JP2002208518A - Stationary induction electromagnetic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stationary induction electromagnetic apparatus which is restrained from increasing in the amount of electromagnetic steel plate used, has a small power loss, is capable of saving resources, produces less noises, and has no adverse effect on the environment. SOLUTION: Electromagnetic steel plates of different lengths are laminated into a magnetic material 6. The magnetic material 6 is arranged on the yoke of a three-phase wound core 1, so that a magnetic flux flowing through the yoke from the leg of the three-phase wound core 1 is made to flow through not only the three-phase wound core 1 but also the magnetic material 6. The magnetic flux is reduced in density at the yoke, so that the iron loss and noises of this stationary induction electromagnetic apparatus can be made smaller than those in a case of dispensing with the magnetic material 6. Therefore, the electromagnetic steel plate can be more restrained from increasing in the number of turns, width, weight, and dimensions than usual so as to realize a stationary induction electromagnetic apparatus which is lighter, capable of more saving resources, has a smaller iron loss, produces less noises, and has less adverse effect on the environment than usual.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stationary induction electromagnetic device such as a transformer and a reactor.

[0002]

2. Description of the Related Art In recent years, awareness of environmental issues has increased. Environmental problems include energy saving and noise problems, and static induction electromagnetic devices require low loss and low noise of the devices.

[0003] A transformer, which is a conventional stationary induction electromagnetic device, will be described below.

FIG. 18 shows a schematic configuration of a conventional transformer.

In FIG. 18, a transformer 101 includes a first inner winding core 102 formed by winding and laminating an electromagnetic steel sheet and a second inner winding core 102.
, A three-phase wound core 106 including an inner wound core 103 and an outer wound core 104, and a coil 105 wound with a conductor.

In the transformer 101 configured as described above, when a voltage is applied to the coil 105, an exciting current flows through the coil 105, and a magnetic flux flows through the three-phase wound core 106 by the exciting current. This magnetic flux causes the three-phase winding core 106 to
Loss called iron loss such as hysteresis loss and eddy current loss occurs, and noise is generated by magnetostriction which is expansion and contraction of the electromagnetic steel sheet due to the magnetic flux. Then, the loss and the noise increase as the magnetic flux density of the three-phase wound core 106 increases.

Conventionally, as for loss and noise, the cross-sectional area of the entire three-phase wound iron core 106 has been increased mainly by increasing the number of turns of the magnetic steel sheet or using a wider magnetic steel sheet to reduce the magnetic flux. Loss and noise were reduced by reducing the density.

[0008]

The above-mentioned conventional transformer 10
In the three-phase core 106, if the number of turns of the electromagnetic steel sheet is increased or a wider electromagnetic steel sheet is used to reduce the magnetic flux density, the size and weight of the yoke and legs of the three-phase core 106 are reduced. Increase. Therefore, increasing the size is contrary to saving space and resources, whereas increasing the weight makes it difficult to convey and the like.

In addition, there has been a problem with respect to the environment, such as an increase in the consumption of resources and an increase in the consumption of energy for manufacturing the material due to an increase in the materials used.

An object of the present invention is to solve the above-mentioned problems, and to provide an inductive electromagnetic device which suppresses an increase in the amount of magnetic steel sheets used, and which is low-loss, resource-saving, low-noise and environmentally friendly. .

[0011]

In order to achieve the above object, a first stationary induction electromagnetic device of the present invention is a three-stage stationary induction electromagnetic device comprising two inner wound cores and one outer wound iron core laminated with electromagnetic steel sheets. A three-phase wound core and a magnetic material arranged in the stacking direction of the yoke portion of the three-phase wound core.

Further, a second stationary induction electromagnetic device of the present invention is the first stationary induction electromagnetic device, wherein the magnetic material is disposed on a three-phase wound core.

A third stationary induction electromagnetic device according to the present invention is the first stationary induction electromagnetic device according to the first stationary induction electromagnetic device, wherein the magnetic material has rigidity and the outer peripheral surface of the inner wound core and the inner peripheral surface of the outer wound core are different from each other. It is arranged in between.

According to a fourth stationary induction electromagnetic device of the present invention, in the first stationary induction electromagnetic device, the magnetic material is disposed on a flat portion of the inner peripheral surface of the yoke portion of the inner winding core. .

According to a fifth stationary induction electromagnetic device of the present invention, in the first stationary induction electromagnetic device, the magnetic material is disposed along an inner peripheral surface of the yoke including at least a corner of the inner core. It was done.

Further, a sixth stationary induction electromagnetic device of the present invention is a three-phase wound iron core comprising two inner wound iron cores and one outer wound iron core laminated with electromagnetic steel sheets, and a joint of the three-phase wound iron core. And a magnetic material disposed on the side surface of the iron part.

According to a seventh stationary induction electromagnetic device of the present invention, in the sixth stationary induction electromagnetic device, the magnetic material has an end inclined in a direction along the yoke.

An eighth stationary induction electromagnetic device according to the present invention is any one of the first to seventh stationary induction electromagnetic devices, wherein the magnetic material is a laminate of electromagnetic steel plates.

According to a ninth stationary induction electromagnetic device of the present invention, in any one of the first to eighth stationary induction electromagnetic devices, the magnetic material has a magnetic permeability greater than that of an electromagnetic steel plate forming the wound core. It was done.

A tenth stationary induction electromagnetic device according to the present invention is the ninth stationary induction electromagnetic device, wherein the magnetic material is ferrite or permalloy.

An eleventh stationary induction electromagnetic device according to the present invention is a three-phase wound core comprising two inner wound cores and one outer wound core laminated with electromagnetic steel sheets, wherein the three-phase wound core is provided. The width dimension of at least a part of the yoke is larger than the width dimension of the legs of the three-phase wound core.

According to a twelfth stationary induction electromagnetic device of the present invention, in the tenth stationary induction electromagnetic device, an end in a direction along a yoke portion larger than the width of the leg portion is inclined.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to a first stationary induction electromagnetic device of the present invention, a three-phase wound core composed of two inner wound cores and one outer wound iron core laminated with electromagnetic steel sheets; With magnetic material arranged in the stacking direction of the yoke part of the wound core,
The magnetic flux passing through the legs flows into the yoke section where the magnetic material is arranged and the magnetic material arranged in the yoke section, and the magnetic flux density of the yoke section where the magnetic material is arranged is reduced and increases with the increase of the magnetic flux density It has the effect of reducing loss and noise.

According to the second stationary induction electromagnetic device of the present invention, in the first stationary induction electromagnetic device, the magnetic material is disposed on the three-phase wound core, and the magnetic flux passing through the leg portion is provided. Flows through the magnetic material disposed on the three-phase wound core, and reduces the magnetic flux density of the three-phase wound core provided with the magnetic material. .

According to the third stationary induction electromagnetic device of the present invention, in the first stationary induction electromagnetic device, the magnetic material has rigidity, and the outer peripheral surface of the inner core and the inner peripheral surface of the outer core. This reduces the slack in the magnetic steel sheet in the yoke section, and the magnetic flux passing through the legs flows into the yoke section where the magnetic material is arranged and the magnetic material arranged in the yoke section. The magnetic flux density of the yoke portion where the material is arranged is reduced. Therefore, the first
It has the effect of further reducing the loss and noise as compared with the stationary induction electromagnetic device.

