JPH089662A - Electrostatic motor - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an electrostatic motor having a large torque by effectively utilizing energy generated by an electromagnetic wave-electric conversion element. A rotor 2 provided with a plurality of photoelectric conversion elements 21 and 22 that are rotatably provided and electrically divided, and a drive electrode 4 disposed in the vicinity of the rotor 2 are provided, and the photoelectric conversion elements are sequentially arranged. In an electrostatic motor that irradiates electromagnetic waves and rotates the rotor 2 by electrostatic attraction force or repulsive force with the driving electrode 4, electrode plates 5 and 6 are provided coaxially with the rotor 2 and the rotor is provided on each electrode plate. The number of poles 51, 52 and 61, 62 is the same as that of the photoelectric conversion element, and the pole of one electrode plate 5 is the p-type of the photoelectric conversion element and the pole of the other electrode plate 6 is n.
A stator 9 formed of a dielectric material that is connected to a mold and that generates an attractive force or a repulsive force due to the interaction with the electric field of the electrode plates is arranged between the electrode plates, and the torque generated in the electrode plates is superimposed on the torque of the rotor. Let

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrostatic motor using an electromagnetic wave-electric conversion element.

[0002]

2. Description of the Related Art A semiconductor substrate having electromagnetic wave-electric conversion elements (hereinafter referred to as photoelectric conversion elements) such as those used in solar cells formed in a plurality of regions is rotatably supported on the surface of the semiconductor substrate. The electrostatic force applied between the electric field applied to the drive electrodes arranged close to each other and the electric charge generated on the surface of the photoelectric conversion element by irradiating the substrate with electromagnetic waves is used to drive the substrate to rotate. The electric motor is disclosed in Japanese Patent Laid-Open No.
No. 2613373.

As shown in the conceptual diagram of FIG. 4, such an electrostatic motor has a disk-shaped rotor 2 made of a semiconductor element attached to a rotary shaft 1, and the rotor 2 is separated by a separating band 3. Are electrically divided into a plurality of regions 21, 22 ... Each region constitutes a photoelectric conversion semiconductor element in which a p-type semiconductor is formed on the front surface side and an n-type semiconductor is formed on the rear surface side. A drive electrode 4 made of a metal conductor is arranged close to the surface of the rotor 2 so as to match one of the regions, and a negative electric field is applied to the drive electrode 4.

Therefore, when the photoelectric conversion element in the region 21 of the rotor 2 is irradiated with the light 10 from the surface, a positive charge is generated on the p-type surface of the region 21 and an electrostatic attraction force is generated between the photoelectric conversion element and the negative electric field of the drive electrode 4. Occurs, the region 21 of the rotor 2 is suction-driven to the drive electrode 4 side and rotated in the arrow direction. When the region 21 enters the shadow of the drive electrode 4 due to the rotation, the positive charge disappears and the electrostatic attraction with the drive electrode 4 is lost, but the photoelectric conversion element in the next region 22 is irradiated with light to generate positive charge. It can be rotated continuously.

[0005]

However, in such a conventional configuration, not only the p-type element on the surface of the rotor is positively charged by the irradiation of light, but also the n-type element on the back surface is negatively charged at the same time. Therefore, an electrostatic repulsive force is generated between the negative charge and the drive electrode 4, and when combined, the electrostatic attraction force becomes weak and the torque becomes small. That is, the energy generated by the photoelectric conversion elements in each of the regions 21, 22 ... Is not effectively used as torque. An object of the present invention is to provide an electrostatic motor having a large torque by effectively utilizing the energy generated by the photoelectric conversion element.

[0006]

Therefore, according to the present invention, in an electrostatic motor using a photoelectric conversion element, a pair of electrode plates is provided coaxially with the rotor, and each electrode plate has the same number as the photoelectric conversion element of the rotor. The electrodes of one electrode plate are connected to the p-type of the photoelectric conversion element in the corresponding region, and the poles of the other electrode plate are connected to the n-type, respectively, and the electric field of the electrode plate is placed between the electrode plates. A stator made of a dielectric material that generates an attractive force or a repulsive force by the interaction with is arranged.

[0007]

Therefore, the electric energy generated in the photoelectric conversion element by the electromagnetic waves is concentratedly stored as an electric field between the electrode plates, and a torque is generated in the electrode plate by the interaction with the stator made of a dielectric material. By superposing with the torque of the rotor, the energy of the photoelectric conversion element is effectively used.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. Reference numeral 1 is a rotary shaft, 2 is a rotor fixed to the rotary shaft 1, and is composed of a disc-shaped semiconductor substrate made of silicon or the like, and is divided into a plurality of regions 21, 22, ...・ It is divided into, and each area is p
A photoelectric conversion element is configured by the n-junction. Therefore, the photoelectric conversion elements in each of the regions 21, 22 ... Convert the energy of electromagnetic waves such as sunlight into electricity, and induce positive charges on the p-type surface and negative charges on the n-type surface. Reference numeral 4 denotes a drive electrode made of a metal conductor arranged in proximity to the p-type surface of the rotor and applied with a negative electric field. The drive electrode 4 has a shape adapted to the region and also serves as a light shielding plate for blocking input light.

