KR101891888B1 - Generating device - Google Patents

Abstract

According to the present invention, A mover including a rigid body and a first driving portion; And a second driving part spaced apart from the first driving part and disposed to face the first driving part and performing an electromagnetic interaction with each other, wherein the mover and the supporting part are connected and supported by a plurality of elastic parts, An electric power generating device arranged along two or more axes.

Description

{GENERATING DEVICE}

The present invention relates to a power generating apparatus.

Energy harvesting is a power generation technology that harvests everyday abandoned or unused small energy and converts it into usable electrical energy. Because energy harvesting can acquire electrical energy directly from nature, it can be maintained as energy supply stability, security and sustainability, and it is attracting attention as a renewable energy technology.

There are various types of energy harvesting such as physical energy harvesting, light energy harvesting, vibration energy harvesting, thermal energy harvesting, electromagnetic energy harvesting, gravity energy harvesting, and position energy harvesting. Energy harvesting is a method of generating vibration by applying vibration or pressure to a piezoelectric element.

For example, there is a method of attaching a rigid body to a free end of a cantilever coated with a piezoelectric element. When the cantilever is oscillated by one degree of freedom by external vibration, the piezoelectric body generates a tensile force and a compressive force to generate electricity.

The maximum power of vibration energy harvesting is output when resonance occurs due to the matching of the frequency due to the external vibration and the natural frequency of the rigid body.

However, since the conventional vibration energy harvesting apparatus vibrates at a single freedom, there is a problem that the frequency range band where resonance occurs is limited and the amount of output is limited.

In the present invention, a vibration energy harvesting type power generation device capable of vibrating at multiple degrees of freedom to increase the amount of energy output is provided.

A power generation apparatus according to the present invention includes: a support portion; A mover including a rigid body and a first driving portion; And a second driving unit spaced apart from the first driving unit and disposed to face the first driving unit and performing an electromagnetic interaction with each other, wherein the mover and the supporting unit are connected to and supported by a plurality of elastic parts, The part can be arranged along two or more axes.

The plurality of elastic portions may be disposed along two or more axes symmetrical with respect to an imaginary axis passing through the center of gravity of the rigid body.

The elastic modulus of the plurality of elastic portions may be the same.

Wherein the mover further includes a movable shaft formed in a vertical direction, the rigid body is disposed at a center in the vertical direction of the movable shaft, and the first drive unit includes a coil disposed at each of an upper portion and a lower portion of the movable shaft, The second driving unit may include a magnet unit coupled to the support unit and spaced apart from the coil and opposed to the magnet unit.

Wherein the support portion includes an upper fixing bar and a lower fixing bar spaced apart from each other in a vertical direction, and the mover, the first driving portion, and the plurality of elastic portions are positioned between the upper fixing bar and the lower fixing bar, At least two upper elastic portions connecting the upper support member and the rigid body; And at least two lower elastic parts connecting the lower supporting member and the rigid body, wherein the upper elastic part and the lower elastic part are paired and aligned in the axial direction.

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According to the present invention, since the rigid body is elastically supported and supported by the plurality of elastic portions, it is possible to carry out the N-freedom car wash motion. Therefore, the degree of freedom in which the rigid body can vibrate corresponding to the external vibration is increased, and the region of the frequency at which the resonance occurs is widened. As a result, the power generating capacity can be increased.

Furthermore, since the plurality of elastic portions are arranged symmetrically and the elastic moduli are coincident with each other, stable operation can be performed and external vibrations that can not be predicted can be coped with.

1 is a perspective view showing a power generating apparatus of the present invention.
2 is a conceptual diagram of a power generation apparatus of the present invention.

Hereinafter, some embodiments of the present invention will be described with reference to exemplary drawings. In describing the components in the drawings, the same components are denoted by the same reference numerals whenever possible, even if they are displayed on other drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the difference that the embodiments of the present invention are not conclusive.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected, coupled, or connected to the other component, It is to be understood that another element may be "connected "," coupled ", or "connected" between elements. It is to be noted that the "axial direction" used hereinbelow is defined as "vertical direction".

