Power generating element, power generating module, rotation speed detector and generator

Abstract

This power generation element (10) comprises a plurality of magnetic wires (11) that exhibit a large Barkhausen effect, a pickup coil (12) that is wound on the circumference of a bundle of the plurality of magnetic wires (11), and magnetic connection members (13) that magnetically connect respective end sections of the plurality of magnetic wires (11) to each other at both ends of the plurality of magnetic wires (11). When a magnetic field applied to the magnetic wires (11) reverses, the magnetic wires (11) cause the pickup coil (12) to generate a pulse voltage due to the large Barkhausen effect.

Description

[Technical Field]

[0001] The present disclosure relates to a power generating element having a magnetic wire with a large Barkhausen effect and a pickup coil, and a power generating module, a rotation speed detector, and a generator that include the power generating element. [Background technology]

[0002] Conventionally, power generating elements having a magnetic wire with a large Barkhausen effect and a pickup coil have been used to detect the rotation speed, which is the number of rotations per unit time of a motor, without the need for a battery through self-generated power, or to operate electronic devices using power generated from minute vibrations of structures such as bridges or machinery in factories.

[0003] A power generating element having a magnetic wire with the large Barkhausen effect and a pickup coil has a pickup coil wound around the magnetic wire. Hereinafter, a power generating element having a magnetic wire with the large Barkhausen effect and a pickup coil will be simply referred to as a power generating element. When the power generating element exceeds a certain trigger magnetic field strength, the magnetization direction of the magnetic wire suddenly reverses due to the influence of an external magnetic field, generating a voltage in the pickup coil.

[0004] The higher the voltage generated in the pickup coil of a power generating element, the higher the accuracy of detecting the rotation speed. Also, the higher the voltage generated in the pickup coil of a power generating element, the more powerful electronic devices can be operated. For this reason, there is a demand for increasing the voltage generated in the pickup coil of a power generating element.

[0005] Patent Document 1 discloses a power generating element in which a pickup coil is wound around at least two magnetic wires. Because the power generating element disclosed in Patent Document 1 has pickup coils wound around multiple magnetic wires, the voltage generated in the pickup coil when the trigger magnetic field strength is exceeded is higher than in a power generating element with a single magnetic wire. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Special Publication No. 2022-519668 Summary of the Invention [Problem to be solved by the invention]

[0007] However, the power generating element disclosed in Patent Document 1 suffers from a difference in the timing of power generation due to slight variations in the trigger magnetic field strength of each magnetic wire caused by manufacturing variations in the magnetic wires, or slight differences in the magnetic field applied from the magnet to each magnetic wire, so when the number of magnetic wires is N, the voltage generated in the pickup coil is lower than N times the voltage when there is only one magnetic wire. Therefore, there is a need for a power generating element that suppresses the reduction in voltage generated in the pickup coil caused by manufacturing variations in the magnetic wires.

[0008] The present disclosure has been made in view of the above, and aims to obtain a power generating element in which a decrease in voltage generated in a pickup coil due to manufacturing variations in magnetic wire is suppressed. [Means for solving the problem]

[0009] In order to solve the above-mentioned problems and achieve the object, a power generating element according to the present disclosure includes a plurality of magnetic wires having a large Barkhausen effect, a pickup coil wound around a bundle of the plurality of magnetic wires, and magnetic connecting members at both ends of the plurality of magnetic wires that magnetically connect the ends of the plurality of magnetic wires to each other. [Effects of the Invention]

