KR101711789B1 - Energy Harvesting Device Using Magnetostrictive Material - Google Patents

Energy Harvesting Device Using Magnetostrictive Material Download PDF

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Publication number
KR101711789B1
KR101711789B1 KR1020160031368A KR20160031368A KR101711789B1 KR 101711789 B1 KR101711789 B1 KR 101711789B1 KR 1020160031368 A KR1020160031368 A KR 1020160031368A KR 20160031368 A KR20160031368 A KR 20160031368A KR 101711789 B1 KR101711789 B1 KR 101711789B1
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KR
South Korea
Prior art keywords
permanent magnet
energy
magnetostrictive member
flow line
magnetic field
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KR1020160031368A
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Korean (ko)
Inventor
박영우
유은주
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충남대학교산학협력단
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N11/00—Generators or motors not provided for elsewhere; Alleged perpetua mobilia obtained by electric or magnetic means
    • H02N11/002—Generators
    • H01L41/06—
    • H01L41/125—

Abstract

The energy harvesting apparatus of the present invention is an apparatus for converting an external rotational force into electric energy by using magnetic force and magnetostriction and recycling it as electric power. And an energy conversion unit, wherein the energy conversion unit includes a magnetostrictive member for generating a magnetic field by a volume change caused by a repulsive force; A fixed permanent magnet coupled to one end of the magnetostrictive member and generating a repulsive force by a magnetic force generated in the energy transfer unit; A flow line permanent magnet coupled to a lower end of the magnetostrictive member and making a magnetic field generated according to a volume change of the magnetostrictive member a magnetic field flow line; An electric generator for converting the magnetic field flow line into electric energy to generate electricity; And a transformer fixing table coupled to an upper portion of the other end of the magnetostrictive member to fix the magnetostrictive member and fixed to the flow line permanent magnet, A rotation axis portion including a rotation axis for receiving a rotation force and a central support rod surrounding the rotation axis and rotatably coupled with the rotation axis by rotation of the rotation axis and being polygonal columnar; And a plurality of rotating permanent magnets rotated by the rotation of the rotary shaft and generating a repulsive force with the stationary research magnet and vertically installed at the center of the polygonal outer surface of the center support.
According to the energy harvesting apparatus using the magnetostrictive member of the present invention, since it has higher strain, energy density and Curie temperature and faster response speed than the piezoelectric element, the energy production efficiency is high and flexible. Therefore, even in an unstable environment Because it can be applied, it has a wide range of application and it converts the abandoned rotational kinetic energy into usable energy, so it is possible to produce energy without complicated and large equipment.

Description

[0001] The present invention relates to an energy harvesting device using a magnetostrictive member,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an energy harvesting apparatus for converting an abandoned external rotational force into electric energy by using magnetic force and magnetism to be recycled as electric power, A magnetic field is generated by the repulsive force of the rotating permanent magnet and the fixed permanent magnet due to the external rotational force and the magnetization due to the volume change of the magnetostrictive member due to the repulsive force, To an energy harvesting apparatus using a magnetostrictive member which produces electric energy in an electric generator by making a magnetic field flow line.

Conventional energy harvesting techniques have been studied as sources of energy such as wind, sunlight, heat, and vibration. Recently, many researches using piezoelectric elements have been conducted, which are not affected by external weather such as insufficient solar and thermal energy, This is because the energy density is high.

As such, energy harvesting technology uses surrounding environmental energy. However, in the case of environmental energy due to natural phenomena, it is affected by external factors such as weather, so it changes to external factors such as kinetic energy of human body and road vibration Is a major focus of research on piezoelectric power generation using environmental energy.

