POWER GENERATING ELEMENT, POWER GENERATING MODULE, TACHOMETER AND POWER GENERATOR

Abstract

A power generating element (10) comprises: a plurality of magnetic wires (11) having a large Barkhausen effect; a take-up coil (12) wound around a bundle of the plurality of magnetic wires (11); and magnetic connectors (13) magnetically connecting ends of the plurality of magnetic wires (11) at both ends of the plurality of magnetic wires (11), wherein the magnetic wires (11) generate a pulse voltage in the take-up coil (12) upon reversal of a magnetic field applied to the magnetic wires (11) by the large Barkhausen effect.

Description

Area

[0001] The present invention relates to: a power generation element comprising magnet wires with a large Barkhausen effect and a pickup coil; and a power generation module, a tachometer, and a power generator comprising the power generation element. background

[0002] Conventionally, a power generating element comprising magnetic wires with a large Barkhausen effect and a pickup coil has been used to detect a rotational speed, that is, the number of revolutions of a motor per unit time, by self-generation without a battery, or to operate an electronic device with electric current generated by micro-vibration of a structure, such as a bridge or a machine in a factory.

[0003] In the power generation element, which includes the magnet wires with the large Barkhausen effect and the pickup coil, the pickup coil is wound around the magnet wires. Hereinafter, the power generation element, which includes the magnet wires with the large Barkhausen effect and the pickup coil, is simply referred to as the power generation element. When a certain trigger magnetic field strength is exceeded in the power generation element, the magnetization direction of the magnet wires is rapidly reversed due to the influence of an external magnetic field, and a voltage is generated in the pickup coil.

[0004] As the voltage generated in the pickup coil increases, the power generation element detects the rotational speed with greater accuracy. Furthermore, as the voltage in the pickup coil increases, the power generation element can drive the electronic device at higher power. Therefore, it is necessary for the power generation element to increase the voltage generated in the pickup coil.

[0005] Patent Literature 1 discloses a power generation element in which a pickup coil is wound around at least two magnet wires. In the power generation element disclosed in Patent Literature 1, the pickup coil is wound around a plurality of magnet wires, so that the voltage generated in the pickup coil when the trigger magnetic field strength is exceeded is higher than that in a power generation element comprising a single magnet wire. Citation listPatent literature

[0006] Patent Literature 1: Japanese translation of the PCT international application, laid open under No. 2022-519668 Summary of the inventionTask of the invention

[0007] However, in the power generation element disclosed in Patent Literature 1, manufacturing variations of the magnet wires result in slight variations in the magnetic trigger field strength of the magnet wires or slight differences in the magnetic field exerted by a magnet on the magnet wires, resulting in mismatched power generation timings. Therefore, when the number of magnet wires is N, the voltage generated in the take-up coil is lower than N times the voltage generated when one magnet wire is used. Therefore, it is necessary to implement a power generation element that prevents the voltage generated in the take-up coil from being reduced due to manufacturing variations of the magnet wires.

[0008] The present invention has been made in view of the foregoing, and an object of the present invention is to provide a power generating element that prevents a voltage generated in a take-up coil from being reduced due to manufacturing variations of the magnet wires. Means of solving the problem

[0009] To solve the above problem and achieve the objective, a power generation element according to the present invention comprises a plurality of magnet wires with a large Barkhausen effect; and a take-up coil wound around a bundle of the plurality of magnet wires. The power generation element includes magnetic connectors that magnetically connect ends of the plurality of magnet wires at both ends of the plurality of magnet wires. Effects of the invention

