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WO2019142612A1 - Dispositif de production d'énergie - Google Patents

Dispositif de production d'énergie Download PDF

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Publication number
WO2019142612A1
WO2019142612A1 PCT/JP2018/047433 JP2018047433W WO2019142612A1 WO 2019142612 A1 WO2019142612 A1 WO 2019142612A1 JP 2018047433 W JP2018047433 W JP 2018047433W WO 2019142612 A1 WO2019142612 A1 WO 2019142612A1
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WO
WIPO (PCT)
Prior art keywords
magnetostrictive material
power generation
diaphragm
magnetostrictive
laminate
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Ceased
Application number
PCT/JP2018/047433
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English (en)
Japanese (ja)
Inventor
淳也 田中
学 五閑
佳子 高橋
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Panasonic Intellectual Property Management Co Ltd
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Panasonic Intellectual Property Management Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Panasonic Intellectual Property Management Co Ltd filed Critical Panasonic Intellectual Property Management Co Ltd
Publication of WO2019142612A1 publication Critical patent/WO2019142612A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • 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
    • H10N35/80—Constructional details

Definitions

  • the present invention relates to a power generation apparatus using an inverse magnetostrictive effect that converts mechanical energy applied to a magnetostrictive element into electrical energy in power generation using vibration.
  • vibration power generation is an extremely versatile power generation method because it can extract electric energy from impact and movement in addition to vibration.
  • piezoelectric method For vibration power generation, there are piezoelectric method, electrostatic induction method, electromagnetic induction method, and magnetostriction method.
  • piezoelectric method using a piezoelectric element has low mechanical durability due to the fragility of the element
  • the electromagnetic induction method there is a movable part.
  • the piezoelectric method has a problem in miniaturization.
  • the magnetostrictive system using a magnetostrictive material using a metallic material is excellent in mechanical characteristics and processability because the magnetostrictive element is a ductile material, and has low electrical impedance. Therefore, the magnetostrictive system is excellent in durability and highly adaptable to various circuits connected to the power generation device.
  • the magnetostrictive vibration power generation element is a power generation system that converts mechanical energy into electrical energy.
  • FIG. 5A and FIG. 5B respectively show a schematic cross-sectional view and a schematic top view of a power generator according to Patent Document 1 to which the magnetostrictive method is applied.
  • a second power generation element 105 made of a non-magnetostrictive material is configured in parallel to the first power generation element 104 made of a magnetostrictive material.
  • the change in magnetic flux that is passively caused for the second power generation element 105 can also be used.
  • the second power generation element 105 is a magnetic material which transmits magnetism such as iron but is not a magnetostrictive material.
  • the magnetic flux changes when the inverse magnetostrictive effect of the first power generation element 104 appears, the change also affects the magnetic flux passing through the second power generation element 105.
  • the second coil 110 can also generate some power.
  • the vibrational energy exerted on the first power generation element 104 can be efficiently converted into electrical energy by the first coil 106 and the second coil 110, and the power generation efficiency is improved by this feature.
  • a power generation apparatus that can be designed.
  • the vibration electric power generating apparatus 100 is equipped with the attachment side member 102 attached fixedly with respect to the vibration member 101.
  • the end side member 103 is disposed separately from the mounting side member 102.
  • the mounting side member 102 and the end side member 103 are connected by the first power generation element 104 and the second power generation element 105.
  • Each of the first power generation element 104 and the second power generation element 105 has a plate-like shape, a rod-like shape, or the like.
  • the first power generation element 104 and the second power generation element 105 are arranged in parallel at a predetermined distance from each other, and each end in the longitudinal direction corresponds to the attachment side member 102 and the end side member. And 103 are fixed.
  • the vibration power generation device 100 is configured as a single beam-like member having a longitudinal form as a whole.
  • the first power generation element 104 is made of a material that is a magnetostrictive element.
  • the first coil 106 is wound around the first power generation element 104 in an extrapolated state, and a magnetic flux as magnetic energy associated with the vibrational deformation caused by the inverse magnetostrictive effect in the first power generation element 104 The change is converted by the first coil 106 into an electromotive force as electrical energy.
