JP2012204471A - Photovoltaic generation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a photovoltaic generation device, capable of securely preventing a break of a motive power transmission unit of a tracking device and a panel thereof with an automatically minimized wind receiving area such as a horizontal posture even at a blackout.SOLUTION: A photovoltaic generation device S includes: a photovoltaic generation panel P having a condenser lens unit 1, disposed outside, with a plurality of dome Fresnel lenses (condenser lenses) 2 connected in series in both vertical and horizontal directions; a pole 20 for rotatably supporting the photovoltaic generation panel P along the orbit of the sun in a manner to tilt the photovoltaic generation panel P in the earth axis direction so that the photovoltaic generation panel P can track the sun; and motive power transmission units 22a, 22b, 26, 27 and 31 disposed on the top end portion of the pole 20 and including motors M1, M2 capable of tilting and revolving the photovoltaic generation panel P. When the motors M1, M2 stop at the blackout or due to a failure in an electric system, the photovoltaic generation panel P comes to have the horizontal posture by the tilt thereof along the earth axis direction by the self-weight (W).

Description

  The present invention relates to a solar power generation apparatus that obtains electric power by tracking a sun with a solar power generation panel having a plurality of condenser lenses on the outside in the vertical and horizontal directions.

From a condensing plate having a plurality of condensing lenses for condensing sunlight, a support plate disposed on the back side of the condensing plate, and the sun tracked by the condensing lens on the support plate There has been proposed a concentrating solar power generation device including a plurality of solar cells arranged at positions where light that is collected is received (see, for example, Patent Document 1).
Since the solar power generation device tracks the sun so that the light receiving surface of the condenser lens is always perpendicular to the sunlight, a tracking (turning) motor along the longitude (EW) direction; And a tracking device including a motor for altitude correction (tilting) along the ground axis (NS) direction, and the sun's orbit calculated from the calendar by an attached control unit for tracking in the two directions. Electric control is performed for each motor using the position as a target value.

Further, the control unit of the solar power generation device drives the tracking device including the two motors when the wind speed by the attached anemometer reaches the risk of damage or collapse of the tracking device, and The solar power generation panel composed of the optical lens and the support plate is set in a horizontal posture and the wind receiving area is minimized to prevent the tracking device from being damaged.
However, the retraction work for placing the photovoltaic power generation panel in a horizontal position is performed by the tracking device including the two motors, so it is impossible in the event of a power failure such as a disaster or when an electrical system trouble occurs. It becomes. In addition, when the photovoltaic power generation panel is beaten by a strong wind and swings irregularly, inadvertent torque is transmitted from the power transmission unit on the panel side to the power transmission unit on the motor side in the tracking device. There is a problem that the tracking device itself fails or breaks. Furthermore, when the solar cell panel is inadvertently struck by a strong wind, the panel and a support supporting the panel at the upper end may come into contact with or collide with each other, resulting in damage.

Japanese Patent Laying-Open No. 2005-142373 (pages 1-8, FIGS. 1-5)

  The present invention solves the problems described in the background art, and even when a power failure or trouble occurs in the electrical system, the solar power generation panel composed of the condenser lens and the housing is automatically taken as a horizontal posture or the like to receive the wind. It is an object of the present invention to provide a solar power generation apparatus that can minimize the damage to the power transmission unit of the tracking device and the panel.

Means for Solving the Problems and Effects of the Invention

In order to solve the above-described problems, the present invention has been conceived with the concept that the photovoltaic power generation panel is configured to be in a horizontal posture and maintain the posture by its own weight even during a power failure or the like. .
That is, the solar power generation device of the present invention (Claim 1) includes a solar power generation panel having a plurality of condensing lenses on the outside in the vertical and horizontal directions, and the solar power generation panel so that the solar power generation panel can track the sun. A support column that tilts the photovoltaic panel along the earth's axis and can be swung along the orbit of the sun, and a motor that is disposed at the upper end of the support column and that can tilt and turn the photovoltaic panel. When the motor stops due to a power failure or an electrical system failure, the solar power generation panel tilts along the ground axis direction due to its own weight, resulting in a horizontal posture. It is characterized by.