[0010] The present invention can provide the power generating element that prevents the voltage generated in the take-up coil from being reduced due to manufacturing variations of the magnet wires. Short description of the drawings Fig. 1 is a perspective view illustrating a configuration of a power generation element according to a first embodiment. Fig. 2 is a schematic diagram illustrating an effect achieved by magnetically connecting the ends of magnet wires at both ends thereof in the power generating element according to the first embodiment. Fig. 3 is a schematic diagram illustrating an effect achieved by covering both ends of the magnet wires with magnet tubes in the power generating element according to the first embodiment. Fig. 4 is a perspective view illustrating a configuration of a power generation element according to a second embodiment. Fig. 5 is a perspective view illustrating a configuration of a power generation module according to a third embodiment. Fig. 6 is a perspective view illustrating a configuration of a speed sensor according to a fourth embodiment. Fig. 7 is a plan view illustrating a magnet and a power generating element included in the speed sensor according to the fourth embodiment. Fig. 8 is a perspective view illustrating a configuration of a power generator according to a fifth embodiment. Fig. 9 is a perspective view illustrating a configuration of a power generation element included in a stator of the power generator according to the fifth embodiment. Description of the embodiments

[0011] Hereinafter, a power generation element, a power generation module, a speed detector, and a power generator according to the embodiments will be described in detail with reference to the drawings. First embodiment.

[0012] Fig. Figure 1 is a perspective view illustrating a configuration of a power generation element according to a first embodiment. A power generation element 10 according to the first embodiment includes a plurality of magnet wires 11 with a large Barkhausen effect, a take-up coil 12 wound around a bundle of the magnet wires 11, and magnetic connectors 13 arranged at both ends of the magnet wires 11. The magnetic connector 13 includes a magnetic tube 131 and a resin sealant 132 with which the interior of the magnetic tube 131 is filled.

[0013] The magnetic wire 11 has a magnetostrictive effect and expands and contracts by magnetostriction in response to a change in an applied magnetic field.

[0014] The magnet tube 131 is a tubular body made of a soft magnetic material, such as iron. The permeability of the magnet tube 131 only needs to be higher than that of air, but is preferably higher than that of the magnet wire 11. The soft magnetic material can be a steel material such as SS400 or S45C, a magnetic stainless steel material such as SUS430 or SUS440, a high-permeability material such as Permalloy or Permendur, or the like. The larger the distance between the magnet tubes 131 in the power generation element 10, the larger the magnetization reversal range of the magnet wires 11, resulting in an increase in the generated power.Therefore, it is desirable that one of two of the magnet tubes 131 be arranged at one end of the magnet wires 11 or at a position as close as possible to the one end, and the other of the two magnet tubes 131 be arranged at the other end of the magnet wires 11 or at a position as close as possible to the other end.

[0015] The resin mixture 132 has a hardness that does not hinder the expansion and contraction of the magnet wires 11 due to magnetostriction. The resin mixture 132 fixes the magnet wires 11 in a state where the ends of the magnet wires 11 are in contact with the magnet tube 131. Therefore, the ends of the magnet wires 11 are magnetically connected to each other.

[0016] Fig. 2 is a schematic diagram illustrating an effect achieved by magnetically connecting the ends of the magnet wires at their both ends in the power generating element according to the first embodiment. Fig. Figure 2 schematically shows the waveforms of the voltages generated in the pickup coil 12 in a case where the ends of three of the magnet wires 11 are not magnetically connected at both ends, and in a case where the ends are magnetically connected. Fig. 2, the vertical axis represents the voltage and the horizontal axis represents the elapsed time from a certain reference time. In addition, Fig. 2, a dashed line, a dash-dotted line, and a dash-dotted-dash-dotted line represent the voltage waveforms in the case where the ends of the three magnet wires 11 are not magnetically connected at both ends, and a solid line represents the voltage waveform in the case where the ends of the three magnet wires 11 are magnetically connected at both ends. When the ends of the three magnet wires 11 are not magnetically connected at both ends, manufacturing defects of the magnet wires 11 will cause small fluctuations in the magnetic trigger field strength of the magnet wires or small differences in the magnetic field exerted by a magnet on the magnet wires, resulting in fluctuations in the power generation timing of the magnet wires 11.Here, if the characteristics of the three magnet wires 11 are distinguished as A, B, and C, the three magnet wires 11 being bundled together normally generate voltages in the pickup coil 12 at different times. In a [context unclear], [context unclear] Fig. 2, the times at which the voltage generated in the pickup coil 12 by the magnet wire 11 with property A is maximum and the times at which the voltage generated in the pickup coil 12 by the magnet wire 11 with property C is maximum are offset by 10 [µs], and the voltage generated by superimposing the voltages generated in the pickup coil 12 by the three magnet wires 11 is not three times the voltage generated in the pickup coil 12 by each of the three magnet wires 11. On the other hand, in the case where the ends of the magnet wire 11 with property A, the magnet wire 11 with property B, and the magnet wire 11 with property C are magnetically connected to each other at both ends, as indicated by the waveform indicated by the solid line in Fig. 2, the timing of power generation of the magnet wire 11 having the property A, the magnet wire 11 having the property B and the magnet wire 11 having the property C are coordinated so that a high voltage is generated in the take-up coil 12, compared with the case where the three magnet wires 11 are not bundled.