Hereinafter, the structure of a power generation apparatus of the present invention will be described with reference to the drawings. 1 is a perspective view showing a power generating apparatus of the present invention.

The power generation device (1) of the present invention can generate an induction current through electromagnetic induction as a power generation device for energy harvesting. The induction current is generated by electromagnetic induction when the change of the magnetic flux density has a predetermined direction vector according to Lenz's law. In the power generation apparatus 1 of the present invention, electromagnetic induction is generated between the first and second coils 23 and 24 and the first and second magnet units 31 and 32 to generate an induced current. Further, if the first and second coils 23 and 24 are oscillated in multiple degrees of freedom to broaden the resonance frequency band with respect to external vibration (generated by mechanical vibrations of electronic devices such as natural power, cooling and heating equipment, and hydraulic devices) It is possible to achieve an optimum energy harvesting index for the environment. The power generation device 1 of the present invention may include a support portion 10, a mover 20, a second drive portion 30, and an elastic portion 40.

The supporting portion 10 can support the mover 20. The support portion 10 is connected to the mover 20 by the elastic portion 40 to elastically support the mover 20. The support portion 10 may include an upper fixture 11, a lower fixture 12, and four rods connecting the upper fixture 11 and the lower fixture 12. [ The upper fixing table 11 and the lower fixing table 12 are arranged in a plate form and spaced apart from each other in the vertical direction, and four rods are interposed in the spacing space. The four rods connect the corresponding edges between the upper fixing table 11 and the lower fixing table 12. The movable member 20 may be disposed in the center of the space between the upper and lower holding members 11 and 12. A first magnet unit 31, which will be described later, may be fixed to the upper fixing table 11. [ A second magnet unit 32, which will be described later, may be fixed to the lower fixing table 12. [

The movable member 20 may be a movable member that vibrates with many degrees of freedom. The mover 20 can be received inside the support portion 10. The mover 20 is connected to the elastic portion 40 and can be elastically supported by the support portion 10. [ Basically, the mover 20 is elastically supported by the elastic portion 40 and can vibrate up and down when external vibration is generated. The mover 20 is disposed in the middle of three axes formed by the first, second and third upper and lower elastic portions 41a, 42a, 43a, 41b, 42b, 43b described later, So that it can be oscillated in three degrees of freedom.

The rigid body 21 may be disposed in the center of the inner side of the support portion 10. The rigid body 21 can be fixed to the center in the longitudinal direction of the movable shaft 22. In this case, the movable shaft 22 can be arranged to penetrate the center of gravity of the rigid body 21 in the axial direction. By the rigid body 21, the movable shaft 22 can be divided into an upper portion and a lower portion.

The rigid body 21 has a thick block shape and has a vertically cut edge portion. Therefore, the four vertical edges of the rigid body 21 can be formed with inclined portions connecting adjacent sides. The first, second, and third upper elastic portions 41a, 42a, 43a described later may be disposed on the upper surface of the rigid body 21. The first, second and third upper elastic portions 41a, 42a and 43a can connect the upper surface of the rigid body 21 and the lower surface of the upper fixing table 11. [ The first, second and third lower elastic portions 41b, 42b and 43b, which will be described later, may be arranged on the bottom surface of the rigid body 21. The first, second and third lower elastic portions 41b, 42b and 43b can connect the bottom surface of the rigid body 21 and the top surface of the lower fixing table 12. Therefore, the rigid body 21 can be resiliently supported by the elastic portion 40 and can be accommodated inside the support portion 10.

