KR101421462B1 - Wave power generation apparatus employing linear generator - Google Patents

Abstract

Disclosed is a wave power generation apparatus using a linear generator which is disposed on the side wall of a coastal structure to generate electricity through wave power and power supply source. The wave power generation apparatus includes a water supply pipe whose lower portion is open to introduce waves and reflective waves thereinto, an outside mover which has a coil and moves up and down depending on the waves and reflective waves within the water supply pipe, a control unit sensing the up and down movement of the outside mover to control the power supply source, and an inside mover which has a permanent magnet inducing electric current by crossing with the coil of the outside mover, is provided with power from the power supply source, and moves up and down within the outside mover to correspond to the up and down movement of the outside mover.

Description

TECHNICAL FIELD [0001] The present invention relates to a wave generator using a linear generator,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wave generator using a linear generator, and more particularly, to a wave generator installed on a side wall of a coast structure and using a linear generator to generate electricity from a wave source and a power source.

Generally, new and renewable energy is a combination of new energy such as fuel cell and hydrogen energy, renewable energy such as solar, solar, bio, wind power, and hydro power, and it can be used by converting existing fossil fuel or using sunlight, water, It is the energy that transforms and uses renewable energy including organism and the like. This is becoming more important not only as a future energy source for a sustainable energy supply system, but also due to the depletion of fossil fuels, instability of oil prices, regulatory response of the climate change convention, and environmental problems.

Development of marine energy using marine, one of the precious clean energy resources, has been particularly popular in recent years. In particular, Korea is expected to grow into a rich ocean energy country due to the location characteristics of the peninsula, and if renewable energy using marine is developed by taking advantage of such location characteristics, it is expected to be ranked among the advanced countries in terms of utilization of green environment resources .

Wind power generation, tidal power generation, and wave power generation are examples of new and renewable energy sources using the ocean. Wave power generation is considered in the sea where waves are particularly excellent, and various types of wave power generation devices are being applied. However, the power generation facilities and the auxiliary facilities including the conventional wave power generation device are generally installed separately in the sea. This is because a wave generator must be installed in a place where continuous wave must be generated while having a wave enough to be used for power generation for wave generation. Therefore, it is costly to install a facility for wave power generation in a sea area capable of satisfying these requirements. Particularly, in the case of the coast, it is difficult to meet the above requirement, and it is not the best place to apply the wave generator.

As an example of a conventional wave power generation device, there is Korean Patent Registration No. 10-1145084 (registered May 05, 2012, hereinafter referred to as "Patent Document 1"). Patent Document 1 discloses a wave generator connected to a buoy and inducing a current by vertically moving according to the motion of a buoy. The wave generator includes a permanent magnet moving body that reciprocates primarily in accordance with the motion of the buoy to maximize the amount of generated power, Discloses a wave generator including a plurality of permanent magnet moving bodies connected to each other, and a soft magnetic material interposed between the permanent magnets. However, in the wave generator disclosed in Patent Document 1, when the wave amplitude is to be used in a sea area having a low amplitude (in this specification, the amplitude of wave is defined as 1/2 of the wave height), not only is there a lot of restrictions, It is disadvantageous in terms of cost, and maintenance management is also difficult.

In recent years, efforts have been actively made to generate waves by combining a plurality of power generation devices having small sizes and high efficiency even in relatively shallow shallow waters. From this point of view, it may be considered to install wave power devices on coastal breakwaters, quays, coastal embankments and seawalls, in particular, to prevent coastal erosion or to protect the harbor interior from waves. In order to obtain stable and efficient electric energy by installing a wave generator in such a coastal structure, the resonance effect of the overlapping wave due to the interaction between the wave and the reflected wave coming back after the wave hit the coastal structure It is necessary to be designed with consideration.

On the other hand, Korean Patent Laid-Open No. 10-2009-0040616 (published on Apr. 27, 2009, hereinafter referred to as Patent Document 2) discloses a linear generator system. The linear generator disclosed in Patent Document 2 includes a cylindrical stator and a mover installed to linearly reciprocate the cylindrical stator so that the intake and exhaust actions can be smoothly performed to increase the efficiency of the apparatus. However, if such a linear generator system is applied to a wave generator as it is, the apparatus is complicated in configuration, so that it is not only limited in installation but also difficult to maintain.