[0017] Fig. 3 is a schematic diagram illustrating an effect achieved by covering both ends of the magnet wires with the magnet tubes in the power generating element according to the first embodiment. Fig. Figure 3 schematically shows the waveforms of the measurement results of the voltages generated in the pickup coil 12 in a case where the two ends of the magnet wires 11 are covered with the magnet tubes 131 and in a case where the two ends are not covered with the magnet tubes 131. In Fig. 3, the vertical axis represents the voltage and the horizontal axis represents the elapsed time from a certain reference time. In addition, Fig. 3, a dot-dash line represents the voltage waveform in the case where the two ends of the magnet wires 11 are not covered with the magnet tubes 131, and a solid line represents the voltage waveform in the case where the two ends of the magnet wires 11 are covered with the magnet tubes 131. As in Fig. 3, the voltage generated in the pickup coil 12 is higher when both ends of the magnet wires 11 are covered with the magnet tubes 131 than when both ends of the magnet wires 11 are not covered with the magnet tubes 131. The reason why the voltage generated in the pickup coil 12 can be increased by covering both ends of the magnet wires 11 with the magnet tubes 131 is presumed to be that the magnitude of the diamagnetic field is reduced by the contact of all of the plurality of magnet wires 11 with the magnet tubes 131.

[0018] Furthermore, it was confirmed that the voltage generated in the pickup coil 12 is reduced when the two ends of the magnet wires 11 are firmly fixed. This is presumably because when the two ends of the magnet wires 11, which exhibit the magnetostrictive effect and expand and contract due to magnetostriction in response to a change in the applied magnetic field, are firmly fixed, the expansion and contraction of the magnet wires 11 is hindered, thus preventing magnetic change, preventing magnetization reversal from easily occurring, and reducing the generated voltage. In the power generating element 10 according to the first embodiment, the interior of the magnet tube 131 is filled with the resin sealant 132, and the resin sealant 132 is interposed between the magnet wires 11 and the magnet tube 131.As described above, since the resin seal 132 has a hardness that does not hinder the expansion and contraction of the magnet wires 11 due to magnetostriction, the expansion and contraction of the magnet wires 11 due to magnetostriction is not hindered by the resin seal 132, so that a reduction in the voltage generated in the take-up coil 12 can be suppressed.

[0019] In the power generating element 10 according to the first embodiment, the ends of the magnet wires 11 are magnetically connected to each other by the magnetic connector 13 including the magnet tube 131 and the resin seal 132, whereby it is possible to suppress the voltage generated in the take-up coil 12 from being reduced due to manufacturing variations of the magnet wires 11. Second embodiment.

[0020] Fig. 4 is a perspective view illustrating a configuration of a power generation element according to a second embodiment. Like the power generation element 10 according to the first embodiment, the power generation element 10 according to the second embodiment includes a plurality of magnet wires 11, the take-up coil 12 wound around the bundle of the magnet wires 11, and the magnetic connectors 13 arranged at both ends of the magnet wires 11. However, it should be noted that the magnetic connectors 13 include tubes 133 covering the corresponding ends of the magnet wires 11 and magnetic resin packings 134 filling the insides of the tubes 133. It should be noted that the tube 133 may be made of a non-magnetic material. Furthermore, in the power generation element 10 according to the second embodiment, the plurality of magnet wires 11 are arranged with a space between them.