  • the second power generation element 105 itself does not have to actively cause a change in magnetic flux with vibration and deformation, and is made of a material made of a magnetic material that is not a magnetostrictive element.
  • the yoke member 107 is assembled to the second power generation element 105 which is not a magnetostrictive element, and a magnetic circuit parallel to the first power generation element 104 is configured. Also, a permanent magnet 108 is provided as magnet means for applying a bias magnetic flux to such a magnetic circuit.
  • the yoke members 107 extend in parallel to the sides of the first power generation element 104 and the second power generation element 105.
  • the yoke member 107 has a longitudinal shape extending across the attachment side member 102 and the end side member 103, and is disposed laterally with respect to the first power generation element 104 and the second power generation element 105. It is placed apart.
  • one end in the lengthwise direction of the yoke member 107 is magnetically attached to the end on the mounting side member 102 side of the first power generation element 104 and the second power generation element 105 via the permanent magnet 108. It is connected to the.
  • the other end in the lengthwise direction of the yoke member 107 is magnetically connected to the end on the end member 103 side of the first power generation element 104 and the second power generation element 105 via the connection yoke 109. It is connected to the.
  • a closed magnetic circuit is formed by the first power generation element 104 and the second power generation element 105, the yoke member 107, the connection yoke 109 and the permanent magnet 108.
  • a magnetic bias is exerted on this magnetic circuit based on the generated magnetic force of the permanent magnet 108, and on this magnetic circuit, the first power generation element 104 and the second power generation element 105 form a parallel magnetic path. doing.
  • the second coil 110 is wound around the second power generation element 105 in an extrapolated state.
  • the second power generation element 105 is not a magnetostrictive element, when vibration is exerted on the vibration power generation apparatus 100, a change in magnetic flux occurs as described above. This change in magnetic flux is converted by the second coil 110 into an electromotive force as electrical energy. Similar to the first coil 106, the electrical energy obtained through the second coil 110 is extracted to the outside.
  • the above-described conventional configuration has the following problems.
  • the magnetic flux generated from the permanent magnet 108 is branched and passed to both the first power generation element 104 and the second power generation element 105. It is known that magnetic circuits can be compared in much the same way as electrical circuits, but where the equivalent of magnetic flux is current. Accordingly, the magnetic flux is branched between the first power generation element 104 and the second power generation element 105.
  • a relational expression of magnetic flux in the inverse magnetostrictive effect there is the following expression 1.
  • each of the magnetic flux B, the magnetic permeability ⁇ , the magnetic field strength H, the magnetostriction constant d, and the stress T From the first term on the right side of the equation (1), it can be seen that the magnetic flux B has a correlation with the magnetic field strength H, that is, the magnetic bias from the permanent magnet 108.
  • H the magnetic field strength from the permanent magnet 108.
  • the magnetic flux B is divided, so the magnetic field strength H in the formula (1) viewed from the first power generation element 104 is Since the voltage drops, the magnetic bias is smaller than when only the first power generation element 104 is present.
  • the effect of inducing the change of the magnetic flux to the second power generation element 105 is also obtained by the change of the magnetic flux of the first power generation element 104, the magnetism originally applied to the first power generation element 104 Since the bias is small, the change in the magnetic flux B of the second power generation element 105 is also small, and as a result, the effect is thin.
  • an object of the present invention is to provide a power generation device using a reverse magnetostrictive effect, in which the generation efficiency is improved by passing all the magnetic biases from the magnet to the magnetostrictive element.
  • a power generating device is used that includes a magnet to be applied to the second magnetostrictive material and a yoke for a magnetic circuit for forming a closed magnetic path between the laminate and the magnet.
  • the power generation efficiency is improved, the power of the device operated by the battery can be supplied, the battery replacement operation becomes unnecessary, and the number of personnel and the cost required for maintenance can be reduced.
  • FIG. 1A is a schematic cross-sectional view of a power generation apparatus according to Embodiment 1 of the present invention.
  • FIG. 1B is a schematic top view of the power generation device according to Embodiment 1 of the present invention.
  • FIG. 1C is a schematic diagram for describing a magnetic circuit of the power generation device according to Embodiment 1 of the present invention.