[0010] According to the present disclosure, it is possible to obtain an electric power generating element in which a decrease in the voltage generated in the pickup coil due to manufacturing variations in the magnetic wire is suppressed. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a perspective view showing the configuration of a power generating element according to a first embodiment; [Figure 2] FIG. 1 is a schematic diagram illustrating the effect of magnetically connecting both ends of the magnetic wire of the power generating element according to the first embodiment. [Figure 3] FIG. 1 is a schematic diagram illustrating the effect of covering both ends of the magnetic wire of the power generating element with a cylindrical magnetic member according to the first embodiment. [Figure 4] FIG. 10 is a perspective view showing the configuration of a power generating element according to a second embodiment. [Figure 5] FIG. 10 is a perspective view showing the configuration of a power generation module according to a third embodiment. [Figure 6] FIG. 10 is a perspective view showing the configuration of a rotation speed detector according to a fourth embodiment. [Figure 7] FIG. 10 is a plan view showing a magnet and a power generating element included in a rotation speed detector according to a fourth embodiment. [Figure 8] FIG. 10 is a perspective view showing the configuration of a generator according to a fifth embodiment. [Figure 9] FIG. 13 is a perspective view showing the configuration of a power generating element provided in a stator of a generator according to a fifth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, a power generating element, a power generating module, a rotation speed detector, and a power generator according to embodiments will be described in detail with reference to the drawings.

[0013] Embodiment 1 1 is a perspective view showing the configuration of a power generating element according to embodiment 1. A power generating element 10 according to embodiment 1 includes a plurality of magnetic wires 11 having a large Barkhausen effect, a pickup coil 12 wound around a bundle of the magnetic wires 11, and magnetic connecting members 13 disposed on both ends of the magnetic wires 11. The magnetic connecting member 13 includes a cylindrical magnetic member 131 and a resin sealing material 132 filled inside the cylindrical magnetic member 131.

[0014] The magnetic wire 11 has a magnetostrictive effect, and expands and contracts due to magnetostriction in response to changes in the applied magnetic field.

[0015] The cylindrical magnetic member 131 is a cylindrical body made of a soft magnetic material such as iron. The magnetic permeability of the cylindrical magnetic member 131 may be higher than that of air, but is preferably higher than that of the magnetic wire 11. The soft magnetic material may be a steel material such as SS400 or S45C, a magnetic stainless steel material such as SUS430 or SUS440, or a high-permeability material such as permalloy or permendur. In the power generating element 10, the greater the spacing between the cylindrical magnetic members 131, the greater the magnetization reversal region of the magnetic wire 11, thereby increasing the amount of power generation. Therefore, it is desirable that one of the two cylindrical magnetic members 131 be positioned at one end of the magnetic wire 11 or as close to that end as possible, and the other of the two cylindrical magnetic members 131 be positioned at the other end of the magnetic wire 11 or as close to that end as possible.

[0016] The resin sealing material 132 has a hardness that does not prevent the magnetic wire 11 from expanding and contracting due to magnetostriction. The resin sealing material 132 fixes the magnetic wire 11 in a state where each end of the magnetic wire 11 is in contact with the cylindrical magnetic member 131. Therefore, the ends of the magnetic wire 11 are magnetically connected to each other.

[0017] FIG. 2 is a schematic diagram illustrating the effect of magnetically connecting the ends of the magnetic wires of the power generating element according to the first embodiment. FIG. 2 also shows the waveforms of voltages generated in the pickup coil 12 when the ends of the three magnetic wires 11 are connected and not connected magnetically. In FIG. 2, the vertical axis represents voltage, and the horizontal axis represents time elapsed from a reference time. In FIG. 2, the dashed, dashed, and double-dashed waveforms represent voltage waveforms when the ends of the three magnetic wires 11 are not magnetically connected, and the solid waveform represents voltage waveforms when the ends of the three magnetic wires 11 are magnetically connected. When the ends of the three magnetic wires 11 are not magnetically connected, slight variations in the trigger magnetic field strength of each magnetic wire 11 due to manufacturing errors in the magnetic wires 11 or slight differences in the magnetic fields applied to each magnetic wire from the magnet result in variations in the power generation timing of each magnetic wire 11. Here, if the characteristics of the three magnetic wires 11 are classified as A, B, and C, simply bundling three magnetic wires 11 together will typically result in each magnetic wire 11 generating a voltage in the pickup coil 12 at a different timing. In the example shown in Fig. 2, there is a 10 μs difference between the time when the voltage generated in the pickup coil 12 by the magnetic wire 11 with characteristic A reaches a maximum and the time when the voltage generated in the pickup coil 12 by the magnetic wire 11 with characteristic C reaches a maximum, and the resulting voltage obtained by superimposing the voltages generated in the pickup coil 12 by each of the three magnetic wires 11 is not three times the voltage generated in the pickup coil 12 by each of the three magnetic wires 11. On the other hand, when the magnetic wire 11 with characteristic A, the magnetic wire 11 with characteristic B, and the magnetic wire 11 with characteristic C are magnetically connected at both ends, the power generation timing of the magnetic wire 11 with characteristic A, the magnetic wire 11 with characteristic B, and the magnetic wire 11 with characteristic C is synchronized, as shown by the waveform shown by the solid line in Figure 2, and a higher voltage is generated in the pickup coil 12 than when the three magnetic wires 11 are not bundled together.

