machine of the present invention. A transformer core 1 is shown.

In this embodiment shown in the figure, three core main legs 1A have the same structure as in the first embodiment.

That is, in the three core main legs 1A of this embodiment, a plurality of (two in this embodiment) amorphous wound cores 1b are arranged horizontally in the central portion of the horizontal cross section, and the amorphous wound cores 1b are arranged horizontally. A silicon steel plate wound core 1c is arranged at each of the directional end portions, and a set of the amorphous wound core 1b and the silicon steel plate wound core 1c thus arranged is arranged in the front-rear direction (FIG. 3) in the horizontal cross section of the core main leg 1A. In the vertical direction of (b)), in this embodiment, two sets of silicon steel sheets are arranged so as to sandwich the amorphous wound core 1b and the silicon steel sheet wound core 1c from the front and back direction in the horizontal cross section of the core main leg 1A. A laminated iron core 1a is arranged.

In the configuration of the core main leg 1A of the present embodiment, as in the first embodiment, the amorphous wound core 1b disposed in the central portion of the horizontal cross-section of the core main leg 1A is composed of the silicon steel sheet wound core 1c and the silicon steel sheet core 1c. This is the configuration enclosed by 1a.

Also in the present embodiment, in order to increase the strength of the core, an H (H) as shown in FIG. A steel 3 is inserted.

Furthermore, in this embodiment, as shown in FIG. 3B, the longitudinal width L1 of the core main leg 1A of the amorphous wound core 1b in the horizontal cross section is greater than the longitudinal width L2 of the silicon steel wound core 1c. is also formed short.

Even with the three-phase five-leg transformer core 1 of this embodiment, the same effect as in the first embodiment can be obtained.

4(a), 4(b), 4(c), 4(d) and 4(e) show a three-phase three-legged core as a third embodiment of the core for stationary induction electric machine of the present invention. A transformer core 1 is shown.

In this embodiment shown in the figure, one core main leg 1A and two core side legs 1B have the same structure as in the first embodiment.

That is, in the core main leg 1A and the two core side legs 1B of this embodiment, a plurality of (two in this embodiment) amorphous wound cores 1b are arranged horizontally in the central portion of the horizontal cross section thereof. , a silicon steel plate wound core 1c is arranged at both ends of the amorphous wound core 1b in the horizontal direction. In this embodiment, two sets of the amorphous wound core 1b and the silicon steel wound core 1c are arranged in the front-rear direction (vertical direction in FIG. 4(b)) in the horizontal cross section of the leg 1B. The silicon steel plate core 1a is arranged so as to sandwich the core-side leg 1B from the front-rear direction in the horizontal cross-section.

The structure of one core main leg 1A and two core side legs 1B of this embodiment is also similar to the first embodiment, and the amorphous windings are arranged in the center of the horizontal cross section of the core main leg 1A and the core side leg 1B. A core 1b is surrounded by a silicon steel sheet wound core 1c and a silicon steel sheet laminated core 1a.

Also, in this embodiment, one core main leg 1A and two core side legs 1B have a core strength in the horizontal direction between the two sets of amorphous wound core 1b and silicon steel sheet wound core 1c (central portion). In order to increase the H steel 3 as shown in FIG. 4(c) is inserted.

Further, in the present embodiment as well, one core main leg 1A and two core side legs 1B are such that the width L1 in the horizontal cross section of the core main leg 1A and the core side leg 1B of the amorphous wound core 1b is equal to the silicon steel plate. It is formed shorter than the width L2 of the wound core 1c in the front-rear direction.

Even with the three-phase, three-leg transformer core 1 of this embodiment, the same effect as in the first embodiment can be obtained.

5(a), 5(b), 5(c), 5(d), 5(e), 5(f) and 5(g) show the stationary induction electric appliance of the present invention. As Example 4 of the core, a three-phase three-leg transformer core 1 obtained by improving the three-phase three-leg transformer core 1 of Example 3 is shown.

In the present embodiment shown in the figure, the outermost silicon steel sheet wound core 1c of the core side leg 1B is changed to a silicon steel sheet laminated core 1a' in contrast to the transformer core 1 of the third embodiment, thereby forming a three-phase three-leg transformer. It constitutes a transformer core 1 .

That is, in the transformer core 1 of this embodiment, as shown in FIG. The silicon steel plate wound core 1c is arranged at both ends of the wound core 1b in the horizontal direction. In this embodiment, two sets are arranged (in the vertical direction in FIG. 5(b)), and the amorphous wound core 1b and the silicon steel sheet wound core 1c are sandwiched from the front-rear direction in the horizontal cross section of the core main leg 1A. A silicon steel sheet core 1a is arranged.