  • FIG. 2 is a schematic cross-sectional view for explaining the operation at the time of vibration input in the first embodiment of the present invention.
  • FIG. 3 is a schematic view for explaining the cross section of the laminate 4 of the power generation device according to Embodiment 2 of the present invention.
  • FIG. 4A is a cross-sectional view of the vibration power generation device of the first embodiment.
  • FIG. 4B is a cross-sectional view of the vibration power generation device of the third embodiment.
  • FIG. 4C is a cross-sectional view of the diaphragm of the first embodiment.
  • FIG. 4D is a cross-sectional view of the diaphragm of the first embodiment.
  • FIG. 4E is a cross-sectional view of the diaphragm of the third embodiment.
  • FIG. 5A is a schematic cross-sectional view of a power generation device according to Patent Document 1.
  • FIG. 5B is a schematic top view of a power generator according to Patent Document 1.
  • FIG. 5C is a schematic view for explaining a magnetic circuit of the power generation device according to Patent Document 1.
  • FIG. 1A is a schematic cross-sectional view of the power generation device 1 according to Embodiment 1 of the present invention, and is a view showing a cross section along AA ′ of FIG. 1B.
  • FIG. 1B is a schematic top view of the electric power generating apparatus 1 in Embodiment 1 of this invention.
  • a first magnetostrictive material 2 and a second magnetostrictive material 3 are laminated, and a coil 5 is wound around the laminated body 4.
  • the diaphragm 6 is connected to one side of the laminate 4, and a weight 7 is disposed at an end of the diaphragm 6.
  • the connection yoke 8 is connected to the other of the laminate 4, and the connection yoke 8 is attached to the vibration source 9.
  • magnets 10 are respectively disposed on the diaphragm 6 and the connection yoke 8, and the magnet 10 applies a magnetic bias to the laminate 4.
  • a yoke 11 for a magnetic circuit is connected to the magnet 10 in order to form a closed magnetic circuit with respect to the magnetic bias.
  • the first magnetostrictive material 2 and the second magnetostrictive material 3 have a plate-like longitudinal shape, and take the structure of a cantilever as the power generation device 1 as a whole.
  • FIG. 1C is a schematic diagram for explaining a magnetic circuit of the power generation device 1 according to Embodiment 1 of the present invention.
  • a magnetic bias is generated from the connection yoke 8 and the magnet 10 disposed on the diaphragm 6, and the laminated body 4 and the yoke 11 for a magnetic circuit are used as a passage to form a closed magnetic path in which the magnetic flux flows back.
  • the first magnetostrictive material 2 is a material having a positive magnetostriction constant.
  • the positive magnetostriction constant represents the characteristic that the dimension of the material is elongated in the direction of the magnetic flux.
  • Materials having such properties include TbFe 2 (terbium-iron alloy), DyFe 2 (dysprosium-iron alloy), HoFe 2 (holmium-iron alloy), Galfenol (gallium-iron alloy), Terfenol-D (Terbium-dysprosium-iron alloy), FeSiB (iron-silicon-boron amorphous alloy), and the like.
  • the second magnetostrictive material 3 is a material having a negative magnetostriction constant.
  • the negative magnetostriction constant represents the characteristic that the dimension of the material shrinks in the direction of the magnetic flux.
  • Materials having such properties include SmFe 2 (samarium-iron alloy), ErFe 2 (erbium-iron alloy), TmFe 2 (thulium-iron alloy), and the like.
  • Such a first magnetostrictive material 2 and a second magnetostrictive material 3 are laminated to form a laminated body 4, but it only needs to be in contact, and a molten metal such as an adhesive such as epoxy resin or a brazing material It may be adhered by a bonding material according to There is no problem even if the connection yoke 8 and the diaphragm 6 are fastened with a screw or the like.
  • the laminating direction of the first magnetostrictive material 2 and the second magnetostrictive material 3 is the vibrating direction (FIG. 2). That is, the direction perpendicular to the direction in which the diaphragm 6 and the weight 7 are connected.
  • the coil 5 is wound with a space provided around the laminate 4, and the voltage is proportional to the time change of the magnetic flux passing through the first magnetostrictive material 2 and the second magnetostrictive material 3 according to the law of electromagnetic induction.