According to the fourth stationary induction electromagnetic device of the present invention, in the first stationary induction electromagnetic device, the magnetic material is disposed on the flat portion of the inner peripheral surface of the yoke portion of the inner core.
The inner side of the wound core has a shorter magnetic path length, and has a smaller magnetic resistance in proportion to the magnetic path length. And since the magnetic permeability decreases as the magnetic flux density increases, it becomes easier for the magnetic flux to flow through the magnetic material when it is arranged on the window side of the yoke part than when the magnetic material is arranged outside the yoke part, and the leg part The magnetic flux passing through the yoke portion on which the magnetic material is disposed and the magnetic material disposed on the yoke portion flows, and the magnetic flux density of the yoke portion on which the magnetic material is disposed is reduced. Therefore, it has the effect of further reducing loss and noise than the first stationary induction electromagnetic device.

Further, according to the fifth stationary induction electromagnetic device of the present invention, in the first stationary induction electromagnetic device, the magnetic material extends along at least the inner peripheral surface of the yoke portion including the corners of the inner core. Because the magnetic flux flowing from the legs to the yoke section flows more directly from the legs to the magnetic material than to the magnetic material arranged from the yoke section to the yoke section, the magnetic flux It flows more easily through the magnetic material than the third stationary induction electromagnetic device, and the magnetic flux density of the yoke portion provided with the magnetic material is reduced. Therefore, the first,
It has the function of further reducing loss and noise than the fourth stationary induction electromagnetic device.

According to the sixth stationary induction electromagnetic device of the present invention, a three-phase wound core composed of two inner wound cores and one outer wound core laminated with electromagnetic steel sheets, and the three-phase wound core is provided. In addition to the same operation as the first stationary induction electromagnetic device, when there is an overlapping portion of the electromagnetic steel sheet in the yoke portion where the magnetic material is arranged, Since the laminating surface contains an air layer, the magnetic resistance increases.Therefore, compared to the flow of magnetic flux in the laminating direction, only the contact surface between the yoke and the magnetic material contains the air layer in the horizontal direction. Low resistance and large flow of magnetic flux. Therefore, the magnetic flux easily flows from the yoke to the magnetic material arranged on the side surface, and the magnetic flux density of the yoke where the magnetic material is arranged is reduced. Therefore, in this case, the first and second stationary induction electromagnetic devices have an effect of further reducing loss and noise.

According to the seventh stationary induction electromagnetic device of the present invention, in the sixth stationary induction electromagnetic device, since the magnetic material has an inclined end in the direction along the yoke portion, Since the magnetic flux flowing from the portion to the magnetic material does not enter the magnetic material at right angles, even if the end of the magnetic material is inclined, it hardly affects the flow of the magnetic flux, and is less than the sixth stationary induction electromagnetic device. By realizing resource saving by using materials,
The magnetic flux density of the yoke portion is reduced as in the stationary induction electromagnetic device. Therefore, it has the effect of further reducing the loss and noise as compared with the first and third stationary induction electromagnetic devices.

According to the eighth stationary induction electromagnetic device of the present invention, in any one of the first to seventh stationary induction electromagnetic devices, in addition to the respective functions, the magnetic material is a laminate of electromagnetic steel plates. Therefore, the thickness of the magnetic material can be easily adjusted to a desired thickness, and by increasing or decreasing the number of laminated electromagnetic steel sheets, it is possible to configure an optimal iron core in consideration of characteristics such as iron loss and economy. it can.

According to the ninth stationary induction electromagnetic device of the present invention, in any one of the first to eighth stationary induction electromagnetic devices, the magnetic material has a magnetic permeability that is the same as the magnetic permeability of the electromagnetic steel sheet forming the wound core. Because the magnetic permeability of the magnetic material is large, the magnetic flux in the yoke portion flows more easily through the magnetic material, and the magnetic flux from the legs flows through the yoke portion and the magnetic material, so that the magnetic material is arranged. The magnetic flux density of the part is reduced. for that reason,
It has the effect of further reducing loss and noise than the first to eighth static induction electromagnetic devices.

According to the tenth stationary induction electromagnetic device of the present invention, in the ninth stationary induction electromagnetic device, the magnetic material is ferrite or permalloy, so that the magnetic permeability is larger than that of the electromagnetic steel plate and the magnetic flux is more easily generated. The magnetic flux flows from the magnetic material, and the magnetic flux from the leg portion flows through the yoke portion and the magnetic material, so that the magnetic flux density of the yoke portion provided with the magnetic material is reduced. for that reason,
The loss and noise can be further reduced as compared with the eighth stationary induction electromagnetic device.

According to an eleventh stationary induction electromagnetic device of the present invention, there is provided a three-phase wound core comprising two inner wound cores and one outer wound core laminated with electromagnetic steel sheets, Since the width of at least a part of the yoke portion of the core is larger than the width of the legs of the three-phase core, the magnetic flux flowing from the legs to the yoke also flows to the portion where the width is wide, The magnetic flux density is reduced in the yoke portion, and iron loss and noise are reduced as compared with a case where a magnetic material is disposed on a wound core formed by winding a magnetic steel sheet having a constant width.

According to the twelfth static induction electromagnetic device of the present invention, in the tenth static induction electromagnetic device, the end in the direction along the yoke larger than the width of the leg is inclined, Since magnetic flux flowing from a portion having the same width as the leg portion of the iron portion to a portion wider than the leg portion does not enter at a right angle with respect to the portion wider than the leg portion, the angle of the magnetic steel sheet constituting the yoke portion is Even if the part is tilted, it hardly affects the flow of magnetic flux, realizes resource saving with less material than the tenth static induction electromagnetic device, and, like the tenth static induction electromagnetic device, reduces the yoke portion. Reduce magnetic flux density. Therefore, the first to ninth
It has the effect of further reducing the loss and noise as compared with the stationary induction electromagnetic device.

Hereinafter, description will be made with reference to the drawings.

(Embodiment 1) FIGS. 1 and 2 show a schematic perspective view and a schematic front view of a transformer of a stationary induction electromagnetic device according to Embodiment 1 of the present invention.

In FIGS. 1 and 2, reference numeral 1 denotes a three-phase wound core laminated by winding an electromagnetic steel sheet, 2 denotes a first inner wound core constituting the three-phase wound core 1, and 3 denotes a three-phase wound core. The outer winding core 4 is located outside the first inner winding core 2 and the second inner winding core 3 and forms the three-phase winding core 1. A coil for passing the generated current is wound around the leg portion of the three-phase wound core 1, and 6 is a magnetic material disposed on the yoke portion above the three-phase wound core 1.

Here, the yoke portion is the first inner wound core 2
And a portion where the coil 5 is not wound when the corners of the second inner core 3 and the outer core 4 are separated at an angle of 45 degrees in the outer peripheral direction, and a portion where the coil 5 is wound. Is called a leg.

In the first embodiment, the magnetic material 6 has the same width as that of the electromagnetic steel plate of the three-phase wound core 1 and has the same length as the yoke on the outer peripheral surface of the upper yoke of the three-phase wound core 1. The length in the direction along the yoke is shortened in order, and is laminated in a trapezoidal shape.