The most widely used material in piezoelectric power generation is the piezoelectric device described above, which is simple in structure and convenient in control, and has already been applied in many fields. However, since the piezoelectric device has a low energy density, the efficiency of the energy harvesting device is low and it can be easily broken. Therefore, it is difficult to use the piezoelectric device in an unstable environment There is a problem in that there is a material limit which is difficult to apply in the case of

1. Korean Registered Patent No. 10-1053256 (registered on July 26, 2011) Energy Harvester 2. Korean Unexamined Patent Publication No. 10-2014-0136938 (public date: December 1, 2014) Energy Harvesting System 3. Korean Patent Publication No. 10-2001-0026946 (Disclosure Date: Apr. 06, 2001) Device for generating energy by the magnetic force of a permanent magnet 4. Korean Patent Registration No. 10-1317335 (Date of Registration: October 04, 2013) 5. Korean Registered Patent No. 10-1273491 (registered on June 04, 2013) Micro-magnetostrictive motion by energy harvesting

In order to solve the above problems, a repulsive force is generated between the rotating permanent magnet rotated by the discarded rotational force and the fixed permanent magnet coupled to one end of the magnetostrictive member by the same polarity, The magnetic field generated by the volume change at this time creates the flow line permanent magnet and the magnetic field flow line to make the magnetic field flow line < RTI ID = 0.0 > And an energy harvesting device using the magnetostrictive member having high strain rate, energy density, and Curie temperature and having a fast response speed.

The energy harvesting apparatus of the present invention is an apparatus for converting an external rotational force into electric energy using magnetic force and magnetostriction and recycling it as electric power. The energy harvesting apparatus includes an energy transfer unit for transferring rotational force as magnetic energy, ; And an energy conversion unit that receives the magnetic force energy from the energy transfer unit, converts the magnetic energy into electric energy by using magnetostriction, and converts the electric energy into electric energy for recycling.

Wherein the energy converting unit includes a magnetostrictive member for generating a magnetic field by a repulsive force; A fixed permanent magnet coupled to one end of the magnetostrictive member and generating a repulsive force by a magnetic force generated in the energy transfer unit; A flow line permanent magnet coupled to a lower end of the magnetostrictive member and making a magnetic field generated according to a volume change of the magnetostrictive member a magnetic field flow line; An electric generator for converting the magnetic field flow line into electric energy to generate electricity; And a transducing table fixed to an upper portion of the other end of the magnetostrictive member to fix the magnetostrictive member and to which the flow line permanent magnet is coupled and fixed.

The energy transmission unit is composed of a rotation shaft receiving external rotational force, a rotation axis receiving rotation force, and a center support rod surrounding the rotation axis and rotatably coupled with the rotation axis by rotation of the rotation axis, A rotary shaft portion; And a plurality of rotating permanent magnets rotated by the rotation of the rotary shaft and generating a repulsive force with the stationary research magnet and vertically installed at the center of the polygonal outer surface of the center support.

Wherein the permanent magnet portion has a polarity same as that of the stationary research magnet and generates a repulsive force with the stationary research magnet;

And a rotating permanent magnet supporter fixedly coupling the rotating permanent magnet to the center support and rotating the rotating permanent magnet when the rotating shaft rotates.

The transformer fixture includes an upper fixture fixed to the lower portion of the magnetostrictive member; And a lower fixture fixed to the side of the upper fixture and coupled with the flow line permanent magnet at a lower portion where the upper fixture is installed and not being affected by the movement of the energy transmission portion, The lower fixing table is combined with the magnetostrictive member and the flow line permanent magnet so that their positions are not changed even when the volume of the magnetostrictive member is changed.

The electric generator includes a coil disposed around the magnetic field flow line to induce an electromotive force in the coil.

Wherein the rotating permanent magnet supporting unit comprises: a lower support for supporting a lower portion of the rotating permanent magnet; A left support for supporting the left side of the rotating permanent magnet; And a right side support for supporting the right side of the rotating permanent magnet.

The problems to be solved by the present invention can be solved by the energy harvesting apparatus described above.

According to the energy harvesting apparatus using the magnetostrictive member of the present invention, since it has higher strain, energy density and Curie temperature and faster response speed than the piezoelectric element, the energy production efficiency is high and flexible. Therefore, even in an unstable environment Because it can be applied, it has a wide range of application and it converts the abandoned rotational kinetic energy into usable energy, so it is possible to produce energy without complicated and large equipment.