On the other hand, as shown in FIGS. 5(c) and 5(d), the core-side leg 1B has a plurality of amorphous wound cores 1b arranged horizontally in the central portion of the horizontal cross section, and the amorphous wound cores 1b A silicon steel sheet wound core 1c is arranged at the horizontal inner end, and another silicon steel sheet wound core 1a' is arranged at the horizontal outer end of the amorphous wound core 1b. A set of amorphous wound cores thus arranged. 1b, the silicon steel sheet wound core 1c, and another silicon steel sheet laminated core 1a' are arranged in the longitudinal direction (the vertical direction in FIGS. 5(c) and 5(d)) in the horizontal cross section of the core-side leg 1B in this embodiment. 2, the amorphous wound core 1b, the silicon steel sheet wound core 1c, and another silicon steel sheet wound core 1a' are arranged in the front-rear direction (FIGS. 5(c) and 5( The silicon steel sheet core 1a is arranged so as to sandwich from the vertical direction of d).

Further, in this embodiment, the core main leg 1A is arranged horizontally between the two sets of amorphous wound core 1b and silicon steel wound core 1c (central portion) in order to increase the strength of the core as shown in FIG. ) is inserted, and on the other hand, in the horizontal direction (central part) between two sets of amorphous wound core 1b, silicon steel plate wound core 1c, and another silicon steel plate laminated core 1a', a core In order to increase the strength of the H steel 3 as shown in FIG. 5(c) is inserted.

Furthermore, in this embodiment, the width L1 in the horizontal cross section of the core main leg 1A and the core side leg 1B of the amorphous wound core 1b is formed shorter than the longitudinal width L2 of the silicon steel wound core 1c. there is

Next, a method for manufacturing the transformer core 1 in the fourth embodiment described above will be described with reference to FIG.

First, as shown in FIG. 6(a), a silicon steel core 1a and a silicon steel wound core 1c form a core, and are bound together to hold the shape of the transformer core 1. As shown in FIG.

Next, the winding 4 is inserted into the core main leg 1A from below in FIG. b).

Further, the amorphous wound core 1b is inserted into the space surrounded by the silicon steel sheet core 1a and the silicon steel sheet wound core 1c (the portion indicated by the dotted line in FIG. 6(b)) to carry out the lapping operation. (c). Finally, the transformer core 1 is manufactured by inserting the silicon steel plate core 1a onto the outer periphery of the amorphous wound core 1b.

By adopting such a structure of the present embodiment, in Patent Document 1 described above, the core case is used to protect the amorphous wound core. The leg 1A has a structure in which the amorphous wound core 1b is surrounded by the silicon steel sheet core 1a and the silicon steel sheet wound core 1c to protect the amorphous wound core 1b. The amorphous wound core 1b is surrounded by the wound core 1c and another silicon steel plate core 1a' to protect the amorphous wound core 1b.

Therefore, in this embodiment, the core case can be omitted, and the metal portion of the core case and the core do not come into contact with each other, thereby eliminating an electrical short circuit.

Further, the rigidity for supporting the transformer core 1 can be ensured by the silicon steel sheet core 1a and the silicon steel sheet wound core 1c in the core main leg 1A, and by the silicon steel sheet core 1a and the silicon steel sheet core 1c in the core side leg 1B. Since the silicon steel sheet wound core 1c and another silicon steel sheet laminated core 1a' can be secured, buckling of the core due to the short circuit mechanical force can be prevented even if a winding short circuit occurs due to a system accident or the like.

In addition, since the iron core case of Patent Document 1 has a structure that can withstand the short-circuit mechanical force of the winding, it is made of a thick metal plate, which is one of the factors that increases the weight of the transformer. , By adopting the structure of the transformer core 1 of this embodiment, the core case as in Patent Document 1 can be eliminated, the weight of the transformer can be reduced, and the core case can be eliminated. and the cost can be reduced.

Therefore, according to this embodiment, even if the core is formed of a magnetic ribbon such as an amorphous magnetic ribbon, the transformer core 1 having high mechanical strength can be obtained without causing an electrical short circuit. be able to.

It should be noted that the present invention is not limited to the above-described embodiments, and includes various modifications. For example, the above-described embodiments have been described in detail to facilitate understanding of the present invention, and are not necessarily limited to those having all the described configurations. Also, it is possible to replace part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. Moreover, it is possible to add, delete, or replace a part of the configuration of each embodiment with another configuration.

DESCRIPTION OF SYMBOLS 1... Transformer core, 1A... Core main leg, 1B... Core side leg, 1C... Yoke part, 1a... Silicon steel plate core, 1a'... Another silicon steel plate core, 1b... Amorphous wound core, 1c... Silicon steel plate Wound iron core, 2... Iron core support fitting, 3... H steel, 4... Winding.

