JP2013115407A - Electrical apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrical apparatus which can reduce eddy current loss effectively and in which a compact tape wound core is manufactured at low cost and incorporated.SOLUTION: An electric apparatus (rotary electric machine 1000) includes a tape wound core 901 made of a soft magnetic body and formed by winding a magnetic ribbon having a plurality of opening groups comprising one or more opening parts, and a winding provided to a side face part of the tape wound core 901, and the magnetic ribbon has regions sectioned between the opening part groups and arrayed in the winding direction of the magnetic ribbon, a maximum size of the opening parts in the width direction of the magnetic ribbon being larger than a maximum size of the opening parts in the winding direction.

Description

  The present invention relates to an electric device incorporating a wound magnetic core using a magnetic ribbon.

  Winding iron cores (winding magnetic cores) are very commonly applied to rotating equipment such as motors and electrical equipment such as transformers and reactors. However, if a wound magnetic core formed by winding a magnetic ribbon (magnetic ribbon) is used as it is, eddy current loss occurs due to the influence of magnetic flux. Several techniques are known for reducing eddy current losses.

  Patent Document 1 discloses a brushless motor in which a band-shaped core is wound around the outer periphery of a cylindrical coil to form a stator, a permanent magnet rotor is provided, and a long slit is formed in the band-shaped core in the winding direction. ing. In this brushless motor, the slit is effective in reducing the eddy current loss, and when the coil is wound around the cylindrical coil, the sticking agent enters the slit, so that the holding power of the cylindrical coil can be improved. Have been described.

  Patent Document 2 has a stator in which a stator winding is wound on a stator core formed by winding a ribbon-shaped amorphous metal, and a rotor having a permanent magnet. An axial gap motor having a slit in a stator core is disclosed.

  Furthermore, Patent Document 3 has a configuration in which eddy currents are blocked by forming adjacent slits (or apertures) that are separated from each other by an edge portion from an end portion of a belt-shaped body made of a magnetic material and separated from each other. A yoke is disclosed.

JP 58-58845 A JP 2009-284578 A Japanese Patent Publication No.62-26257

  The slit described in Patent Document 1 has an effect of reducing eddy current loss caused by magnetic flux orthogonal to the side surface of the belt-shaped core (winding core), but about eddy current loss caused by magnetic flux in other directions. There is no effect to reduce. Therefore, eddy current loss increases when used as a rotating machine.

  The stator core having a slit described in Patent Document 2 is manufactured by a process of providing an eddy current preventing slit in a stator core formed by winding a ribbon-like amorphous metal. Since ribbon-like amorphous metal is very hard, the process of providing the eddy current prevention slits takes a long time and the jig is consumed quickly, which increases the manufacturing cost.

  Since the yoke described in Patent Document 3 has an adjacent slit having a configuration in which only the edge portion is separated from the end of the belt-like body, the yoke is generated in the circumferential direction at the bottom surface of the yoke when applied to an axial gap motor. It is difficult to prevent eddy currents. In addition, since this yoke has a slit dimension that is long in the winding direction, when applied to an axial gap motor, the function based on the axial continuity of the cylindrical yoke is reduced by the dimension of the slit in the winding direction. End up. In other words, it becomes necessary to increase the number of windings of the belt-like body, and the volume of the yoke increases.

  An object of the present invention is to provide an electric device that can effectively reduce eddy current loss, manufactures a compact wound magnetic core at low cost, and incorporates the same.

  The present invention includes a wound magnetic core formed by winding a magnetic ribbon made of a soft magnetic material and having a plurality of opening groups each formed of one or more openings, and a winding provided on a side surface of the wound magnetic core. In the electric device, the magnetic ribbon is provided between the opening groups and is provided with a region arranged in the winding direction of the magnetic ribbon, and the maximum dimension of the opening in the width direction of the magnetic ribbon is in the winding direction of the opening. Make it larger than the maximum dimension.

  According to the present invention, an eddy current loss can be reduced and a compact wound core can be easily manufactured. And the compact electric equipment which incorporates this winding magnetic core can be manufactured at low cost.