The stationary induction electromagnetic device configured as described above will be described. When a voltage is applied to the coil 5, an exciting current flows through the coil 5, and the exciting current causes the three-phase wound core 1 to move.
The magnetic flux passes through the inside of the. Due to the magnetic flux, the three-phase core 1
In this case, iron loss including hysteresis loss and eddy current loss occurs, and vibration is generated by magnetostriction, which is expansion and contraction of an electromagnetic steel plate, which is a main cause of transformer noise, and noise is generated. These iron loss and noise increase as the magnetic flux density of the three-phase wound core 1 increases.

For example, in the case of a grain-oriented electrical steel sheet, the magnetic flux density is generally set to 1.7 T in consideration of cost, magnetization characteristics and the like.
(Tessler), because the magnetic flux density is near 1.7T, and the magnetic flux density increases and the amount of increase in iron loss increases.

In the above configuration, since the magnetic material 6 formed by laminating electromagnetic steel sheets having different lengths in the direction along the yoke portion is disposed on the yoke portion above the three-phase wound core 1, the magnetic material 6 is joined from the leg portion. The magnetic flux flowing to the iron part flows not only to the three-phase wound core 1 but also to the magnetic material 6, and the magnetic flux density is reduced in the yoke portion where the magnetic material 6 is arranged. Iron loss and noise that increase due to the increase are reduced.

As described above, by arranging the magnetic material 6 in which electromagnetic steel sheets having different lengths are laminated on the yoke of the three-phase wound core 1, the magnetic flux density of the yoke where the magnetic material 6 is arranged is reduced. Although the total weight of the magnetic steel sheet increases by the weight of the magnetic material 6, the magnetic flux density of the grain-oriented magnetic steel sheet is generally 1.7.
In the vicinity of T, there is a large change in iron loss due to an increase or decrease in magnetic flux density, and the amount of decrease in iron loss due to a decrease in magnetic flux density is large. Can be reduced, and the iron loss of the entire iron core when viewed as a whole of the three-phase wound core 1 including the magnetic material 6 can be reduced.

Since iron loss is a loss that always occurs when a voltage is applied to a device irrespective of a load, it is very important to reduce the iron loss for energy saving of the device.

The three-phase wound iron core 1 is formed by winding one electromagnetic steel sheet, partially overlapping the yoke portion, and winding and stacking a plurality of electromagnetic steel sheets in the same manner. Are mainly generated at the seam where the magnetic steel sheet is wound and laminated, where the sag is likely to occur.By reducing the magnetic flux density of this seam part, the magnetostriction, which is the expansion and contraction of the electromagnetic steel sheet, , And the noise of the entire three-phase wound core 1 can be reduced.

As described above, by arranging the magnetic material 6 formed by laminating electromagnetic steel sheets having different lengths on the yoke on the upper outer peripheral surface of the three-phase wound core 1, the magnetic flux density is reduced as in the related art. In order to increase the cross-sectional area of all the legs and the yoke of the iron core by increasing the number of turns of the electromagnetic steel sheet constituting the iron core or by using a wider electromagnetic steel sheet, The size of the coil 5 wound around the distance required for insulation and cooling becomes large,
Compared to the case where the material used increases, only the magnetic material is added without changing the specifications of the three-phase wound iron core 1 and the coil 5, so that the magnetic material is lighter and resource-saving than the conventional one, and no magnetic material is arranged. An environment-friendly stationary induction electromagnetic device with less iron loss and lower noise than in the case can be realized.

When assembling the transformer, the three-phase core 1
If the noise is loud, re-annealing and reassembly of the iron core may be necessary to reduce the noise, and extra energy consumption and man-hours due to re-annealing were required. By doing so, low noise can be realized and energy can be saved.

The magnetic material 6 may be formed by laminating electromagnetic steel sheets having the same length. However, when the magnetic flux flows from the legs of the three-phase wound core 1 to the yoke and the magnetic material 6, the magnetic material 6 Since it does not flow at an angle close to a right angle, by laminating electromagnetic steel plates of decreasing length in order from the yoke part side and inclining the end of the magnetic material 6, the outer shape is approximated by a streamlined type,
A similar effect can be obtained with less material than when electromagnetic steel sheets having the same length are laminated, and a static induction electromagnetic device that is resource-saving and environmentally friendly can be realized.

In the first embodiment, the magnetic material 6 is formed by laminating electromagnetic steel sheets having different lengths, and has a three-phase wound core 1 having a width of three phases.
Although the length of the part in contact with the yoke part with the same width as that of the electromagnetic steel sheet is the same as the length of the straight part of the yoke part, even if the width and the length of the part in contact with the yoke part are different, the contact area and There is a difference depending on the stack thickness, and the smaller these are, the lower the effect tends to be. However, the effect of low loss and low noise can be obtained.

Further, in the first embodiment, the case where the electromagnetic steel sheets arranged in the yoke portion of the three-phase wound core 1 are laminated in contact with the three-phase wound core 1 in the same direction as the lamination direction has been described. The magnetic material 6 arranged on the outer periphery of the yoke portion of the three-phase wound core 1 is perpendicular to the lamination direction of the electromagnetic steel sheets constituting the three-phase wound core 1, and is formed of the electromagnetic steel sheet constituting the three-phase wound core 1. By forming a grain-oriented electrical steel sheet laminated in contact with the width direction in the outer periphery of the yoke portion, the three-phase wound core is transferred from the yoke portion of the three-phase wound core 1 on which the magnetic material 6 is arranged to the magnetic material 6 again. In comparison with the case where the directional magnetic steel sheet is laminated in the same direction as the lamination direction of the three-phase wound iron core 1 with respect to the flow direction of the magnetic flux returning to 1, the space formed by the lamination of the electromagnetic steel sheets has a three-phase wound iron core 1. And the magnetic resistance is reduced because there are few spaces, and the same as the magnetic steel sheet of the three-phase wound iron core 1. It is possible to obtain a larger low loss and low noise effects than the case of stacking the direction.

Here, although the effect differs depending on the length,
Regardless of the length of the grain-oriented electrical steel sheet, whether it is different or the same, the effect of low loss and low noise can be obtained.

(Embodiment 2) FIG. 3 is a schematic configuration diagram of a transformer as a stationary induction electromagnetic device according to Embodiment 2 of the present invention. In FIG. 3, the same components as those in the first embodiment are denoted by the same reference numerals, detailed description thereof will be omitted, and different portions will be mainly described below.

The difference from the structure of the first embodiment is that the first inner core 2 and the second inner core 3 and the outer core 4 are between layers of the magnetic steel sheets constituting the three-phase core 1. This is the point that the magnetic material 21 having rigidity is disposed on the surface.

A transformer as a stationary induction electromagnetic device configured as described above will be described. When a voltage is applied to the coil 5, an exciting current flows through the coil 5, and a magnetic flux flows inside the three-phase wound core 1 by the exciting current. The magnetic flux generates iron loss and noise in the three-phase wound core 1.

Here, since the magnetic material 21 is arranged between the first inner core 2 and the second inner core 3 and the outer core 4, the magnetic flux flowing from the leg to the yoke is provided. Flows not only in the three-phase wound core 1 but also in the magnetic material 21, the magnetic flux density is reduced in the yoke portion, and iron loss and noise are reduced as compared with the case where the magnetic material 21 is not provided.

As described above, by arranging the magnetic material 21 having rigidity between the first inner core 2 and the second inner core 3 and the outer core 4, the magnetic flux density of the yoke portion can be improved. To reduce weight and size by increasing the number of turns and increasing the width of the electromagnetic steel sheet compared to the conventional type. It is possible to realize an environmentally friendly stationary induction electromagnetic device iron core having a low temperature.