The movable shaft 22 can be disposed at the center of the inner side of the support portion 10. The movable shaft 22 can be formed in the axial direction. The movable shaft 22 may be disposed in the inner space of the support portion 20 such that the longitudinal direction thereof is the axial direction. A rigid body 21 may be disposed at the center of the movable shaft 22. In this case, the movable shaft 22 may be shaped to penetrate the center of gravity of the rigid body 21 in the axial direction. The movable shaft 22 can be divided into an upper portion and a lower portion by the rigid body 21. [ In this case, the upper portion and the lower portion of the movable shaft 22 may be symmetrical to each other. The first coil 23 and the second coil 24 may be fixed to the upper and lower portions of the movable shaft 22, respectively. The movable shaft 22 may be a non-magnetic body so as not to interfere with the magnetic force lines of the first and second magnet portions 31 and 32 described later. The length of the upper portion of the movable shaft 22 may be shorter than the distance between the bottom surface of the upper fixing table 11 and the upper surface of the rigid body 21. [ The length of the lower portion of the movable shaft 22 may be shorter than the distance between the upper surface of the lower fixing table 12 and the lower surface of the rigid body 21. [ As a result, the movable shaft 22 may be in a floating state, and the rigid body 21 and the first and second coils 23 and 24 may also be floated integrally therewith.

The first and second coils 23 and 24 may be disposed on the upper and lower portions of the movable shaft 22, respectively. The first and second coils 23 and 24 may be wound on the upper and lower portions of the movable shaft 22 by known winding coils, respectively. Lead wires (not shown) may be formed on the first and second coils 23 and 24, respectively. The lead wires of the first and second coils 23 and 24 may be connected to an external electric device to supply electric power or be stored in an energy storage system (ESS). The first and second coils 23 and 24 may be disposed opposite to the first and second magnet units 31 and 32 described later. More specifically, the first magnet unit 31 may include two magnet units arranged in a Halbach array and spaced apart from each other. In this case, the first coil 23 may be disposed between the magnet units of the first magnet unit 31. [ The first coil 23 may be disposed between the magnet unit of the first magnet unit 31 and the magnet unit. In addition, the second magnet unit 32 may include two magnet units arranged in a Halbach array and spaced apart from each other. In this case, the second coil 24 may be disposed between the magnet units of the second magnet unit 32. The second coil 24 may be disposed between the magnet units of the second magnet unit 32 and spaced apart from the magnet unit. The first and second coils 23 and 24 are vertically and horizontally supported by the first and second upper and lower elastic portions 41a, 42a, 43a, 41b and 42b , 43b as the axis. In this case, the first and second coils 23 and 24 have an electromagnetic interaction with the first and second magnet units 31 and 32 to change the magnetic flux, An induced current is generated. Therefore, the first and second coils 23 and 24 may be referred to as a "first drive portion ".

The second driving unit 30 may include the first and second magnet units 31 and 32. The second driving unit 30 can perform an electromagnetic interaction with the first and second coils 23 and 24. The second driving unit 30 may be disposed opposite to the first and second coils 23 and 24. The first magnet part (31) can be fixed to the upper fixing table (11). The first magnet unit 31 may include two magnet units arranged in a Halbach array and spaced apart from each other. The magnet unit of the first magnet unit 31 may include a fixed case for fixing the magnet and the magnet. The magnet units of the first magnet unit 31 may be disposed symmetrically with respect to the imaginary extension line of the movable shaft 22 in the front, rear, left, and right (horizontal) directions. The first coil 23 may be disposed in the space of the magnet unit of the first magnet unit 31. And the second magnet part 32 may be fixed to the lower fixing table 12. [ The second magnet unit 32 may include two magnet units arranged in a Halbach array and spaced apart from each other. The magnet unit of the second magnet unit 32 may include a fixed case for fixing the magnet and the magnet. The magnet units of the second magnet unit 32 may be arranged symmetrically with respect to the imaginary extension line of the movable shaft 22 in the front, rear, left and right (horizontal) directions. And the second coil 24 may be disposed in the spacing space of the magnet unit of the second magnet unit 32.

The plurality of elastic portions 40 may be provided. The elastic portion 40 can connect the mover 20 and the support portion 10. Therefore, the mover 20 can be resiliently supported on the supporting portion 10 by the elastic portion 40. [ The elastic portion 40 may be disposed along two or more axes. That is, the plurality of elastic portions 40 may be disposed on two or more different axes. Further, the elastic portion 40 may be disposed along two or more axes symmetrical to each other with respect to a virtual axis passing through the center of gravity of the rigid body 21. [ The plurality of elastic portions 40 may have the same elastic modulus. The elastic portion 40 may include first, second, and third upper and lower elastic portions 41a, 42a, 43a, 41b, 42b, and 43b.

