WO2014017414A1 - 発電素子 - Google Patents
発電素子 Download PDFInfo
- Publication number
- WO2014017414A1 WO2014017414A1 PCT/JP2013/069735 JP2013069735W WO2014017414A1 WO 2014017414 A1 WO2014017414 A1 WO 2014017414A1 JP 2013069735 W JP2013069735 W JP 2013069735W WO 2014017414 A1 WO2014017414 A1 WO 2014017414A1
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- WO
- WIPO (PCT)
- Prior art keywords
- magnetic
- rod
- magnetostrictive
- magnetostrictive rod
- male screw
- Prior art date
Links
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- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
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- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
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- 241001044340 Marma Species 0.000 description 1
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Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
- H02N2/186—Vibration harvesters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N35/00—Magnetostrictive devices
- H10N35/101—Magnetostrictive devices with mechanical input and electrical output, e.g. generators, sensors
Definitions
- the present invention relates to a power generation element.
- the power generation unit (power generation element) described in Patent Document 1 includes, for example, a rod-shaped super magnetostrictive member (magnetostrictive rod), two permanent magnets attached to both ends of the super magnetostrictive member, and the super magnetostrictive member. And a wound coil. Then, the permeability of the giant magnetostrictive member is changed by compressively deforming the giant magnetostrictive member in its axial direction or bending it in a direction perpendicular to the axial direction (compression deformation and extension deformation). As a result, the magnetic field around the giant magnetostrictive member is changed to generate a voltage in the coil.
- the present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a power generation element that can efficiently generate power by securely fixing a magnetostrictive rod to another constituent member.
- a magnetostrictive rod made of a magnetostrictive material and passing magnetic lines of force in the axial direction;
- a magnetic rod made of a magnetic material, which is provided together with the magnetostrictive rod;
- a first coupling mechanism that couples one end of the magnetostrictive rod and one end of the magnetic rod;
- a second connecting mechanism for connecting the other end of the magnetostrictive rod and the other end of the magnetic rod;
- a coil that is arranged so that the lines of magnetic force pass in the axial direction and generates a voltage based on a change in density of the lines of magnetic force caused by expansion and contraction of the magnetostrictive rod;
- At least one of the one end part and the other end part of the magnetostrictive rod is constituted by a male screw part.
- (6) a magnet that is provided in contact with the one end of the magnetostrictive rod and generates the lines of magnetic force;
- the power generating element according to any one of (1) to (5), wherein the magnet and the one end portion of the magnetic rod are connected to each other, and the connecting portion is made of a magnetic material.
- connection portion is formed integrally with the magnetic rod.
- the one end portion of the magnetostrictive rod is constituted by the male screw portion
- the first coupling mechanism includes a first block body formed with a female screw portion that is screwed with the male screw portion, and a fixing structure that fixes the one end portion of the magnetic rod to the first block body.
- a power generating element according to any one of (1) to (7).
- the fixing structure includes a screw that fixes the one end of the magnetic rod to the first block body, and a screw hole that is formed in the first block body and is screwed into the screw.
- the one end portion of the magnetic rod is also composed of a male screw portion
- the fixing structure includes the male threaded portion of the magnetic rod and the second female threaded portion formed on the first block body that is screwed with the male threaded portion (8).
- the other end portion of the magnetostrictive rod is constituted by the male screw portion
- the second coupling mechanism is provided on the other end portion side of the magnetic rod, and is inserted into the through hole and a flat plate portion made of a magnetic material having a through hole through which the male screw portion can be inserted.
- the power generation element according to any one of (1) to (10), further including a second block body formed with a female screw portion that is screwed into the male screw portion.
- the other end portion of the magnetic rod is also constituted by a male screw portion
- the flat plate portion includes a second through hole into which the male screw portion of the magnetic rod can be inserted
- the power generating element according to (11) further including a third block body in which a female screw portion that is screwed with the male screw portion of the magnetic rod inserted through the second through hole is formed.
- the magnetostrictive rod can be securely fixed to other components, the magnetostrictive rod can be efficiently expanded and contracted, and as a result, the power generation efficiency can be improved.
- FIG. 1 is a perspective view showing a first embodiment of the power generating element of the present invention.
- FIG. 2 is an exploded perspective view of the power generation element shown in FIG. 3 is a longitudinal sectional view (a sectional view taken along line AA in FIG. 1) of the power generating element shown in FIG.
- FIG. 4 is an enlarged view showing a tip side portion of the second embodiment of the power generating element of the present invention.
- FIG. 5 is an exploded perspective view showing a third embodiment of the power generating element of the present invention. 6 is a longitudinal sectional view of the power generation element shown in FIG.
