JP2007165346A - Reactor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reactor where vibration and noise can be reduced without deteriorating rigidity of the reactor even if a void part for adjusting a magnetic saturation characteristic is formed in a magnetic core. <P>SOLUTION: The reactor is provided with a first iron 1 which is formed in an E shape and has a center projection 10b, projections 10a and 10c at both ends, and a base iron core 15; a second iron core 2 adjusted to the first iron 1; winding 3 wound to the center projection 10b formed in the first iron 1; an adhesion 6 where at least a part of end faces of the projections 10a and 10c on both ends of the first iron 1 and the end face of the center projection 10b in the first iron 1 is adjusted to the second iron 2; and a void 8 for adjusting magnetic saturation characteristic, which is arranged in a first magnetic path and a second magnetic path 2 or near the adhesion 6 of a common magnetic path of the first magnetic path 1 and the second magnetic path 2 or near a shift to the base iron core 15, and is formed of a long hole or a slit. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to the structure of a reactor used for countermeasures against harmonic currents in inverter equipment.

  The cored core type reactor is often used for power factor improvement in inverter equipment, which has recently been remarkably popular, especially for consumer-use inverter air conditioners.

An air gap for adjusting magnetic saturation characteristics with respect to the I-type iron core is formed at the tip of the winding portion corresponding to the center of the E-type iron core, which has an E-type iron core and an I-type iron core attached to each other. The opposite side and opposite side of the air gap in the I-type iron core are formed as a flat surface and a concave surface, respectively, or vice versa. A reactor has been proposed in which the air gap facing surface and the facing opposite surface are formed in a concave surface and a flat surface, respectively (for example, see Patent Document 1).
Japanese Utility Model Publication No. 2-95217

  In the conventional reactor, since an air gap with respect to the I-type iron core is formed at the tip of the winding portion corresponding to the center portion of the E-type iron core, electromagnetic vibration in the air gap is inevitable. Due to the presence of the air gap, the main component of the vibration generated by the reactor may be close to the resonance frequency of the casing of the air conditioner, for example, which causes the vibration of the air conditioner.

  The present invention has been made to solve the above-described problems, and even if a gap for adjusting magnetic saturation characteristics is provided in the iron core, the rigidity of the reactor is not reduced, and vibration and noise are reduced. An object is to provide a reactor that can be used.

  The reactor according to the present invention is formed in an E shape, and is attached to a first iron core portion having a central protrusion, two protrusions at both ends, and a bottom iron core, and the first iron core. A second iron core, a winding wound around a central protrusion formed in the first iron core, end surfaces of two protrusions at both ends of the first iron core, and the first iron core A close contact portion formed by attaching at least a part of an end surface of the central projection portion of the first core portion, a central projection portion of the first iron core portion, a part of the second iron core portion, A first magnetic path composed of a protrusion at one end of the first iron core, a part of the bottom iron core of the first iron core, a protrusion at the center of the first iron core, A second magnetic path composed of a part of the iron core part 2, a protrusion at the other end of the first iron core part, and a part of the bottom iron core of the first iron core part; Road and second Magnetic saturation formed by a long hole or a slit provided in each of the paths, or in the vicinity of the close contact portion of the common magnetic path of the first magnetic path and the second magnetic path or in the vicinity of the transition portion to the bottom iron core And a gap for adjusting characteristics.

  With the above configuration, the reactor according to the present invention can reduce vibration and noise without reducing the rigidity of the reactor even if a gap for adjusting magnetic saturation characteristics is provided in the iron core.

Embodiment 1 FIG.
1 to 11 are diagrams showing the first embodiment, FIG. 1 is a perspective view of the reactor 20, FIG. 2 is a sectional view of the reactor 20, FIG. 3 is a sectional view showing a magnetic circuit of the reactor 20, and FIG. FIG. 5 is a diagram showing frequency characteristics of vibration of the reactor 20, and FIGS. 6 to 11 are sectional views of a reactor 20 according to a modification.

  As shown in FIG. 1, the reactor 20 includes an E-shaped first iron core portion 1, an I-shaped second iron core portion 2, and a winding 3 wound around the first iron core portion 1. Is provided. The first iron core portion 1 has a protrusion 10 a, a protrusion 10 b, and a protrusion 10 c, and the winding 3 is wound around the protrusion 10 b and stored in the slot 4. On the inner side of the end face of the protrusion 10b, a gap 8 is provided for adjusting the magnetic saturation characteristics of the magnetic circuit to obtain a predetermined inductance.