Conventionally, the triangular void portion 14 of the yoke portion composed of the first inner core 2, the second inner core 3, and the outer core 4 is mainly formed of the outer core 4. This is a place where sagging is likely to occur. This sagging deteriorates the magnetic properties of the magnetic steel sheet and increases the loss, and the slack tends to cause chattering of the magnetic steel sheet, resulting in an increase in noise. By arranging the magnetic material 6 having rigidity between the inner core 2 and the second inner core 3 and the outer core 4, the slack can be reduced, thereby reducing iron loss and noise. can do.

(Embodiment 3) FIG. 4 shows a schematic configuration diagram of a transformer as a stationary induction electromagnetic device according to Embodiment 3 of the present invention. 4, the same components as those in the first embodiment are denoted by the same reference numerals, detailed description thereof will be omitted, and different portions will be mainly described.

The difference from the structure of the first embodiment is that the magnetic material 22 is arranged on the iron core window side of the yoke portion forming the iron core window of the three-phase wound iron core 1.

Here, the iron core window is the first inner core 2
And a space portion existing inside the second inner core 3.

A transformer as a stationary induction electromagnetic device configured as described above will be described. When a voltage is applied to the coil 5, an exciting current flows through the coil 5, and a magnetic flux flows inside the three-phase wound core 1 by the exciting current. The magnetic flux generates iron loss and noise in the three-phase wound core 1.

Here, in the three-phase wound iron core 1, since the magnetic path length is shorter and the magnetic resistance is smaller as the magnetic steel sheet is closer to the iron core window side of the three-phase wound iron core 1, the distribution of the magnetic flux inside the three-phase wound iron core is larger toward the inner side. And the inner magnetic flux density increases. A portion having a high magnetic flux density has a small magnetic permeability indicating the ease of passage of the magnetic flux, so that it is difficult for the magnetic flux to pass. If there is a portion having a high magnetic permeability in the vicinity, the magnetic flux flows to a portion having a high magnetic permeability.

Since the magnetic material 22 is disposed on the side of the iron core window of the three-phase wound iron core 1 that is close to the portion of the yoke portion having a high magnetic flux density, the iron material flows from the leg portion to the yoke portion. The magnetic flux flows not only in the yoke portion but also in the magnetic material 22, and the magnetic material 2
The magnetic flux density is reduced in the yoke portion in which the magnetic material 22 is arranged, and increases as the magnetic flux density increases, as compared with the case where the magnetic material 22 is not provided and the case where the magnetic material 22 is arranged on the outer peripheral portion of the three-phase wound core 1. Iron loss and noise are reduced.

As described above, the magnetic material 22 is made of the three-phase wound core 1
By arranging it on the iron core window side of the yoke part constituting the iron core window, the magnetic flux density of the yoke part where the magnetic material 22 is arranged is reduced, and the number of turns and the width of the electromagnetic steel sheet are increased and the width is increased as compared with the related art. By suppressing the increase in weight and size, it is possible to realize an environment-friendly electromagnetic induction device that is lighter, saves resources, has less iron loss, and is less noisy than conventional ones.

Further, since the magnetic path length is shorter in the magnetic steel sheet on the iron core window side of the three-phase wound core 1, the distribution of the magnetic flux inside the three-phase wound core 1 is higher on the inner side, and the magnetic flux density on the inner side is higher. In general, the design magnetic flux density in the case of using a grain-oriented electrical steel sheet is about 1.7 T, but even if the average magnetic flux density of the three-phase wound core 1 is about 1.7 T, the inside is more than 1.7 T. As described in the first embodiment, when the magnetic flux density is around 1.7 T, the increase in the iron loss increases with the increase in the magnetic flux density, and the influence on the iron loss is large.

Therefore, the magnetic material 22 is disposed on the iron core window side of the yoke portion constituting the iron core window of the three-phase wound iron core 1 to reduce the magnetic flux density on the iron core window side of the yoke portion. Can be increased, and a great effect can be obtained for reducing iron loss.

Further, by disposing the magnetic material 22 on the iron core window side of the yoke portion constituting the iron core window of the three-phase wound core 1, low loss and low noise can be achieved without increasing the height of the three-phase wound iron core 1. The effect of can be obtained. And it is advantageous when it is installed inside a facility where the height is not so large.

(Embodiment 4) FIG. 5 shows a partial schematic configuration diagram of a transformer as a stationary induction electromagnetic device according to Embodiment 4 of the present invention. 5, the same components as those of the third embodiment are denoted by the same reference numerals, detailed description thereof will be omitted, and different portions will be mainly described. The difference from the configuration of the third embodiment is that the magnetic material 23 is arranged along at least the yoke portion of the three-phase wound core 1 along the iron core window side of the corner portion.

A transformer as a stationary induction electromagnetic device configured as described above will be described. When a voltage is applied to the coil 5, an exciting current flows through the coil 5, and a magnetic flux flows inside the three-phase wound core 1 by the exciting current. The magnetic flux generates iron loss and noise in the three-phase wound core 1.

Here, since the magnetic material 23 is disposed along at least the yoke portion of the three-phase wound iron core 1 and along the iron core window side of the corner portion, the magnetic flux from the legs and the yoke portion is reduced by the magnetic material 2.
In this case, the magnetic flux flowing from the leg to the yoke portion is smaller than that in the case where the magnetic flux flows from only the yoke portion to the magnetic material 23 without being arranged along the iron core window side of the yoke portion. Not only does it flow smoothly to the magnetic material 23, but the magnetic flux density is reduced in the yoke portion where the magnetic material 23 is arranged. When there is no magnetic material 23 or when the magnetic material 23 is not arranged along the iron core window side of the yoke portion Iron loss and noise are further reduced as compared with.

As described above, the magnetic material 23 is made of the three-phase wound core 1
By disposing the magnetic material 23 at least along the iron core window side of the corner portion from the yoke portion, the flow of the magnetic flux to the magnetic material 23 becomes smoother, and the magnetic material 23 is arranged by passing the magnetic flux to the magnetic material 23. The magnetic flux density of the part is reduced, the increase in the number of turns and the width of the magnetic steel sheet are increased, and the increase in weight and size is suppressed. An environment-friendly stationary induction electromagnetic device with low loss and low noise can be realized.

(Embodiment 5) FIG. 6 is a partial schematic configuration diagram of a transformer as a stationary induction electromagnetic device according to Embodiment 5 of the present invention. 6, the same components as those of the fourth embodiment are denoted by the same reference numerals, detailed description thereof will be omitted, and different portions will be mainly described.

The structure of the fourth embodiment differs from that of the fourth embodiment in that the magnetic material 24 is a laminate of electromagnetic steel sheets having different lengths which are shorter on the wound core side. The point is that the shape of the yoke portion of the wound iron core 1 is formed along the iron core window side.

A transformer as a stationary induction electromagnetic device configured as described above will be described. When a voltage is applied to the coil 5, an exciting current flows through the coil 5, and a magnetic flux flows inside the three-phase wound core 1 by the exciting current. The magnetic flux generates iron loss and noise in the three-phase wound core 1.