- FIG. 1 is a perspective view showing a first embodiment of the power generating element of the present invention
- FIG. 2 is an exploded perspective view of the power generating element shown in FIG. 1
- FIG. 3 is a longitudinal sectional view of the power generating element shown in FIG. 1 is a sectional view taken along line AA in FIG.
- FIGS. 1 to 3 the upper side in FIGS. 1 to 3 is referred to as “upper” or “upper”, and the lower side is referred to as “lower” or “lower”.
- the right side in FIGS. 1 to 3 is referred to as a “tip”, and the left side is referred to as a “base end”.
- the power generating element 1 shown in FIGS. 1 and 2 includes a magnetostrictive rod 2 that passes magnetic lines of force in the axial direction, a magnetic rod 3 provided alongside the magnetostrictive rod 2, a coil 5 provided on the outer peripheral side of the magnetostrictive rod 2, A first connecting mechanism 6 that connects the base end (one end) of the magnetostrictive rod 2 and the base end (one end) of the magnetic rod 3, the tip (other end) of the magnetostrictive rod 2, and the magnetic rod 3. A second coupling mechanism 7 that couples the leading end portion (the other end portion) and a magnetic field application mechanism 8 that applies a bias magnetic field to the magnetostrictive rod 2.
- the distal end (the other end) is displaced relative to the base end (one end) of the magnetostrictive rod 2 in a direction substantially perpendicular to the axial direction, that is, as shown in FIG.
- the magnetostrictive rod 2 is expanded and contracted by moving in the direction.
- the magnetic permeability of the magnetostrictive rod 2 changes due to the inverse magnetostrictive effect, and the density of the magnetic lines passing through the magnetostrictive rod 2 (the density of the magnetic lines passing through the inner cavity of the coil 5) changes, whereby a voltage is applied to the coil 5.
- the magnetostrictive rod 2 is made of a magnetostrictive material, and is arranged with the direction in which magnetization is likely to occur (direction of easy magnetization) as the axial direction.
- the magnetostrictive rod 2 has a long cylindrical shape, and passes lines of magnetic force in the axial direction thereof.
- the magnetostrictive rod 2 includes a main body portion 21, a proximal-side male screw portion (one end portion) 22 provided at the proximal end of the main body portion 21, and a distal-side male screw portion (others) provided at the distal end of the main body portion 21. End) 23.
- the magnetostrictive rod 2 is connected to the first connecting mechanism 6 at the proximal end side male screw portion 22 and is connected to the second connecting mechanism 7 at the distal end side male screw portion 23.
- the effective cross-sectional area (effective diameter) of the base end side male screw part 22 is set larger than the cross-sectional area (diameter) of the main body part 21. Thereby, when expanding and contracting the magnetostrictive rod 2, it is possible to increase the bonding strength between the base end side male screw portion 22 to which a particularly large load is applied and the first block body 61 of the first coupling mechanism 6.
- the effective cross-sectional area (effective diameter) of the distal-end-side male screw part 23 is set substantially equal to the cross-sectional area (diameter) of the main body part 21.
- the magnetostrictive rod 2 is provided at the base end portion of the main body 21 (the portion on the tip end side from the base end side male screw portion 22) along the circumferential direction and continuously to the base end side male screw portion 22.
- An annular flange portion 24 is provided.
- the front end surface of the flange portion 24 forms an inclined surface that is inclined with respect to the axial direction of the magnetostrictive rod 2.
- the magnetostrictive rod 2 is provided with an annular flange portion 25 provided along the circumferential direction at the distal end portion of the main body portion 21 (portion on the proximal end side from the distal end-side male screw portion 23).
- the distal end surface of the flange portion 25 constitutes a plane that is substantially perpendicular to the axial direction of the magnetostrictive rod 2, and the proximal end surface constitutes an inclined surface that is inclined with respect to the axial direction of the magnetostrictive rod 2.
- the average cross-sectional area of the main body 21 is preferably about 0.2 to 10.0 mm 2 , and more preferably about 0.7 to 7.0 mm 2 . Further, the length of the main body 21 is preferably about 5 to 40 mm, more preferably about 10 to 30 mm.
- the effective cross-sectional area of the base end side male screw part 22 is preferably 1.5 times or more, more preferably about 2.0 times the average cross-sectional area of the main body part 21.
- the length of the base end side male screw portion 22 is preferably 0.5 times or more of the average cross-sectional area of the main body portion 21 and more preferably about twice. Thereby, the joint strength of the base end side external thread part 22 and the 1st block body 61 can be raised more.
- the effective cross-sectional area of the front end-side male screw part 23 is preferably 1.0 times or more, more preferably about 1.5 times the average cross-sectional area of the main body part 21. Further, the length of the distal male screw portion 23 is preferably 0.5 times or more, more preferably about twice the average cross-sectional area of the main body portion 21. Thereby, the joining strength of the front end side male screw part 23 and the 2nd block body 72 can be raised more.