  • the material of the coil 5 is not particularly limited, for example, a copper wire or an aluminum wire can be used. Further, the magnitude of the voltage and the magnitude of the resistance can be adjusted by changing the number of turns and the wire diameter of the coil 5. Both ends of the winding of the coil 5 are electrically connected to a rectifying device or the like as needed, so that electrical energy obtained by vibration is extracted to the outside.
  • the above-mentioned space between the coil 5 and the laminate 4 is for securing electrical insulation. However, in order to fix the coil 5, it is more reliable for the power generation device 1 to be fixed by an insulating resin or the like. It is preferable to maintain the sex.
  • the diaphragm 6 and the weight 7 are mainly for enabling the power generation device 1 to generate power in accordance with the vibration condition of the vibration source 9.
  • the diaphragm 6 may be a plate-like metal
  • the weight 7 may be a block-like or cylindrical metal.
  • the natural frequency exists in the object, and by resonating with the vibration source 9, the power generation device 1 can be largely vibrated, and the power generation amount is also improved. That is, a structure in accordance with the vibration frequency of the vibration source 9 is preferable.
  • the vibrating plate 6 is preferably a magnetic body in order to pass the magnetism from the viewpoint of suppressing the magnetic bias loss.
  • the material of the weight 7 is not particularly limited, but the size of the weight 7 can be reduced by using a high density material such as tungsten from the viewpoint of miniaturization. Further, since it is not necessary to pass the magnetic flux to the weight 7, it is more preferable that the magnetic permeability be low.
  • connection yoke 8 is for transmitting vibration between the laminate 4 and the vibration source 9. Further, as in the case of the diaphragm 6, the magnetism passes. Therefore, it is preferable to use a magnetic substance such as iron or nickel. More specifically, plate-like longitudinal magnetic bodies similar to the first magnetostrictive material 2 and the second magnetostrictive material 3 can be used.
  • the magnet 10 is disposed to apply a magnetic bias to the first magnetostrictive material 2 and the second magnetostrictive material 3. As shown in the equation (1), since it is related to the magnetic field strength H, it is preferable to use one having a strong magnetic force. For example, although a neodymium-based permanent magnet can be used, it is not particularly limited, such as ferrite-based or cobalt-based. Further, as shown in FIG. 1B, two magnets 10 are disposed.
  • the magnetic circuit yoke 11 is disposed to return the magnetic flux generated from the magnet 10 to form a closed magnetic path with respect to the laminate 4.
  • a closed magnetic circuit is preferable because the magnetic flux passes through the low reluctance portion, so there is little leakage into air and energy can be used efficiently.
  • magnetic flux passes through the yoke 11 for magnetic circuit, it is preferable that iron, nickel and the like be also magnetic.
  • the magnetic circuit yoke 11 is disposed at a position not overlapping the laminate 4 in the vibration direction. This is because the rigidity of the power generation device 1 is improved when overlapping with the laminate 4 in the vibration direction, the force applied to the first magnetostrictive material 2 and the second magnetostrictive material 3 is reduced, and deformation of the material is less likely to occur. As a result, the amount of power generation is reduced.
  • FIG. 2 is a schematic cross-sectional view for explaining the operation at the time of vibration input in the first embodiment of the present invention, and shows a state when a force is applied downward on the paper.
  • the coil 5 is not shown for convenience.
  • a tensile force works most on the surface of the first magnetostrictive material 2, that is, the upper surface side of the laminated body 4 on the paper surface.
  • a compressive force acts on the back surface of the second magnetostrictive material 3, that is, on the lower surface side of the laminate 4 on the paper surface.
  • the tensile and compressive forces decrease toward the center of the laminate 4 in the thickness direction, and there is an axis at which the force is zero (an axis in which the tensile force and the compressive force are balanced).
  • first magnetostrictive material 2 and the second magnetostrictive material 3 have the same shape and have the same physical properties. However, it is assumed that the magnetostriction constant of the first magnetostrictive material 2 and the second magnetostrictive material 3 is opposite in sign.
  • the neutral axis 20 is present at the interface between the first magnetostrictive material 2 and the second magnetostrictive material 3.
  • an adhesive or the like is used, this is not a limitation.