It is an expansion | deployment perspective view which shows the magnetic ribbon of an Example, and a cylindrical wound magnetic core using the same. It is an expansion | deployment perspective view which shows the magnetic ribbon of an Example, and a cylindrical wound magnetic core using the same. It is an expansion | deployment perspective view which shows the magnetic ribbon which has two slits in the width direction, and a cylindrical wound magnetic core using the same. It is an expansion | deployment perspective view which shows the magnetic ribbon which has two slits in the width direction, and a cylindrical wound magnetic core using the same. It is an expansion | deployment perspective view which shows the magnetic ribbon which has two slits in the width direction, and a cylindrical wound magnetic core using the same. It is an expansion | deployment perspective view which shows the magnetic ribbon which has two slits in the width direction, and a cylindrical wound magnetic core using the same. It is an expansion | deployment perspective view which shows the magnetic ribbon which has two slits in the width direction, and a cylindrical wound magnetic core using the same. It is an expansion | deployment perspective view which shows the magnetic ribbon which provided the curvature in the edge part of a slit, and the fan-shaped winding core using this. It is an expansion | deployment perspective view which shows the magnetic ribbon which provided the curvature in the edge part of a slit, and the fan-shaped winding core using this. It is an expansion | deployment perspective view which shows the square columnar winding magnetic core which set the space | interval of a slit so that a slit may overlap when it winds. It is an expansion | deployment perspective view which shows the magnetic ribbon which has six slits in the width direction, and a cylindrical wound magnetic core using the same. It is an expansion | deployment perspective view which shows the magnetic ribbon which has four diagonal slits in the width direction, and a cylindrical wound magnetic core using the same. It is an expansion | deployment perspective view which shows the magnetic ribbon which has four slits in the width direction, and a cylindrical wound magnetic core using the same. It is an expansion | deployment perspective view which shows the magnetic ribbon which has five elliptical slits in the width direction, and a cylindrical wound magnetic core using the same. It is a perspective view which shows an example of the local eddy current which arises in the conventional cylindrical winding core which does not have a slit. It is a perspective view which shows an example of the local eddy current which arises in the cylindrical winding core comprised with the magnetic ribbon which a slit has. It is a perspective view which shows the other example of the local eddy current which arises in the cylindrical wound magnetic core comprised with the magnetic ribbon which a slit has. It is an expansion | deployment perspective view which shows the magnetic ribbon which has six elliptical slits in the width direction, and a cylindrical wound magnetic core using the same. It is sectional drawing which shows the motor which incorporated the cylindrical wound magnetic core. It is a perspective view which shows the inside of the rotary electric machine of Example 1. FIG. FIG. 19B is a developed perspective view showing the wound magnetic core 901 of FIG. 19A. It is a perspective view which shows the rotary electric machine of Example 2. FIG. It is a disassembled perspective view which shows the rotary electric machine of Example 2. FIG. It is a perspective view which shows the transformer of Example 3. FIG. FIG. 22B is a perspective view showing the wound magnetic core 970 of FIG. 22A. It is a disassembled perspective view which shows the transformer of Example 3. FIG.

  Hereinafter, an electric device and a method for manufacturing the same according to an embodiment of the present invention will be described.

  The electrical device is formed by winding a magnetic ribbon having a plurality of openings (also referred to as “slit sets”) made of a soft magnetic material and including one or more openings (also referred to as “slits”). A magnetic core and a winding provided on a side surface portion of the wound magnetic core, the magnetic ribbon having a region that is divided between the opening groups and arranged in the winding direction of the magnetic ribbon, The maximum dimension of the opening in the width direction of the magnetic ribbon is larger than the maximum dimension in the winding direction of the opening.

  In the electric device, it is desirable that the maximum dimension in the winding direction of the region is larger than the maximum dimension in the winding direction of the opening.

  In the electric device, it is preferable that the region has an adjacent region adjacent in the winding direction, and the region and the adjacent region are connected via at least one connection part of the opening group.

  In the electric device, it is desirable that the end of the opening has a curvature.

  In the electric device, it is desirable that the long axis, which is the maximum dimension of the opening, is longer than the minimum dimension of the connection part.

  In the electric device, it is desirable that the opening has a rectangular shape, a rounded rectangular shape, an elliptical shape, a rhombus shape, or a triangular shape.

  In the electric device, it is desirable that the connection portion is provided at an end portion in the width direction of the magnetic ribbon.

  In the electric device, it is desirable that the opening reaches the end in the width direction of the magnetic ribbon.

  In the electric device, it is desirable that the extension line of the long axis of the opening is orthogonal to the axis in the winding direction.

  In the electrical apparatus, it is desirable that a magnetic material is installed in the hollow portion of the wound magnetic core.

  In the electric device, it is desirable that a high thermal conductor is installed in the hollow portion of the wound magnetic core.

  In the electrical device, a rotor including a winding core and a winding provided on a side surface of the winding core, and a rotor, the rotor is disposed in the axial direction of the stator, It is desirable to provide a gap between the stator and the rotor.

  In the electrical apparatus, it is preferable that the winding induction core includes a winding core and a winding provided on a side surface portion of the winding core, and the winding core is magnetically connected to the yoke.

  The method for manufacturing the electrical device includes a wound magnetic core formed by winding a magnetic ribbon having a plurality of aperture groups each made of a soft magnetic material and including one or more apertures, and a winding provided on a side surface of the wound magnetic core. A step of forming an opening, a step of winding a magnetic ribbon to form a winding core, a step of installing a winding on a side surface of the winding core, and a winding And a step of incorporating a combination part of a wire and a wound core into another component.

  Embodiments will be described below with reference to the drawings.

  In the present embodiment, a wound magnetic core (winding iron core) is applied to an axial gap type rotating electrical machine.

  FIG. 19 is a cross-sectional view showing a motor (axial gap type rotating electrical machine) incorporating a cylindrical wound magnetic core.

  In this figure, a motor 800 (axial gap motor), which is a kind of axial gap type rotating electrical machine, is composed of a rotor yoke 806 fixed to a rotating shaft 804 and a stator fixed to a housing 808 via a stator fixing portion 805. ing. A magnet 803 is fixed to the rotor yoke 806. The stator includes a wound magnetic core 801, a coil 802, and a bearing holder 810, and supports a rotating shaft 804 via a bearing 809. A winding center axis of the winding magnetic core 801 is installed in a direction parallel to the rotation axis direction of the rotation shaft 804. The stator is installed between the two rotor yokes 806. For this reason, the wound magnetic core 801 included in the stator is located between the two magnets 803.

  Therefore, the magnetic field generated by the magnet 803 is mainly generated in the direction of the rotation axis of the rotary shaft 804 and is generated in the direction of the winding center axis of the winding core 801.

  Since the magnetic ribbon constituting the wound magnetic core 801 has slits in the width direction of the magnetic ribbon, eddy current loss generated inside the wound magnetic core 801 is suppressed.