  As shown in FIG. 2, the reactor 20 includes an insulating portion 5 that electrically insulates the winding 3 wound around the first iron core portion 1. The first iron core portion 1 is formed in an E shape by laminating electromagnetic steel plates (thickness, 0.15 to 0.5 mm) one by one. The second iron core portion 2 is formed in an I-shape by laminating electromagnetic steel sheets in the same manner as the first iron core portion 1. The winding 3 is wound around the first iron core portion 1, and the winding 3 is accommodated in the slot 4. The insulating part 5 is made of a nonmagnetic material and electrically insulates the first iron core part 1, the second iron core part 2, and the winding 3. The first iron core portion 1 having an E shape is provided with a protruding portion 10a, a protruding portion 10b, and a protruding portion 10c, and the winding 3 is wound around the protruding portion 10b.

  A close contact portion in which an end surface of the first iron core portion 1 having an E shape (end surfaces of the protrusion portion 10a, the protrusion portion 10b, and the protrusion portion 10c) and an end surface of the second iron core portion 2 having an I shape are in close contact with each other. 6 and a gap 8 formed by a long slot extending in the direction of the end face of the protrusion 10b is provided inside the end face of the protrusion 10b at the center of the first iron core 1 having an E shape. Thin-walled iron cores 13 having the same thickness as that of the electromagnetic steel sheet (0.15 to 0.5 mm) are provided at both ends in the longitudinal direction of the gap 8 of the long hole.

When a voltage is applied to the reactor 20, a current flows through the winding 3. When a current flows through the winding 3, as shown in FIG. 3, a magnetic flux flows through the first magnetic path 14a and the second magnetic path 14b. In the flow of magnetic flux shown in FIG. 3, since the voltage is alternating current, the illustrated direction and the opposite direction are repeated alternately. The inductance L of the reactor 20 is expressed by the following equation.
L = (4πμ _s SN ² ) 10 ⁻⁷ / l _g (1)
here,
L: Reactor 20 inductance [H]
μ _s : relative permeability of air S: cross-sectional area in the longitudinal direction of the gap 8 [m ² ]
N: number of turns l _g of the winding 3: length of the gap portion 8 (the direction of magnetic flux flow) [m]
Accordingly, the length l _g of the gap portion 8, by selecting, can be predetermined inductance L.

  In the reactor 20 shown in FIG. 2, the gap 8 is inside the protrusion 10b of the first iron core 1, and the end surface of the protrusion 10b is in close contact with the second iron core 2 (contact 6). The rigidity is improved as compared with the conventional one.

  A method for fixing the first iron core portion 1 and the second iron core portion 2 will be described. The protrusions 10a and 10c of the first iron core 1 and the second iron core 2 are fixed by welding or adhesion. Further, the protrusion 10b of the first iron core portion 1 and the second iron core portion 2 are fixed by adhesion or press-fitting. FIG. 4 shows an example of a method for fixing the protruding portion 10b of the first iron core portion 1 and the second iron core portion 2 by press-fitting.

  The frequency characteristics of the vibration of the reactor 20 are measured for the conventional one and the structure shown in FIG. 2, and the measurement results are shown in FIG. In FIG. 5, the horizontal axis represents frequency, the vertical axis represents vibration (acceleration), the conventional reactor is indicated by a broken line, and the reactor 20 of FIG. 2 is indicated by a solid line. As shown in FIG. 5, the low-order peak frequency of the vibration of the conventional reactor is in the vicinity of the point A, whereas in the reactor 20 in FIG. 2, the vicinity of the point B corresponding to a frequency about twice the frequency of the point A. It can be seen that the low-order peak frequency of vibration moves. This is because, for example, the resonance frequency of the casing of the air conditioner is in the vicinity of point A. In the conventional reactor, the resonance of the air conditioner increases and the vibration of the air conditioner increases. However, if the reactor 20 in FIG. Resonance can be avoided because the peak frequency moves to the vicinity of point B, which means that the vibration of the air conditioner is reduced.

  As described above, the gap portion 8 for adjusting the magnetic saturation is formed inside the end surface portion of the protrusion 10b, and the close contact portion 6 in which the end surface of the first iron core portion and the end surface of the second iron core portion are in close contact with each other. By providing the first core portion 1 and the second core portion 2 by the close contact portion 6, the rigidity of the reactor 20 is improved, and the vibration and noise of the reactor 20 can be reduced.