  According to this, even when the tilting motor stops due to a power failure due to a disaster or the failure of the electrical system, the solar power generation panel is tilted along the earth axis direction by its own weight, so that the installation position is automatically set. It is possible to minimize the wind receiving area of the panel with a horizontal posture parallel to the ground surface. Therefore, damage to the solar power generation panel and the tracking device can be suppressed, and the solar power generation panel can always track the sun, so that stable solar power generation can be guaranteed.

The solar power generation panel is arranged on the back side of one condensing lens unit in which a plurality of condensing lenses are arranged continuously in length and breadth, and a solar cell is provided directly below each condensing lens. And a casing having a bottom surface on which the cells are arranged. The panel may be a single panel, or may be in the form of a panel unit described later in which a plurality of photovoltaic panels are arranged along the length and breadth in the same plane. The condensing lens may be, for example, a dome-shaped Fresnel lens, a convex lens, a spherical lens, or the like, or may be a condensing lens unit in which these same lenses are continuously arranged vertically and horizontally.
The casing is not particularly limited as long as it includes a bottom plate and a side wall standing from the periphery thereof, but is excellent in corrosion resistance and weather resistance in view of the fact that the photovoltaic power generation panel is installed outdoors. A form obtained by bending a plate of stainless steel, aluminum alloy, or titanium alloy, or an injection molded product made of various hard synthetic resins is recommended.
Further, the center of gravity of the photovoltaic power generation panel is determined by the weight of a frame that supports a plurality of the panels or the weight of these weights, and is located in the middle of the frame and the panel along the longitude (east-west) direction. ing.
In addition, when the photovoltaic power generation panel or the panel unit is in a posture parallel to the ground surface at the ground contact position, it is in a horizontal posture on a flat ground surface or an inclined ground surface.

In the present invention, the photovoltaic power generation panel is located at a position below the center of gravity of the panel below the center of gravity so that the center of gravity of the photovoltaic power generation panel is located above the mounting position of the column along the direction of the ground axis. A solar power generation device (Claim 2) is also included, which is attached to the upper end portion of the support column or a weight attached to the upper side along the ground axis of the panel.
According to this, even in the event of a power failure or the like, the photovoltaic power generation panel is automatically placed parallel to the ground surface of the grounding position, the wind receiving area is minimized, and damage to the panel and the tracking device is reliably suppressed. be able to.
In the form of attaching the weight, one weight is attached at a position along the earth axis direction of the photovoltaic power generation panel along the axial direction of the column, or the axis of the column is along the longitude direction in the panel. A plurality of weights may be attached at symmetrical positions around the center.

Furthermore, the present invention includes a power transmission unit that interlocks with the motor and tilts the photovoltaic power generation panel along the ground axis, including a large-diameter portion on both sides and a break-inducing portion having a smaller diameter than the above, Also included is a solar power generation device (Claim 3), in which a transmission shaft is provided in which the breakage inducing portion breaks due to torque generated when the motor is stopped and the panel is tilted by strong wind.
According to this, even if a torque is generated in the power transmission unit due to a movement in which the motor is stopped and the photovoltaic power generation panel is tilted along the ground axis direction by a strong wind, the torque is arranged in the power transmission unit by the torque. The breakage-inducing portion having a small diameter on the transmission shaft is first broken. Therefore, it is possible to reliably prevent the power transmission unit on the motor side and the motor from being inadvertently driven and damaged by the torque.

In the present invention, when the motor is stopped and the photovoltaic power generation panel is tilted along the ground axis direction by its own weight or weight, the condensing lens in the panel is in a horizontal posture. A solar power generation device (Claim 4) is also included, in which a locking means for holding the panel in a horizontal posture is disposed between the back surface having no surface and the upper end portion of the support column.
According to this, in the event of a power failure or the like, the horizontal position of the panel can be maintained by the locking means while automatically placing the photovoltaic power generation panel in a horizontal posture and keeping the wind receiving area to a minimum. And damage to the tracking device can be reliably prevented.