  FIG. 20A is an exploded perspective view showing the inside of the rotating electrical machine.

  In this figure, a rotating electrical machine 1000 (axial gap motor) includes a plurality of stators (stator) including a wound magnetic core 901 (stator core) and a coil 902 (winding), a rotor yoke 912 (rotor core), and a magnet. And a rotor 910 (rotor) including 911 (permanent magnet). The plurality of stators are arranged in the circumferential direction around the rotation axis. A coil 902 is formed on the side surface of the wound core 901.

  The winding core 901 and the coil 902 are fixed to a housing (not shown) by a mold resin (not shown) or another member. The magnet 911 of the rotor 910 is disposed and fixed to the rotor yoke 912 in the circumferential direction around the rotation axis. The plurality of stators are arranged so as to be sandwiched between the two rotors 910 from the direction of the rotation axis. Rotor yoke 912 is coupled to an output shaft (not shown).

  20B is an exploded perspective view showing the cylindrical wound magnetic core (stator core) of FIG. 20A in an enlarged manner.

  In this figure, the wound core 901 is obtained by winding the magnetic ribbon 100. The magnetic ribbon 100 is formed with a rectangular slit 200 that intersects the winding direction.

  Next, the operation of the rotating electrical machine of this embodiment will be described.

  When the coil 902 is energized, the stator generates a rotating magnetic field. The rotor 910 rotates around the rotation axis by attracting and repelling the magnetic field by the magnet 911, which is a permanent magnet, and the rotating magnetic field. An alternating magnetic field in a direction parallel to the rotation axis is generated inside the winding core 901. At this time, an eddy current flows on the end face of the wound magnetic core 901 in a direction to cancel the alternating magnetic field. Since the winding core 901 of this embodiment is provided with the slit 200, the electrical resistance of the eddy current flowing in the circumferential direction of the winding core 901 is increased, and the eddy current is significantly suppressed.

  Note that the wound magnetic core 901 has an effect of reducing eddy currents even with respect to a magnetic field other than the magnetic field in the rotation axis direction. That is, by providing a long slit 200 in a direction intersecting with the winding direction of the magnetic ribbon 100, it is possible to reduce eddy current loss caused by the influence of magnetic flux generated by a magnetic field perpendicular to the laminated surface.

  The cross-sectional shape of the wound core is not limited to a cylindrical shape. By using a rectangular shape (rectangular shape) or a substantially fan shape, it is possible to densely arrange the winding core 901 and the coil 902 in a region that houses the stator.

  Further, the direction of the long axis (maximum dimension) of the slit 200 is not limited to the width direction of the magnetic ribbon 100. It only has to intersect with the winding direction of the magnetic ribbon 100 (longitudinal direction of the magnetic ribbon 100).

  FIG. 21 is a perspective view showing the rotating electrical machine (axial gap type rotating electrical machine) of the present embodiment.

  In this figure, it demonstrates centering on a different point from Example 1. FIG.

  A rotating electrical machine 1100 (axial gap motor) includes a plurality of wound cores 901 (stator core), a plurality of coils 902 (windings), and a stator (stator) that supports a plurality of wound cores 901. ) And a rotor 910 (rotor). The plurality of wound magnetic cores 901 are arranged in the circumferential direction around the rotation axis of the rotor 910 and fixed to constitute a teeth portion of the stator. A coil 902 is formed on the side surface of the wound core 901. The winding core 901 is fixed to the yoke 913. The winding core 901 and the yoke 913 are configured to face the surface of the rotor 910 on which the magnet is provided.

  The stator of rotating electric machine 1100 includes a tooth portion formed of a wound magnetic core 901, a yoke 913 magnetically coupled to the tooth portion, and a coil 902. The yoke 913 is fixed to a housing (not shown).

  The rotor 910 includes a plurality of permanent magnets and a rotor core that are arranged in the circumferential direction around the rotation axis, and is arranged to face the stator. The rotor core is coupled to an output shaft (not shown). The teeth portion of the stator is composed of a wound magnetic core 901 formed by winding a magnetic ribbon having slits that intersect with the winding direction. The yoke 913 is formed of a magnetic iron core.

  FIG. 22 is a perspective view showing a state in which the rotating electrical machine of FIG. 21 is disassembled.

  In FIG. 22, a plurality of recesses 905 are provided in the yoke 913, and a piece 904 is inserted and fixed in these recesses 905 (recesses). One piece 904 is inserted into a hollow portion of one winding core 901 and fixed. The piece 904 may be a winding jig (core) of the winding magnetic core 901. When the piece 904 is made of a magnetic material such as a dust core, the winding core 901 and the piece 904 constitute a tooth portion, so the amount of soft magnetic material is increased compared to the case where only the winding core 901 is a soft magnetic material. To do. For this reason, the magnetic flux density of the teeth part that supports the coil 902 can be increased. As a result, the rotating electrical machine 1200 can be reduced in size and output.

  Next, the operation of the rotating electrical machine of this embodiment will be described.

  When the coil 902 is energized, the stator generates a rotating magnetic field. The rotor rotates around the rotation axis by attraction and repulsion between the magnetic field generated by the permanent magnet and the rotating magnetic field. An alternating magnetic field in a direction parallel to the rotation axis is generated inside the winding core 901. At this time, an eddy current flows through the end portion of the wound magnetic core 901 in a direction to cancel the alternating magnetic field. Since the winding core 901 of this embodiment is provided with a slit, the electrical resistance of the eddy current flowing in the circumferential direction of the winding core 901 is increased, and the eddy current is significantly suppressed.