- the maximum cross-sectional area of the flange portion 25 is preferably 1.5 times or more, more preferably about twice the effective cross-sectional area of the front end side male screw portion 23.
- the Young's modulus of the magnetostrictive material is preferably about 40 to 100 GPa, more preferably about 50 to 90 GPa, and further preferably about 60 to 80 GPa.
- the magnetostrictive rod 2 can be expanded and contracted more greatly. For this reason, since the magnetic permeability of the magnetostrictive rod 2 can be changed more greatly, the power generation efficiency of the power generation element 1 (coil 5) can be further improved.
- Such a magnetostrictive material is not particularly limited, and examples thereof include an iron-gallium alloy, an iron-cobalt alloy, an iron-nickel alloy, and the like, and one or more of these can be used in combination. .
- a magnetostrictive material mainly composed of an iron-gallium alloy (Young's modulus: about 70 GPa) is preferably used.
- a magnetostrictive material mainly composed of an iron-gallium alloy (in particular, an iron-gallium alloy containing gallium in an amount of 15 to 20 wt%) is easily set within the range of Young's modulus as described above.
- such a magnetostrictive material has appropriate ductility, and the base end side male screw portion 22 and the front end side male screw portion 23 are easily formed by, for example, cutting, wire electric discharge processing, laser processing, or the like. For this reason, the processing cost of the magnetostrictive rod 2 can be reduced.
- the magnetostrictive material as described above preferably contains at least one of rare earth metals such as Y, Pr, Sm, Tb, Dy, Ho, Er, and Tm. Thereby, the change of the magnetic permeability of the magnetostriction stick
- rod 2 can be enlarged more.
- a magnetic rod 3 is provided along with the magnetostrictive rod 2.
- the magnetic rod 3 is made of a magnetic material, and the lines of magnetic force that have passed through the magnetostrictive rod 2 pass in the axial direction.
- the magnetic rod 3 has a long flat plate shape having a substantially constant thickness.
- the magnetic bar 3 includes a main body 31 and a widened portion (other end) 39 that is provided at the base end of the main body 31 and is wider than the main body 31.
- the magnetic bar 3 is coupled to the first coupling mechanism 6 at the widened portion 39 and coupled to the second coupling mechanism 7 at the tip.
- the widened portion 39 is formed with two through holes 391 and 392 that penetrate in the thickness direction. Screws 62 and 63 of the first coupling mechanism 6 to be described later are inserted into the through holes 391 and 392.
- the average thickness of the magnetic bar 3 is preferably about 0.5 to 3.0 mm, more preferably about 0.8 to 2.0 mm, although it depends on the constituent material of the magnetic bar 3.
- the Young's modulus of the magnetic material constituting the magnetic rod 3 and the Young's modulus of the magnetostrictive material constituting the magnetostrictive rod 2 may be different, but are preferably substantially equal. As a result, the magnetostrictive rod 2 can be smoothly and reliably displaced in the vertical direction as shown in FIG. Specifically, the Young's modulus of the magnetic material is preferably about 40 to 100 GPa, more preferably about 50 to 90 GPa, and further preferably about 60 to 80 GPa.
- the magnetic material is not particularly limited.
- pure iron for example, JIS SUY
- soft iron for example, carbon steel
- electromagnetic steel silicon steel
- high-speed tool steel for example, structural steel (for example, JIS SS400), stainless steel marma Roy etc.
- structural steel for example, JIS SS400
- the coil 5 is disposed on the outer periphery of the main body 21 of the magnetostrictive rod 2 so as to surround the main body 21.
- the coil 5 is configured by winding a wire around the outer periphery of the main body 21. Thereby, the coil 5 is arrange
- a voltage is generated in the coil 5 based on a change in the magnetic permeability of the magnetostrictive rod 2, that is, a change in the density of magnetic lines of force (magnetic flux density) passing through the magnetostrictive rod 2.
- the constituent material of the wire is not particularly limited, and examples thereof include a wire in which a copper base line is coated with an insulating film, a wire in which a copper base line is coated with an insulating film with a fusion function, and the like. These can be used alone or in combination of two or more.
- the number of windings of the wire is appropriately set according to the cross-sectional area of the wire and is not particularly limited, but is preferably about 100 to 500, and more preferably about 150 to 450.
- the cross-sectional area of the wire is preferably from 5 ⁇ 10 -4 ⁇ 0.126mm 2 mm, and more preferably 2 ⁇ 10 -3 ⁇ 0.03mm 2 approximately.
- the cross-sectional shape of the wire may be any shape such as a polygon such as a triangle, a square, a rectangle, and a hexagon, a circle, and an ellipse.
