KR102195849B1 - Energy harvesting apparatus using magnetic field - Google Patents

Abstract

An energy harvesting device that uses a magnetic field that generates electric power by using the vibration energy of a magnet vibrating in a space where a magnetic field is formed and an electromagnetic induction method includes a frame; A magnet portion coupled to the side of the frame; A vibration unit vibrating by an external magnetic field; A core part made of a ferromagnetic material which is rotated clockwise or counterclockwise about a rotation axis by the vibration of the vibration part to contact the magnet part; And a coil wound on the core part, wherein the direction of the magnetic force of the core part magnetized in a state in which it rotates in a clockwise direction in contact with the magnet part is rotated in the counterclockwise direction in a state in which it contacts the magnet part. It is a direction opposite to the magnetic force direction of the magnetized core part.

Description

Energy harvesting device using magnetic field {ENERGY HARVESTING APPARATUS USING MAGNETIC FIELD}

The present invention relates to an energy harvesting device, and more particularly, to an energy harvesting device using a magnetic field and electromagnetic induction.

Recently, various energy production methods have been studied according to the shortage of energy resources. In particular, research on a system for recovering energy discarded in daily life under the concept of energy harvesting has been actively conducted.

Energy harvesting technology refers to a technology that collects energy discarded from daily life such as vibration, light, heat, and electromagnetic waves and converts it into usable electrical energy, and active research is being conducted in a wide variety of fields.

As related prior documents, there are Korean Patent Nos. 10-1648261 and 10-0926186.

The present invention is to provide an energy harvesting device capable of generating electric power in a space in which a magnetic field is formed by using electromagnetic induction.

According to an embodiment of the present invention for achieving the above object, the frame; A magnet portion coupled to the side of the frame; A vibration unit vibrating by an external magnetic field; A core part made of a ferromagnetic material which is rotated clockwise or counterclockwise about a rotation axis by the vibration of the vibration part to contact the magnet part; And a coil wound on the core part, wherein the direction of the magnetic force of the core part magnetized in a state in which it rotates in a clockwise direction in contact with the magnet part is rotated in the counterclockwise direction in a state in which it contacts the magnet part. An energy harvesting device using a magnetic field in a direction opposite to the magnetic force direction of the magnetized core portion is provided.

In addition, according to another embodiment of the present invention for achieving the above object, the frame; A pair of magnets coupled to side surfaces of the frame; A vibration unit vibrating by an external magnetic field; A core part made of a ferromagnetic material which is rotated clockwise or counterclockwise about a rotation axis by the vibration of the vibration part to contact the magnet part; And a coil wound on an outer wall of the inner space of the frame in which the core part is located, wherein the direction of the magnetic force of the ferromagnetic material in a state in which the core part is in contact with the magnet part is rotated in the counterclockwise direction. An energy harvesting device using a magnetic field in a direction opposite to a direction of magnetic force in a state in contact with the magnet portion is provided.

According to the present invention, electric energy can be harvested by using the vibration energy and electromagnetic induction method of a magnet vibrating in a space in which a magnetic field is formed.

1 is a view showing a plan view of an energy harvesting device using a magnetic field according to an embodiment of the present invention.
2 is a view showing a side view of an energy harvesting device using a magnetic field according to an embodiment of the present invention.
3 is a view showing a magnet according to an embodiment of the present invention.
4 is a view showing a core part and a vibration part according to an embodiment of the present invention.
5 and 6 are views for explaining a change in a direction of a magnetic force of a core part according to an embodiment of the present invention.
7 is a view for explaining a change in the direction of magnetic force of the core according to another embodiment of the present invention.

In the present invention, various modifications may be made and various embodiments may be provided, and specific embodiments will be illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to a specific embodiment, it is to be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention. In describing each drawing, similar reference numerals have been used for similar elements.

The present invention relates to an energy harvesting device using electromagnetic induction, and generates electric energy by magnetizing a core portion on which a coil is wound.

At this time, the core portion on which the coil is wound may be rotated to be magnetized by contacting the magnet or the magnetized element, and a force capable of rotating the core portion is provided from an external magnetic field. As an example, since a magnetic field is generated around a power cable through which an AC current flows, and the direction of the magnetic field changes as the flow of the AC current periodically changes, the magnet located in the magnetic field vibrates. The core part is rotated by using a magnet that vibrates in the magnetic field generated by it.

Whenever the rotation direction of the core part is changed, the core part is magnetized so that the direction of the polarity changes, and thus, electric energy may be generated by electromagnetic induction as the core part on which the coil is wound rotates.

The energy harvesting device according to the present invention may be utilized in a space where a magnetic field is formed, such as around a power cable.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view showing a plan view of an energy harvesting device using a magnetic field according to an embodiment of the present invention, Figure 2 is a view showing a side view of the energy harvesting device using a magnetic field according to an embodiment of the present invention. And Figure 3 is a view showing a magnet unit according to an embodiment of the present invention, Figure 4 is a view showing a core portion and a vibration unit according to an embodiment of the present invention.