[0021] The magnetic resin seal 134 is a composite resin material in which magnetic powder is dispersed as a dispersoid in a resin as a dispersion medium. The magnetic resin seal 134 has a hardness that does not hinder the expansion and contraction of the magnetic wires 11 due to magnetostriction. The magnetic resin seal 134 is located between the magnetic wires 11 and the tube 133, as well as between the magnetic wires 11. Therefore, the ends of the magnetic wires 11 are magnetically connected to each other by the magnetic resin seal 134. Since the magnetic wires 11 are spaced apart, only their two ends are magnetically connected to each other, and portions other than the two ends are not in contact with each other.

[0022] In the power generating element 10 according to the second embodiment, the ends of the magnet wires 11 are magnetically connected to each other by the magnetic connector 13 including the tube 133 and the magnetic resin sealer 134, whereby it is possible to suppress the voltage generated in the take-up coil 12 from being reduced due to manufacturing variations of the magnet wires 11.

[0023] In addition, since the magnet wires 11 are not in contact with each other and only the two ends of the magnet wires 11 are magnetically connected, the aspect ratio of each of the magnet wires 11 is similar to that in the case of one magnet wire 11. Therefore, the power generation element 10 according to the second embodiment can achieve a power generation effect by magnetization reversal using the plurality of magnet wires 11 while reducing the magnitude of the diamagnetic field.

[0024] Note that although the configuration in which the ends of the magnet wires 11 are magnetically connected to each other by the magnetic resin seal 134 has been described, the ends of the magnet wires 11 may be magnetically connected to each other by a magnetic metal tape that joins the ends of the magnet wires 11 together. In addition, the magnetic connector 13 according to the second embodiment may be configured such that the magnet tube 131 and the resin seal 132 are included as in the first embodiment, and the magnet wires 11 are spaced apart from each other and each contact the magnet tube 131. Third embodiment.

[0025] Fig. 5 is a perspective view illustrating a configuration of a power generation module according to a third embodiment. A power generation module 20 according to the third embodiment includes the power generation element 10, a magnetizer 30, and a casing 40. The power generation element 10 includes a plurality of magnet wires 11, the take-up coil 12 wound around the magnet wires 11, and the magnetic connectors 13 arranged at both ends of the magnet wires 11. The magnetic connector 13 includes the tube 133 and a magnetic metal tape 135 wound around the ends of the magnet wires 11. An example of the magnetic metal used as the material for the magnetic metal tape 135 includes permalloy, but the material of the magnetic metal tape 135 may be a magnetic metal other than permalloy. The ends of the magnetic wires 11, around which the magnetic metal strip 135 is wound, are inserted into the tube 133.The plurality of magnet wires 11 are arranged side by side in an X direction, which is a direction perpendicular to a Y direction as the longitudinal direction. Note that a direction orthogonal to both the X direction and the Y direction is defined as the Z direction. Here, the Y direction is a first direction, and the X direction is a second direction.

[0026] The magnetizer 30 comprises 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 formed from 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 permeability of one or less.

[0027] The first magnet 31, the second magnet 32, and the spacer 33 are integrally fixed to form the magnetizer 30. A method for fixing the first magnet 31, the second magnet 32, and the spacer 33 includes, for example, but is not limited to, bonding, integral molding, screwing, fixing with a fixing tape, and the like.

[0028] In the magnetization device 30, the first magnet 31 and the second magnet 32 ​​can be integrally displaced in the X direction while maintaining a certain distance therebetween in the X direction. Note that if the first magnet 31 and the second magnet 32 ​​can be integrally displaced in the X direction while maintaining a certain distance therebetween in the X direction, the spacer 33 can be made of air.