  Moreover, since the rigidity of the reactor 20 is improved and the main peak frequency in the eigenvalue of the vibration of the reactor 20 is increased, for example, the resonance point of the casing of the air conditioner is removed, and the vibration of the air conditioner is reduced. .

  Note that the configuration of the gap 8 is not limited to the configuration of FIG. 2. For example, as shown in FIG. 6, the end surface of the central protrusion 10 b of the first iron core 1 having an E shape. You may make it the structure which provides the notch which makes a part a concave surface. As in FIG. 2, thin core portions 13 having the same thickness as that of the electromagnetic steel sheet (0.15 to 0.5 mm) are provided at both ends of the gap portion 8 constituted by the notches. Further, the end surface of the thin-walled iron core portion 13 becomes the close contact portion 6. The area of the close contact portion 6 with the second iron core portion 2 in the central protrusion portion 10b is smaller than that of FIG. 2, but the presence of the close contact portion 6 with the second iron core portion 2 in the central protrusion portion 10b. The rigidity of the reactor 20 is improved, and the vibration and noise of the reactor 20 can be reduced. Moreover, since the rigidity of the reactor 20 is improved and the main peak frequency in the eigenvalue of the vibration of the reactor 20 is increased, for example, the resonance point of the casing of the air conditioner is removed, and the vibration of the air conditioner is reduced. . In FIG. 6 and subsequent figures, the winding 3 and the insulating portion 5 are not shown.

  Further, as shown in FIG. 7, a thin core portion 13 having a width about twice the thickness (0.35 to 0.5 mm) of the electromagnetic steel plate is provided at the center portion of the end face of the projection portion 10 b of the first core portion 1. It is also possible that the end face of the thin-walled iron core portion 13 is brought into close contact with the second iron core portion 2 to form the close-contact portion 6, and notches communicating with the slots 4 are provided on both sides thereof, and the notches may be used as the gap portions 8. .

  Further, the gap 8 is not limited to the position of the first core part 1 having the E shape, and may be provided in the second core part 2. For example, as shown in FIG. 8, in the longitudinal direction of the second core portion 2, in the vicinity of the end surface of the second core portion 2 having an I-shape facing the central protrusion 10 b in the first core portion 1. The gap 8 may be formed. The length of the gap 8 in the longitudinal direction is slightly longer than the length of the end face of the protrusion 10b. In this case, the thin core portion 13 is not necessary.

  Further, as shown in FIG. 9, a notch that is a concave surface is provided in a portion of the second iron core portion 2 that faces the end surface of the protruding portion 10 b of the first iron core portion 1. You may make it the structure to carry out. In this case, the length of the gap portion 8 in the longitudinal direction is shorter than the length of the end face of the protrusion 10b of the first iron core portion 1 by about twice the thickness of the electromagnetic steel sheet.

  Further, as shown in FIGS. 10 and 11, it can be configured by providing a gap 8 across both the first iron core portion 1 and the second iron core portion 2.

  In the present embodiment, the first iron core portion 1 is formed in an E shape and the second iron core portion 2 is formed in an I shape. However, the present invention is not limited to this. For example, the first iron core portion is formed. The same effect can be obtained by configuring both the first and second iron core portions 2 with the E type.

Embodiment 2. FIG.
12 to 19 show the second embodiment, FIG. 12 is a cross-sectional view of the reactor 20, and FIGS. 13 to 19 are cross-sectional views of a reactor 20 according to a modification. In the first embodiment, the close contact portion 6 is provided in which the end surface of the central protrusion portion 10b of the first iron core portion 1 having the E shape and the end surface of the second iron core portion 2 having the I shape are in close contact with each other. The gap portion 8 formed by a long hole is provided in the vicinity of the end face of the central protrusion 10b of the first iron core portion 1 in the vicinity of the close contact portion 6 as shown in FIG. In the present embodiment, among the three protrusions 10a, protrusions 10b, and protrusions 10c of the first core part 1 having the E shape, the base part of the center protrusion 10b (the transition part to the bottom core 15). ) Are provided with gaps 8 constituted by slits in the vertical direction with respect to the longitudinal direction of the protrusions 10b (perpendicular to the second iron core part 2), and the both sides of the gap 8 in the longitudinal direction are thin-walled iron core parts 13 Are connected to each other.