[0018] FIG. 3 is a schematic diagram illustrating the effect of covering both ends of the magnetic wire of the power generating element according to the first embodiment with a cylindrical magnetic member. FIG. 3 schematically illustrates waveforms of the measurement results of the voltage generated in the pickup coil 12 when both ends of the magnetic wire 11 are covered with the cylindrical magnetic member 131 and when they are not. In FIG. 3, the vertical axis represents voltage, and the horizontal axis represents the elapsed time from a reference time. In FIG. 3, the waveform indicated by the dashed dotted line represents the voltage waveform when both ends of the magnetic wire 11 are not covered with the cylindrical magnetic member 131, and the waveform indicated by the solid line represents the voltage waveform when both ends of the magnetic wire 11 are covered with the cylindrical magnetic member 131. As shown in FIG. 3, when both ends of the magnetic wire 11 are covered with the cylindrical magnetic member 131, the voltage generated in the pickup coil 12 is higher than when both ends of the magnetic wire 11 are not covered with the cylindrical magnetic member 131. The reason why the voltage generated in the pickup coil 12 can be increased by covering both ends of the magnetic wire 11 with the cylindrical magnetic member 131 is presumably because the magnitude of the demagnetizing field is reduced when all of the multiple magnetic wires 11 come into contact with the cylindrical magnetic member 131.

[0019] It was also confirmed that the voltage generated in the pickup coil 12 decreases when both ends of the magnetic wire 11 are firmly fixed. This is because the magnetic wire 11 has a magnetostrictive effect, and the magnetic wire 11 expands and contracts due to magnetostriction in response to changes in the applied magnetic field. However, it is believed that firmly fixing both ends of the magnetic wire 11 prevents the expansion and contraction of the magnetic wire 11, inhibiting magnetic changes and making it difficult for magnetization reversal to occur, resulting in a decrease in the generated voltage. In the power generating element 10 according to the first embodiment, the interior of the cylindrical magnetic member 131 is filled with a resin sealing material 132, and the resin sealing material 132 is present between the magnetic wire 11 and the cylindrical magnetic member 131. As described above, the resin sealing material 132 is hard enough not to interfere with the expansion and contraction of the magnetic wire 11 due to magnetostriction. Therefore, the expansion and contraction of the magnetic wire 11 due to magnetostriction is not obstructed by the resin sealing material 132, and a decrease in the voltage generated in the pickup coil 12 can be suppressed.

[0020] In the power generating element 10 according to embodiment 1, the ends of the magnetic wire 11 are magnetically connected by a magnetic connecting member 13 having a cylindrical magnetic member 131 and a resin sealing material 132, and therefore, it is possible to prevent the voltage generated in the pickup coil 12 from decreasing due to manufacturing variations in the magnetic wire 11.

[0021] Embodiment 2 FIG. 4 is a perspective view showing the configuration of a power generating element according to embodiment 2. Similar to the power generating element 10 according to embodiment 1, the power generating element 10 according to embodiment 2 includes a plurality of magnetic wires 11, a pickup coil 12 wound around a bundle of the magnetic wires 11, and magnetic connecting members 13 disposed at both ends of the magnetic wires 11. However, the magnetic connecting member 13 includes cylindrical members 133 that cover both ends of the magnetic wires 11, and a magnetic resin sealing material 134 filled inside the cylindrical members 133. Note that the cylindrical members 133 may be non-magnetic. Furthermore, in the power generating element 10 according to embodiment 2, the plurality of magnetic wires 11 are disposed with gaps between them.