[0029] The housing 40 is made of a non-magnetic material, specifically a resin molded body. The housing 40 includes a bottom plate 43 parallel to an XY plane, a pair of frame portions 41 located at both ends in the Y direction of the bottom plate 43, and a pair of frame portions 42 located at both ends in the X direction of the bottom plate 43. The magnetizer 30 is held in a recess 44 surrounded by the frame portions 41 and 42 and the bottom plate 43.

[0030] A width of the recess 44 in the X direction, i.e., a distance between the frame parts 42 in the X direction, is greater than a width of the magnetizer 30 in the X direction. Therefore, the magnetizer 30 can be displaced in the recess 44 in the X direction.

[0031] The displacement amount of the magnetizer 30 is twice or greater than the distance between the first magnet 31 and the second magnet 32. In addition, a movement of the magnetizer 30 in the +Z direction is restricted by a guide portion (not shown) projecting in the form of projections from the frame parts 41 and 42 to the recess 44.

[0032] The power generating element 10 is arranged in the +Z direction with respect to the range in which the magnetizer 30 can be moved. Fig. 5 shows a state in which the first magnet 31 faces the power generation element 10. When the magnetizer 30 is displaced in a +X direction, the second magnet 32 ​​faces the power generation element 10. That is, by a linear movement of the magnetizer 30, the magnetic pole applied to the power generation element 10 is switched. At the time of switching from the state in which the first magnet 31 faces the power generation element 10 to the state in which the second magnet 32 ​​faces the power generation element 10, the magnetic field applied to the magnet wires 11 is reversed, and a voltage is generated in the pickup coil 12.Similarly, when changing from the state in which the second magnet 32 ​​faces the power generating element 10 to the state in which the first magnet 31 faces the power generating element 10, the magnetic field applied to the magnet wires 11 is reversed and a voltage is generated in the pickup coil 12.

[0033] In the power generation module 20 according to the third embodiment, the magnet wires 11 are arranged side by side in the X direction, so that the distance between each of the magnet wires 11 and the magnetizer 30 is equal in the Z direction. Therefore, the power generation timing of the magnet wires 11 is less likely to vary, and the voltage generated in the pickup coil 12 is reduced. Note that the power generation module 20 can be configured using the power generation element 10 according to the first or second embodiment.

[0034] The power generation module 20 according to the third embodiment can prevent the voltage generated in the take-up coil 12 from being reduced due to the manufacturing variations of the magnet wires 11, and thus can increase the voltage generated in the take-up coil 12 when the magnetizer 30 is displaced in the X direction due to vibration or the like.

[0035] Note that the magnetic connector 13 according to the third embodiment has the configuration including the tube 133 and the magnetic metal band 135, but may have a configuration including the magnetic tube 131 and the resin seal 132 as in the first embodiment, or may have a configuration including the tube 133 and the magnetic resin seal 134 as in the second embodiment. Fourth embodiment.

[0036] Fig. 6 is a perspective view illustrating a configuration of a rotation speed detector according to a fourth embodiment. A rotation speed detector 50 according to the fourth embodiment is a magnetic rotation speed detector that detects a rotation speed of a rotating body based on an induced voltage generated according to a change in a magnetic field. The rotation speed detector 50 detects the number of times the rotating body rotates per unit time. The rotation speed detector 50 includes the power generation module 20 and a processor 60. The power generation module 20 includes the power generation element 10 according to the first or second embodiment and a magnetizer having a magnet 70 arranged to face the power generation element 10. The magnet 70 is attached to a shaft 21 and rotates with the shaft 21.By rotating the magnetizer, which includes the magnet 70, the magnetic pole applied to the power generating element 10 is switched. The power generating element 10 generates the induced voltage in the pickup coil 12 according to the change in the magnetic field due to the rotation of the magnet 70. A signal of the voltage generated in the pickup coil 12 is input to the processor 60.

[0037] The processor 60 counts the number of power generation pulses based on the signal input from the power generation element 10. The processor 60 detects the rotational speed of the shaft 21 by counting the number of pulses. The processor 60 can be operated using the induced voltage and can thus detect the rotational speed of the shaft 21 without a power supply.