Here, the magnetic material 24 is a laminate of electromagnetic steel sheets having different lengths that are shorter on the wound core side, and the magnetic steel sheets having different lengths are laminated to form the yoke portion of the three-phase wound iron core 1. Since the shape is formed along the iron core window side, the magnetic flux flowing from the leg portion to the yoke portion smoothly flows not only to the yoke portion of the three-phase wound core 1 but also to the magnetic material 24, and the magnetic material 24 is arranged. The magnetic flux density is reduced in the iron portion, and iron loss and noise are reduced as compared with a case where the magnetic material 24 is not provided or a case where the magnetic material 24 is not along the iron core window side of the yoke portion.

As described above, the magnetic material 24 is a laminate of electromagnetic steel sheets having different lengths that are shorter on the wound core side, and the magnetic steel sheets having different lengths are laminated to form the yoke of the three-phase wound iron core 1. The shape of the magnetic material 24 along the iron core window side makes the flow of the magnetic flux to the magnetic material 24 smoother, and the magnetic flux is
4, the magnetic flux density of the yoke portion where the magnetic material 24 is arranged is reduced, and the increase in the number of turns and the width of the magnetic steel sheet is suppressed from being increased as compared with the conventional case, thereby increasing the weight and size. In addition, it is possible to realize an environment-friendly stationary induction electromagnetic device that is lighter and saves resources, has less iron loss, and has lower noise than before.

When ferrite or permalloy is used instead of an electromagnetic steel sheet, the magnetic flux flows through the magnetic material more easily because the magnetic permeability is larger than that of the electromagnetic steel sheet, and the magnetic flux from the legs is transferred to the yoke portion and the magnetic material. By flowing through the material, the magnetic flux density of the yoke portion provided with the magnetic material is reduced. Therefore, loss and noise can be further reduced as compared with the electromagnetic steel sheet. Further, it is preferable to use integral ferrite or permalloy.

(Embodiment 6) FIGS. 7 and 8 show a schematic configuration perspective view and a schematic configuration side view of a transformer as a stationary induction electromagnetic device according to Embodiment 6 of the present invention. 7 and 8, the same components as those in the first embodiment are denoted by the same reference numerals, detailed description thereof will be omitted, and different portions will be mainly described. The difference from the configuration of the first embodiment is that the magnetic material 25 is arranged on the side surface of the yoke of the three-phase wound core 1.

A description will be given of a transformer as a stationary induction electromagnetic device configured as described above. When a voltage is applied to the coil 5, an exciting current flows through the coil 5, and a magnetic flux flows inside the three-phase wound core 1 by the exciting current. The magnetic flux generates iron loss and noise in the three-phase wound core 1.

Here, since the magnetic material 25 is vertically stacked on the side face of the yoke portion of the three-phase wound core 1 like the yoke portion, for example, the magnetic material 25 is provided on the yoke portion where the magnetic material is arranged. In the case where there is an overlapping portion of the electromagnetic steel sheets, the magnetic layer flows in the laminating direction where the magnetic resistance increases because the air layer is included on the laminating surface. Is present, the magnetic resistance is smaller than the magnetic flux flows in the laminating direction, so that the magnetic flux easily flows from the yoke portion to the magnetic material 25 arranged on the side surface, and the magnetic flux flowing from the leg portion to the yoke portion is a three-phase wound core. The magnetic material 25 flows not only in the yoke portion 1 but also in the magnetic material 25, and the magnetic flux density is reduced in the yoke portion where the magnetic material 25 is arranged. Iron loss and noise are reduced as compared with the case of disposing.

As described above, by arranging the magnetic material 25 on the side surface of the yoke portion of the three-phase wound core 1, the magnetic flux density of the yoke portion is reduced, and the number of turns of the electromagnetic steel sheet can be increased as compared with the conventional case. By suppressing the increase in weight and dimensions by increasing the width, etc., it is possible to realize an environmentally friendly stationary induction electromagnetic device iron core that is lighter and saves resources, has less iron loss, and has lower noise than before. .

Further, by arranging the magnetic material 25 on the side of the yoke portion of the three-phase wound core 1, it is possible to obtain the effects of low loss and low noise without increasing the height of the three-phase wound core 1. . And it is effective when it is installed inside a facility where the height is not so large.

In the sixth embodiment, the magnetic material 2
Although the example in which 5 is arranged on both sides of the upper yoke is shown, the effect is reduced as compared with the case where it is arranged on both sides, but the effect of low loss and low noise is obtained even when arranged on only one side. be able to.

The magnetic material 25 is formed of the first inner core 2, the second inner core 3, and the outer core 4, and a triangular shape in which the magnetic steel sheet of the yoke portion, which is the main noise generating point, does not exist. By disposing it at a position that closes the gap (see FIG. 3), noise from the triangular gap can be insulated, and an environment-friendly stationary induction electromagnetic device with lower noise can be realized.

Further, in the sixth embodiment, the magnetic material disposed on the side surface of the yoke portion of the three-phase wound core 1 is a directional magnetic steel sheet laminated in contact with the laminated direction of the wound core. In the direction in which the magnetic flux flows back from the yoke portion of the wound core on which the magnetic material is disposed to the magnetic material and returns to the wound core, the directional electromagnetic steel sheet is laminated in contact with the direction perpendicular to the laminating direction of the wound core. Compared with the case, the space due to the lamination of electromagnetic steel sheets is only the part in contact with the wound iron core, so there is less space,
The magnetic resistance is reduced, and a greater effect of lower loss and lower noise can be obtained as compared with the case where the magnetic steel sheet is laminated vertically with the magnetic steel sheet of the wound iron core.

(Embodiment 7) FIGS. 9 and 10 show a schematic perspective view and a schematic plan view of a transformer as a stationary induction electromagnetic device according to Embodiment 7 of the present invention. FIG.
10 and FIG. 10, the same components as those in the sixth embodiment are denoted by the same reference numerals, detailed description thereof will be omitted, and different portions will be mainly described. The difference from the configuration of the sixth embodiment is that the end of the magnetic material 26 disposed on the side surface of the yoke portion of the three-phase wound core 1 in the direction along the yoke portion is inclined, and the inclination angle is set to 3
The point is that the angle is set to 0 to 60 degrees.

A description will be given of a transformer as a stationary induction electromagnetic device configured as described above. When a voltage is applied to the coil 5, an exciting current flows through the coil 5, and a magnetic flux flows inside the three-phase wound core 1 by the exciting current. The magnetic flux generates iron loss and noise in the three-phase wound core 1.

Here, the inclination angle of the end of the magnetic material 26 disposed on the side surface of the yoke portion of the three-phase wound core 1 is preferably set to 30 to 60 degrees, and the magnetic flux is transmitted to the legs of the three-phase wound core 1. Does not flow into the magnetic material 26 at an angle close to a right angle, the magnetic flux of the magnetic flux can be reduced even if a magnetic material having an inclined end in the direction along the yoke is used. As in the case of Embodiment 6 in which the flow is hardly affected and the angle is 90 degrees without tilting, the magnetic flux flowing from the leg portion to the yoke portion is transferred not only to the three-phase wound core 1 but also to the magnetic material 26. The magnetic flux density is reduced in the yoke portion, and iron loss and noise are reduced as compared with the case where the magnetic material 26 is not provided.