  As described above, the first core portion 1 and the second core portion 2 are held by the three close contact portions 6 by configuring the gap portion 8 at the base portion of the protruding portion 10b of the first core portion 1. Therefore, the rigidity of the reactor 20 is improved and vibration and noise can be reduced. Further, since the rigidity of the reactor 20 is improved and the main peak frequency in the frequency characteristics of the vibration of the reactor 20 is increased, for example, the effect of reducing the vibration of the air conditioner by moving away from the resonance point of the casing of the air conditioner. is there.

  It should be noted that at least one thin iron core portion 13 is sufficient, and the slit forming the gap 8 may be composed of a plurality of slits.

  Moreover, as shown in FIGS. 13-17, the space | gap part 8 may be formed in arbitrary positions other than the root part of the projection part 10b.

  The reactor 20 of FIG. 13 is provided with a gap portion 8 having a thin core portion 13 on one side in the vicinity of the center in the longitudinal direction of the protruding portion 10b. The gap 8 communicates with the slot 4.

  The reactor 20 of FIG. 14 is provided with a gap portion 8 having a thin core portion 13 in the center in the vicinity of the root portion in the middle of the projection portion 10b in the longitudinal direction. The divided gap portions 8 communicate with the slots 4 respectively.

  The reactor 20 of FIG. 15 is provided with the three-divided gap portion 8 in the vicinity of the root portion in the middle of the protruding portion 10b in the longitudinal direction. A thin iron core portion 13 is provided between the gap portions 8 and between the slot 4 and the gap portion 8.

  The reactor 20 shown in FIG. 16 is provided with a three-divided gap portion 8 in the vicinity of the central portion in the longitudinal direction of the protrusion 10b. The gap length at the center is shorter than the gap portions 8 on both sides. ing. The thin-walled iron core portions 13 are provided at two positions between the gap portions 8, and the gap portions 8 on both sides communicate with the slot 4. By making the gap length of the central gap portion 8 shorter than the gap lengths of the gap portions 8 on both sides, the magnetic flux passes near the center of the protrusion 10b, so that the leakage flux can be reduced and the loss of the reactor 20 can be reduced. Moreover, the influence on other apparatuses by leakage magnetic flux can be suppressed.

  The reactor 20 in FIG. 17 is the same as that in FIG. 16, but differs from that in FIG. 16 only in that the outer space 8 is not in communication with the slot 4 in the space 8 divided into three. .

  Moreover, the space | gap part 8 is not limited to the protrusion part 10b, but as shown in FIG. 18, the space | gap part 8 is provided in three places, the protrusion part 10a of the 1st iron core part 1, the protrusion part 10b, and the protrusion part 10c. May be dispersed.

In the reactor 20 of FIG. 18, the gaps 8 are distributed and provided at three locations of the protrusion 10 a, the protrusion 10 b, and the protrusion 10 c of the first iron core 1. In the first magnetic path 14a (see FIG. 3), the gap 8 of the protrusion 10b and the gap 8 of the protrusion 10a exist in series. Further, in the second magnetic path 14b (see FIG. 3), the gap 8 of the protrusion 10b and the gap 8 of the protrusion 10c exist in series. Therefore, in order to make the inductance of the reactor 20 constant, the gap length of each gap portion 8 in FIG. 18 is set to 1/2 of the gap length l _g of the gap portion 8 in FIGS.

  Moreover, as shown in FIG. 19, you may provide the several space | gap part 8 in the longitudinal direction of the projection part 10b.

In the reactor 20 of FIG. 19, two gaps 8 are arranged in the longitudinal direction of the protrusion 10b. Again, in order to make the inductance of the reactor 20 constant, the gap length of each gap portion 8 in FIG. 18 is set to 1/2 of the gap length l _g of the gap portion 8 in FIGS.

Embodiment 3 FIG.
20 and 21 are diagrams showing the third embodiment. FIG. 20 is a cross-sectional view of the reactor 20, and FIG. In the present embodiment, as shown in FIG. 20, a gap 8 formed by a slit in the direction perpendicular to the longitudinal direction of the projection 10b is formed on the projection 10b of the first iron core portion 1 having an E shape. At the same time, the constriction 8a (width 1 to 2 mm) is provided at the center of the gap 8 so that the gap length at the center of the gap 8 is reduced.