  • the first magnetostrictive material 2 and the second magnetostrictive material 3 have a thickness of 1 mm and the adhesive layer has a thickness of 100 um or less, for example, It can be ignored.
  • the direction of force changes, such as compression and tension, the direction of magnetic flux also changes.
  • the first magnetostrictive material 2 present on the paper surface above the neutral axis 20 is entirely subjected to a tensile force, and conversely, the second magnetostrictive material 3 present on the paper surface below the neutral axis 20 Will have an overall compressive force.
  • the magnetostriction constant is opposite in polarity
  • the magnetic flux generated by the inverse magnetostrictive effect is in the same direction. Since the magnetic fluxes strengthen each other in the same direction, the sum of the magnetic flux generated from the first magnetostrictive material 2 and the magnetic flux generated from the second magnetostrictive material 3 is added to the coil 5 as a change in magnetic flux. It will be extracted electrically from the law.
  • the first magnetostrictive material 2 and the second magnetostrictive material 3 are configured in parallel as a magnetic circuit, all of the magnetic biases from the magnet 10 are It passes through one magnetostrictive material 2 and a second magnetostrictive material 3. That is, the magnetic bias is efficiently used according to the equation (1), and the vibration energy from the vibration source 9 can be converted into the electrical energy with high efficiency.
  • the physical properties of the first magnetostrictive material 2 and the second magnetostrictive material 3 are assumed to be the same for simplification of the explanation, in fact, since the positive magnetostrictive material and the negative magnetostrictive material have different physical properties, Even with the same shape, the neutral axis 20 does not necessarily exist at the interface. However, the effect of the present invention can be exhibited at any thickness ratio by laminating two types of materials in which the positive and negative magnetostriction constants are reversed as compared to the case where one type of material is used. .
  • Second Embodiment In the second embodiment, a configuration for efficiently extracting power when a magnetostrictive material in which the absolute value of the magnetostriction constant is positive and negative is not the same will be described. Matters not described are the same as in the first embodiment.
  • the width and the length of the first magnetostrictive material 2 and the second magnetostrictive material 3 are described to be the same. This is because basically the larger the size of the magnetostrictive material, the larger the volume for generating the magnetic flux, and hence the power generation amount is also improved. The same applies to the case where a positive magnetostrictive material and a negative magnetostrictive material are laminated. If the vibration direction is the thickness direction, it is not necessary to make a difference between the width and the length of the two types of materials. The same form is assumed to be the same.
  • FIG. 3 is a schematic view showing a cross section of the laminated body 4 when the absolute value of the magnetostriction constant d1 of the first magnetostrictive material 2 is larger than the absolute value of the magnetostriction constant d2 of the second magnetostrictive material 3.
  • the absolute value of the magnetostriction constant d1 is larger than the absolute value of the magnetostriction constant d2
  • Equation 4 is an equation of how to obtain the neutral axis 20 in the case of laminating different materials in material dynamics.
  • E1 Young's modulus (GPa) of the first magnetostrictive material 2
  • E2 Young's modulus (GPa) of second magnetostrictive material 3
  • t1 thickness of first magnetostrictive material 2 (mm)
  • t2 Thickness of second magnetostrictive material 3 (mm)
  • h Position (mm) to the neutral axis 20 of the laminate 4 as viewed from the end face of the second magnetostrictive material 3 From the equation (4), the configuration is the highest in power generation efficiency without occurrence of magnetic flux cancellation when
  • Equation (5) means that the neutral axis 20 is present at the interface between the first magnetostrictive material 2 and the second magnetostrictive material 3. Therefore, only the compressive force or the tensile force is applied to the first magnetostrictive material 2. Only the force opposite to that of the first magnetostrictive material 2 is applied to the second magnetostrictive material 3. For this reason, cancellation of the magnetic flux does not occur, and all the magnetic fluxes are generated in the same direction, and the configuration in which the magnetic flux strengthens most is the equation (5).
  • the position h of the neutral axis 20 may be smaller than the thickness t2 of the second magnetostrictive material 3.
  • the cancellation of the magnetic flux does not occur in the positive magnetostrictive material that greatly contributes to the power generation efficiency.