As described above, by inclining the end of the magnetic material 26 disposed on the side surface of the yoke portion of the three-phase wound core 1 in the direction along the yoke portion, it is possible to make the magnetic material 26 more in comparison with the sixth embodiment. With a small amount of material, the magnetic flux density of the yoke is reduced, the number of turns and the width of the electromagnetic steel sheet are increased and the weight and dimensions are reduced, and the weight and size are reduced. It is possible to realize an environment-friendly stationary induction electromagnetic device iron core which is resource saving, has low iron loss and low noise.

When the magnetic flux flows from the legs of the three-phase wound core 1 to the yoke and the magnetic material 26, the magnetic flux does not flow into the magnetic material 26 at an angle close to a right angle. Embodiment 6 in which the end of the magnetic material 26 disposed on the side surface of the iron portion in the direction along the yoke portion of the three-phase wound iron core 1 is inclined so that the angle is 90 degrees without being inclined. In this case, substantially the same effect can be obtained with less material than in the case of (1), and a stationary and inductive electromagnetic device that is resource-saving and environmentally friendly can be realized.

Embodiment 8 Embodiment 8 will be described. Since the configuration, operation, and effects are the same as those of the first embodiment, the description thereof is omitted.

Since the magnetic material is a laminate of magnetic steel sheets, the thickness of the magnetic material can be easily adjusted to a desired thickness. By increasing or decreasing the number of stacked magnetic steel sheets, characteristics such as iron loss and the like can be improved. An optimal iron core can be constructed in consideration of economy.

After the three-phase core 1 is manufactured, characteristics such as iron loss and noise are measured. If it is desired to reduce the iron loss and noise from the measured values, the design and structure of the three-phase core 1 are changed. This can be easily realized by arranging the electromagnetic steel sheets on the yoke portion of the three-phase wound core 1 and increasing the number of stacked electromagnetic steel sheets without performing the above operation.

(Embodiment 9) FIG. 11 shows a schematic front view of a transformer as a stationary induction electromagnetic device according to Embodiment 9 of the present invention. 11, the same components as those of the first embodiment are denoted by the same reference numerals, detailed description thereof will be omitted, and different portions will be mainly described.

The difference from the structure of the first embodiment is that the magnetic material 27 arranged in the yoke portion of the three-phase wound core 1 has a higher magnetic permeability than the magnetic steel sheet constituting the three-phase wound core 1. Is a point.

A description will be given of a transformer as a stationary induction electromagnetic device configured as described above. When a voltage is applied to the coil 5, an exciting current flows through the coil 5, and a magnetic flux flows inside the three-phase wound core 1 by the exciting current. The magnetic flux generates iron loss and noise in the three-phase wound core 1.

Here, the magnetic permeability of the magnetic material 27 arranged in the yoke portion of the three-phase wound core 1 is made larger than the magnetic permeability of the magnetic steel sheet constituting the three-phase wound core 1. Since the magnetic flux easily passes, the magnetic flux flowing from the leg to the yoke portion flows not only to the yoke portion of the three-phase wound core 1 but also to the magnetic material 27, and the magnetic flux density is reduced at the yoke portion where the magnetic material 27 is arranged. Thus, iron loss and noise are reduced as compared with the case where the magnetic material 27 is not provided and the case where the magnetic material is not larger than the magnetic permeability of the magnetic steel sheet constituting the three-phase wound core 1.

Also, the higher the magnetic permeability, the more easily the magnetic flux passes, so that the magnetic flux easily flows through the magnetic material 27. And
In the hysteresis loop showing the magnetization characteristics of the magnetic material,
The magnetic permeability is a gradient obtained by dividing the magnetic flux density by the strength of the magnetic field.The larger the gradient, the smaller the area surrounded by the hysteresis loop. High magnetic susceptibility and small iron loss.

Therefore, by increasing the magnetic flux flowing through the magnetic material 27 and decreasing the magnetic flux flowing through the yoke, it is possible to further reduce iron loss as compared with the case where magnetic materials having the same or smaller magnetic permeability are arranged. .

Although the first embodiment has been described above, the same applies to the second to eighth embodiments.

(Embodiment 10) FIGS. 12, 13 and 1
FIGS. 4 (a), 14 (b) and 14 (c) show a schematic configuration perspective view and a schematic configuration side view of a transformer as a stationary induction electromagnetic device according to Embodiment 10 of the present invention, and a magnetic steel plate forming a wound iron core. FIG. 12 and 13
In the second embodiment, the same components as those of the twelfth embodiment are denoted by the same reference numerals, detailed description thereof will be omitted, and different portions will be mainly described. The difference from the configuration of the first embodiment is that a magnetic material is not disposed, but a width as shown in FIG. 14 ((a) is a front view, (b) is a plan view, and (c) is a side view). The direction is not constant, and a plurality of magnetic steel sheets 61 in which the width direction dimension of a portion serving as a yoke portion is larger than the width direction size of a portion serving as a leg portion are wound and laminated to form a first inner wound core 41 and This is a point that the wound core 31 including the second inner wound core 42 and the outer wound core 43 is configured.

A transformer as a stationary induction electromagnetic device configured as described above will be described. When a voltage is applied to the coil 5, an exciting current flows through the coil 5, and the exciting current causes a magnetic flux to flow inside the wound core 31. With this magnetic flux,
In the wound iron core 31, iron loss and noise are generated.

Here, since the width of the magnetic steel sheet is not constant, and the width direction dimension of the portion serving as the yoke portion is larger than the width direction size of the portion serving as the leg portion, as in the first embodiment. Compared to the case where magnetic material is arranged, there is no joint with an air layer that increases the magnetic resistance and prevents the flow of magnetic flux, so the magnetic flux flowing from the leg to the yoke more easily has the same width as the leg. Not only the part but also the part where the width is widened, the magnetic flux density is reduced in the yoke part, compared to the case where the magnetic material is placed on the wound core and the wound iron core wound with a constant width electromagnetic steel sheet Iron loss and noise are reduced.

As described above, by winding an electromagnetic steel sheet in which the width direction is not constant and the width dimension of the part to be the yoke is larger than the width direction dimension of the part to be the leg, Reduces magnetic flux density, suppresses increase in weight and size by increasing the number of turns and width of electrical steel sheets compared to conventional ones, and is lighter, resource saving, and less iron loss than conventional ones. An environmentally friendly stationary induction electromagnetic device with low noise can be realized.

Further, the height of the wound core 31 is increased by winding an electromagnetic steel sheet whose width direction is not constant and the width direction dimension of the portion serving as the yoke portion is larger than the width direction size of the portion serving as the leg portion. The effect of low loss and low noise can be obtained without increasing the height. And it is advantageous when it is installed inside a facility where the height is not so large.

In the tenth embodiment, the electromagnetic steel sheet is shown with the dimensions increased on both sides of the upper yoke, but the effect is reduced as compared with the case where the dimensions are increased on both sides, but only on one side. Even in the case where it is increased, the effect of low loss and low noise can be obtained.

Further, even when the width dimension of the lower yoke portion is increased similarly to the upper yoke portion, the effect of reducing iron loss and noise can be obtained. Even when the width dimension of both the upper and lower yoke portions is increased, the effect of reducing iron loss and noise can be obtained.

Further, the wound core 31 is cut so as to have a longer length toward the outer peripheral portion so as to have a predetermined configuration, and the widthwise dimension of the portion to be the yoke portion is the widthwise dimension of the portion to be the leg portion. It can be manufactured by winding a magnetic steel sheet that has been punched out to be larger.

