JPH01234074A - Optical power generation system employing solar cell - Google Patents

Abstract

PURPOSE:To generate AC power easily, by rotating a plurality of solar cell panels around a single shaft. CONSTITUTION:An optical generation system employing solar cells comprises solar cell panels 2a, 2b, commutators 3a, 3b and a brush 4. The solar cell panels 2a, 2b have light incident faces and opposite sidefaces arranged back to back, where (+) and (-) sides of the panel. 2a are connected respectively with the commutator 3a and a slip ring 3c while (-) and (+) sides of the panel 2b are connected respectively with the commutator 3b and the slip ring 3c. Both panels 2a, 2b rotate around a single shaft and light is projected onto the solar cell panels 2a, 2b. Output power from the panels 2a, 2b is varied with time and combined to produce an AC power output.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of converting DC output power generated in a solar cell into AC power.

[Conventional technology]

FIG. 6 is a conceptual diagram schematically showing the configuration of a conventional photovoltaic power generation system using solar cells. In the figure, (1) is the incident direction of light, (2) is the solar cell panel, (6) is the power storage device, and (7) is the inverter.

In the figure, when light is incident on the solar cell panel (2), part of the energy of the incident light is converted into electrical energy. The electrical energy generated in the solar panel (2) appears in the form of direct current. This electrical energy is led to a power storage device (6) and stored in the form of chemical energy. The power storage device (6) includes power control circuits such as a backflow prevention circuit and an overcharge prevention circuit. Power storage device (6
), and the electrical energy extracted from it is given in the form of direct current, so in order to supply this electrical energy to general AC loads or to use it in conjunction with commercial power, a power storage device (6) is used. The electrical energy from is converted into AC power via an inverter (7).

[Problem to be solved by the invention]

Since the conventional photovoltaic power generation system using solar cells is configured as described above, it requires an inverter to convert DC power to AC power, which has the problem of causing power loss.

This invention was made to solve the above-mentioned problems, and aims to provide a photovoltaic power generation system using solar cells that can extract solar cell output power as AC power without using an inverter.

[Means to solve the problem]

The photovoltaic power generation system using solar cells according to the invention of Part B generates alternating current power by rotating a plurality of solar cell panels around the same rotation axis.

[Effect]

The photovoltaic power generation system using solar cells in this invention consists of rotating a plurality of solar panels around the same rotation axis, changing the output power of each battery panel over time, and combining these. to obtain AC power output.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure is a conceptual diagram showing the configuration of a photovoltaic system using solar cells. In the figure, (1) is the incident direction of light, (2a
), (2b) is a solar panel, (la).

(3b) is the commutator, (4) is the brush, and (5) is the rotation direction of the solar cell panels (2a) and (2b). Second
The figure is a perspective view to make it easier to understand the entire embodiment shown in FIG. 1, and FIG. 3 shows commutators (la), (3b),
(ac), the brushes (4a), (4b), the rotation direction (5) of the solar cell panels (2a), (2b), and the concept 1Δ showing the relationship between the light incident direction (1).

The solar cell panels (2a) and (2b) are arranged with the surfaces opposite to the respective light incident surfaces facing each other back to back. For example, the electrical connection is such that the + side of the solar panel (2a) is connected to the commutator (3a), the ~ side is connected to the slip ring (3c), and the - side of the solar panel (2b) is connected to the commutator (8b).
Connect the + side to the slip ring (8c). In addition, the solar panels (2a) and (2b) rotate around the same rotation axis, and due to this rotation, the solar panels (2a) and (2b) rotate around the same rotation axis.
At the same time as light begins to enter 2a) and the solar panel (2b) begins to be hidden in the shadow (this time is tl), the brush (4) (or brush in Figs. 2 and 3) (4a)) starts to come into contact with the commutator (3a). Furthermore, solar panels (2a) and (2b)
rotates 180 degrees, the solar panel (2a) begins to be hidden in the shadow, and at the same time as light begins to enter the solar panel (2b) (this time is defined as t2), the brush (4) (
Or in FIGS. 2 and 8, the brush (4a)) begins to come into contact with the commutator (8b). Brush (4b
) is always in contact with the slip ring (3c). As the solar panels (2a) and (2b) rotate, the density of light incident on each solar panel changes sinusoidally, resulting in a change in the brush (4) (or FIGS. 2 and 3). In this case, the output voltage EO appearing between the brushes (4a and 4b) changes as shown in FIG. 4, and can be taken out as alternating current power. In Figure 4, A
The portion shown by is the output from the solar cell panel (2a), and the portion shown by B is the output from the solar cell panel (2b). The common connection part of the solar panels (2a) (2b) connected to the slip ring (8c) is the brush (4b)
It is taken out to the outside through.

In addition, in the above example, the case where two solar battery panels were assembled B was shown, but three sets of this combination were prepared, and each set was arranged shifted by 120 degrees around the rotation axis. A phase alternating current output may also be obtained.

In addition, in order to maintain the rotation of the solar panel, the direction of light incidence, and the timing of contact between the brush and commutator, it is possible to easily change the angle of the brush over time as the sun moves. Sun tracking can be achieved.

A portion of the electric power generated by the solar cells or another energy may be used to rotate the solar panel. Frequency control may also be performed by controlling the number of rotations of the panel. As the panel rotates at high speed,
The panel may be rotated within a vacuum vessel to reduce frictional losses.

〔Effect of the invention〕

As described above, according to the present invention, since a plurality of solar panels are rotated around the same axis, it is possible to obtain a solar power generation system that generates AC output without using an inverter.

[Brief explanation of the drawing]

FIG. 1 is a conceptual diagram showing the configuration of a photovoltaic system using solar cells according to an embodiment of the present invention, and FIGS. 2 and 3 each explain in detail the structure of the embodiment shown in FIG. 1. FIG. 4 is a diagram showing the temporal change in the output voltage of this photovoltaic system, FIG. 5 is a conceptual diagram showing another embodiment of the present invention, and FIG. 6 is a diagram showing the conventional FIG. 1 is a conceptual diagram showing the configuration of a photovoltaic system. In the figure, (1) is the incident direction of light, (2a), (2b), (2c)
, (2d), (2e), (2f) are solar panels, (la), (8b) are commutators, (3c) are slip rings, (4), (4a), (4b)
, (4c) is the brush, and (5) is the rotation direction of the solar panel. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] A photovoltaic power generation system using solar cells that generates alternating current output by rotating multiple solar panels around the same rotation axis.