1 to 3, the energy harvesting apparatus according to the present invention includes a frame 110, a magnet part 120, a core part 130, a vibration part 140, and a coil (not shown).

In the frame 110, the magnet portion 120 and the core portion 130 are coupled, and the coil may be wound directly on the core portion 130 or may be wound on the frame 110 according to an embodiment. And the vibration unit 140 is coupled to the core unit 130.

The magnet unit 120 is coupled to one side of the frame 110 and is coupled to be parallel to the longitudinal direction of the frame 110. And according to the embodiment, a pair of magnet portions may be coupled to one side and the other side of the frame in a symmetrical structure. The magnet part 120 includes a pair of rods 121 and 122 and a permanent magnet 123, and as shown in FIG. 3, may have a shape such as the letter H. The pair of rods 121 and 122 is made of a ferromagnetic material such as iron, nickel, etc. and is arranged to face each other, and the frame 110 so that the protrusion of the core portion 130 is positioned between the pair of rods 121 and 122 Is bound to

The permanent magnet 123 is coupled to the rod between the pair of rods 121 and 122, and magnetizes each rod to a different polarity. For example, the permanent magnet 123 may magnetize the first rod 121 to the N pole and the second rod 122 to the S pole. The length of the permanent magnet 123 is shorter than the length of the pair of rods 121 and 122, and the rod is coupled at the center of the rod so that the core portion can contact the rod.

Depending on the embodiment, the magnet unit 120 may include a permanent magnet having one surface having a first polarity and the other surface having a second polarity.

The core part 130 is made of a ferromagnetic material, and by the vibration of the vibrating part 140, the core part 130 rotates clockwise or counterclockwise about the rotation shaft 150 like a seesaw to contact the magnet part 120. By contacting the magnet part 120 by vibration, the core part 130 may be magnetized.

The magnetic force direction of the core part 130 is magnetized while the core part 130 rotates in a clockwise direction and contacts the magnet part 120, and is magnetized in a state in which it contacts the magnet part 120 by rotating counterclockwise. The magnetic force directions of the core part 130 are opposite to each other.

The core part 130 includes a first plate 131, protrusions 132 and 133, and protrusions 134 to 137.

The protrusions 132 and 133 are formed at a position corresponding to the rotation shaft 160 and are formed on the side surfaces of the first plate 131. A groove 111 to which the protrusions 132 and 133 are coupled is formed in the frame 110 so that the core part 130 can rotate around the protrusions 132 and 133.

The protrusions 134 to 137 protrude from the first plate 131 in a direction perpendicular to the length direction of the first plate 131, and the magnet unit 120 to be in contact with the magnet unit 120 Is placed between a pair of rods. The protrusions include a first protrusion 134 in contact with the first rod 121 of the magnet part magnetized to a first polarity when the core part 130 rotates in a counterclockwise direction, and the core part 130 in a clockwise direction. In the case of rotation, it may include a second protrusion 136 in contact with the second rod 132 of the magnet portion magnetized to the second polarity and spaced apart from the first protrusion 134 in the longitudinal direction of the first plate. .

And, as shown in Figure 4, the core part 130 is a third protrusion 135 formed in a symmetrical structure with the first protrusion 134, a fourth protrusion 137 formed in a symmetrical structure with the second protrusion 136 It may further include. At this time, the third protrusion 135 may contact the first rod magnetized to the first polarity in the magnet portion coupled to the other side of the frame, and the fourth protrusion 157 is a magnet coupled to the other side of the frame. It may contact the second rod magnetized from the negative to the second polarity.

The contact relationship between the protrusions 134 to 137 and the magnet 120 will be described in more detail with reference to FIGS. 5 and 6.

The vibrating part 140 vibrates by an external magnetic field, and may be coupled to one end of the core part 130. When the vibration unit 140 vibrates up and down, the core unit 130 may rotate. When the vibration unit 140 vibrates in an upward direction, the core unit 130 rotates in a clockwise direction, and when the vibration unit 140 vibrates in a downward direction, the core unit 130 rotates in a counterclockwise direction.

The vibration unit 140 includes a second plate 141 and a permanent magnet 142. The second plate 141 is coupled to the core portion 130, and the permanent magnet 142 is coupled to the second plate 141 to vibrate by an external magnetic field formed by a power cable. The permanent magnet 142 may be coupled to one end of the second plate 141 so that the displacement of the permanent magnet 142 due to vibration may be increased. The second plate 141 is vibrated by the vibration of the permanent magnet 142, and the core part 130 may be rotated by the vibration of the second plate 141.

According to an embodiment, the vibrating unit 140 may further include a piezoelectric member 143 positioned on one surface of the second plate 141. The second plate 141 is bent by the vibration of the permanent magnet 142, and the bending of the second plate 141 applies pressure to the piezoelectric material 143, so that electric energy can be generated in the piezoelectric material 143. .

As described above, in the frame 110, a groove 111 is formed, and a core portion in which a coil is wound may be disposed in an inner space of the frame formed by the left and right outer walls 112 and 113.