The first upper elastic portion 41a and the first lower elastic portion 41b are paired with each other and the first upper elastic portion 41a is disposed on the upper portion of the movable shaft 22 and the first lower elastic portion 41b May be disposed at a lower portion of the movable shaft 22. In this case, the first upper and lower elastic portions 41a and 41b can be aligned in the axial direction. The first upper elastic portion 41a connects the upper fixing bar 11 to the rigid body 21 and the first lower elastic portion 41b connects the lower fixing bar 12 and the rigid body 21. [ The first upper and lower elastic portions 41a and 41b may be a spring. In this case, the upper end of the first upper elastic part 41a may be fixed to the lower surface of the upper fixing bar 11, and the lower end of the first upper elastic part 41a may be fixed to the upper surface of the rigid body 21. The upper end of the first lower elastic part 41b may be fixed to the lower surface of the rigid body 21 and the lower end of the first lower elastic part 41b may be fixed to the upper surface of the lower fixing table 12.

The second upper elastic portion 42a and the second lower elastic portion 42b are paired with each other. The second upper elastic portion 42a is disposed on the upper portion of the movable shaft 22 and the second lower elastic portion 42b May be disposed at a lower portion of the movable shaft 22. In this case, the second upper and lower elastic portions 42a and 42b can be aligned in the axial direction. The second upper elastic part 42a connects the upper fixing bar 11 to the rigid body 21 and the second lower elastic part 41b connects the lower fixing bar 12 and the rigid body 21. [ The second upper and lower elastic portions 42a and 42b may be springs. In this case, the upper end of the second upper elastic part 42a may be fixed to the lower surface of the upper fixing bar 11, and the lower end of the second upper elastic part 42a may be fixed to the upper surface of the rigid body 21. The upper end of the second lower elastic part 42b may be fixed to the lower surface of the rigid body 21 and the lower end of the second lower elastic part 42b may be fixed to the upper surface of the lower fixing table 12.

The third upper elastic portion 43a and the third lower elastic portion 43b are paired with each other. The third upper elastic portion 43a is disposed on the upper portion of the movable shaft 22 and the third lower elastic portion 43b May be disposed at a lower portion of the movable shaft 22. In this case, the third upper and lower elastic portions 43a and 43b can be aligned in the axial direction. The third upper elastic part 43a connects the upper fixing bar 11 to the rigid body 21 and the third lower elastic part 43b connects the lower fixing bar 12 and the rigid body 21. [ The third upper and lower elastic portions 43a and 43b may be springs. In this case, the upper end of the third upper elastic part 43a may be fixed to the lower surface of the upper fixing table 11, and the lower end of the third upper elastic part 43a may be fixed to the upper surface of the rigid body 21. The upper end of the third lower elastic part 43b may be fixed to the lower surface of the rigid body 21 and the lower end of the third lower elastic part 43b may be fixed to the upper surface of the lower fixing table 12.

The first upper and lower elastic portions 41a and 41b, the second upper and lower elastic portions 42a and 42b and the third upper and lower elastic portions 43a and 43b may be disposed along different axes. The first upper and lower elastic portions 41a and 41b, the second upper and lower elastic portions 42a and 42b and the third upper and lower elastic portions 43a and 43b are symmetrical with respect to a virtual axis passing through the center of gravity of the rigid body 21 Can be arranged along three axes.

In this case, the first upper and lower elastic portions 41a and 41b and the second upper and lower elastic portions 42a and 42b may be disposed along an axis that is symmetrical about an imaginary axis passing through the center of gravity of the rigid body 21. The first upper and lower elastic portions 41a and 41b and the third upper and lower elastic portions 43a and 43b may be disposed along an axis symmetrical to the left and right with respect to a virtual axis passing through the center of gravity of the rigid body 21. [ The second upper and lower elastic portions 42a and 42b and the third upper and lower elastic portions 43a and 43b may be disposed along an axis that is symmetrical about the imaginary axis passing through the center of gravity of the rigid body 21.