- the base end side male screw portion 22 of the magnetostrictive rod 2 and the widened portion 39 of the magnetic rod 3 are connected by the first connecting mechanism 6.
- First connecting mechanism 6 functions as a fixing
- the power generating element 1 is cantilevered with the base end as a fixed end and the front end as a movable end.
- the first coupling mechanism 6 includes a rectangular parallelepiped first block body 61 and screws 62 and 63.
- the first block body 61 is formed with a female screw portion 611 that opens to the front end surface, a magnet storage portion 612 that opens to the base end surface, and two screw holes 613 and 614 that open to the top surface.
- the base end side male screw portion 22 of the magnetostrictive rod 2 is screwed into the female screw portion 611, and screws 62 and 63 are screwed into the screw holes 613 and 614.
- the magnet storage unit 612 stores a permanent magnet 81 described later.
- the female screw part 611 and the magnet storage part 612 are formed concentrically (coaxially) along the axial direction of the first block body 61.
- the female screw portion 611 and the magnet storage portion 612 communicate with each other. With this configuration, the distal end surface of the permanent magnet 81 accommodated in the magnet accommodating portion 612 can be brought into contact with the proximal end surface of the proximal end side male screw portion 22 screwed into the female screw portion 611.
- the screws 62 and 63 are inserted into the through holes 391 and 392 formed in the widened portion 39 of the magnetic bar 3 and screwed into the screw holes 613 and 614.
- the magnetic bar 3 is fixed to the first block body 61. That is, in this embodiment, the fixing structure for fixing the widened portion (one end portion) 39 of the magnetic bar 3 to the first block body 61 is configured by the screws 62 and 63 and the screw holes 613 and 614.
- the screw holes 613 and 614 are formed so as to pass through in the thickness direction of the first block body 61 and the total length of the screws 62 and 63 is designed to be long so that the screws 62 and 63 protrude from the power generation element 1. This portion can be used to fix the power generating element 1 to a housing or the like.
- the first block body 61 can be made of a nonmagnetic material.
- nonmagnetic materials include, but are not limited to, metal materials, semiconductor materials, ceramic materials, resin materials, and the like, and these can be used alone or in combination.
- a resin material it is preferable to add a filler in a resin material.
- nonmagnetic material whose main component is a metal material
- a nonmagnetic material whose main component is at least one of aluminum, magnesium, zinc, copper and alloys containing these. More preferred.
- the second coupling mechanism 7 is a part that applies an external force or vibration to the magnetostrictive rod 2.
- the magnetostrictive rod 2 has its base end as a fixed end and the tip reciprocates in the vertical direction. (The distal end is displaced relative to the proximal end).
- the second coupling mechanism 7 is provided continuously with the tip of the magnetic bar 3 and a flat plate portion 71 formed with a through hole 711 through which the tip side male screw portion 23 of the magnetostrictive rod 2 can be inserted.
- the second block body 72 is formed with a female screw portion 721 that is screwed into the front-end-side male screw portion 23 inserted through the through hole 711.
- the flat plate portion 71 is disposed so as to be substantially perpendicular to the axial direction of the magnetic bar 3 and is formed integrally with the magnetic bar 3.
- the through hole 711 is formed so as to penetrate in the thickness direction of the flat plate portion 71. Therefore, the axial direction of the through hole 711 and the axial direction of the magnetostrictive rod 2 are substantially parallel.
- the second block body 72 has a cylindrical shape, and the female screw portion 721 is formed along the axial direction of the second block body 72 and is open to the base end surface thereof.
- the distal-side male threaded portion 23 is always subjected to a tensile stress, the magnetic permeability increases due to the inverse magnetostrictive effect of the magnetostrictive material, and the magnetic lines of force can pass more efficiently.
- the flat plate portion 71 is formed integrally with the magnetic rod 3 using a magnetic material, and in this embodiment, the magnetic lines of force that have passed through the magnetostrictive rod 2 pass through the flat plate portion 71 as shown in FIG. It is configured to face the magnetic bar 3.
- the second block 72 may be made of a magnetic material, but can also be made of a non-magnetic material as described above.
- a magnetic field applying mechanism 8 for applying a bias magnetic field to the magnetostrictive rod 2 is provided on the proximal end side of the magnetostrictive rod 2.
- Magnetic field application mechanism 8 As shown in FIGS. 2 and 3, the magnetic field application mechanism 8 is provided continuously with the permanent magnet 81 and the proximal end of the magnetic rod 3, and holds the permanent magnet 81 between the proximal end surface of the magnetostrictive rod 2.
- the connection part 82 is comprised.
- the permanent magnet 81 has a disk shape (a relatively thin cylindrical shape).
- the connecting portion 82 has a flat plate shape and is integrally formed with the magnetic rod 3 so as to be substantially perpendicular to the axial direction of the magnetic rod 3.