Patent Document 1: Korean Patent No. 10-1145084 (registered on May 03, 2012) Patent Document 2: Korean Patent Laid-Open No. 10-2009-0040616 (Published on April 27, 2009)

Accordingly, an object of the present invention is to provide a wave power generator capable of efficiently converting wave energy into electrical energy by using a resonance effect of overlapping wave caused by wave and reflection wave attached to a side surface of a coastal structure .

According to an aspect of the present invention, there is provided a wave generator installed on a sidewall of a coastal structure and generating electricity using a wave power and a power supply source, the wave generator including: a water pipe having a lower portion opened to allow wave and reflected wave to flow therein; An outer mover having a coil and moving up and down in the water pipe depending on the wave and reflection wave; A control unit for sensing the up and down movement of the outer mover to control the power source; And a permanent magnet for linking with the coil of the outer mover to induce a current and being supplied with power from the power source through the actuator and moving up and down in the outer mover in correspondence with the up and down movement of the outer mover And includes an inner mover.

According to one embodiment, the wave generator further comprises a floater for supporting the outer mover at the bottom of the outer mover and floating it on the sea surface, and the control unit senses the amplitude and frequency of the floater.

According to one embodiment, when the outer mover moves upward, the inner mover is controlled by the control unit to move downward, and when the outer mover moves downward, the control unit causes the inner mover to move upwards .

According to one embodiment, when the inner mover reaches the lowest point, the lowermost end of the inner mover is controlled to be higher than the uppermost end of the plotter.

According to one embodiment, the wave power generator further includes a housing unit which connects between the outer mover and the floater, and is formed integrally with the outer mover and the plotter, and moves up and down in the water pipe, Wherein the housing unit, the outer mover, the inner mover, and the water pipe are disposed so as to have a concentric center, and the cylindrical portion of the water pipe is formed in a cylindrical shape, At least one guide groove formed in the longitudinal direction to define a horizontal movement range of the housing unit, the housing unit including at least one protrusion formed in the longitudinal direction to be inserted into the guide groove.

According to one embodiment, the lower portion of the drain pipe is formed to have a larger diameter than the diameter of the cylindrical portion.

According to another aspect of the present invention, there is provided a wave power generator installed in a coastal structure and generating electricity by using a wave power and a power supply source, the wave power generator being formed in a cylindrical shape and being disposed in contact with a side wall of the coast structure, A water pipe whose bottom is opened so as to be able to be opened; A floater located in the water pipe and floating on the sea surface depending on the wave and reflection wave; A housing unit supported by the floater and disposed concentrically with the drain pipe; An outer mover disposed coaxially with the water pipe and integrally formed with the housing unit and moving up and down depending on up and down movement of the floater in the water pipe; A control unit for sensing the up and down movement of the outer mover to control the power source; And a permanent magnet for linking with the coil of the outer mover to induce a current and being disposed concentrically with the outer mover, wherein the power is supplied from the power source through the actuator to the outside of the outer mover, And an inner mover which moves up and down in the mover.

According to one embodiment, the drainage pipe includes at least one guide groove formed in the longitudinal direction so as to define a horizontal movement range of the housing unit, and the housing unit includes at least one And includes projections.

According to one embodiment, the drainage pipe includes at least one protrusion formed in the longitudinal direction to define a horizontal movement range of the housing unit, and the housing unit includes at least one guide groove .

According to another aspect of the present invention, there is provided a wave generator installed on a sidewall of a coast structure for generating electricity, comprising: a first mover which moves up and down depending on wave and reflection wave; A control unit for sensing an up-and-down motion of the first mover to control an external power source; And a second mover that receives power from the external power source and moves up and down in correspondence with the up-and-down movement of the first mover, wherein one of the first mover and the second mover includes a coil, And the other end has a permanent magnet for inducing a current by linking with the coil by up-down movement of the first mover and the second mover.

The present invention provides a wave power generator installed in a coastal structure and generating electric power by using a wave power and a power supply source. By using wave resonance effect generated by the action of a wave and a coast structure, , And the installation cost can be greatly reduced by actively utilizing the structures installed for the purpose of preventing waves and the like.