  The shape of the wound magnetic core 901 is not limited to that shown in FIGS. This is the same as in the first embodiment.

  An example in which the wound magnetic core is used in a transformer which is a static induction electric device will be described.

  FIG. 23A is a perspective view illustrating a transformer according to an embodiment. FIG. 23B is a perspective view showing the wound magnetic core of FIG. 22A.

  In FIG. 23A, a transformer 1300 includes a magnetic core portion (core portion) including a yoke 950 (a yoke portion) and a wound magnetic core 970, and two sets of coils 960 (windings) wound around the magnetic core portion. It is the structure containing these.

  One set of coils 960 is composed of two phases, a low pressure side and a high pressure side. The coil 961, which is a low-voltage side winding, has a smaller number of turns than the coil 962, which is a high-voltage side winding.

  The wound magnetic core 970 is formed by winding a magnetic ribbon having slits shown in FIG. 23B intersecting with the winding direction. The two wound magnetic cores 970 are magnetically connected by a yoke 950 made of a rectangular parallelepiped laminated steel plate 951.

  Next, operation | movement of the transformer of a present Example is demonstrated.

  At the time of boosting, an alternating current is applied to the coil 961 on the low voltage side. As a result, magnetic flux is induced inside the wound core 970. This magnetic flux causes an induced current to flow through the high voltage side coil 962. Since the number of turns of the coil 962 is larger than that of the coil 961, a voltage higher than the input can be output. When stepping down, the reverse operation is performed.

  FIG. 24 is an exploded perspective view showing the transformer of the present embodiment.

  In this figure, the transformer 1400 is configured such that a recess 985 (recess) is provided in a yoke 980 (relay part) and a piece 984 is inserted. The piece 984 is inserted into the hollow portion of the winding core 970, and the end of the piece 984 is inserted into the recess 985 and fixed. Two sets of coils 960 are installed on the side surface of the winding core 970. Thereby, the wound magnetic core 970 can be positioned and fixed to the yoke 980.

  The piece 984 may be a winding jig of the winding magnetic core 970. When the piece 984 is formed of a magnetic material such as a dust core, the amount of the soft magnetic material in the tooth portion increases, so that it can be operated at a higher magnetic flux density. As a result, the transformer can be reduced in size and output.

  In the present embodiment, an example of a magnetic ribbon (magnetic ribbon) having a slit intersecting with the winding direction (winding direction) and a cylindrical wound magnetic core formed by winding the ribbon will be described.

  FIG. 1 is a developed perspective view showing a magnetic ribbon of an embodiment and a cylindrical wound core using the same.

  In this figure, a wound core 300 is formed by winding a magnetic ribbon 100. The magnetic ribbon 100 has a plurality of slits 200 arranged at equal intervals in the winding direction. The slit 200 has a rectangular shape that is long and continuous in the width direction of the magnetic ribbon 100, and the extended side of the long side or the long axis of the slit 200 is with respect to the winding axis of the magnetic ribbon 100 (the end in the winding direction). Orthogonal.

  In other words, in this drawing, the magnetic ribbon 100 has two connection portions between the slit 200 and both end portions in the width direction of the magnetic ribbon 100, and is connected in the winding direction.

  The major axis of the slit 200 is the maximum dimension of the slit 200. The maximum dimension of the slit 200 in the direction perpendicular to the major axis is defined as the minor axis of the slit 200. Therefore, in the case of the rhomboid, elliptical shape, etc., the short axis corresponds to the dimension of the central part of the slit, and in the case of the gourd shape in which the central part of the slit is constricted, the dimensions other than the central part of the slit are applicable. Become.

  Generally, when the wound magnetic ribbon 100 is used as a wound core 300 (iron core) of an electric device such as a rotating machine or a stationary machine, eddy current loss occurs due to a change in magnetic flux. It is known that eddy current loss of the wound core 300 can be reduced by slitting the magnetic ribbon 100. However, in rotating machines and stationary machines, magnetic flux is generated in multiple directions due to the influence of the main magnetic flux and leakage magnetic flux, so it is necessary to reduce the eddy current loss that occurs with this magnetic flux.

  In the magnetic ribbon 100 of the present embodiment, by providing the slit 200 in a direction crossing the winding direction, the magnetic flux penetrating the wound magnetic core 300, the component orthogonal to the laminated surface of the magnetic ribbon 100 and the laminated surface Most of the eddy current loss generated by the influence of the parallel components can be reduced.

  In this drawing, the slit 200 orthogonal to the width direction is shown, but the present invention is not limited to this, and it is sufficient that the extension line of the slit 200 intersects the winding direction axis.

  FIG. 2 is an example of a magnetic ribbon having oblique slits.

  In this figure, the wound core 300 is formed by winding a magnetic ribbon 102. The magnetic ribbon 102 has a plurality of slits 201 arranged at equal intervals in the winding direction. The slit 201 has a rectangular shape that is long and continuous in the width direction of the magnetic ribbon 102, and the long side or long axis extension line of the slit 201 intersects obliquely with respect to the winding direction axis of the magnetic ribbon 102.

  In other words, in this drawing, the magnetic ribbon 102 has two connection portions between the slit 201 and both ends in the width direction of the magnetic ribbon 102, and is connected in the winding direction.