  • the negative magnetostrictive material exists in the state of crossing the neutral axis 20, and the tensile force and the compressive force are generated in the second magnetostrictive material 3, but the value of the magnetostriction constant d2 is small, so the power generation efficiency The impact on it will be small. If these are expressed by a formula,
  • the configuration in the case where the absolute value of the magnetostriction constant d1 of the positive magnetostrictive material which is the first magnetostrictive material 2 is larger than the absolute value of the negative magnetostriction constant d2 which is the second magnetostrictive material 3 explained.
  • the magnetostriction constant d2 is large, the concept is completely the same, and the effect of the present invention is established by exchanging the positive and negative materials of the relational expression.
  • the third embodiment is a power generation device 40 in which the diaphragm 6 is made of a plurality of materials.
  • FIG. 4B shows a cross-sectional view of a power generation device 40 of the third embodiment.
  • FIG. 4A shows a cross-sectional view of the power generation device 1 of the first embodiment. Matters that are not described are the same as in the first and second embodiments.
  • the magnetic flux 41 generated by the magnet 10 passes through the laminate 4 and the yoke for a magnetic circuit to form a loop.
  • FIG. 4C is a cross-sectional view in the case where the diaphragm 6 is made of a nonmagnetic material
  • FIG. 4D is a cross-sectional view in which the diaphragm 6 is made of a nonmagnetic material.
  • FIG. 4D part of the magnetism goes elsewhere; in FIG. 4C, the magnetism is less likely to pass.
  • the first diaphragm 6a and the second diaphragm 6b are connected in a straight line.
  • the first diaphragm 6a and the second diaphragm 6b are made of different materials.
  • the first diaphragm 6a is made of a magnetic material
  • the second diaphragm 6b is made of a nonmagnetic material.
  • the magnetic flux 41 efficiently passes through the first diaphragm 6a of the magnetic material without waste.
  • the power generation efficiency of the power generation device is enhanced.
  • the first diaphragm 6 a is preferably present immediately above the magnet 10 or more.
  • the first diaphragm 6a may not be a rectangular parallelepiped.
  • the magnet 10 and the laminate 4 may be connected so that the magnetic flux 41 can be passed through.
  • the magnet 10 is one each in FIG. 4A and 4B, it is the same even if there are two magnets 10 like FIG.
  • the power generation device can improve power generation efficiency, and is key in IoT where many usage scenes are assumed in the industrial field, crime prevention / disaster prevention field, social infrastructure field, medical / welfare field, etc. It is particularly useful for application to the component wireless sensor module.

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Abstract

L'invention concerne un dispositif de production d'énergie, le dispositif de production d'énergie comprenant un stratifié d'un premier matériau magnétostrictif ayant une constante de magnétostriction positive et un second matériau magnétostrictif ayant une constante de magnétostriction négative ; une bobine enroulée sur le stratifié ; une fourche de liaison qui relie le stratifié et une source de vibration ; une plaque vibrante reliée à l'autre côté du stratifié auquel la fourche de liaison est reliée ; un poids placé sur la plaque vibrante ; un aimant qui applique un flux magnétique de polarisation au premier matériau magnétostrictif et au second matériau magnétostrictif ; et une fourche de circuit magnétique pour former un circuit magnétique fermé entre le stratifié et l'aimant.
PCT/JP2018/047433 2018-01-19 2018-12-25 Dispositif de production d'énergie Ceased WO2019142612A1 (fr)

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JP2018006832 2018-01-19

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0990065A (ja) * 1995-09-28 1997-04-04 Seiko Epson Corp 発電装置付携帯機器
WO2012157246A1 (fr) * 2011-05-16 2012-11-22 国立大学法人金沢大学 Commutateur de production de courant
JP2014197959A (ja) * 2013-03-29 2014-10-16 株式会社デンソー 発電装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0990065A (ja) * 1995-09-28 1997-04-04 Seiko Epson Corp 発電装置付携帯機器
WO2012157246A1 (fr) * 2011-05-16 2012-11-22 国立大学法人金沢大学 Commutateur de production de courant
JP2014197959A (ja) * 2013-03-29 2014-10-16 株式会社デンソー 発電装置

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