[0022] The magnetic resin sealing material 134 is a composite resin material in which magnetic powder, which is a dispersoid, is dispersed in resin, which is a dispersion medium. The magnetic resin sealing material 134 has a hardness that does not hinder the expansion and contraction of the magnetic wire 11 due to magnetostriction. The magnetic resin sealing material 134 is present between the magnetic wire 11 and the tubular member 133, and between the magnetic wires 11 themselves. Therefore, the ends of the magnetic wires 11 are magnetically connected to each other by the magnetic resin sealing material 134. The magnetic wires 11 are arranged with a gap between them, so only the ends are magnetically connected to each other, and the parts other than the ends are not in contact with each other.

[0023] In the power generating element 10 according to the second embodiment, the ends of the magnetic wire 11 are magnetically connected by the magnetic connecting member 13 having the tubular member 133 and the magnetic resin sealing material 134, and therefore, the voltage generated in the pickup coil 12 can be prevented from decreasing due to manufacturing variations in the magnetic wire 11.

[0024] Furthermore, since the magnetic wires 11 are not in contact with each other and only both ends of the magnetic wires 11 are magnetically connected, the aspect ratio of each magnetic wire 11 is the same as when there is a single magnetic wire 11. Therefore, the power generating element 10 according to the second embodiment can obtain a power generating effect due to magnetization reversal by the multiple magnetic wires 11 while reducing the magnitude of the demagnetizing field.

[0025] Although the configuration in which the ends of the magnetic wires 11 are magnetically connected to each other by the magnetic resin sealing material 134 has been described here, the ends of the magnetic wires 11 may also be magnetically connected to each other by bundling the ends of the magnetic wires 11 with magnetic metal tape. Also, the magnetic connecting member 13 according to the second embodiment may have a cylindrical magnetic member 131 and a resin sealing material 132 as in the first embodiment, and the magnetic wires 11 may be configured so that there is a gap between them and each of them contacts the cylindrical magnetic member 131.

[0026] Embodiment 3 FIG. 5 is a perspective view showing the configuration of a power generation module according to a third embodiment. The power generation module 20 according to the third embodiment includes a power generation element 10, a magnet unit 30, and a housing unit 40. The power generation element 10 includes a plurality of magnetic wires 11, a pickup coil 12 wound around the magnetic wires 11, and magnetic connection members 13 disposed at both ends of the magnetic wires 11. The magnetic connection member 13 includes a cylindrical member 133 and a magnetic metal tape 135 wound around the end of the magnetic wire 11. An example of a magnetic metal material for the magnetic metal tape 135 is permalloy, but the magnetic metal tape 135 may be made of a magnetic metal other than permalloy. The end of the magnetic wire 11 around which the magnetic metal tape 135 is wound is inserted into the cylindrical member 133. The plurality of magnetic wires 11 are arranged side by side in the X direction, which is perpendicular to the Y direction, which is the longitudinal direction. The direction perpendicular to both the X direction and the Y direction is defined as the Z direction. Here, the Y direction is the first direction and the X direction is the second direction.

[0027] The magnet section 30 has a first magnet 31 and a second magnet 32 ​​arranged side by side in the X direction. The first magnet 31 and the second magnet 32 ​​are made of permanent magnets. A spacer 33 made of a non-magnetic material is arranged between the first magnet 31 and the second magnet 32. The non-magnetic material is a substance with a relative magnetic permeability of 1 or less.

[0028] The first magnet 31, the second magnet 32, and the spacer 33 are fixed together to form the magnet unit 30. Methods for fixing the first magnet 31, the second magnet 32, and the spacer 33 include, but are not limited to, adhesion, integral molding, screw fastening, and fastening with a fastening band.