1 is an overall perspective view of an energy harvesting apparatus using the magnetostrictive member of the present invention.
2 is an overall front view of an energy harvesting apparatus using the magnetostrictive member of the present invention
3 is a perspective view of an energy transfer part according to an energy harvesting apparatus using the magnetostrictive member of the present invention.
4 is a perspective view and a schematic view of a rotating shaft portion according to an energy harvesting apparatus using the magnetostrictive member of the present invention
5 is a perspective view of a rotating permanent magnet unit according to an energy harvesting apparatus using the magnetostrictive member of the present invention.
6 is a perspective view and a schematic view of each rotating permanent magnet unit according to the energy harvesting apparatus using the magnetostrictive member of the present invention.
7 is a perspective view of an energy conversion unit according to an energy harvesting apparatus using the magnetostrictive member of the present invention.
8 is a front view of the energy conversion unit according to the energy harvesting apparatus using the magnetostrictive member of the present invention
Fig. 9 is a diagram showing an example of a volume change of a magnetostrictive member due to a repulsive force according to an energy harvesting apparatus using the magnetostrictive member of the present invention
10 is an explanatory diagram of electric energy generation in which a current flows in a conductor in a magnetic field

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

The term "energy harvesting apparatus using a magnetostrictive member" according to the present invention can be used for the following purposes. The term "energy harvesting apparatus" The present invention is not limited to these embodiments.

Hereinafter, a preferred embodiment of the "energy harvesting apparatus using a magnetostrictive member" according to the present invention will be described in detail.

The following examples are merely illustrative of the present invention and are not intended to limit the scope of the present invention.

FIG. 1 is an overall perspective view of an energy harvesting apparatus using the magnetostrictive member of the present invention, FIG. 2 is an overall front view of an energy harvesting apparatus using the magnetostrictive member of the present invention, and FIG. FIG. 4 is a perspective view and a schematic view of a rotary shaft according to an energy harvesting apparatus using the magnetostrictive member of the present invention. FIG. 5 is a cross- FIG. 6 is a perspective view and a schematic view of a rotating permanent magnet unit according to an energy harvesting apparatus using the magnetostrictive member of the present invention, and FIG. 7 is a cross- FIG. 8 is a perspective view of an energy conversion unit according to an energy harvesting apparatus using the magnetostrictive member of the present invention. FIG. 9 is a view showing an example of a volume change of a magnetostrictive member due to a repulsive force according to an energy harvesting apparatus using the magnetostrictive member of the present invention. Fig.

As shown in FIGS. 1 and 2, the energy harvesting apparatus of the present invention is an apparatus for converting an external rotational force into electric energy using magnetostriction and recycling it as electric power, An energy transfer unit (1) for transferring the energy to the magnetic energy; And an energy conversion unit 2 that receives magnetic force energy from the energy transfer unit 1 and converts it into electric energy by using magnetostriction and converts it into electric energy so as to be recyclable.

The external rotational force corresponds to the rotational kinetic energy that is generated from the outside but is discarded, such as a system with a wheel, such as a stroller or shopping cart.

The energy conversion unit 2 includes a magnetostrictive member 21 for generating a magnetic field by a repulsive force, A fixed permanent magnet (22) coupled to one end of the magnetostrictive member (21) and generating a repulsive force by a magnetic force generated in the energy transfer unit (1); A flow line permanent magnet (23) coupled to the lower end of the magnetostrictive member (21) to make a magnetic field flow line according to the volume change of the magnetostrictive member (21) as a magnetic field flow line; And a transformer fixing table 24 coupled to an upper portion of the other end of the magnetostrictive member 21 to fix the magnetostrictive member 21 and to fix the flow line permanent magnet 23 in a fixed manner, Further, an electric generator for converting the magnetic field flow line into electric energy to generate electricity may be included.

The energy transfer unit 1 includes a rotation axis 111 that receives rotation torque and receives a rotational force and a rotation axis 111 that is coupled to the rotation axis 111 by surrounding the rotation axis 111, A rotary shaft portion 11 constituted by a central support rod 112 which is rotated in the same direction by rotation of the rotary shaft and has a polygonal columnar shape; A plurality of rotating permanent magnet portions 12 rotated by the rotation of the rotary shaft portion 11 and generating a repulsive force with the fixed permanent magnets 22 and vertically installed at the center of the polygonal outer surface of the center support 112, .