  The long axis of the slit 201 is equal to the long side in the case of a rectangular shape. The short axis of the slit 201 is equal to the short side in the case of a rectangular shape. Further, the maximum dimension in the width direction of the slit 201 is larger than the maximum dimension in the winding direction. By reducing the short side of the slit 201 or making the maximum dimension in the winding direction smaller than the maximum dimension in the width direction, the apparent density of the wound core 300 having the slit 201 can be increased, and the vortex can be effectively reduced. Current can be suppressed.

  The pitch of the slit 201 can be freely changed. The slits 201 may be arranged periodically densely in the winding direction of the magnetic ribbon 102, or may be equally spaced.

  In this embodiment, the slit 201 is formed before the magnetic ribbon 102 is wound. In general, since the magnetic ribbon 102 is thin, the slit 201 can be easily processed. For example, the thickness of the amorphous magnetic ribbon 102 is desirably about 0.025 mm. The thickness of the electrical steel sheet is preferably 0.5 mm or less. In the case of a laminated body in which the magnetic ribbons 102 are laminated, it becomes difficult to process the slits, and the processing cost increases.

  The length and width of the slit 201 of the magnetic ribbon 102 and the pitch between the slits 201 can be freely changed according to the specifications of the product to be applied.

  Examples of the processing method of the slit 201 include press punching, etching, electric discharge processing, water jet cutting, laser processing, and the like. The processing method varies depending on the material and characteristics of the magnetic material.

  According to this embodiment, a low-cost and low iron loss magnetic ribbon can be obtained.

  Further, when the slit 201 is put in the magnetic ribbon 102, the slits 201 may be processed one by one, or several sheets may be stacked.

  Further, when the slit 201 is processed, it is preferable to process the both sides of the magnetic ribbon 102 with a jig. This is particularly preferable when the magnetic ribbon 102 is amorphous. This is because amorphous is easy to break and it is possible to prevent the crack of the magnetic ribbon 102 from progressing.

  The wound magnetic core 300 is not limited to an amorphous material such as an electromagnetic steel plate or ferrite as long as it is a thin plate-like magnetic body.

  In the hollow portion of the wound core 300, a piece that substantially matches the inner peripheral shape may be provided. By making this piece convex or concave from the end face of the wound core 300, it can be used for positioning the wound core 300. In this case, the mold for molding the stator is also provided with a corresponding recess or projection. When positioning is performed on the outer periphery of the winding core 300, the winding space is reduced by the amount corresponding to the mold jig portion. On the other hand, the above positioning method effectively utilizes the dead space of the wound magnetic core 300 and can perform positioning without causing a decrease in performance.

  Further, the piece of the hollow portion of the wound magnetic core 300 may be a magnetic body such as a dust core. Since the amount of the magnetic material in the entire core increases, the magnetic flux density can be increased. This makes it possible to increase the efficiency, size and output of the rotating electrical machine. Suitable magnetic materials include iron, silicon steel, Fe-Ni alloy permalloy, Fe-Si-Al alloy Sendust, Fe-Co alloy permendur, and soft ferrite. is there.

  Furthermore, you may comprise a piece with a high heat conductor.

  Thereby, since heat dissipation improves, the efficiency, size reduction, and output increase of a rotary electric machine are attained.

  As materials for high thermal conductors, soft magnetic materials such as iron, silicon steel, Fe-Ni alloy permalloy, Fe-Si-Al alloy sendust, Fe-Co alloy permendur, and soft ferrite are suitable. From the viewpoint of heat conductivity, metals such as copper, silver, gold and brass are also suitable.

  The number of slits 201 adjacent in the width direction is not particularly limited. In the region where the slits 201 adjacent to each other in the width direction are arranged, the magnetic ribbon 102 may be connected at least at one place in the winding direction.

  FIG. 3 shows an example in which two slits in the same direction adjacent in the width direction are provided.

  In this figure, a wound core 300 is formed by winding a magnetic ribbon 103. The magnetic ribbon 103 has two slits 202 in the same direction adjacent to each other in the width direction. The slits 202 are arranged at equal intervals in the winding direction of the magnetic ribbon 103 as a group (slit set) of two adjacent in the width direction of the magnetic ribbon 103. The slit 202 has a rectangular shape that is long in the width direction of the magnetic ribbon 103, and the extended line of the long side (long axis) of the slit 202 is orthogonal to the winding direction axis of the magnetic ribbon 103. A connecting portion 701 is provided between the two slits 202.

  In other words, in this figure, the magnetic ribbon 103 has a total of three connection portions between the slits 202 adjacent in the width direction and between the slit 202 and both ends of the magnetic ribbon 103 in the width direction, It is connected to the winding direction.

  If the magnetic ribbon 103 is completely cut, the winding process becomes difficult. For this reason, it is preferable that it is connected at least in one place. Further, when the slit 202 is inserted in a direction intersecting with the winding direction, the magnetic ribbon 103 is easily cut by a tensile force in the winding process. Increasing the number of slits 202 in the same direction is preferable from the viewpoint of the strength of the magnetic ribbon 103 because the number of portions where the magnetic ribbon 103 is connected increases.

  FIG. 4 is an example of a magnetic ribbon having two oblique slits.