  As described above, by configuring the gap 8, leakage of magnetic flux flowing through the protrusion 10 b can be reduced, and an efficient reactor 20 can be realized. In addition, since the first iron core portion 1 and the second iron core portion 2 are held by the three close contact portions 6, the rigidity of the reactor is improved, and vibration and noise can be reduced. Further, since the rigidity of the reactor 20 is improved and the main peak frequency in the frequency characteristics of the vibration of the reactor 20 is increased, for example, the effect of reducing the vibration of the air conditioner by moving away from the resonance point of the casing of the air conditioner. is there.

  Note that the shape of the gap 8 is not limited to that shown in FIG. 20. For example, a similar effect can be obtained by making the gap 8 smoothly smaller toward the center of the protrusion 10 b as shown in FIG. 21. can get.

Embodiment 4 FIG.
FIGS. 22 to 27 are diagrams showing the fourth embodiment. FIG. 22 is a cross-sectional view of the reactor 20, and FIGS. In the present embodiment, as shown in FIG. 22, a close contact portion 6 is provided in which the end surface of the first iron core portion 1 having an E shape is in close contact with the end surface of the second iron core portion 2 having an I shape. Two gaps 8 formed of slits are provided in a direction perpendicular to the longitudinal direction of the second iron core portion 2 having an I-shape and opposed to the slots 4 of the first iron core portion 1; The both sides of the gap portion 8 in the longitudinal direction are connected by the thin core portion 13.

  As described above, by forming the two gap portions 8 in the second iron core portion 2, the first iron core portion 1 and the second iron core portion 2 are held by the three close contact portions 6. Therefore, the rigidity of the reactor 20 is improved, and vibration and noise can be reduced. Further, since the rigidity of the reactor 20 is improved and the main peak frequency in the frequency characteristics of the vibration of the reactor 20 is increased, for example, the effect of reducing the vibration of the air conditioner by moving away from the resonance point of the casing of the air conditioner. is there.

  In addition, instead of providing the gap portion 8 formed of a slit in a direction perpendicular to the longitudinal direction of the second iron core portion 2 having the I shape and facing the slot 4 of the first iron core portion 1, As shown in FIG. 23, the path of the magnetic flux is obstructed in the region of the I-shaped second iron core portion 2 facing the protruding portions 10a and 10c on both sides of the first iron core portion 1 forming the E shape. As described above, the gap portion 8 formed of a slit obliquely may be provided.

  Further, as shown in FIG. 24, the path of the magnetic flux is obstructed in the region of the second iron core portion 2 forming the I-shape facing the central protrusion 10b of the first iron core portion 1 forming the E shape. You may provide the space | gap part 8 comprised with the slit diagonally.

  Further, as shown in FIG. 25, a magnetic flux path is provided in a region facing the slot 4 of the bottom iron core 15 that connects the protrusion 10a, the protrusion 10b, and the protrusion 10c of the first iron core portion 1 having an E shape. You may provide the space | gap part 8 comprised with the slit in the direction to prevent.

  In addition, as shown in FIG. 26, in a region facing the bottom core 15 that connects the protrusion 10a, the protrusion 10b, and the protrusion 10c of the first iron core 1 having an E shape, and the central protrusion 10b. You may provide the space | gap part 8 comprised with the slit in the direction which blocks | prevents the path | route of magnetic flux.

  Further, as shown in FIG. 27, the bottom iron core 15 that connects the protrusion 10a, the protrusion 10b, and the protrusion 10c of the first iron core 1 having an E shape, and the protrusions 10a and 10c on both sides You may provide the space | gap part 8 comprised with the slit diagonally in the direction which blocks | prevents the path | route of magnetic flux in the area | region which opposes.

  In the above description, the example in which the iron core of the reactor 20 is formed by the combination of the first iron core portion 1 having an E shape and the second iron core portion 2 having an I shape has been described. The iron core of the reactor 20 may be formed by a combination of iron cores.