- the permanent magnet 81 and the widened portion 39 of the magnetic bar 3 are connected via the connecting portion 82. Further, as shown in FIG. 3, the permanent magnet 81 is arranged with the N pole on the magnetostrictive rod 2 side and the S pole on the connecting portion 82 side. A magnetic field loop is formed.
- the permanent magnet 81 for example, an alnico magnet, a ferrite magnet, a neodymium magnet, a samarium cobalt magnet, or a magnet (bond magnet) formed by molding a composite material obtained by pulverizing them and kneading them into a resin material or a rubber material is used. be able to. Further, the connecting portion 82 is formed integrally with the magnetic rod 3 using a magnetic material.
- the magnetic permeability of the magnetostrictive rod 2 changes due to the inverse magnetostrictive effect, and the density of magnetic lines of force passing through the magnetostrictive bar 2 (density of magnetic lines of force penetrating through the lumen of the coil 5 in the axial direction) changes. As a result, a voltage is generated in the coil 5.
- the magnetostrictive rod 2 is connected to the first block body 61 and the second block body 72 by screwing. For this reason, even when the magnetostrictive rod 2 expands and contracts, a high bonding force is maintained between them, and the power generation element 1 can generate power more efficiently.
- the depth at which the distal-side male screw portion 23 is screwed into the female screw portion 721 of the second block body 72 can be adjusted.
- the distal-side male threaded portion 23 can always be extended, so that the magnetic permeability at the distal-side male threaded portion 23 is improved.
- the magnetic lines of force can be smoothly passed from the magnetostrictive rod 2 toward the magnetic rod 3. Therefore, the power generation efficiency of the power generation element 1 can be increased.
- the permanent magnet 81 can be disposed in contact with the magnetostrictive rod 2 and coaxially with the magnetostrictive rod 2. For this reason, the utilization efficiency by the power generation element 1 of the magnetic force line which the permanent magnet 81 generates can be improved. From this point of view, the power generation efficiency of the power generation element 1 can be increased.
- the power generation amount of the power generation element 1 is not particularly limited, but is preferably about 100 to 1400 ⁇ J. If the power generation amount (power generation capability) of the power generation element 1 is within the above range, for example, by combining with a wireless device, it can be effectively used for a home lighting wireless switch, a home security system, and the like described later.
- FIG. 4 is an enlarged view showing a tip side portion of the second embodiment of the power generating element of the present invention.
- the upper side in FIG. 4 is referred to as “upper” or “upper”, and the lower side is referred to as “lower” or “lower”.
- the right side in FIG. 4 is referred to as “tip”, and the left side is referred to as “base end”.
- the power generation element of the second embodiment will be described focusing on the differences from the power generation element of the first embodiment, and description of similar matters will be omitted.
- the power generation element 1 of the second embodiment is the same as the power generation element 1 of the first embodiment except that the configuration of the protrusions provided along the circumferential direction of the magnetostrictive rod 2 is different. That is, in the power generating element 1 shown in FIG. 4, the protruding portion is configured by the nut 26 instead of the flange portion 25.
- a screw thread is formed on one of the inner peripheral surface of the nut 26 and the outer peripheral surface of the magnetostrictive rod 2, and a thread groove that is screwed into the screw thread is formed on the other.
- the nut 26 can move along the axial direction of the magnetostrictive rod 2 and can rotate about the axis of the magnetostrictive rod 2.
- the nut 26 by moving the nut 26 in the axial direction of the magnetostrictive rod 2, it is possible to adjust the degree of extension of the distal male screw portion 23 of the magnetostrictive rod 2.
- the structure of the magnetostrictive rod 2 can be simplified as compared with the magnetostrictive rod 2 of the first embodiment. The amount used can be reduced, and the production cost of the magnetostrictive rod 2 (the production cost of the power generating element 1) can be reduced.
- the power generation element 1 according to the second embodiment produces the same operations and effects as the power generation element 1 according to the first embodiment.
- FIG. 5 is an exploded perspective view showing a third embodiment of the power generation element of the present invention
- FIG. 6 is a longitudinal sectional view of the power generation element shown in FIG.
- FIGS. 5 and 6 the upper side in FIGS. 5 and 6 is referred to as “upper” or “upper”, and the lower side is referred to as “lower” or “lower”. Further, the right side in FIGS. 5 and 6 is referred to as “tip”, and the left side is referred to as “base end”.
- the power generating element of the third embodiment will be described focusing on the differences from the power generating elements of the first and second embodiments, and the description of the same matters will be omitted.
- the power generation element 1 of the third embodiment is the same as the power generation element 1 of the first embodiment except that the following points are different.