As an embodiment, a cover covering the inner space in which the core portion 130 in which the coil is not wound is disposed may be attached to the top of the outer walls 112 and 113, and the coil is inside the frame in which the core portion 130 is located. It may be wound to surround the outer walls 112 and 113 of the space. When the coil is directly wound on the core, the coil may be cut off by contacting the frame due to the rotational motion of the core.If the coil is wound on the frame, it is irrelevant to the rotational motion of the core. have.

5 and 6 are views for explaining a change in a direction of a magnetic force of a core part according to an embodiment of the present invention.

5 and 6 are diagrams showing an embodiment in which the magnet portion of FIG. 3 is used, and a permanent magnet is omitted for convenience of description. 5 shows a situation in which the core part rotates counterclockwise, and FIG. 6 shows a situation in which the core part rotates in a clockwise direction.

1, 2, and 5(a), when the vibrating part 140 vibrates in a downward direction 510 and the core part 130 rotates counterclockwise, the first protrusion 134 Is in contact with the first bar 121 and the second protrusion 136 is in contact with the second bar 122.

When the first bar 121 and the second bar 122 are magnetized with different polarities, for example, when the first bar 121 is magnetized to an N pole and the second bar 122 is magnetized to an S pole, The region of the first protrusion 134 is magnetized to the S pole because it contacts the N pole, and the region of the second protrusion 136 is magnetized to the N pole because it contacts the S pole. As a result, the core part 130 may be magnetized so that the polarity appears as shown in FIG. 5(b).

Thereafter, when the vibrating part 140 vibrates in an upward direction 520 and the core part 130 rotates in a clockwise direction, the first protrusion 134 contacts the second rod 122 accordingly, and the second protrusion (136) contacts the first bar (121). Accordingly, the core part 130 may be magnetized to have a polarity opposite to that of FIG. 5(b), as shown in FIG. 6(b).

As described above, according to the present invention, the core portion on which the coil is wound is magnetized due to vibration due to the external magnetic field, and since the polarity of the magnetized core portion changes according to the vibration direction, electric energy may be generated by electromagnetic induction.

7 is a view for explaining a change in the direction of magnetic force of a core part according to another embodiment of the present invention, FIG. 7(a) shows a situation in which the core part is rotated counterclockwise, and FIG. 7(b) is a It represents a situation of a clockwise rotation.

As described above, the magnet unit 120 may be a permanent magnet having one surface having a first polarity and the other surface having a second polarity, and as shown in FIG. 7, one surface may be an N-pole and the other surface may be an S-pole.

As shown in FIG. 7(a), when the vibrating part 140 vibrates in a downward direction and the core part 130 rotates in a clockwise direction, the first protrusion 134 contacts one surface of a permanent magnet having an N-pole, FIG. 5 It can be magnetized with the same polarity as (b).

And, as shown in Figure 7 (b), when the vibration unit 140 vibrates in an upward direction and the core unit 130 rotates clockwise, the second protrusion 136 contacts one surface of the permanent magnet having the N pole, and the core The portion 130 may be magnetized with the same polarity as in FIG. 6(b).

Thus, as described in FIGS. 5 and 6, electric energy may be generated by electromagnetic induction.

As described above, in the present invention, specific matters such as specific components, etc., and limited embodiments and drawings have been described, but this is provided only to help a more general understanding of the present invention, and the present invention is not limited to the above embodiments. , If a person of ordinary skill in the field to which the present invention belongs, various modifications and variations are possible from this description. Therefore, the spirit of the present invention is limited to the described embodiments and should not be defined, and all things that are equivalent or equivalent to the claims as well as the claims to be described later fall within the scope of the spirit of the present invention. .

Claims (10)

frame;
A magnet portion coupled to a side surface of the frame and including a first permanent magnet having one surface having a first polarity and the other surface having a second polarity;
A vibration unit vibrating by an external magnetic field;
A core part made of a ferromagnetic material that contacts the magnet part by rotating clockwise or counterclockwise about a rotation axis by the vibration of the vibration part; And
It includes a coil wound on the core portion,
The vibration unit
A first plate coupled to the core portion; And
A second permanent magnet coupled to the first plate and vibrating by the external magnetic field formed by a power cable through which an alternating current flows,
The core part
A second plate coupled to the vibration unit;
A protrusion formed at a position corresponding to the rotation axis and formed on a side surface of the second plate; And
And a plurality of protrusions protruding from the second plate and contacting the magnet,
The protrusion
A first protrusion contacting one surface of the first permanent magnet when the core part is rotated counterclockwise; And
When the core part is rotated in a clockwise direction, it contacts one surface of the first permanent magnet and includes a second protrusion spaced apart from the first protrusion in a longitudinal direction of the second plate,
The magnetic force direction of the core portion magnetized while rotating in the clockwise direction in contact with the magnet portion,
The direction opposite to the magnetic force direction of the core portion magnetized while rotating in the counterclockwise direction in contact with the magnet portion
Energy harvesting device using a magnetic field.
delete The method of claim 1,
The vibration unit
Piezoelectric material positioned on one surface of the first plate
Energy harvesting device using a magnetic field further comprising. delete delete delete delete delete delete delete

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