[0109] Not only the electromagnetic steel sheets constituting the first inner core 41, the second inner core 42, and the outer core 43, but only the electromagnetic steel constituting one of them, in the width direction. However, the effect of reducing iron loss and noise can be obtained by making the width direction dimension of the portion that becomes the yoke portion larger than the width direction dimension of the portion that becomes the leg portion.

(Embodiment 11) FIGS. 15, 16, and 1
FIGS. 7 (a), 17 (b) and 17 (c) show a schematic perspective view and a schematic plan view of a transformer as an electromagnetic induction electromagnetic device according to Embodiment 11 of the present invention, and electromagnetic components forming an outer winding core. The external view of a steel plate is shown.

15 and 16, the same components as those in the tenth embodiment are denoted by the same reference numerals, detailed description thereof will be omitted, and different portions will be mainly described.

The difference from the structure of the tenth embodiment is that FIG.
6. As shown in FIGS. 17 (a), 17 (b) and 17 (c), the width direction dimension of the portion to be the yoke portion is larger than the width direction size of the leg portion, and The end of the wide portion of the portion in the direction along the yoke portion is inclined at an angle of 30 degrees to 60 degrees, and includes a first inner core 51, a second inner core 52, and an outer core 53. Core 32
It is the point which comprised.

The inclination is, for example, that the magnetic steel sheet of the yoke portion has a wide portion based on the shape shown in FIG. 17 ((a) is a front view, (b) is a plan view, and (c) is a side view). It can be realized by manufacturing the length so as to have the above-mentioned inclination angle (the length in the direction along the yoke portion of the wide portion is changed), and winding and laminating a plurality of pieces.

A transformer as a stationary induction electromagnetic device configured as described above will be described. When a voltage is applied to the coil 5, an exciting current flows through the coil 5, and the exciting current causes a magnetic flux to flow inside the wound core 32. With this magnetic flux,
In the wound core 32, iron loss and noise are generated.

The yoke portion of the wound iron core 32 is formed by winding an electromagnetic steel sheet whose width direction is not constant and the width direction dimension of the portion serving as the yoke portion is larger than the width direction size of the portion serving as the leg portion. When the magnetic flux flows from the leg of the wound core 32 to the yoke, the angle of inclination of the corner of the magnetic steel sheet is 30 to 60 degrees. Since it does not flow at a close angle, the angle of inclination of the corner of the magnetic steel sheet constituting the yoke of the wound iron core 32 is from 30 degrees to 60 degrees.
Even when the material used is reduced to an angle of degree, the flow of the magnetic flux is hardly affected, and the magnetic flux flowing from the leg to the yoke is substantially the same as in the case of Embodiment 10 in which the magnetic flux is not inclined. The magnetic flux density is reduced at the yoke part as well as the part with the same width as that of the core, and the iron loss and noise are reduced as compared with the wound iron core wound with a constant width electromagnetic steel sheet You.

As described above, the width of the magnetic steel sheet is not constant, and the width of the yoke portion is larger than that of the leg portion. The angle of inclination of the corners of the electromagnetic steel sheet constituting from 30 to 60
The magnetic flux density of the yoke is reduced, the number of turns of the electromagnetic steel sheet is increased and the width is increased compared to the conventional type, and the weight and size are suppressed from increasing. It is possible to realize an environmentally friendly stationary induction electromagnetic device that is lightweight, saves resources, has low iron loss, and has low noise.

The magnetic flux flowing from the leg to the yoke flows not only in the portion having the same width as the leg but also in the portion having a wide width, and at an angle close to a right angle to the portion having the wide width. Since the steel sheet does not flow, the inclination angle of the electromagnetic steel sheet forming the yoke portion of the wound iron core 32 is set to an angle of 30 to 60 degrees. Almost the same effect can be obtained with less material than in the case, and a resource-saving and environmentally friendly stationary induction electromagnetic device iron core can be realized.

It should be noted that with respect to the configurations of the above-described first to eleventh embodiments, when the respective configurations are combined, the same or higher effects can be obtained as compared with the case of the single configurations.

In the first to ninth embodiments,
Although the example in which the magnetic material is arranged only in the upper yoke of the three-phase wound core 1 is shown, the same effect can be obtained by arranging only the lower yoke, or both the upper yoke and the lower yoke. Obtainable. Here, the upper yoke portion is located far from the installation surface such as the ground, and the lower yoke portion is located near the installation surface.

In the first to ninth embodiments,
The magnetic material may be fixed to the yoke portion using an insulator such as bakelite so as not to form an electric closed circuit surrounding the yoke portion of the three-phase wound core 1.

In the first to eleventh embodiments, the three-phase wound core has been described.
The same effect can be obtained with a single-phase wound core.

[0122]

As is apparent from the above description, according to the first stationary induction electromagnetic device of the present invention, the three-phase three-phase electromagnetic coil comprising two inner wound cores and one outer wound iron core laminated with electromagnetic steel sheets. Since the winding core and the magnetic material arranged in the thickness direction of the yoke portion of the three-phase winding core are provided, the magnetic flux density of the yoke portion is reduced, so that iron loss and noise can be reduced.

Further, since the magnetic flux density of the yoke where noise is most likely to be generated can be reduced, the effect of reducing noise is great. In this way, by arranging the magnetic material efficiently, resource saving can be realized for the entire iron core.

Further, according to the second stationary induction electromagnetic device of the present invention, in the first stationary induction electromagnetic device, the magnetic material is disposed on the three-phase wound core, and the magnetic flux passing through the legs is provided. However, the magnetic flux flows into the magnetic material disposed on the three-phase wound core, and the magnetic flux density of the three-phase wound core provided with the magnetic material is reduced. Therefore, loss and noise that increase with an increase in the magnetic flux density can be reduced.

According to the third stationary induction electromagnetic device of the present invention, in the first stationary induction electromagnetic device, the magnetic material has rigidity, and the outer peripheral surface of the inner core and the inner peripheral surface of the outer core. And the magnetic flux density of the yoke portion is reduced, so that iron loss and noise can be reduced.

Further, by arranging a magnetic material having rigidity between the inner core and the outer core having the largest slack to reduce the slack, it is possible to effectively reduce the noise that has been increased due to the slack. Can be. As described above, by arranging the magnetic material efficiently, resource saving can be realized as the whole iron core, and the effect of noise reduction can be enhanced.

According to the fourth stationary induction electromagnetic device of the present invention, in the first stationary induction electromagnetic device, the magnetic material is disposed on the flat portion of the inner peripheral surface of the yoke portion of the inner core.
Efficiently reduce the magnetic flux density of the yoke with a small amount of magnetic material,
Iron loss and noise are reduced.

Further, by arranging a magnetic material on the iron core window side of the yoke portion, it is possible to reduce iron loss and noise without increasing the height of the entire iron core.

Further, according to the fifth stationary induction electromagnetic device of the present invention, in the first stationary induction electromagnetic device, the magnetic material is formed along at least the inner peripheral surface of the yoke including the corners of the inner core. As a result, the flow of magnetic flux is made more efficient, and iron loss and noise are reduced more effectively than the effects of the first and fourth stationary induction electromagnetic devices.