Further, according to the present invention, the locking means includes a bar attached to the back surface side of the photovoltaic power generation panel without the condenser lens in a direction orthogonal to the ground axis, an upper opening attached to the upper portion of the column. The solar power generation device (Claim 5) is also included, which is composed of a holder whose width is variable.
According to this, when the photovoltaic power generation panel is in a horizontal posture, the bar attached to the panel side temporarily expands the width of the opening of the holder and enters the holder. The bar can be restrained by the holder to prevent inadvertent movement of the panel. The bar is preferably a bar having a flat surface in part.

In addition, in the present invention, a panel unit in which a plurality of the photovoltaic power generation panels are arranged in the same plane has a cutout portion along a ground axis direction from a portion supported by an upper end portion of the support column. A solar power generation device (Claim 6) is also included.
According to this, the panel unit composed of a plurality of the photovoltaic power generation panels has a cutout portion along the ground axis direction from the portion supported by the upper end portion of the support column in the panel unit. Even if the panel unit is beaten due to a strong wind, contact and collision between each panel and the column can be reliably prevented.

The front view which shows the solar power generation device of this invention. The side view which shows the said solar power generation device. The partial expanded side view which shows the principal part of the said solar power generation device. The front view which shows the one photovoltaic power generation panel used for the said photovoltaic power generation apparatus. FIG. 5 is a vertical sectional view taken along line XX in FIG. 4. The side view which shows the state before tilting of the said solar power generation device. The side view which shows the state after tilting of the said solar power generation device. Schematic which shows the locking means used for the said solar power generation device. Schematic which shows the behavior of the said locking means. Schematic which shows the behavior of the transmission shaft used for the power transmission part of this solar power generation device.

Hereinafter, modes for carrying out the present invention will be described.
FIG. 1 is a front view showing a solar power generation device S according to the present invention, FIG. 2 is a side view showing the power generation device S, and FIG. 3 is an enlarged side view including a partial cross section showing the main part of the power generation device S. FIG. In FIG. 3, the panel unit PU is shown relatively reduced for drawing.
As shown in FIGS. 1 and 2, the solar power generation device S is supported on a support column 20 erected on a foundation B provided on a horizontal ground surface GL, and in the vicinity of the upper end portion of the support column 20. And a panel unit PU that is composed of an optical solar power generation panel P and can be tilted along the earth axis (NS axis: north-south direction) and turned in the longitude (east-west) direction.
The concentrating solar power generation panel P is, for example, three in the vertical direction and five in the horizontal direction are connected in the same plane (front surface) of the truss-shaped frame 28 as a support body, and the panel unit PU is connected. In the unit PU, a punched portion N is formed in the vicinity of the support column 20 to prevent interference with the support column 20, and has a substantially inverted concave shape when viewed from the front.
Each of the photovoltaic power generation panels P includes a front-side condensing lens unit 1 described later and a casing 5 disposed on the back side thereof.

  As shown in FIGS. 1 to 3, a rectangular parallelepiped tilting rod 25 is provided in the vicinity of the center of the frame 28 on the back side of the panel unit PU. The tilting rod 25 is supported by the upper end surface of the support column 20 through the arcuate wall 25a and the bearing 24 so as to be rotatable along the longitude direction, and by the rotation axis ps penetrating the bearing 24 vertically. It is possible to turn along the latitudinal direction. A worm 27 and a worm wheel 26 that mesh with each other are arranged on the inner side 25 s of the arc wall 25 a located in the tilting rod 25, and the rotation axis PS of the wheel 26 is connected to the panel unit PU via the tilting rod 25. Is supported to be tiltable along the ground axis direction.