  In this figure, the wound core 300 is formed by winding a magnetic ribbon 104. The magnetic ribbon 104 has two slits 203 in the same direction adjacent to each other in the width direction. The slits 203 are arranged at equal intervals in the winding direction of the magnetic ribbon 104 as a group of two adjacent to the width direction of the magnetic ribbon 104. The slit 203 has a rectangular shape that is long in the width direction of the magnetic ribbon 104, and the extended line of the long side (long axis) of the slit 203 intersects obliquely with respect to the axis in the winding direction of the magnetic ribbon 104. A connecting portion 702 is provided between the two slits 203. Among the adjacent ends of the two slits 203, the shortest distance from one end to the other slit 203, that is, a perpendicular line from the one end to the other slit 203 is expressed as “the minimum dimension of the connecting portion 702”. "

  In other words, in this figure, the magnetic ribbon 104 has a total of three connection portions between the slits 203 adjacent in the width direction and between the slit 203 and both ends of the magnetic ribbon 104 in the width direction, It is connected to the winding direction. The connecting portion between the slits 203 adjacent to each other in the width direction of the magnetic ribbon 104 is relatively wide.

  FIG. 5 shows an example of a magnetic ribbon having two slits in the same direction in the width direction, where the slit reaches the end in the width direction.

  In this figure, the wound magnetic core 300 is formed by winding a magnetic ribbon 105. The magnetic ribbon 105 has two slits 204 in the same direction adjacent to each other in the width direction. The slits 204 are arranged at equal intervals in the winding direction of the magnetic ribbon 105 with a group of two adjacent in the width direction of the magnetic ribbon 105 as a group. The slit 204 has a rectangular shape that is long in the width direction of the magnetic ribbon 105, and reaches the end of the magnetic ribbon 105 in the width direction. A connecting portion 703 is provided between the two slits 204. The shortest distance between the adjacent ends of the two slits 204 is referred to as the minimum dimension of the connection portion 703.

  In other words, in this drawing, the magnetic ribbon 105 has a connecting portion only between the slits 204 adjacent in the width direction and is connected in the winding direction. In this example, the length of the connecting portion in the width direction is increased so that the magnetic ribbon 105 is not cut at the connecting portion.

  FIG. 6 shows an example in which two slits in the same direction adjacent to the width direction of the magnetic ribbon are used, and the slit length is changed.

  In this figure, the wound core 300 is formed by winding a magnetic ribbon 106. The magnetic ribbon 106 has two slits 202 in the same direction that are adjacent in the width direction. The lengths of the long sides (major axes) of the two adjacent slits 202 are different from each other. The slits 202 are arranged at equal intervals in the winding direction of the magnetic ribbon 106 as a group of two adjacent in the width direction of the magnetic ribbon 106. The slit 202 has a rectangular shape that is long in the width direction of the magnetic ribbon 106, and the extended line of the long side of the slit 202 is orthogonal to the axis in the winding direction of the magnetic ribbon 106.

  In other words, in this figure, the magnetic ribbon 106 has a total of three connection portions between the slits 202 adjacent in the width direction and between the slit 202 and both ends of the magnetic ribbon 106 in the width direction, It is connected to the winding direction.

  In the example of this figure, since the lengths of the long sides of the two adjacent slits 202 are different, the position in the width direction (distance from the end) of the connecting portion of the magnetic ribbon 106 is different. For this reason, the strength in the winding direction of the magnetic ribbon 106 can be improved.

  FIG. 7 shows an example of a magnetic ribbon in which the directions of the long sides of the slits constituting adjacent slit sets are different. That is, this is an example in which the direction of the long side of the slit is not uniform.

  The magnetic ribbon 107 shown in the figure includes a slit set in which the extension of the long side (major axis) of two adjacent slits 202 is perpendicular to the winding direction axis of the magnetic ribbon 107, and the winding direction Slit sets that intersect at an angle with respect to the axis are alternately provided adjacent to each other. In other words, the slit sets of FIGS. 3 and 4 are provided alternately adjacent to each other.

  In the above example, the case where the slit sets are arranged at equal intervals in the winding direction of the magnetic ribbon is shown, but the present invention is not limited to this, and the slit sets may be arranged so that the intervals of the slit sets are different from each other.

  In this embodiment, a fan-shaped (triangular prism-shaped) winding core will be described.

  FIG. 8 shows an example in which a fan-shaped wound core is formed using a magnetic ribbon provided with a slit having an arcuate end.

  In this figure, the wound core 310 is constituted by winding a magnetic ribbon 108. The magnetic ribbon 108 has two slits 202 in the same direction adjacent to each other in the width direction. The lengths of the long sides of the two adjacent slits 202 are different from each other. The slits 202 are arranged at equal intervals in the winding direction of the magnetic ribbon 108 as a group (slit set) of two adjacent in the width direction of the magnetic ribbon 108. The slit 202 has a rounded rectangular shape (race track shape) that is long in the width direction of the magnetic ribbon 108 and has a short side formed by an arc 205. The extended line of the long side of the slit 202 is in the winding direction of the magnetic ribbon 108. Orthogonal to the axis.

  The winding core 310 is not limited to a fan shape, and other shapes can be applied. As in the first embodiment, before winding the magnetic ribbon 108, a slit 202 that intersects the winding direction is provided at a predetermined position. The longer the slit 202 is, the greater the effect of reducing eddy current loss, but the strength of the magnetic ribbon 108 becomes worse. Here, by providing the angle R at the end of the slit 202, the tensile stress at the time of winding can be relaxed. The angle R can be provided at both ends or one end of the slit. The shape and dimensions of the angle R are not limited.

  FIG. 9 shows an example in which the shape of the end of the slit is changed in the fan-shaped winding core shown in FIG.