Further, according to the sixth stationary induction electromagnetic device of the present invention, a three-phase wound core comprising two inner wound cores and one outer wound core laminated with electromagnetic steel sheets, and the three-phase wound iron core is provided. With the magnetic material arranged on the side of the yoke, the magnetic resistance to the magnetic flux over the magnetic material can be reduced, the magnetic flux density of the yoke can be reduced, and the effect of reducing iron loss and noise can be reduced. Can be bigger.

Further, according to the seventh stationary induction electromagnetic device of the present invention, the end of the sixth stationary induction electromagnetic device in the direction along the yoke is inclined. In addition to the effect, the amount of magnetic material used is reduced, so that resource saving and weight reduction can be realized.

According to the eighth stationary induction electromagnetic device of the present invention, in any one of the first to seventh stationary induction electromagnetic devices, the magnetic material is a laminate of electromagnetic steel plates. In addition, the thickness of the magnetic material can be easily adjusted to a desired thickness, and by increasing or decreasing the number of laminated electromagnetic steel sheets, it is possible to configure an optimal iron core in consideration of characteristics and economy.

When the characteristics are measured after the wound core is manufactured, and it is desired to reduce the iron loss and noise from the measured values, the magnetic steel sheet can be used for the yoke of the wound core without changing the design or structure of the wound core. By arranging and increasing the number of laminated electromagnetic steel sheets, these can be realized more easily than in the past.

Further, according to the ninth static induction electromagnetic device of the present invention, in any one of the first to eighth static induction electromagnetic devices, the magnetic material has a magnetic permeability that is the same as that of the magnetic steel sheet constituting the wound core. Because the larger the permeability, the easier the magnetic flux passes through the larger the magnetic permeability, the easier the magnetic flux flows to the magnetic material,
Iron loss and noise of the wound iron core can be reduced more efficiently than when a magnetic material having the same or smaller magnetic permeability is provided.

According to the tenth stationary induction electromagnetic device of the present invention, in the ninth stationary induction electromagnetic device, the magnetic material is ferrite or permalloy. The magnetic flux flows through the magnetic material, and the magnetic flux from the leg portion flows through the yoke portion and the magnetic material, so that the magnetic flux density of the yoke portion provided with the magnetic material is reduced. for that reason,
The loss and noise can be further reduced as compared with the seventh stationary induction electromagnetic device.

According to the eleventh stationary induction electromagnetic device of the present invention, there is provided a three-phase wound core comprising two inner wound cores and one outer wound iron core laminated with electromagnetic steel sheets. Since the width of at least a part of the yoke portion of the wound core is larger than the width of the legs of the three-phase wound core, there are few factors that increase the magnetic resistance as compared with the case where a magnetic material is provided on the wound core. As a result, the magnetic flux more easily flows through the magnetic material, and the magnetic flux density of the yoke portion is reduced. And the effect of reducing iron loss and noise can be increased.

According to the twelfth stationary induction electromagnetic device of the present invention, in the tenth stationary induction electromagnetic device, the end in the direction along the yoke portion that is larger than the width of the leg portion is inclined. In addition to the effects of the ten stationary induction electromagnetic devices, the amount of magnetic material used is reduced, so that resource saving and weight reduction can be realized.

[Brief description of the drawings]

FIG. 1 is a perspective view of a transformer according to a first embodiment of the present invention.

FIG. 2 is a front view of the transformer according to the first embodiment.

FIG. 3 is a configuration diagram of a transformer according to the second embodiment.

FIG. 4 is a configuration diagram of a transformer according to the third embodiment.

FIG. 5 is a partial configuration diagram of a transformer according to the fourth embodiment.

FIG. 6 is a partial configuration diagram of a transformer according to the fifth embodiment.

FIG. 7 is a perspective view of a transformer according to the sixth embodiment.

FIG. 8 is a side view of the transformer according to the sixth embodiment.

FIG. 9 is a perspective view of a transformer according to the seventh embodiment.

FIG. 10 is a plan view of a transformer according to a seventh embodiment.

FIG. 11 is a front view of a transformer according to the ninth embodiment.

FIG. 12 is a perspective view of a transformer according to the tenth embodiment.

FIG. 13 is a side view of the transformer according to the tenth embodiment.

FIG. 14A is a schematic front view of an electromagnetic steel sheet forming an outer core of a transformer according to the tenth embodiment. FIG. 14B is a schematic front view of an electromagnetic steel sheet forming an outer core of a transformer according to the tenth embodiment. Plan view (c) Schematic side view of an electromagnetic steel sheet constituting the outer wound core of the transformer according to the tenth embodiment

FIG. 15 is a perspective view of a transformer according to an eleventh embodiment.

FIG. 16 is a side view of the transformer according to the eleventh embodiment.

FIG. 17A is a schematic front view of an electromagnetic steel sheet forming an outer core of a transformer according to the eleventh embodiment. FIG. 17B is a schematic view of an electromagnetic steel sheet forming an outer core of a transformer according to the eleventh embodiment. Plan view (c) Schematic side view of an electromagnetic steel sheet constituting the outer core of the transformer according to Embodiment 11

FIG. 18 is a perspective view of a conventional transformer.

[Explanation of symbols]

1, 31, 32 Three-phase wound core 2, 41, 51 First inner wound core 3, 42, 52 Second inner wound core 4, 43, 53 Outer wound core 5 Coil 6, 21, 22, 23, 24 , 25,26,27 Magnetic material

Claims (12)

[Claims] 1. A stationary induction electromagnetic device comprising: a three-phase wound core in which electromagnetic steel sheets are stacked; and a magnetic material disposed in a thickness direction of a yoke portion of the three-phase wound core. 2. The stationary induction electromagnetic device according to claim 1, wherein the magnetic material is disposed on a three-phase wound core. 3. The stationary induction electromagnetic device according to claim 1, wherein the magnetic material has rigidity and is disposed between an outer peripheral surface of the inner core and an inner peripheral surface of the outer core. 4. The stationary induction electromagnetic device according to claim 1, wherein the magnetic material is disposed on a flat portion of the inner peripheral surface of the yoke portion of the inner core. 5. The stationary induction electromagnetic device according to claim 1, wherein the magnetic material is disposed along an inner peripheral surface of a yoke portion including at least a corner portion of the inner core. 6. A three-phase wound core comprising two inner wound iron cores and one outer wound iron core laminated with magnetic steel sheets, and a magnetic material disposed on a side surface of a yoke portion of the three-phase wound iron core. Static induction electromagnetic equipment. 7. The stationary induction electromagnetic apparatus according to claim 6, wherein the magnetic material has an inclined end in a direction along the yoke. 8. The stationary induction electromagnetic device according to claim 1, wherein the magnetic material is a laminate of electromagnetic steel sheets. 9. The stationary induction electromagnetic device according to claim 1, wherein the magnetic material has a magnetic permeability higher than that of an electromagnetic steel plate forming the wound core. 10. The stationary induction electromagnetic device according to claim 9, wherein the magnetic material is ferrite or permalloy. 11. A three-phase wound core comprising two inner wound iron cores and one outer wound iron core laminated with electromagnetic steel sheets, wherein at least a part of a width of a yoke portion of the three-phase wound iron core has a width dimension. A stationary induction electromagnetic device that is larger than a width of a leg of the three-phase wound core. 12. The stationary induction electromagnetic device according to claim 10, wherein an end portion in a direction along a yoke portion larger than a width dimension of the leg portion is inclined.