- the base end side male screw portion 22 and the distal end side male screw portion 23, the flange portion 24 and the flange portion 25 have the same configuration, and further, the entire configuration of the magnetostrictive rod 2
- the overall configuration of the magnetic bar 3 is the same. That is, the magnetic bar 3 has a long cylindrical shape, and is provided at the main body 31, a proximal-side male screw portion (one end) 32 provided at the proximal end of the main body 31, and the distal end of the main body 31.
- the distal end side male screw portion (other end portion) 33 and annular flange portions 34 and 35 provided along the circumferential direction of the proximal end portion and the distal end portion of the main body portion 31 are provided.
- the first block body 61 of the first coupling mechanism 6 has a female screw portion to which the proximal end side male screw portion 22 of the magnetostrictive rod 2 and the proximal end side male screw portion 32 of the magnetic rod 3 can be respectively screwed. 611 and a second female screw portion 615 are formed penetrating in the axial direction of the first block body 61 (from the distal end surface to the proximal end surface). That is, in the present embodiment, one end of the magnetic bar 3 is changed to the first block body 61 by the proximal male screw portion 32 of the magnetic rod 3 and the second female screw portion 615 of the first block body 61.
- a fixing structure for fixing is configured.
- the flat plate portion 71 of the second coupling mechanism 7 is separate from the magnetic rod 3, and the distal male screw portion 33 of the magnetic rod 3 can be inserted into the flat plate portion 71 in addition to the through hole 711.
- a second through hole 712 is formed.
- the power generating element 1 of the present embodiment is a female screwed into the distal-side male screw portion 33 of the magnetic rod 3 inserted into the second through hole 712 of the flat plate portion 71, separately from the second block body 72.
- a cylindrical third block body 73 having a screw portion 731 formed thereon.
- the third block body 73 is fixed to the second block body 72 via an adhesive layer 74 composed of, for example, an adhesive or the like in a state where the power generating element 1 is assembled.
- the connecting portion 82 of the magnetic field applying mechanism 8 is separated from the magnetic rod 3 and has a stepped shape such as a flat plate bent.
- the connection portion 82 is made of a magnetic material, and is disposed so as to connect the permanent magnet 81 and the proximal end side male screw portion (one end portion) 32 of the magnetic rod 3.
- the connecting portion 82 is preferably fixed to the first block body 61 together with the permanent magnet 81, for example, by bonding with an adhesive or the like.
- the power generation element 1 according to the third embodiment produces the same operations and effects as those of the power generation element 1 according to the first and second embodiments.
- the bonding strength between the magnetostrictive rod 2 and the first block body 61 and the second block body 72, the magnetic rod 3, the first block body 61 and the third block body 73, The bonding strength can be made equal. This contributes to improvement and stabilization of the strength of the power generation element 1 as a whole.
- the coil 5 may be provided on the outer peripheral side of the magnetic rod 3 in place of the outer peripheral side of the magnetostrictive rod 2, or may be provided on both the outer peripheral side of the magnetostrictive rod 2 and the outer peripheral side of the magnetic rod 3. . Moreover, you may make it comprise the magnetic rod 3 using a magnetostriction material.
- the power generation element as described above includes a transmitter power source, a sensor network power source, a home lighting wireless switch, a system for monitoring the state of each part of the vehicle (for example, a tire pressure sensor, a seat belt wearing detection sensor), and a home security system. (In particular, it can be used for a system that notifies operation detection of windows and doors wirelessly).
- the power generation element of the present invention may be configured to generate power using an external magnetic field (external magnetic field) without a permanent magnet.
- the magnetostrictive rod and the magnetic rod both have a circular cross-sectional shape, for example, an elliptical shape, a triangular shape, a rectangular shape, a square shape, a hexagonal shape, etc. It may be a polygonal shape.
- the coil may be composed of a bobbin and a wire wound around the bobbin.
- the magnetostrictive rod can be securely fixed to other components, the magnetostrictive rod can be efficiently expanded and contracted, and as a result, the power generation efficiency of the power generation element can be improved. Therefore, the present invention has industrial applicability.