  In this figure, an arc 206 wider than the width of the slit 202 is provided at the end of the slit 202 of the magnetic ribbon 109.

  In the first and second embodiments, the slit pitch (distance between the slits) is made equal, but is not limited to this, and may be changed in the winding direction.

  In the present embodiment, an example will be described in which the slit is overlapped at a specific position of the wound core.

  In the case of a columnar wound magnetic core having a polygonal shape such as a triangle or a quadrangle, or a bottom shape such as a sector shape, stress tends to concentrate at a portion (corner) where the magnetic ribbon is bent. If a slit is provided in this part, the stress can be relieved, so that the winding core can be easily manufactured.

  FIG. 10 shows an example of a quadrangular cylindrical core.

  In this figure, the wound magnetic core 320 is constituted by winding a magnetic ribbon 110. The slit 200 of the magnetic ribbon 110 is a rectangular shape that is long and continuous in the width direction of the magnetic ribbon 110, and the extended line of the long side of the slit 200 is with respect to the winding direction axis (end of the winding direction) of the magnetic ribbon 110. Orthogonal. The slits 200 are provided at intervals so as to overlap portions corresponding to the four corners of the rectangle that is the shape of the bottom of the quadrangular prism when the wound magnetic core 320 is formed by winding.

  In this embodiment, a wound magnetic core in which three or more slits are included in one slit set will be described.

  FIG. 11 shows an example in which a cylindrical wound core is formed using a magnetic ribbon in which six slits are included in one slit set.

  In this figure, the wound magnetic core 300 is formed by winding a magnetic ribbon 111. The magnetic ribbon 111 has six slits 211 in the same direction adjacent to each other in the width direction. The long sides of the six adjacent slits 211 are equal in length. The slits 211 are arranged at equal intervals in the winding direction of the magnetic ribbon 111, with six adjacent to the width direction of the magnetic ribbon 111 as a group (slit set). The slit 211 has a rectangular shape that is long in the width direction of the magnetic ribbon 111, and the extended line of the long side of the slit 211 is orthogonal to the axis in the winding direction of the magnetic ribbon 111.

  In this figure, the magnetic ribbon 111 has a total of seven connection portions between the slits 211 adjacent in the width direction and between the slit 211 and both ends of the magnetic ribbon 111 in the width direction, and in the winding direction. linked.

  FIG. 12 shows an example in which a cylindrical wound magnetic core is formed using a magnetic ribbon in which four slits are included in one slit set.

  In this figure, the wound magnetic core 300 is configured by winding a magnetic ribbon 112. The magnetic ribbon 112 has four slits 212 in the same direction adjacent to each other in the width direction. The long sides of the four adjacent slits 212 have the same length. The slits 212 are arranged at equal intervals in the winding direction of the magnetic ribbon 112 with a group of four adjacent in the width direction of the magnetic ribbon 112 (slit set). The slit 212 has a rectangular shape that is long in the width direction of the magnetic ribbon 112, and the extended line of the long side of the slit 212 intersects obliquely with respect to the axis in the winding direction of the magnetic ribbon 112.

  In this figure, the magnetic ribbon 112 has a total of five connection portions between the slits 212 adjacent to each other in the width direction and between the slit 212 and both ends of the magnetic ribbon 112 in the width direction. linked.

  FIG. 13 shows an example in which one slit set includes four slits, and two of the slits reach the end of the magnetic ribbon in the width direction.

  In this figure, the wound magnetic core 300 is configured by winding a magnetic ribbon 113. The magnetic ribbon 113 has four slits 213 and 223 in the same direction adjacent to each other in the width direction. These four slits 213 and 223 are arranged at equal intervals in the winding direction of the magnetic ribbon 113 as a set of slits. The slits 213 and 223 have a rectangular shape that is long in the width direction of the magnetic ribbon 113, and the slit 213 reaches the end of the magnetic ribbon 113 in the width direction.

  In other words, in this figure, the magnetic ribbon 113 has three connection portions between the slits 204 adjacent in the width direction, and is connected in the winding direction.

  FIG. 14 shows an example in which a cylindrical wound magnetic core is formed using a magnetic ribbon in which five slits are included in one slit set.

  In this figure, the wound magnetic core 300 is formed by winding a magnetic ribbon 114. The magnetic ribbon 114 has five elliptical slits 214 in the same direction adjacent to each other in the width direction. The long sides of the adjacent five slits 214 are equal in length. The slits 214 are arranged at equal intervals in the winding direction of the magnetic ribbon 114, with five adjacent to the width direction of the magnetic ribbon 114 as a group (slit set). The slit 214 has a rectangular shape that is long in the width direction of the magnetic ribbon 114, and the extended line of the long side of the slit 214 is orthogonal to the axis in the winding direction of the magnetic ribbon 114.

  In this figure, the magnetic ribbon 114 has a total of six connection portions between the slits 214 adjacent in the width direction and between the slit 214 and both ends in the width direction of the magnetic ribbon 114, and in the winding direction. linked.

  FIG. 18 shows an example in which a cylindrical wound magnetic core is formed using a magnetic ribbon in which six slits are included in one slit set.

  In this figure, the wound core 300 is formed by winding a magnetic ribbon 118. The magnetic ribbon 118 has six slits 251 and 252 in the same direction adjacent to each other in the width direction. Of the six slits 251 and 252, the two slits 251 located at the end in the width direction of the magnetic ribbon 118 reach the end. The four slits 252 are elliptical. The slit 251 has a similar elliptical shape and is partially cut off. The lengths of the long sides of the four adjacent slits 252 are equal.