1 is a sectional view showing a state in which a wave generator using a linear generator is installed on a side wall of a coastal structure according to an embodiment of the present invention.
2 is a front view of the wave power generator of FIG.
3 is a side cross-sectional view showing a linear generator structure of the wave power generator of FIG.
FIGS. 4A and 4B are views showing two examples of cross-sections taken along AA to show a coupling state between a water pipe, a housing unit and an inner mover of a wave generator according to an embodiment of the present invention.
5A and 5B are views for explaining the operation of the wave generator according to an embodiment of the present invention.

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

FIG. 1 is a cross-sectional view showing a state in which a wave generator using a linear generator is installed on a side wall of a coast structure according to an embodiment of the present invention, FIG. 2 is a front view of the wave generator shown in FIG. 1, 4A and 4B are cross-sectional views taken along the line AA in order to show the state of connection between the diverter pipe, the housing unit and the inner mover of the wave generator according to the embodiment of the present invention. FIG. 5 is a diagram illustrating an operation process of a wave generator according to an embodiment of the present invention. Referring to FIG.

1 to 3, a wave generator 100 of the present invention installed on a sidewall of a coastal structure 1 and generating electricity using a wave power and a power supply source 70 comprises a water pipe 10, An outer mover 20, a control unit 30 and an inner mover 40. [ The wave power generator further includes a floater 50 for supporting the outer mover 20 at a lower portion of the outer mover 20 to float on the sea surface WL. The WL is shown as a straight line on the drawings as the sea surface, but it can be a complex waveform by wave and reflection wave. It should also be noted that the distance between the plotter 50 and the inner mover 40 and the scale of each component have been reduced for convenience of explanation.

The drainage pipe (10) is a portion into which seawater flows, and the lower portion (15) of the drainage pipe (10) is opened so that the wave and reflection wave are introduced. So that the wave and the reflection wave are introduced through the opening so that the floater 50 located in the wave tube 10 is affected by the resonance effect of the overlapping wave. Here, the reflection wave means a wave coming back after the wave hits the side wall of the coast structure 1, and the resonance effect of the double wave means a resonance effect due to superposition of wave and reflection wave.

The outer mover 20 moves up and down in the water pipe 10 depending on the wave and the reflection wave. That is, the outer mover 20 moves up and down according to the interaction between the wave and the reflection wave, that is, the resonance effect due to superimposition. The outer mover 20 is provided with a coil 25. The coil 25 is wound on a cylindrical outer mover 20.

The control unit (30) senses the vertical movement of the outer mover (20). The control unit 30 may sense the up-and-down movement of the outer mover 20 directly, but it is also possible for the outer mover 20 to have a cylindrical housing unit 60 When the floater 50 is connected to the lower portion of the housing unit 60, the control unit 30 senses the up-and-down movement of the floater 50 and moves the movement of the outer mover 20 indirectly . In this way, the control unit 30 directly or indirectly senses the up-and-down motion of the outer mover 20 and provides the sensed information to the power source 70 side.

The inner mover 40 receives power from the power source 70 and moves up and down corresponding to the up and down movements of the outer mover 20. And the inner mover 40 is configured to receive the power between the power source 70 and the inner mover 40 by the actuator 75. [ For example, the power source 70 is a direct current motor, and the actuator 75 converts the rotational motion of the direct current motor into a rectilinear motion to move the inner mover 40 up and down. The inner mover 40 is provided with a permanent magnet 45 so as to be able to induce a current by interlinking with the coil 25 of the outer mover 20 when vertically moving in the inner space of the outer mover 20. [

 The information sensed by the control unit 30 may be the up-down motion amplitude and period (or frequency) of the plotter 50. Herein, the up-down motion amplitude means a difference between the maximum height and the minimum height when the floater 50 moves up and down by the interaction of the wave and the reflection wave, , And the frequency is the inverse of its value. The control unit 30 senses this and transmits it to the power supply source 70 side, so that it can be transmitted to the power supply source 70 through the actuator 75 (in other words, when the frequency is high) The inner mover 40 can be controlled. Thus, the inner mover 40 can move up and down in accordance with the movement of the outer mover 20 in real time.

As described above, the wave generator 100 of the present invention takes a movement mechanism in which two mover, that is, the outer mover 20 and the inner mover 40 move up and down by different external forces to increase power generation efficiency. The outer mover 20 moves upward and downward by the interaction of the wave and the reflected wave and the inner mover 40 is moved in the vertical direction by the power source 70 by the upward and downward movement of the outer mover 20 (Arrow a2).