[0038] The power generating element 10 is arranged to face the magnet 70 in a direction parallel to a rotation axis 22 of the shaft 21. The power generating element 10 faces a surface of the magnet 70, which surface is opposite a surface attached to the shaft 21. The power generating element 10 may be arranged to face the surface of the magnet 70, which surface is attached to the shaft 21.

[0039] Fig. 7 is a plan view illustrating the magnet and the power generating element comprising the speed sensor according to the fourth embodiment. Fig. Figure 7 illustrates the speed sensor 50 in which the magnet 70 and the power generating element 10 are viewed in the direction parallel to the rotation axis 22 and from the side opposite the shaft 21. It should be noted that the processor 60 in Fig. 7 is not shown. The power generating element 10 is arranged to face the magnet 70 at a position away from a center point 71 of a circle, which is a planar shape of the magnet 70. Note that the rotational speed detector 50 is generally used together with an angle detector that detects a rotation angle of the rotating body. The angle detector includes a disk for optical detection in which an optical slit is formed, a light-emitting unit that generates light, and a light-receiving unit that detects light emitted by the light-emitting unit and passing through the optical slit. The disk is fixed to the rotating body, for example, on an upper surface side of the magnet 70. The light-emitting unit and the light-receiving unit are provided at positions facing the optical slit. Fig. 7 the angle detector is not shown.

[0040] The rotation speed sensor 50 according to the fourth embodiment can prevent the voltage generated in the take-up coil 12 from being reduced due to the manufacturing variations of the magnet wires 11, and thus can increase the voltage generated in the take-up coil 12 by the rotation of the shaft 21. Fifth embodiment.

[0041] Fig. 8 is a perspective view illustrating a configuration of a power generator according to a fifth embodiment. A power generator 100 according to the fifth embodiment includes a rotor 80 and a stator 90. The rotor 80 includes a base 81 having a columnar shape and a plurality of magnets 82 arranged on an outer peripheral surface of the base 81. The plurality of magnets 82 are arranged, for example, such that the magnet 82 with an outwardly facing north pole and the magnet 82 with an outwardly facing south pole alternate in the circumferential direction of the base 81. The stator 90 includes a plurality of power generation elements 10 arranged on a single arc centered on a central rotational axis 83 of the rotor 80. The plurality of power generation elements 10 are installed at equal angular intervals. In the fifth embodiment, 12 pieces of the power generation elements 10 are arranged at intervals of 30 degrees.

[0042] Fig.9 is a perspective view illustrating a configuration of the power generation element included in the stator of the power generator according to the fifth embodiment. The power generation element 10 includes a plurality of magnet wires 11, the take-up coil 12 wound around the plurality of magnet wires 11, and the magnetic connectors 13 arranged at both ends of the magnet wires 11. The magnetic connector 13 includes the tube 133 and the magnetic resin seal 134 with which the interior of the tube 133 is filled. In the fifth embodiment, the power generation element 10 including the stator 90 of the power generator 100 has a configuration similar to the power generation element 10 according to the second embodiment, but the number of magnet wires 11 is larger than that of the power generation element 10 according to the second embodiment and is typically in the range of two to three locations.However, the number of magnet wires 11 may be single or four or more, and is not limited to a specific number. As with the power generation element 10 according to the second embodiment, the magnetic resin seal 134 is provided between the ends of the magnet wires 11, so that the ends of the magnet wires 11 are magnetically connected to each other.

[0043] The magnets 82 of the rotor 80 are magnetized to generate magnetic lines of force that penetrate the pickup coils 12. As the rotor 80 rotates, the power generating elements 10 are alternately switched between a state in which they face the N pole and a state in which they face the S pole, so that an alternating voltage is generated in the pickup coils 12.