  In this figure, the magnetic ribbon 118 has a total of five connecting portions between slits 251 and 252 adjacent in the width direction, and is connected in the winding direction.

  In addition, this invention is not limited to an above-described Example, Various modifications are included. For example, the above-described embodiments have been described in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the configurations described.

  Hereinafter, the function and effect of the present invention will be described.

  FIG. 15 shows an example of a local eddy current generated in a conventional cylindrical core having no slit.

  In this figure, when a magnetic field 351 that fluctuates in the direction of the central axis of a cylindrical winding core 360 is generated, a circumferential eddy current 315 is generated at the end of the winding core 360. When there is no slit as shown in this figure, the eddy current 315 flows so as to make one round in the circumferential direction of the wound magnetic core 360 without being blocked. Therefore, the path of the eddy current 315 becomes large and the eddy current loss is large.

  FIG. 16 shows an example of a local eddy current generated in a cylindrical wound magnetic core composed of a magnetic ribbon having a slit.

  In this figure, the wound core 300 is made of a magnetic ribbon, and the magnetic ribbon has a rectangular slit 200 that is long and continuous in the width direction.

  When a magnetic field 351 that fluctuates in the central axis direction of the cylindrical wound core 300 is generated, the circumferential eddy current 316 generated at the end of the wound core 300 is obstructed by the slit 200 and has a thin wall. In this magnetic ribbon, the flow is closed in a narrow area between two adjacent slits 200. Thereby, eddy current loss is suppressed.

  FIG. 17 shows another example of local eddy current generated in a cylindrical wound magnetic core composed of a magnetic ribbon having a slit.

  The configuration of the slit 200 of the wound magnetic core 300 shown in this figure is the same as that shown in FIG.

  When a magnetic field 352 that varies in the radial direction of the cylindrical wound core 300 is generated, the slit 200 is provided, so that the eddy current 317 generated on the side surface of the wound core 300 is blocked by the slit 200 and two adjacent magnetic cores 300 are adjacent to each other. The flow is closed in a narrow area between the slits 200.

  100, 102-114, 118: Magnetic ribbon, 200-206, 211-214, 223, 251, 252: Slit, 205, 206: Arc, 300, 310, 320: Winding core, 315-317: Eddy current, 351 , 352: magnetic field, 701 to 703: connection part, 800: motor, 801: winding core, 802: coil, 803: magnet, 804: rotating shaft, 805: stator fixing part, 806: rotor yoke, 808: housing, 809: Bearing, 810: Bearing holder, 901, 970: Winding core, 902, 960, 961, 962: Coil, 904, 984: Piece, 905, 985: Recess, 910: Rotor, 911: Magnet, 912: Rotor yoke, 913 , 950, 980: York, 951: Laminated steel plate, 1000, 1100, 1200: Rotating electric machine, 1300, 1400: Transformer.

Claims (14)

  An electric device including a wound magnetic core formed by winding a magnetic ribbon made of a soft magnetic material and having a plurality of opening groups each including one or more openings, and a winding provided on a side surface of the wound magnetic core. The magnetic ribbon has a region partitioned between the opening groups and arranged in the winding direction of the magnetic ribbon, and the maximum dimension of the opening in the width direction of the magnetic ribbon is the width of the opening. An electric device characterized by being larger than the maximum dimension in the winding direction.   The electric device according to claim 1, wherein a maximum dimension of the region in the winding direction is larger than a maximum dimension of the opening in the winding direction.   The area includes an adjacent area adjacent in the winding direction, and the area and the adjacent area are connected via at least one connection portion of the opening group. Or the electrical equipment of 2.   The electric device according to claim 1, wherein an end of the opening has a curvature.   5. The electrical device according to claim 3, wherein a major axis that is a maximum dimension of the opening is longer than a minimum dimension of the connection portion.   The electrical device according to claim 1, wherein the opening is rectangular, rounded rectangular, elliptical, diamond-shaped, or triangular.   The electrical device according to any one of claims 3 to 6, wherein the connection portion is provided at an end portion in a width direction of the magnetic ribbon.   The electrical device according to claim 1, wherein the opening reaches an end portion in a width direction of the magnetic ribbon.   The electrical apparatus according to any one of claims 1 to 8, wherein an extension line of a major axis of the opening is orthogonal to the axis in the winding direction.   The electrical apparatus according to any one of claims 1 to 9, wherein a magnetic body is installed in a hollow portion of the wound magnetic core.   The electric device according to claim 1, wherein a high thermal conductor is installed in a hollow portion of the wound magnetic core.   A rotating electrical machine including a stator including a winding core and a winding provided on a side surface of the winding core, and a rotor, wherein the rotor is disposed in an axial direction of the stator, and the fixed The electrical apparatus according to any one of claims 1 to 11, wherein a gap is provided between a child and the rotor.   12. A static induction electric machine including a winding core and a winding provided on a side surface of the winding core, wherein the winding core is magnetically connected to a yoke. An electrical device according to any one of the above.   Manufacture of electrical equipment comprising a wound magnetic core formed by winding a magnetic ribbon having a plurality of aperture groups each made of a soft magnetic material and having one or more apertures, and a winding provided on a side surface of the wound magnetic core A step of forming the opening; a step of winding the magnetic ribbon to form the wound core; a step of installing the winding on a side surface of the wound core; and the winding; And a step of incorporating a combination part with the wound core into another component.

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