For example, in order to increase power generation efficiency, when the outer mover 20 moves upward, the control unit 30 senses the upward movement of the outer mover 20 and correspondingly moves the inner mover 40 downward On the other hand, when the outer mover 20 moves downward, the control unit 30 senses the downward movement of the outer mover 20 and controls the inner mover 40 to move upward correspondingly thereto. Also, the control unit 30 allows the inner mover 40 to move in the opposite direction corresponding to the up-down movement of the outer mover 20 in real time in consideration of the up / down movement period of the outer mover 20. [ The wave generator 100 according to the present invention, in which the internal mover 40 is actively controlled in response to the external mover 20 in this manner, generates power by fixing one of the conventional external mover and the internal mover Wave power generation apparatus of the present invention.

As mentioned above, the wave generator of the present invention further includes a cylindrical housing unit 60 having a hollow. The housing unit 60 is formed integrally with the outer mover 20 and the floater 50 to connect the outer mover 20 and the floater 50 and is movable in the vertical direction 50 move up and down in the space in the drain pipe 10.

Referring to FIGS. 4A and 4B, the housing unit 60 and 60 'are vertically moved, that is, the upper and lower sections of the housing unit 60 are cylindrically shaped. The housing unit 60, the outer mover 20, the inner mover 40 and the water pipe 10 are arranged concentrically with respect to the axis C as the center.

4A, at least one guide groove 12a (see FIG. 4A) is formed in the longitudinal direction of the housing unit 60 so as to define a horizontal movement range of the housing unit 60, , 12b and 12c (hereinafter collectively referred to as 12) are formed. The housing unit 60 also includes at least one protrusion 62a, 62b, 62c (collectively referred to as 62) formed in the longitudinal direction to be inserted into the guide groove 12. [

On the other hand, as shown in FIG. 4B, at least one protrusion (not shown) formed in the longitudinal direction is formed in the up and down movement section of the housing unit 60 'in the diverter pipe 10' so as to define a horizontal movement range of the housing unit 60 ' (62a ', 62b', 62c ', hereinafter collectively referred to as 62'), and correspondingly, the housing unit 60 ' 12a ', 12b', 12c '(hereinafter collectively referred to as 12') of the guide grooves 12a, 12b. The housing units 60 and 60 'are prevented from being strongly rocked or rotated in the water pipes 10 and 10' through the coupling structure of the housing units 60 and 60 'and the water pipes 10 and 10' Increase power generation efficiency.

In addition, the lower portion of the diverter pipe 10 may be formed to have a diameter larger than that of the upper portion of the cylinder so as to be well affected by the interaction between the wave and the reflected wave as shown in FIG. 2 2, reference numeral 15). Thus, the resonance effect due to the action of the wave and the reflection wave is transmitted to the plotter 50 inside the diverter pipe 10, so that the power can be effectively generated.

Next, referring to FIG. 5, the relationship between the outer mover 20 and the inner mover 40 in the operation of the wave generator will be described below.

5A, when the outer mover 20 moves downward (arrow a4), that is, when the lowest point (for example, the state where the plotter 50 reaches the valley of the overlapping wave) The control unit 30 senses this and controls the power source 70 (see FIG. 1) so that the inner mover 40 moves upward (arrow a3). In this case, in consideration of the linkage between the coil 25 provided on the outer mover 20 and the permanent magnet 45 provided on the inner mover 40, the inner mover 40 is moved in the outer mover 20, It is necessary to prevent upward movement. An outer space S1 is provided between the housing unit 60 and the water pipe 10 so that the outer mover 20 can be easily moved up and down. Therefore, the housing unit 60 and the water pipe 10 are coupled through the projections and the guide grooves, so that the housing unit 60 and the water pipe 10 can freely move up and down while minimizing left and right movements. An inner space S2 is also provided between the housing unit 60 and the inner mover 40 so that the inner mover 40 can move up and down.