Abstract
Description
(1) 磁歪材料で構成され、軸方向に磁力線を通過させる磁歪棒と、
該磁歪棒と併設され、磁性材料で構成された磁性棒と、
前記磁歪棒の一端部と前記磁性棒の一端部とを連結する第1の連結機構と、
前記磁歪棒の他端部と前記磁性棒の他端部とを連結する第2の連結機構と、
前記磁力線が軸方向に通過するように配置され、前記磁歪棒の伸縮により生じる前記磁力線の密度の変化に基づいて電圧が発生するコイルとを有し、
前記磁歪棒の前記一端部および前記他端部の少なくとも一方が、雄ネジ部で構成されていることを特徴とする発電素子。
該磁石と、前記磁性棒の前記一端部とを接続し、磁性材料で構成された接続部とを有する上記(1)ないし(5)のいずれかに記載の発電素子。
前記第1の連結機構は、前記雄ネジ部と螺合する雌ネジ部が形成された第1のブロック体と、前記磁性棒の前記一端部を前記第1のブロック体に固定する固定構造とを備える上記(1)ないし(7)のいずれかに記載の発電素子。
前記固定構造は、前記磁性棒の前記雄ネジ部と、該雄ネジ部と螺合する前記第1のブロック体に形成された前記第2の雌ネジ部とで構成されている上記(8)に記載の発電素子。
前記第2の連結機構は、前記磁性棒の前記他端部側に設けられ、前記雄ネジ部を挿通可能な貫通孔を備える磁性材料で構成された平板部と、前記貫通孔に挿通された前記雄ネジ部と螺合する雌ネジ部が形成された第2のブロック体とを備える上記(1)ないし(10)のいずれかに記載の発電素子。
前記平板部は、前記磁性棒の前記雄ネジ部を挿通可能な第2の貫通孔を備え、
さらに、前記第2の貫通孔に挿通された前記磁性棒の前記雄ネジ部と螺合する雌ネジ部が形成された第3のブロック体を有する上記(11)に記載の発電素子。
<第1実施形態>
まず、本発明の発電素子の第1実施形態について説明する。
<<磁歪棒2>>
磁歪棒2は、磁歪材料で構成され、磁化が生じ易い方向(磁化容易方向)を軸方向として配置されている。本実施形態では、磁歪棒2は、長尺の円柱状をなしており、その軸方向に磁力線を通過させる。
この磁歪棒2に対して、磁性棒3が併設されている。
磁性棒3は、磁性材料で構成され、その軸方向に、磁歪棒2を通過した磁力線が通過する。本実施形態では、磁性棒3は、ほぼ一定の厚さを有する長尺の平板状をなしている。
コイル5は、線材を本体部21の外周に巻回することにより構成されている。これにより、コイル5は、磁歪棒2を通過している磁力線が、その軸方向に通過する(内腔部を貫く)ように配設されている。このコイル5には、磁歪棒2の透磁率の変化、すなわち、磁歪棒2を通過する磁力線の密度(磁束密度)の変化に基づいて、電圧が発生する。
第1の連結機構6は、発電素子1を筐体等に固定するための固定部として機能する。第1の連結機構6を介して発電素子1を固定することにより、発電素子1は、その基端を固定端、先端を可動端として片持ち支持される。
第2の連結機構7は、磁歪棒2に対して外力や振動を付与する部位である。第2の連結機構7に対して、図3の上または下への外力、または、上下方向の振動を付与すると、磁歪棒2は、その基端を固定端とし、先端が上下方向に往復動(先端が基端に対して相対的に変位)する。
磁界印加機構8は、図2および図3に示すように、永久磁石81と、磁性棒3の基端に連続して設けられ、磁歪棒2の基端面との間に永久磁石81を保持する接続部82とで構成されている。
なお、発電素子1の発電量は、特に限定されないが、100~1400μJ程度であるのが好ましい。発電素子1の発電量(発電能力)が上記範囲内であれば、例えば、無線装置と組み合わせることで、後述する住宅照明用無線スイッチや住宅セキュリティー用システム等に有効に利用することができる。
次に、本発明の発電素子の第2実施形態について説明する。
なお、以下の説明では、図4中の上側を「上」または「上方」と言い、下側を「下」または「下方」と言う。また、図4中の右側を「先端」と言い、左側を「基端」と言う。
次に、本発明の発電素子の第3実施形態について説明する。
例えば、前記第1~第3実施形態の任意の構成を組み合わせることもできる。
Claims (13)
- 磁歪材料で構成され、軸方向に磁力線を通過させる磁歪棒と、
該磁歪棒と併設され、磁性材料で構成された磁性棒と、
前記磁歪棒の一端部と前記磁性棒の一端部とを連結する第1の連結機構と、
前記磁歪棒の他端部と前記磁性棒の他端部とを連結する第2の連結機構と、
前記磁力線が軸方向に通過するように配置され、前記磁歪棒の伸縮により生じる前記磁力線の密度の変化に基づいて電圧が発生するコイルとを有し、
前記磁歪棒の前記一端部および前記他端部の少なくとも一方が、雄ネジ部で構成されていることを特徴とする発電素子。 - 前記雄ネジ部の有効横断面積は、前記磁歪棒の前記一端部および前記他端部以外の部分の横断面積より大きい請求項1に記載の発電素子。
- 前記磁歪棒は、前記一端部および前記他端部以外の部分に、その周方向に沿って設けられた突出部を備える請求項1または2に記載の発電素子。
- 前記突出部は、前記磁歪棒の軸方向に沿って移動可能、かつ、前記磁歪棒の軸回りに回転可能に設けられている請求項3に記載の発電素子。
- 前記コイルは、前記磁歪棒の前記一端部および前記他端部以外の部分の外周側に、当該部分を囲むように配置されている請求項1ないし4のいずれかに記載の発電素子。
- 前記磁歪棒の前記一端部に接触して設けられ、前記磁力線を発生する磁石と、
該磁石と、前記磁性棒の前記一端部とを接続し、磁性材料で構成された接続部とを有する請求項1ないし5のいずれかに記載の発電素子。 - 前記接続部は、前記磁性棒と一体的に形成されている請求項6に記載の発電素子。