Claims (8)

A core main leg into which windings are inserted, a core side leg arranged parallel to the core main leg with a predetermined space, and a yoke portion connecting the core side leg and the core main leg,
At least the core main leg comprises an amorphous wound core and a silicon steel wound core arranged horizontally adjacent to each other, and a silicon steel laminated core arranged to sandwich the amorphous wound core and the silicon steel wound iron core. An iron core for a stationary induction electric machine characterized by: The iron core for a stationary induction electric appliance according to claim 1,
The core main leg has a plurality of amorphous wound cores arranged in the horizontal direction at the central portion of the horizontal cross section, and the silicon steel wound cores arranged at both ends of the amorphous wound core in the horizontal direction. At least two sets of the amorphous wound core and the silicon steel sheet wound core are arranged in the longitudinal direction in the horizontal cross section of the core main leg, and the amorphous wound core and the silicon steel sheet wound core are arranged, An iron core for a stationary induction electric machine, wherein the silicon steel plate-laminated iron core is arranged so as to sandwich the iron core main leg from the front-rear direction in a horizontal cross-section. The iron core for a stationary induction electric appliance according to claim 2,
An iron core for a stationary induction electric machine, wherein the amorphous wound iron core disposed in the center of the horizontal cross section of the iron core main leg is surrounded by the silicon steel sheet wound iron core and the silicon steel sheet laminated iron core. The iron core for a stationary induction electric appliance according to claim 2 or 3,
An iron core for a static induction electric machine, characterized in that an H-beam is arranged horizontally between two pairs of the amorphous wound iron core and the silicon steel wound iron core. The iron core for a stationary induction electric machine according to any one of claims 1 to 4,
An iron core for a stationary induction electric machine, wherein the width in the longitudinal direction of the main leg of the amorphous wound iron core in the horizontal cross section is shorter than the width in the longitudinal direction of the silicon steel wound iron core. The iron core for a stationary induction electric machine according to any one of claims 1 to 5,
A core for a static induction electric machine, wherein the core for a static induction electric machine is any one of a single-phase core, a three-phase three-leg core, and a three-phase five-leg core. The iron core for a stationary induction electric appliance according to claim 6,
The three-phase three-legged core has a plurality of core main legs and core side legs arranged horizontally in a central portion in a horizontal cross section, and a plurality of amorphous wound cores are horizontally arranged at both ends of the amorphous wound core in the horizontal direction. The silicon steel sheet wound core is arranged, and at least two sets of the amorphous wound core and the silicon steel sheet wound core thus arranged are arranged in the longitudinal direction of the horizontal cross section of the core main leg and the core side leg. and the silicon steel sheet laminated core is arranged so as to sandwich the amorphous wound core and the silicon steel sheet wound core from the front-rear direction in the horizontal cross section of the core main leg and the core side leg;
Alternatively, the core main leg has a plurality of the amorphous wound cores arranged in the horizontal direction at the central portion in the horizontal cross section, and the silicon steel wound cores are arranged at both ends of the amorphous wound core in the horizontal direction. At least two sets of the amorphous wound core and the silicon steel sheet wound core are arranged in the longitudinal direction in the horizontal cross section of the core main leg, and the amorphous wound core and the silicon steel sheet wound core are arranged, The silicon steel laminated core is arranged so as to sandwich the core main leg from the front-rear direction in the horizontal cross section,
On the other hand, the core-side leg has a plurality of the amorphous wound cores arranged in the horizontal direction at the central portion in the horizontal cross section, and the silicon steel sheet wound core is arranged at the horizontal inner end portion of the amorphous wound cores. Another silicon steel plate laminated core is arranged at a horizontal outer end portion of the amorphous wound core, and a set of the amorphous wound core and the silicon steel plate wound core arranged in this way, and the another silicon steel plate laminated core are arranged as described above. At least two sets are arranged in the longitudinal direction in the horizontal cross section of the core side leg, and the amorphous wound core, the silicon steel sheet wound core, and the another silicon steel sheet laminated core are arranged in the longitudinal direction in the horizontal cross section of the core side leg. An iron core for a stationary induction electric machine, wherein the silicon steel sheet-laminated iron cores are arranged so as to be sandwiched between them. The iron core for a stationary induction electric appliance according to claim 6,
In the three-phase five-legged core, the core main leg has a plurality of the amorphous wound cores arranged horizontally in the central portion of the horizontal cross section, and the silicon steel wound cores are arranged at both ends of the amorphous wound core in the horizontal direction. are arranged, and at least two sets of the amorphous wound core and the silicon steel sheet wound core arranged in this way are arranged in the front-rear direction in the horizontal cross section of the core main leg, and the amorphous wound core and An iron core for a stationary induction electric machine, wherein the silicon steel sheet laminated core is arranged so as to sandwich the silicon steel sheet wound core from the front and back direction in a horizontal cross section of the core main leg.

Images