[0029] In the magnet unit 30, the first magnet 31 and the second magnet 32 ​​can be displaced together in the X direction while maintaining a constant gap between them. Note that, as long as the first magnet 31 and the second magnet 32 ​​can be displaced together in the X direction while maintaining a constant gap between them, the spacer 33 may be air.

[0030] The housing 40 is made of a non-magnetic material, more specifically, a resin molded body. The housing 40 has a bottom plate 43 parallel to the XY plane, a pair of frame portions 41 located at both ends of the bottom plate 43 in the Y direction, and a pair of frame portions 42 located at both ends of the bottom plate 43 in the X direction. The magnet portion 30 is held in a recess 44 surrounded by the frame portions 41, 42 and the bottom plate 43.

[0031] The width of the recess 44 in the X direction, i.e., the spacing between the frame portions 42 in the X direction, is wider than the width of the magnet portion 30 in the X direction. Therefore, the magnet portion 30 is displaceable in the recess 44 in the X direction.

[0032] The displacement of magnet part 30 is at least twice the distance between first magnet 31 and second magnet 32. Furthermore, movement of magnet part 30 in the +Z direction is restricted by a guide part (not shown) that protrudes from frame parts 41 and 42 into recess 44 like an eave.

[0033] The power generating element 10 is disposed in the +Z direction with respect to the displacement range of the magnet section 30. FIG. 5 shows a state in which the first magnet 31 faces the power generating element 10. When the magnet section 30 is displaced in the +X direction, the second magnet 32 ​​faces the power generating element 10. That is, when the magnet section 30 moves linearly, the magnetic pole applied to the power generating element 10 is switched. When the state changes from one in which the first magnet 31 faces the power generating element 10 to one in which the second magnet 32 ​​faces the power generating element 10, the magnetic field applied to the magnetic wire 11 is reversed, and a voltage is generated in the pickup coil 12. Similarly, when the state changes from one in which the second magnet 32 ​​faces the power generating element 10 to one in which the first magnet 31 faces the power generating element 10, the magnetic field applied to the magnetic wire 11 is reversed, and a voltage is generated in the pickup coil 12.

[0034] In the power generation module 20 according to the third embodiment, the magnetic wires 11 are arranged side by side in the X direction, and therefore the distance in the Z direction between each magnetic wire 11 and the magnet section 30 is the same. This makes it difficult for the power generation timing of each magnetic wire 11 to vary, and the voltage generated in the pickup coil 12 is unlikely to decrease. The power generation module 20 may be configured using the power generation elements 10 according to the first or second embodiment.

[0035] The power generation module 20 of embodiment 3 can prevent the voltage generated in the pickup coil 12 from decreasing due to manufacturing variations in the magnetic wire 11, and therefore can increase the voltage generated in the pickup coil 12 when the magnet section 30 is displaced in the X direction due to vibration or the like.

[0036] Although the magnetic connecting member 13 according to the third embodiment is shown as having a tubular member 133 and a magnetic metal tape 135, it may alternatively be configured as having a tubular magnetic member 131 and a resin sealing material 132 as in the first embodiment, or as having a tubular member 133 and a magnetic resin sealing material 134 as in the second embodiment.

[0037] Embodiment 4 FIG. 6 is a perspective view showing the configuration of a rotation speed detector according to a fourth embodiment. The rotation speed detector 50 according to the fourth embodiment is a magnetic rotation speed detector that detects the rotation speed of a rotating body based on an induced voltage generated in response to a change in a magnetic field. The rotation speed detector 50 detects the number of rotations of the rotating body per unit time. The rotation speed detector 50 includes a power generation module 20 and a processing unit 60. The power generation module 20 includes a power generation element 10 according to the first or second embodiment and a magnet unit formed by a magnet 70 arranged opposite the power generation element 10. The magnet 70 is attached to a shaft 21 and rotates together with the shaft 21. The rotational movement of the magnet unit formed by the magnet 70 switches the magnetic pole applied to the power generation element 10. The power generation element 10 generates an induced voltage in a pickup coil 12 in response to a change in the magnetic field caused by the rotation of the magnet 70. A signal corresponding to the voltage generated in the pickup coil 12 is input to the processing unit 60.