The energy harvesting apparatus of the present invention uses magnetostriction in which the outer shape changes when the magnetostrictive member 21 is magnetized or is magnetized when the outer shape changes. In the present invention, magnetostriction is magnetized when the outer shape changes, The rotating permanent magnets 121 of the rotating permanent magnet unit 12 rotated by the first and second permanent magnets 21 and 22 and the fixed permanent magnets 22 coupled to one end of the magnetostrictive member 21 have the same polarity, Since the rotary permanent magnet 121 is fixed to the rotary permanent magnet supporting portion 122, the magnetostrictive member 21 coupled to the distal end of the fixed permanent magnet 22 is in a condition to withstand the repulsive force, 241, so that a difference in height is generated between the upper fixture 241 and the fixed portion due to the repulsive force, and the volume is changed. The magnetic field is created for the flow lines the permanent magnet 23 and the magnetic field flow lines produce electrical energy from the electrical generator in the magnetic field flow lines.

The electric generator may include a coil disposed around the magnetic field flow line to generate electric energy as shown in the electric energy generation description of FIG. 10 in such a manner that an electromotive force is induced in the coil.

The coil is installed so as to pass perpendicularly to the flow line of the magnetic field.

As shown in FIG. 3, the energy transfer unit 1 serves to transmit a rotational force to the energy conversion unit 2 as a magnetic force energy. The energy transfer unit 1 is rotated by receiving an external rotational force, And a center support rod 112 which is connected to the rotation axis 111 and rotates together with the rotation of the rotation axis 111 and which has a polygonal columnar shape, )Wow; A plurality of rotating permanent magnet portions 12 rotated by the rotation of the rotary shaft portion 11 and generating a repulsive force with the fixed permanent magnets 22 and vertically installed at the center of the polygonal outer surface of the center support 112, .

As shown in FIG. 4, the rotary shaft portion 11 is rotatably received by an external rotational force, and includes a rotary shaft 111 for receiving a rotary force, and a rotary shaft 111 surrounding the rotary shaft 111, And a center support 112 which is coupled and rotated together with the rotation of the rotation shaft 111 and has a polygonal columnar shape.

The rotation shaft 111 and the center support 112 must be completely fixed to each other by welding or the like so that slip does not occur during rotation.

The center support 112 should have a polygonal column shape having a diagonal angle equal to the number of the rotating permanent magnet portions 12, and preferably has a quadrangular or hexagonal prism shape.

5, the rotating permanent magnet unit 12 is rotated by the rotation of the rotating shaft unit 11 to generate a repulsive force with the fixed permanent magnet 22, Respectively, and four are provided in the drawing.

As shown in Fig. 6, the rotating permanent magnet unit 12 includes a rotating permanent magnet 121 having the same polarity as the fixed permanent magnet 22 and generating a repulsive force with the fixed permanent magnet 22; And a rotating permanent magnet supporting portion 122 for fixing the rotating permanent magnet 121 to the center support 112 to rotate the rotating permanent magnet 121 when the rotating shaft portion 11 is rotated do.

The rotating permanent magnet supporter 122 includes a lower supporter 1221 for supporting a lower portion of the rotating permanent magnet 121; A left support 1222 for supporting the left side of the rotating permanent magnet 121; And a right support table 1223 for supporting the right side of the rotating permanent magnet 121.

As shown in FIGS. 7 and 8, the energy conversion unit includes a magnetostrictive member 21 for generating a magnetic field by a repulsive force of the energy conversion unit 2; A fixed permanent magnet (22) coupled to one end of the magnetostrictive member (21) and generating a repulsive force by a magnetic force generated in the energy transfer unit (1); A flow line permanent magnet (23) coupled to the lower end of the magnetostrictive member (21) to make a magnetic field flow line according to the volume change of the magnetostrictive member (21) as a magnetic field flow line; A transformer fixing table 24 coupled to an upper portion of the other end of the magnetostrictive member 21 to fix the magnetostrictive member 21 and fixedly coupled with the flow line permanent magnet 23; And an electric generator for converting the magnetic field flow line into electrical energy to generate electricity.

The electric generator includes a coil disposed around the magnetic field flow line, and electromotive force is induced in the coil as described in FIG.