[0044] In a general power generator, an iron core is often arranged in a winding as a magnetic material with high permeability to efficiently generate power with respect to the rotation of the magnets. The power generator 100 according to the fifth embodiment uses a bundle of magnet wires 11 instead of the iron core, which can achieve a voltage higher by the amount of energy than that of the general power generator generated by the magnet wires 11 undergoing magnetization reversal.

[0045] Note that, although an example has been described here in which the stator 90 includes the power generation element 10 having a similar structure to the power generation element 10 according to the second embodiment, the power generation element 10 included in the stator 90 may have a similar structure to the power generation element 10 according to the first embodiment.

[0046] The configurations shown in the above embodiments are each merely an example and therefore may be combined with other known techniques or may be partially omitted and / or modified without departing from the scope of the present invention. List of reference symbols 10 power generation element; 11 magnet wire; 12 take-up reel; 13 magnetic connector; 20 power generation module; 21 wave; 22 axis of rotation; 30 magnetizers; 31 first magnet; 32 second magnet; 33 spacers; 40 housings; 41, 42 frame part; 43 base plate; 44 recess; 50 speed sensor; 60 processor; 70, 82 magnet; 71 middle; 80 rotor; 81 base; 83 central axis of rotation; 90 stator; 100 power generator; 131 magnetic tube; 132 resin sealant; 133 pipe; 134 magnetic resin seal; 135 magnetic metal tape. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] JP 2022-519668

[0006]

Claims

[1] A power generating element comprising: a variety of magnetic wires with a large Barkhausen effect; a take-up coil wound around a bundle of the plurality of magnet wires; and magnetic connectors configured to magnetically connect the ends of the plurality of magnet wires at both ends of the plurality of magnet wires. [2] A power generating element according to claim 1, wherein in the plurality of magnet wires: only the two ends are magnetically connected; and sections other than the two ends are not in contact with each other. [3] The power generating element according to claim 1 or 2, wherein the magnetic connectors each comprise: a magnet tube and a resin sealant with which the interior of the magnet tube is filled; and each of the plurality of magnet wires is in contact with the magnet tube. [4] The power generation element according to claim 3, wherein the resin seal is adapted to fix the ends of the plurality of magnet wires so that the magnet wires expand and contract due to magnetostriction in response to a change in an applied magnetic field. [5] A power generating element according to claim 1 or 2, wherein the magnetic connectors each comprise a tube and a magnetic resin seal with which the interior of the tube is filled; and the magnetic resin seal is present between the ends of the plurality of magnet wires. [6] The power generation element according to claim 5, wherein the magnetic resin seal is configured to fix the ends of the plurality of magnet wires so that the magnet wires expand and contract due to magnetostriction in response to a change in an applied magnetic field. [7] The power generating element according to claim 1 or 2, wherein the magnetic connectors are each a magnetic metal tape wound around the ends of the plurality of magnetic wires. [8] A power generation module comprising: the power generating element according to any one of claims 1 to 7; and a magnetizer configured to perform a rotary motion or a linear motion so as to switch a magnetic pole applied to the power generating element, wherein the power generating element is designed to generate power through the rotary motion or linear motion of the magnetizer. [9] Power generation module according to claim 8, wherein the plurality of magnet wires are arranged side by side in a second direction which is a direction perpendicular to a first direction as the longitudinal direction, and the magnetizer comprises a plurality of magnets arranged side by side and spaced apart from one another along the second direction. [10] A speed detector comprising: the power generating element according to any one of claims 1 to 7; a magnetizer adapted to perform a rotary motion so that a magnetic pole applied to the power generating element is switched; and a processor adapted to count a pulse based on a voltage generated in the pickup coil by the rotational movement of the magnetizer. [11] A power generator comprising: a rotor comprising a base having a columnar shape and a plurality of magnets arranged on an outer peripheral surface of the base; and a stator in which the power generating elements according to any one of claims 1 to 7 are arranged at equal angular intervals on a single arc centered on a central axis of rotation of the rotor, wherein the plurality of magnets are arranged so that the magnet with an outwardly facing north pole and the magnet with an outwardly facing south pole alternate in the circumferential direction of the base.

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