As shown in FIG. 3, a horizontal support plate 23 projects from the bearing 24 on the back side, and an electric motor M1 and a speed reducer 22a interlocking with each other are arranged in series on the support plate 23. ing. The speed reducer 22a and the worm 27 are connected by a transmission shaft 31 including a breakage inducing portion described later.
Accordingly, the torque that is driven by the motor M1 and whose rotational speed is reduced by the speed reducer 22a is transmitted to the rotational axis PS of the wheel 26 via the transmission shaft 31, the worm 27, and the worm wheel 26, as shown in FIG. The panel unit PU can be tilted along the ground axis direction as indicated by a solid-line arrow curved vertically. The motor M1, the speed reducer 22a, the transmission shaft 31, the worm 27, and the worm wheel 26 constitute a power transmission unit on the tilting (north-south direction) side of the tracking device.

  Further, as shown in FIG. 3, an electric motor M2 and a speed reducer 22b that are interlocked with each other are disposed orthogonally on the inner side 20s of the upper end portion of the column 20, and the output rotation shaft ps of the speed reducer 22b. Passes through the bearing 24 and is connected to the bottom surface of the tilting rod 25. Therefore, the torque that is driven by the motor M2 and whose rotation speed is reduced by the speed reducer 22b is indicated by the flat solid arrow in FIG. The PU is supported so as to be able to turn along the longitude direction. The motor M2, the speed reducer 22b, and the rotating shaft ps constitute a turning side power transmission unit in the tracking device.

Further, as shown in FIG. 3, a post 35 standing vertically and a holder 36 positioned at the upper end of the post 35 are attached to the tip of the horizontal plate 20d extending from the upper end of the column 20 to the back side. It has been. On the other hand, in the reinforcing frame 28 attached to the back surface of each housing 5 of the panel unit PU, the support frame 29 is provided above the tilting rod 25 and is substantially cylindrical and partly flat. The bar 30 is fixed horizontally. The rod 30 constitutes a locking means together with the holder 36.
3 indicates the center of gravity of the panel unit PU including the tilting rod 25, the frame 28, the cylindrical body 30, and the like. The center of gravity W is a rotation that is the center of rotation in the tilting direction of the unit PU. It is located above the axis PS in the ground axis direction. The center of gravity W may be positioned by attaching a weight (not shown) above the center part of the panel unit PU supported by the support column 20 at the center part on the back surface of the panel unit PU. In any form, the center of gravity W is located in the middle in the left-right (longitude) direction of the panel unit PU.

  In addition, as shown in FIG. 2, the concentrating solar power generation device S includes a solar light tracking device 21 below the support column 20, and an accurate time and signal using a radio wave clock or GPS signal (not shown). The position of the sun is calculated based on preset value information of the positions of S and S (input longitude and latitude), and the condensing lens unit 1 arranged on the front side for each of the concentrating solar power generation panels P is turned into the sun. The tilting motor M1 and the turning motor M2 are driven while being controlled by the control unit so that they are always oriented and always perpendicular to the incident sunlight. I have to. That is, the control for tracking the movement (orbit) of the sun from sunrise to sunset according to the rotation of the earth is performed by the turning motor M2, and the change of the solar altitude according to the revolution of the earth. Control for responding to is performed by the tilting motor M1, and these are used together.

FIG. 4 is a plan view showing one concentrating solar power generation panel P used in the solar power generation device S, and FIG. 5 is a vertical cross section taken along the line XX in FIG. FIG.
As shown in FIGS. 4 and 5, the concentrating solar power generation panel P includes a condensing lens unit 1 in which five dome-shaped Fresnel lenses (condensing lenses) 2 are arranged continuously in a vertical and horizontal manner and in a lattice shape. The four side walls are arranged on the back side (downward) which is the concave side of each lens 2 in the condenser lens unit 1 and are erected from the square bottom plate 6 and the periphery (four sides) of the bottom plate 6 in plan view. And a housing 5 composed of seven.