The transformer fixture includes an upper fixture fixed to the lower portion of the magnetostrictive member; And a lower fixture fixed to the side of the upper fixture and coupled to the lower portion of the lower fixture to which the flow line permanent magnet is attached and is not affected by the movement of the energy transmission portion.

The upper fixing bar and the lower fixing bar are combined with each other so that the magnetostrictive member and the flow line permanent magnet do not change in position even when the volume of the magnetostrictive member is changed.

Fig. 9 is a view showing the warping of the magnetostrictive member 21 by a repulsive force. In the present invention, the magnetostrictive magnetization is used when the outer shape is changed, and the rotational permanent magnet 12 of the rotating permanent magnet 12, Since the fixed permanent magnet 22 coupled to one end of the permanent magnet support 121 and the fixed permanent magnet 22 connected to one end of the magnetostrictive member 21 have the same polarity, The magnetostrictive member 21 coupled to the distal end of the fixed permanent magnet 22 is fixed at only one end to the upper fixed base 241. Therefore, A magnetic field generated by the volume change at this time creates a magnetic field flow line with the flow line permanent magnet 23, The electric generator in the long flow line produces electrical energy.

FIG. 10 is a diagram showing how a current is generated in a magnetic field flow line according to the present invention. When a conductor in a magnetic field of N and S poles is moved upward, a direction in which a current flows forward is an electromotive force. This is due to the "prime right-hand rule". That is, if the forefinger, thumb, and stop of the right hand are opened at right angles and the forefinger is in the direction of magnetic flux, and the thumb is in the direction in which the conductor is moving, the direction indicated by the stop is the direction of the electromotive force. When a conductor cuts a magnetic flux, a phenomenon that an electromotive force is generated in a conductor and a current flows is referred to as an electromagnetic induction.

According to the energy harvesting apparatus using the magnetostrictive member of the present invention, since it has higher strain, energy density and Curie temperature and faster response speed than the piezoelectric element, the energy production efficiency is high and flexible. Therefore, even in an unstable environment Because it can be applied, it has a wide range of application and it converts the abandoned rotational kinetic energy into usable energy, so it is possible to produce energy without complicated and large equipment.

1: energy transfer part 11: rotary shaft part
111: rotation axis 112: center support
12: rotating permanent magnet section 121: rotating permanent magnet
122: rotating permanent magnet supporter 1221: lower support
1222: Left support rod 1223: Right support rod
2: energy conversion unit 21: magnetostrictive member
22: fixed permanent magnet 23: flow line permanent magnet
24: conversion section fixing table 241: upper fixing table
242:

Claims (5)