FIG. 5 shows the first embodiment, and is a perspective view of a reactor 20. FIG. 5 shows the first embodiment and is a cross-sectional view of a reactor 20. FIG. 5 is a cross-sectional view showing the magnetic circuit of the reactor 20 according to the first embodiment. FIG. 5 shows the first embodiment, and is a cross-sectional view showing a method for assembling the reactor 20. FIG. 5 is a diagram illustrating the first embodiment and is a diagram illustrating frequency characteristics of vibration of the reactor 20. It is a figure which shows Embodiment 1, and is sectional drawing of the reactor 20 of a modification. It is a figure which shows Embodiment 1, and is sectional drawing of the reactor 20 of a modification. It is a figure which shows Embodiment 1, and is sectional drawing of the reactor 20 of a modification. It is a figure which shows Embodiment 1, and is sectional drawing of the reactor 20 of a modification. It is a figure which shows Embodiment 1, and is sectional drawing of the reactor 20 of a modification. It is a figure which shows Embodiment 1, and is sectional drawing of the reactor 20 of a modification. FIG. 5 shows the second embodiment and is a cross-sectional view of the reactor 20. It is a figure which shows Embodiment 2, and is sectional drawing of the reactor 20 of a modification. It is a figure which shows Embodiment 2, and is sectional drawing of the reactor 20 of a modification. It is a figure which shows Embodiment 2, and is sectional drawing of the reactor 20 of a modification. It is a figure which shows Embodiment 2, and is sectional drawing of the reactor 20 of a modification. It is a figure which shows Embodiment 2, and is sectional drawing of the reactor 20 of a modification. It is a figure which shows Embodiment 2, and is sectional drawing of the reactor 20 of a modification. It is a figure which shows Embodiment 2, and is sectional drawing of the reactor 20 of a modification. FIG. 5 shows the third embodiment and is a cross-sectional view of the reactor 20. It is a figure which shows Embodiment 3, and is sectional drawing of the reactor 20 of a modification. FIG. 10 is a diagram showing the fourth embodiment, and is a cross-sectional view of the reactor 20. It is a figure which shows Embodiment 4, and is sectional drawing of the reactor 20 of a modification. It is a figure which shows Embodiment 4, and is sectional drawing of the reactor 20 of a modification. It is a figure which shows Embodiment 4, and is sectional drawing of the reactor 20 of a modification. It is a figure which shows Embodiment 4, and is sectional drawing of the reactor 20 of a modification. It is a figure which shows Embodiment 4, and is sectional drawing of the reactor 20 of a modification.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 1st iron core part, 2nd 2nd iron core part, 3 winding, 4 slots, 5 insulation part, 6 contact part, 8 space | gap part, 8a constriction part, 10a protrusion part, 10b protrusion part, 10c protrusion part, 13 Thin core part, 14a 1st magnetic path, 14b 2nd magnetic path, 15 bottom iron core.

Claims (3)

A first iron core portion formed in an E shape, having a central protrusion, two protrusions at both ends, and a bottom iron core;
A second iron core portion attached to the first iron core portion;
A winding wound around a central protrusion formed on the first iron core;
An adhesion portion formed by attaching at least part of the end surfaces of the two protrusions at both ends of the first iron core and the end surface of the central protrusion of the first iron core to the second iron core. When,
A central protrusion of the first iron core, a part of the second iron core, a protrusion at one end of the first iron core, and a bottom iron core of the first iron core; A first magnetic path composed of a portion,
A central protrusion of the first iron core, a part of the second iron core, a protrusion at the other end of the first iron core, and a bottom iron core of the first iron core; A second magnetic path composed of a portion,
Transition to the vicinity of the close contact portion or the bottom iron core of the first magnetic path and the second magnetic path, or the common magnetic path of the first magnetic path and the second magnetic path And a void portion for adjusting magnetic saturation characteristics formed in the vicinity of the portion and formed by a long hole or a slit. A first iron core portion formed in an E shape and having a central protrusion, two protrusions at both ends, and a bottom iron core;
A second iron core portion attached to the first iron core portion;
A winding wound around a central protrusion formed on the first iron core;
A close contact portion formed by attaching an end surface of the protrusion of the first core portion to the second core portion;
It is provided in the central protrusion of the first iron core and is divided into three or more, and the gap length of the center is smaller than other gap lengths, and is orthogonal to the longitudinal direction of the center protrusion. And a void portion for adjusting magnetic saturation characteristics formed by a long hole or a slit in the direction. A first iron core portion formed in an E shape and having a central protrusion, two protrusions at both ends, and a bottom iron core;
A second iron core portion attached to the first iron core portion;
A winding wound around a central protrusion formed on the first iron core;
A close contact portion formed by attaching an end surface of the protrusion of the first core portion to the second core portion;
Provided in the central protrusion of the first iron core, and formed by a long hole or slit in a direction perpendicular to the longitudinal direction of the central protrusion, the gap length of the center being smaller than other gap lengths. A reactor for adjusting magnetic saturation characteristics.

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