The condensing lens unit 1 is formed by, for example, injection molding of an acrylic resin having excellent optical characteristics. As shown in FIG. 4, five dome-shaped Fresnel lenses 2 are arranged in a grid pattern in the vertical and horizontal directions. The hem of each lens 2 has a substantially square shape with rounded corners. Among these, the peripheral edge 3 for each dome-shaped Fresnel lens 2 positioned on the outermost side is an end surface that is gently curved upward (front), and the cross section positioned between the side walls 7 of the adjacent housing 5 has an acute angle. The groove g is filled with a waterproof sealant C made of, for example, silicon.
A dome type Fresnel lens provided with a plurality of ring-shaped steps at concentric positions is engraved on the back side of each Fresnel lens 2. Between the four adjacent lenses 2, 2, a substantially cruciform flat surface is located in plan view. Further, the plurality of dome-shaped Fresnel lenses 2 may be disposed on the condenser lens unit 1 at a checkered (staggered) pattern position in a front view.

On the other hand, for example, the casing 5 is formed by bending an aluminum alloy plate and connecting the adjacent side walls 7 and 7 with screws or the like as appropriate across each corner. The upper end surface (upper side) 8 of each side wall 7 is preferably a curved line along the peripheral edge 3 of the lens 2 in a side view in order to prevent dust from staying, but may be a straight line.
As shown in FIG. 5, in the hollow portion 10 on the bottom plate 6 of the housing 5, a seat plate (not shown) and first and second plates formed on the upper surface of the seat plate are located immediately below each dome type Fresnel lens 2. A lead electrode 18, a solar cell 16 positioned in the center of the electrode 18, a pyramid-shaped homogenizer 14 standing on the battery cell 16, and a solar cell disposed on the homogenizer 14 and in the center A power generation module including a light shielding plate (light cover) 12 having a circular through hole h through which light passes is individually disposed.
The homogenizer 14 is made of optical glass whose four inner surfaces are light reflecting surfaces, but may be made of a metal cylinder.

The solar cell 16 has a plurality of types of pn junctions having different absorption wavelength bands, for example, a multi-junction structure in which an upper bonding layer, an intermediate bonding layer, and a bottom bonding layer are sequentially stacked, and the upper bonding The pn junctions individually provided in the layer, the intermediate bonding layer, and the bottom bonding layer are electrically connected in series and have absorption wavelength bands having different center wavelengths. For example, the upper bonding layer absorbs blue light having a wavelength of 300 to 600 nm, the intermediate bonding layer absorbs yellow light having a wavelength of 600 to 1000 nm, and the bottom bonding layer absorbs red light having a wavelength of 1000 to 1800 nm. Among the wavelengths, the absorption wavelength band can be broadened to ensure high photoelectric conversion efficiency.
As indicated by the arrows in FIG. 5, the sunlight that reaches parallel to the upper side (front side) of each dome-shaped Fresnel lens 2 is focused near the through hole h of the light shielding plate 12 by the Fresnel lens (not shown) on the back side. Then, the light passes through the homogenizer 14 while being reflected, and then enters the photovoltaic cell 16. As a result, sunlight (energy) is efficiently converted into electric power. The electric power is transmitted to the power source through a wiring (not shown) connected to the entire housing 5.

  According to the solar power generation device S as described above, the solar orbit between the sunrise and sunset is tracked, and each lens 2 and solar battery cell of the condensing lens unit 1 for each solar power generation panel P. Since the sunlight is always incident on the surface 16 at right angles and condensed, the torque of the motor M2 causes the panel unit PU to move along the longitude direction via the speed reducer 22b, the rotating shaft ps, and the tilting rod 25. Is turning. On the other hand, the torque of the motor M1 is transmitted to the rotation axis PS of the wheel 26 via the transmission shaft 31, the worm 27, and the worm wheel 26, and the panel unit PU is tilted along the earth axis direction to The altitude position of the sun accompanying the revolution is corrected. As a result, it is possible to always perform efficient solar power generation in the solar cells 16 for each solar power generation panel P regardless of the season.