- 前記磁歪棒の前記一端部が、前記雄ネジ部で構成され、
前記第1の連結機構は、前記雄ネジ部と螺合する雌ネジ部が形成された第1のブロック体と、前記磁性棒の前記一端部を前記第1のブロック体に固定する固定構造とを備える請求項1ないし7のいずれかに記載の発電素子。 - 前記固定構造は、前記磁性棒の前記一端部を前記第1のブロック体に固定するネジと、前記第1のブロック体に形成され、前記ネジと螺合するネジ穴とで構成されている請求項8に記載の発電素子。
- 前記磁性棒の前記一端部も、雄ネジ部で構成され、
前記固定構造は、前記磁性棒の前記雄ネジ部と、該雄ネジ部と螺合する前記第1のブロック体に形成された前記第2の雌ネジ部とで構成されている請求項8に記載の発電素子。 - 前記磁歪棒の前記他端部が、前記雄ネジ部で構成され、
前記第2の連結機構は、前記磁性棒の前記他端部側に設けられ、前記雄ネジ部を挿通可能な貫通孔を備える磁性材料で構成された平板部と、前記貫通孔に挿通された前記雄ネジ部と螺合する雌ネジ部が形成された第2のブロック体とを備える請求項1ないし10のいずれかに記載の発電素子。 - 前記平板部は、前記磁性棒と一体的に形成されている請求項11に記載の発電素子。
- 前記磁性棒の前記他端部も、雄ネジ部で構成され、
前記平板部は、前記磁性棒の前記雄ネジ部を挿通可能な第2の貫通孔を備え、
さらに、前記第2の貫通孔に挿通された前記磁性棒の前記雄ネジ部と螺合する雌ネジ部が形成された第3のブロック体を有する請求項11に記載の発電素子。
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US14/410,491 US9525122B2 (en) | 2012-07-23 | 2013-07-22 | Power generating element |
DE112013003634.7T DE112013003634B4 (de) | 2012-07-23 | 2013-07-22 | Energieerzeugungselement |
CN201380035042.2A CN104412503B (zh) | 2012-07-23 | 2013-07-22 | 发电元件 |
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CN103534925B (zh) * | 2011-05-16 | 2016-01-20 | 国立大学法人金泽大学 | 发电开关 |
JP6028594B2 (ja) * | 2013-01-28 | 2016-11-16 | 富士電機株式会社 | 発電装置 |
JP6068187B2 (ja) * | 2013-02-25 | 2017-01-25 | 東洋ゴム工業株式会社 | 発電素子 |
DE112014004798T5 (de) * | 2013-12-25 | 2016-07-14 | Sumitomo Riko Company Limited | Leistungserzeugungssystem |
JP6171992B2 (ja) * | 2014-03-12 | 2017-08-02 | 富士電機株式会社 | 発電装置 |
JP6232337B2 (ja) * | 2014-04-30 | 2017-11-15 | 住友理工株式会社 | 磁歪式振動発電装置 |
JP6122882B2 (ja) * | 2015-01-29 | 2017-04-26 | 日本高周波鋼業株式会社 | 磁歪部材およびその製造方法 |
CN105533980B (zh) * | 2016-02-04 | 2017-11-14 | 南京邮电大学 | 发电背带连结扣 |
DE102016003599A1 (de) * | 2016-03-27 | 2017-09-28 | Eto Magnetic Gmbh | Elektrischer linearer repetitiver Impulsantrieb |
EP3447902B1 (en) * | 2016-04-19 | 2021-08-25 | National University Corporation Kanazawa University | Power generation element, method for manufacturing power generation element, and actuator |
CN112066467B (zh) * | 2020-08-20 | 2022-02-01 | 宁波奥克斯电气股份有限公司 | 一种冷却装置及空调设备 |
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DE112013003634B4 (de) | 2016-12-15 |
US20150325778A1 (en) | 2015-11-12 |
CN104412503B (zh) | 2016-12-28 |
DE112013003634T5 (de) | 2015-04-09 |
JP2014023368A (ja) | 2014-02-03 |
CN104412503A (zh) | 2015-03-11 |
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US9525122B2 (en) | 2016-12-20 |
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