1. An energy harvesting apparatus for converting an external rotational force into electric energy by using a magnetic force and a magnetism to be recycled as electric power,
The energy harvesting apparatus includes an energy transfer unit (1) for transferring rotational force as magnetic energy;
And an energy conversion unit (2) that receives magnetic force energy from the energy transfer unit (1), converts the magnetic energy into electric energy by using magnetostriction, and converts it into electric energy so as to be recyclable.
The energy conversion unit 2 includes a magnetostrictive member 21 for generating a magnetic field by a repulsive force,
A fixed permanent magnet (22) coupled to one end of the magnetostrictive member (21) and generating a repulsive force by a magnetic force generated in the energy transfer unit (1);
A flow line permanent magnet (23) coupled to the lower end of the magnetostrictive member (21) to make a magnetic field flow line according to the volume change of the magnetostrictive member (21) as a magnetic field flow line;
And a transformer fixing table 24 coupled to an upper portion of the other end of the magnetostrictive member 21 to fix the magnetostrictive member 21 and to fix the flow line permanent magnet 23 in a fixed manner,
The energy transfer unit 1 includes a rotation axis 111 that receives rotation torque and receives a rotational force and a rotatable shaft 111 that is coupled to the rotation axis 111 by surrounding the rotation axis 111, A rotary shaft portion 11 constituted by a central support rod 112 which is rotated in the same direction by rotation of the rotary shaft and has a polygonal columnar shape;
A plurality of rotating permanent magnet portions 12 rotated by the rotation of the rotary shaft portion 11 and generating a repulsive force with the fixed permanent magnets 22 and vertically installed at the center of the polygonal outer surface of the center support 112, ≪ / RTI >
The rotating permanent magnet unit 12 includes a rotating permanent magnet 121 having the same polarity as the fixed permanent magnet 22 and generating a repulsive force with the fixed permanent magnet 22;
And a rotating permanent magnet supporting portion 122 for fixing the rotating permanent magnet 121 to the center support 112 to rotate the rotating permanent magnet 121 when the rotating shaft portion 11 is rotated And,
The transformer fixture includes an upper fixture fixed to the lower portion of the magnetostrictive member;
And a lower fixture fixed to the side of the upper fixture and coupled to the lower portion of the lower fixture to which the flow line permanent magnet is attached and is not affected by the movement of the energy transmission portion,
The upper and lower fixing rods are coupled to the magnetostrictive member and the flow line permanent magnets so that their positions are not changed even when the volume of the magnetostrictive member is changed,
The energy conversion unit (2) further comprises an electric generator for converting the magnetic field flow line into electric energy to generate electricity,
Wherein the electric generator includes a coil disposed around the magnetic field flow line to induce an electromotive force in the coil,
The rotating permanent magnet supporter 122 includes a lower supporter 1221 for supporting a lower portion of the rotating permanent magnet 121;
A left support 1222 for supporting the left side of the rotating permanent magnet 121;
And a right support table 1223 for supporting the right side of the rotating permanent magnet 121,
Since the rotating permanent magnet 121 of the rotating permanent magnet portion 12 and the fixed permanent magnet 22 coupled to one end of the magnetostrictive member 21 are rotated in the same direction Since the rotating permanent magnet 121 is fixed to the rotating permanent magnet supporting portion 122, the repulsive force to push the fixed permanent magnet 121 to the rotating permanent magnet supporting portion 122 is maintained, Since the member 21 is fixed at only one end to the upper fixing table 241, a difference in height is generated between the upper fixing table 241 and the fixed portion due to the repulsive force, and the volume of the member 21 is changed. Generates a magnetic field flow line with the flow line permanent magnet (23) to produce electrical energy in an electric generator in the magnetic field flow line,
Wherein the center support member (112) is a polygonal columnar member having a diagonal angle equal to the number of the rotating permanent magnet members (12), and has a quadrangular or hexagonal columnar shape. The energy harvesting apparatus
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Cited By (5)

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CN108347196A (en) * 2018-04-26 2018-07-31 南京信息工程大学 A kind of vibrational energy acquisition system based on magnetic electric compound material
CN108448930A (en) * 2018-03-02 2018-08-24 武汉理工大学 Rail vibration energy collection device
WO2018236061A1 (en) * 2017-06-21 2018-12-27 주식회사 에이엠씨글로비즈 Non-contact continuous piezoelectric generator using magnetic force
KR20200109225A (en) * 2019-03-12 2020-09-22 이준호 Small motor generator using solar panel
KR20230132075A (en) * 2022-03-08 2023-09-15 한국생산기술연구원 Transmission line safety lighting device and method for controlling the same

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Publication number Priority date Publication date Assignee Title
WO2018236061A1 (en) * 2017-06-21 2018-12-27 주식회사 에이엠씨글로비즈 Non-contact continuous piezoelectric generator using magnetic force
CN108448930A (en) * 2018-03-02 2018-08-24 武汉理工大学 Rail vibration energy collection device
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CN108347196B (en) * 2018-04-26 2023-06-06 南京信息工程大学 Vibration energy collection system based on magnetoelectric composite material
KR20200109225A (en) * 2019-03-12 2020-09-22 이준호 Small motor generator using solar panel
KR102242897B1 (en) 2019-03-12 2021-04-21 이준호 Small motor generator using solar panel
KR20230132075A (en) * 2022-03-08 2023-09-15 한국생산기술연구원 Transmission line safety lighting device and method for controlling the same
KR102618317B1 (en) * 2022-03-08 2023-12-27 한국생산기술연구원 Transmission line safety lighting device and method for controlling the same
KR20240005625A (en) * 2022-03-08 2024-01-12 한국생산기술연구원 Transmission line safety lighting device and method for controlling the same
KR102635130B1 (en) * 2022-03-08 2024-02-08 한국생산기술연구원 Transmission line safety lighting device and method for controlling the same

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