By the way, for example, a strong wind generated when a typhoon or a developing low pressure approaches or passes through the installation position damages the panel unit PU of the solar power generation device S by, for example, carelessly. It is highly probable that it will have an adverse effect.
Therefore, the solar power generation device S always measures the wind speed in the vicinity by an anemometer (not shown), the panel unit PU including a plurality of solar power generation panels P, and the power transmission unit (motors M1, M2,. If the reducer 22a, 22b, transmission shaft 31, worm 27, worm wheel 26, rotation shaft ps) is subjected to strong winds that may cause damage or collapse, the motors M1 and M2 may not be driven or power failure may occur. It is designed to automatically perform the following evacuation operation regardless of failure.

For example, when a power failure occurs due to a storm caused by a typhoon, the power transmission unit on the tilting side including the motor M1, the speed reducer 22a, the transmission shaft 31, the worm 27, and the worm wheel 26 in the tracking device cannot be self-maintained. Become.
At that time, as indicated by the curved dashed-dotted arrow in FIG. 6, the panel unit PU including the frame 28 and the like has the center of gravity W of the panel P about the rotation axis PS of the worm wheel 26 as the rotation center. Tilt while tilting toward the back side of the housing 5. As a result, the panel unit PU is substantially parallel to the horizontal ground surface GL, as shown in FIG. 7, from a vertically long posture capable of photovoltaic power generation as shown in FIG. Automatically shift to the posture.

As shown in FIG. 8, the holder 36 constituting one of the locking means of the present invention includes a substantially semicircular main body 37 having an inner side 37a, a pair of left and right cylindrical portions 38 positioned on both sides of the opening, It is comprised in the inner side 38a of the cylinder part 38 so that sliding is possible, and it is comprised from the left-right paired stopper 39 in which the inclined surface of a front-end | tip protrudes and retracts with the spring 39a.
When the panel unit PU approaches a horizontal posture, as shown in FIG. 8, the rounded surface of the rod 30 compresses the spring 39 a and pushes the inclined surfaces of the pair of left and right stoppers 39 outward to Since the width is increased, the rod 30 tries to enter the inside 37 a of the main body 37. Then, at the same time as the panel unit PU is in the horizontal posture, as shown in FIG. Returned.

As a result, as shown in FIG. 7, the panel unit PU including the bar 30 is held in a horizontal posture and parallel to the ground surface GL, so that it is prevented from being inadvertently beaten or swung by a strong wind. Is done. The locking means comprising the rod 30 and the holder 36 can be released by a separate means.
During this time, the panel unit PU is tilted by about 90 degrees from the vertically long posture to the back side, so that the torque T generated by the rotation shaft PS at the center of rotation is transmitted via the worm wheel 26 and the worm 27. , Are sequentially transmitted to the transmission shaft 31, the speed reducer 22a, and the motor M1 side. Among these, as shown in the upper part of FIG. 9, the transmission shaft 31 includes a pair of left and right joints 33 individually bolted to end portions of the speed reducer 22 a and the worm 27, and a pair of large diameters positioned therebetween. It is comprised from the part 32 and the thin diameter breakage induction part 34 located between them.

Therefore, as shown by the solid arrow in the upper part of FIG. 10, when the torque T is transmitted from the worm 27 side to the large diameter part 32 on the right side, the large diameter part 32 and the large diameter part 32 on the left side The torsional stress generated along the circumferential direction is concentrated on the fracture inducing part 34.
As a result, as shown in the lower part of FIG. 10, the breakage inducing portion 34 breaks 34h, and thereafter, the panel unit PU tilts as described above due to its own weight (W). Moreover, even if the torque T generated during the tilting propagates through the tilting power transmission unit, it is possible to protect complicated drive sources and transmission means such as the speed reducer 22a and the motor M1, and the locking means. In combination with 30, 36, it is possible to safely keep the panel unit PU in a horizontal posture where the wind receiving area is minimized.
The transmission shaft 31 as described above may also be disposed between the rotary shaft ps and the speed reducer 22b in the turning power transmission unit in the tracking device.