[0038] The processing unit 60 counts the number of pulses generated by power generation based on the signal from the power generation element 10. By counting the number of pulses, the processing unit 60 detects the number of rotations of the shaft 21. The processing unit 60 can operate using an induced voltage, and therefore can detect the number of rotations of the shaft 21 without a power source.

[0039] The power generating element 10 is disposed facing the magnet 70 in a direction parallel to the rotation axis 22 of the shaft 21. The power generating element 10 faces the surface of the magnet 70 opposite to the surface fixed to the shaft 21. The power generating element 10 may also be disposed facing the surface of the magnet 70 fixed to the shaft 21.

[0040] FIG. 7 is a plan view showing the magnet and power generating element of a rotation speed detector according to the fourth embodiment. FIG. 7 shows the rotation speed detector 50, with the magnet 70 and power generating element 10 viewed in a direction parallel to the rotation axis 22 and from the opposite side of the shaft 21. Note that the processing unit 60 is not shown in FIG. 7. The power generating element 10 is disposed facing the magnet 70 at a position away from the center 71 of the magnet 70, which is the circular shape of the magnet 70 in plan view. Note that the rotation speed detector 50 is generally used in conjunction with an angle detector that detects the rotation angle of a rotating body. The angle detector includes a disk for optical detection with an optical slit formed therein, a light-emitting unit that generates light, and a light-receiving unit that detects the light emitted from the light-emitting unit and transmitted through the optical slit. For example, the disk is fixed to the rotating body on the upper surface side of the magnet 70. The light-emitting unit and the light-receiving unit are provided at positions facing the optical slit. Note that the angle detector is not shown in FIG. 7.

[0041] The rotation speed detector 50 of embodiment 4 can suppress a decrease in the voltage generated in the pickup coil 12 due to manufacturing variations in the magnetic wire 11, and can therefore increase the voltage generated in the pickup coil 12 due to the rotation of the shaft 21.

[0042] Embodiment 5. FIG. 8 is a perspective view showing the configuration of a generator according to the fifth embodiment. A generator 100 according to the fifth embodiment has a rotor 80 and a stator 90. The rotor 80 has a cylindrical base 81 and a plurality of magnets 82 arranged on the outer circumferential surface of the base 81. The plurality of magnets 82 are arranged alternately in the circumferential direction of the base 81, with the north poles facing outward and the south poles facing outward. The stator 90 has a plurality of power generating elements 10 arranged on the same arc having a center on the central rotation axis 83 of the rotor 80. The plurality of power generating elements 10 are installed at equal angular intervals. In the fifth embodiment, twelve power generating elements 10 are arranged at 30-degree intervals.

[0043] FIG. 9 is a perspective view showing the configuration of a power generating element included in a stator of a generator according to the fifth embodiment. The power generating element 10 includes a plurality of magnetic wires 11, pickup coils 12 wound around the plurality of magnetic wires 11, and magnetic connection members 13 disposed at both ends of the magnetic wires 11. The magnetic connection member 13 includes a cylindrical member 133 and a magnetic resin sealing material 134 filled inside the cylindrical member 133. The power generating element 10 included in the stator 90 of the generator 100 according to the fifth embodiment has the same configuration as the power generating element 10 according to the second embodiment, but the number of magnetic wires 11 is greater than that of the power generating element 10 according to the second embodiment, typically in the double to triple digits. However, the number of magnetic wires 11 may be in the single digits or four digits or more and is not limited to a specific number. As with the power generating element 10 according to the second embodiment, a magnetic resin sealing material 134 is present between the ends of the magnetic wires 11, and the ends of the magnetic wires 11 are magnetically connected to each other.

[0044] The magnet 82 of the rotor 80 is magnetized so as to generate magnetic lines of force that penetrate the pickup coil 12. When the rotor 80 rotates, the power generating element 10 alternates between facing the north pole and facing the south pole, generating an AC voltage in the pickup coil 12.