Hereinafter, the operation and effect of the power generation apparatus of the present invention will be described with reference to the drawings. Fig. 2 is a conceptual view showing a horizontal section in which the power generation device of the present invention vibrates and rotates. Fig.

The power generating apparatus 1 of the present invention includes first and second upper and lower elastic portions 41a and 41b disposed along three axes, second upper and lower elastic portions 42a and 42b, and third upper and lower elastic portions 43a and 43b . The first upper and lower elastic portions 41a and 41b and the second upper and lower elastic portions 42a and 42b may be disposed along an axis that is symmetrical about an imaginary axis passing through the center of gravity of the rigid body 21 in forward and backward directions. The first upper and lower elastic portions 41a and 41b and the third upper and lower elastic portions 43a and 43b may be disposed along an axis symmetrical to the left and right with respect to a virtual axis passing through the center of gravity of the rigid body 21. [ The second upper and lower elastic portions 42a and 42b and the third upper and lower elastic portions 43a and 43b may be disposed along an axis that is symmetrical about the imaginary axis passing through the center of gravity of the rigid body 21. Further, the first, second and third upper and lower elastic members 41a, 42a, 43a, 41b, 42b and 43b may have the same elastic modulus as the six spring members.

Therefore, as shown in FIG. 2, the rigid body 21 can rotate about three different straight lines located on one plane, and can perform three degrees of freedom vibration. For example, the power generation device 1 of the present invention can rotate and vibrate based on the first oscillation axis A, the second oscillation axis B, and the third oscillation axis C. In this case, the first oscillation axis A, the second oscillation axis B, and the third oscillation axis C can be located on one plane. As a result, the power generation device 1 of the present invention has three peaks through resonance with the natural frequency in response to the external vibration, so that electricity can be efficiently produced.

The three-degree-of-freedom configuration described above is only the first embodiment of the present invention, and the scope of rights of the present invention is not limited thereto. The present invention can be modified in the arrangement of the elastic portion 40 as a multi-degree of freedom wide band power generator.

In the above-described first embodiment, the elastic portions 40 are disposed along three different axes, but they may be arranged along N axes according to design conditions and have N degrees of freedom. It is noted that the number and arrangement of the shafts on which the elastic portions 40 are disposed may be varied according to design conditions (desired frequency bands) if the condition that the shafts on which the elastic portions 40 are disposed is arranged symmetrically with respect to a virtual axis passing through the center of gravity of the rigid body 21 shall.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. That is, within the scope of the present invention, all of the components may be selectively coupled to one or more of them. Furthermore, the terms "comprises", "comprising", or "having" described above mean that a component can be implanted unless otherwise specifically stated, But should be construed as including other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

1: generator
10: support part 20: movable part
30: second driving part 40: elastic part

Claims (6)

An upper fixing table and a lower fixing table in which rectangular surfaces are arranged in parallel with each other;
Four rods disposed perpendicularly to the vertices of the upper fixture and the lower fixture and connecting the upper fixture and the lower fixture;
A rigid body disposed in a space between the upper fixing table and the lower fixing table;
A shaft passing through the center of gravity of the rigid body and having opposite ends separated from the upper fixing table or the lower fixing table, respectively;
A first coil positioned above the shaft;
A second coil positioned below the shaft;
A first magnet unit disposed on a lower surface of the upper fixture so as to sandwich the first coil;
A second magnet disposed on an upper surface of the lower fixing table so as to sandwich the second coil;
An upper elastic part connecting the rigid body and the upper fixing bar; And
And a lower elastic part connecting the rigid body and the lower fixing table,
Wherein the upper elastic portion includes a first upper elastic portion, a second upper elastic portion, and a third upper elastic portion,
Wherein the lower elastic portion includes a first lower elastic portion disposed in alignment with the first upper elastic portion in the axial direction, a second lower elastic portion disposed in alignment with the second upper elastic portion in the axial direction, 3 upper elastic portion and a third lower elastic portion arranged in alignment in the axial direction,
The elastic modulus of the first to third upper elastic portions and the first to third lower elastic portions are the same,
Wherein the rigid body is capable of rotational vibration based on three lines positioned on one plane by the upper elastic portion and the lower elastic portion.
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