In addition, this invention is not limited to the form demonstrated above.
For example, the photovoltaic power generation panel may have a form in which the frame 28 is not provided and the plurality of casings 5 also serve as strength members.
Furthermore, a hydraulic motor may be applied to the tilting or turning drive source.
Further, the torque direction changing means in the tilting power transmission unit uses a pair of bevel gears instead of the worm gear consisting of the worm wheel and the worm, and provides a difference in the number of teeth of the both to combine a reduction function. You may make it give.
Further, the locking means may be constituted by a convex portion having an arrow shape on the panel unit side and a concave portion having a pair of diagonal pieces that are close to each other by spring pressure on both sides of the opening.
Further, the locking means may be constituted by a convex portion having a single arrow shape on the panel unit side and a concave portion having one oblique piece narrowing the opening portion by spring pressure on one side of the opening portion.
In addition, instead of the horizontal ground surface GL, as a form in which the foundation including the base B is provided on the sea surface from the sea, or as a form in which the foundation including the base B is provided on the water surface such as underline or lake Also good.

  According to the solar power generation device of the present invention, even if a power failure or trouble occurs in the electrical system, the solar power generation panel can be automatically set in a horizontal position or the like so that the wind receiving area can be minimized, and the power transmission unit or the above panel Can be reliably prevented.

1 ………………… Condensing lens unit 2 ………………… Domed Fresnel lens (condensing lens)
20 ……………… Posts 22a, 22b… Reduction gear (power transmission part)
26 ……………… Worm wheel (power transmission part)
27 ……………… Worm (power transmission part)
30 ……………… Bar (locking means)
31 ……………… Transmission shaft 32 ……………… Large-diameter portion 34 ……………… Break-inducing portion 36 ……………… Holder (locking means)
S ………………… Solar power generator P ………………… Solar power generation panel PU ……………… Panel unit W ………………… Center of gravity N ………………… Extraction part GL ……………… Ground surface M1, M2 ……… Motor

Claims (6)

A photovoltaic power generation panel having a plurality of condensing lenses on the outside vertically and horizontally;
A column that tilts the solar power generation panel along the earth's axis and allows it to turn along the solar trajectory so that the solar power generation panel can track the sun, and
A power transmission unit that includes a motor that is disposed at an upper end portion of the support column and that can tilt and turn the photovoltaic power generation panel;
When the motor stops due to a power failure or an electrical system failure, the solar power generation panel tilts along the ground axis direction due to its own weight, and becomes a horizontal posture.
A solar power generation device characterized by that. Whether the solar panel is attached to the upper end of the column at a position below the center of gravity of the panel so that the center of gravity of the photovoltaic panel is positioned above the column attachment position along the axis of the ground. Or a weight is attached to the upper side along the ground axis of the panel,
The solar power generation device according to claim 1. The power transmission unit that interlocks with the motor and tilts the photovoltaic power generation panel along the ground axis includes a large-diameter part on both sides and a breakage-inducing part with a smaller diameter than this, the motor is stopped, and a strong wind A transmission shaft that breaks the rupture inducing portion by torque generated when the panel is tilted is arranged.
The solar power generation device according to claim 1 or 2, wherein When the motor is stopped and the photovoltaic panel is tilted along its axis due to its own weight or weight, the back surface of the panel without the condensing lens and the column Locking means for holding the panel in a horizontal posture is disposed between the upper end portion,
The solar power generation device according to any one of claims 1 to 3, wherein The locking means is attached to the back side of the photovoltaic power generation panel without the condensing lens in a direction orthogonal to the ground axis, and attached to the upper part of the support column, and the width of the upward opening is variable. Consisting of a holder,
The solar power generation device according to claim 4, wherein: The panel unit in which the plurality of photovoltaic panels are arranged in the same plane has a cutout portion along the ground axis direction from the portion supported by the upper end portion of the support column.
The solar power generation device according to any one of claims 1 to 5, wherein

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