5 (b), when the outer mover 20 moves upward (arrow a6), that is, when the highest point (for example, the state where the floater 50 reaches the floor of the overlapping wave) The control unit 30 senses this and controls the power source 70 so that the inner mover 40 moves downward (arrow a5). In this case, the uppermost end of the floater 50 must operate in a lower range than the lowermost end of the inner mover 40. Otherwise, if the inner mover 40 collides with the uppermost end of the floater 50, the inner mover 40 or the floater 50 is damaged or the real time sensing and control by the control unit 30 becomes difficult.

That is, in the wave generator using the linear generator according to the present invention, the first mover, that is, the outer mover 20 moves up and down depending on the wave and reflected wave, and the second mover, that is, the inner mover 40, And receives the power from the power generation unit 70 to induce a current inside the outer mover 40. [ In other words, by controlling the vertical movement of the inner mover 40 in consideration of the up-and-down motion of the outer mover 20, both the outer mover 20 and the inner mover 40 are minimized The power generation efficiency can be further increased.

According to another embodiment of the present invention, a first mover moving upward and downward depending on a wave and a reflected wave is an inner mover, and receives power from a power generating unit serving as an external power source, May be the outer mover. In this case, for example, the outer mover may include a coil, and the inner mover may include a permanent magnet for inducing a current by linking with the coil by up and down movement of the outer mover and the inner mover.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. If you are a knowledgeable person, you will know easily.

10: Drain pipe 20: Outer mover
30: control unit 40: inner mover
50: Plotter 60: Housing unit
70: Power supply

Claims (10)

A wave power generator installed on a side wall of a coast structure and generating electricity using a wave power and a power supply source,
A water pipe whose bottom is opened so that the wave and the reflection wave enter;
An outer mover having a coil and moving up and down in the water pipe depending on the wave and reflection wave;
A control unit for sensing the up and down movement of the outer mover to control the power source;
And a permanent magnet for linking with the coil of the outer mover to induce a current. The power source is provided with power from the power source through an actuator, and the inner mover moves up and down in the outer mover in accordance with the up- Mover; And
And a floater for supporting the outer mover at a lower portion of the outer mover to float on the sea surface,
Wherein the control unit senses the amplitude and frequency of the plotter and, when the outer mover moves upward, the inner mover is controlled by the control unit to move downward, and when the outer mover moves downward, Wherein the inner mover is controlled to move upward. delete delete The apparatus of claim 1, wherein, when the inner mover reaches the lowest point, the lowermost end of the inner mover is higher than the uppermost end of the plotter. The wave generator according to claim 1, further comprising a housing unit which connects between the outer mover and the floater, and is integrally formed with the outer mover and the floater and moves up and down in the water pipe,
Wherein the housing unit, the outer mover, the inner mover, and the water pipe are arranged concentrically, and the housing unit, the outer mover, the inner mover, and the water pipe are concentrically arranged,
Wherein the cylindrical portion of the diverter tube includes at least one guide groove longitudinally defined to define a range of motion of the housing unit in a horizontal direction and the housing unit comprises at least one And a projection of the wave generating device. The wave generator as claimed in claim 5, wherein a lower portion of the water pipe is formed to have a diameter larger than a diameter of the cylindrical portion. A wave power generator installed in a coastal structure and generating electricity by using a wave power and a power supply source,
A water pipe formed in a cylindrical shape and installed in contact with a sidewall of the coast structure to open the lower part so that wave and reflection wave can be introduced;
A floater located in the water pipe and floating on the sea surface depending on the wave and reflection wave;
A housing unit supported by the floater and disposed concentrically with the drain pipe;
An outer mover disposed coaxially with the water pipe and integrally formed with the housing unit and moving up and down depending on up and down movement of the floater in the water pipe;
A control unit for sensing the up and down movement of the outer mover to control the power source; And
And a permanent magnet for linking with the coil of the outer mover to induce a current and being disposed concentrically with the outer mover, wherein the power is supplied from the power source through the actuator to the outer mover, And an inner mover that moves up and down within the waveguide. [8] The apparatus of claim 7, wherein the drain pipe includes at least one guide groove formed in the longitudinal direction to define a horizontal movement range of the housing unit, and the housing unit includes at least one A wave generating device including a projection. [8] The apparatus of claim 7, wherein the drain pipe includes at least one protrusion formed in a longitudinal direction to define a horizontal movement range of the housing unit, wherein the housing unit includes at least one guide groove .
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