[0045] In a typical generator, an iron core, which is a magnetic material with high magnetic permeability, is often placed inside the winding to efficiently generate electricity in response to the rotation of the magnet. The generator 100 according to the fifth embodiment uses a bundle of magnetic wires 11 instead of an iron core, and can obtain a higher voltage than a typical generator by using a bundle of magnetic wires 11 instead of an iron core, which allows the magnetic wires 11 to reverse their magnetization and generate electricity themselves.

[0046] Here, an example is given in which the stator 90 includes a power generating element 10 having a structure similar to that of the power generating element 10 according to embodiment 2, but the power generating element 10 included in the stator 90 may also have a structure similar to that of the power generating element 10 according to embodiment 1.

[0047] The configurations shown in the above embodiments are merely examples of the content, and may be combined with other known technologies, or parts of the configurations may be omitted or modified without departing from the spirit of the invention. [Explanation of symbols]

[0048] 10 power generating element, 11 magnetic wire, 12 pickup coil, 13 magnetic connecting member, 20 power generating module, 21 shaft, 22 rotating shaft, 30 magnet portion, 31 first magnet, 32 second magnet, 33 spacer, 40 housing portion, 41, 42 frame portion, 43 bottom plate, 44 recess, 50 rotation speed detector, 60 processing portion, 70, 82 magnet, 71 center, 80 rotor, 81 base portion, 83 rotating center shaft, 90 stator, 100 generator, 131 cylindrical magnetic member, 132 resin sealing material, 133 cylindrical member, 134 magnetic resin sealing material, 135 magnetic metal tape.

Claims

1. a plurality of magnetic wires having a large Barkhausen effect; and a pickup coil wound around the bundle of the plurality of magnetic wires; A power generating element comprising: magnetic connecting members at both ends of the plurality of magnetic wires, the magnetic connecting members magnetically connecting the ends of the plurality of magnetic wires to each other.

2. 2. The power generating element according to claim 1, wherein the plurality of magnetic wires are magnetically connected to each other only at their opposite ends, and the portions other than the opposite ends are not in contact with each other.

3. the magnetic connection member includes a cylindrical magnetic member and a resin sealing material filled inside the cylindrical magnetic member, The power generating element according to claim 1 , wherein each of the plurality of magnetic wires is in contact with the cylindrical magnetic member.

4. The power generating element according to claim 3 , wherein the resin sealing material fixes the ends of the magnetic wires so that the magnetic wires expand and contract due to magnetostriction in response to changes in an applied magnetic field.

5. the magnetic connection member includes a cylindrical member and a magnetic resin sealing material filled in the cylindrical member, 2. The power generating element according to claim 1, wherein the magnetic resin sealing material is present between the ends of each of the plurality of magnetic wires.

6. The power generating element according to claim 5, characterized in that the magnetic resin sealing material fixes the ends of each of the plurality of magnetic wires so that the magnetic wires expand and contract due to magnetostriction in response to changes in an applied magnetic field.

7. 2. The power generating element according to claim 1, wherein the magnetic connecting member is a magnetic metal tape wound around the ends of the plurality of magnetic wires.

8. The power generating element according to any one of claims 1 to 7, a magnet section that changes the magnetic pole applied to the power generating element by rotating or linearly moving the magnet section, and the power generating element generates electricity by the rotational movement or linear movement of the magnet section.

9. The plurality of magnetic wires are arranged side by side in a second direction perpendicular to a first direction, which is the longitudinal direction, The power generating module according to claim 8 , wherein the magnet portion includes a plurality of magnets arranged in the second direction at intervals.

10. The power generating element according to any one of claims 1 to 7, a magnet section that rotates to switch the magnetic poles applied to the power generating element; a processing unit that counts pulses due to a voltage generated in the pickup coil by rotational movement of the magnet unit.

11. a rotor having a cylindrical base and a plurality of magnets arranged on an outer circumferential surface of the base; The power generating element according to any one of claims 1 to 7, further comprising: stators arranged at equal angular intervals on the same arc having a center on the central axis of rotation of the rotor; The generator is characterized in that the plurality of magnets are arranged alternately in the circumferential direction of the base with the north poles facing outward and the south poles facing outward.

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