Numerals 5 and 6 are a pair of electrode plates attached to the rotary shaft 1, which are electrically divided into the same number of poles as the area of the rotor 2 by separators 7 and 8, respectively, and the poles 51 and 52 of the electrode plate 5 are divided.・ ・
Is sequentially p-type in the regions 21, 22 ... of the rotor 2,
Similarly, the poles 61, 62 ... Of the electrode plate 6 are electrically conductive bands formed on the n-type of the regions 21, 22 ... Of the rotor 2 on the conductive wire or the rotary shaft by photofabrication such as vapor deposition. Connected to each other. Reference numeral 9 denotes a stator formed of a dielectric material, preferably having a high dielectric constant, such as barium titanate or strontium titanate is used, and the same relational position as the drive electrode 4 is provided between the facing surfaces of the electrode plates 5 and 6. It is located in. Input light 10 is an electromagnetic wave such as sunlight.

When the area 21 on the side of the drive electrode of the rotor 2 thus constructed is irradiated with the input light 10, the area 2 is formed.
The photoelectric conversion element No. 1 produces a positive charge on the p-type surface and a negative charge on the n-type surface. For this reason, an electrostatic attraction force is generated between the positive charge on the p-type surface and the negative electric field of the drive electrode 4 which is close to the positive charge, and the rotor 2 rotates in the arrow direction. When the region 21 enters the shadow of the drive electrode 4 due to the rotation, the electric charge of the photoelectric conversion element in this region disappears and the electrostatic attraction force between the region and the drive electrode 4 also disappears. Of the photoelectric conversion element receives the input light 10, generates positive charges on the p-type surface and negative charges on the n-type surface of the photoelectric conversion element, and causes the rotor 2 to move in the arrow direction by electrostatic attraction between the photoelectric conversion element and the drive electrode 4. Rotate continuously in the direction.

As described above, when the photoelectric conversion element in the area 21 is irradiated with the input light 10, a voltage is generated between the p-type and the n-type of the photoelectric conversion element, and the pole 51 of the electrode plate 5 and the electrode plate. Since the pole 61 of 6 is connected to the p-type and the n-type of the photoelectric conversion element of the region 21, respectively, the charges corresponding to the voltage are poles 51 and
It is stored in 1, and the electric field between them becomes strong. Since the stator 9 made of a dielectric receives an attractive force in the direction of strong electric field,
As a reaction, the electrode plates 5 and 6 receive torque in the direction of the stator and rotate. When the region 21 enters the shadow of the drive electrode 4, the voltage of the poles 51 and 61 disappears, but the electric field between the poles 52 and 62 becomes strong due to the voltage generated in the photoelectric conversion element of the next region 22, and thus the electrode plate. 5 and 6 continuously receive torque in the same direction. Therefore, the rotating shaft 1 rotates with a large torque by superposing the torque generated by the rotor 2 and the torque generated on the electrode plates 5 and 6.

By irradiating the photoelectric conversion element in the region opposite to the drive electrode 4 with the input light 10, the electrostatic motor can be rotated in the opposite direction. In the description of the drawing, the input light 10 is described as being emitted only to the photoelectric conversion element on one side of the drive electrode 4, but when the input light strikes the entire surface of the stator, a light shielding plate is provided to provide the opposite side of the drive electrode 4. Be sure not to irradiate the area.

If a plurality of drive electrodes 4 and a plurality of stators 9 are provided, the torque can be further increased. In this case, each drive electrode 4 and stator 9
The same direction of the suction force is made to irradiate the same side with the driving force and the driving electrodes are arranged at intervals of two or more areas, and the driving electrodes are not arranged on both sides of the irradiated area. There is a need to.

It should be noted that the electrode plates 6 connected to the n-type may be arranged on the rotor 2 side by reversing the mounting positions of the electrode plates 5 and 6, and as shown in FIG. It is also possible to use an n-type surface that does not face the electrode 4 as the electrode plate 6, face the electrode plate 5 connected to p-type, and dispose the stator 9 between the electrode plate 5 and the rotor 2. 11 is a drive electrode 4
And a support frame for the stator 9.

The number of regions is not limited to that shown in the figure, and the shapes of the photoelectric conversion elements, the drive electrodes, the poles and the stator can be changed as appropriate, and if necessary, the photoelectric conversion of the rotor 2 can be performed. The position of the element and the position of the pole of the electrode plate connected to this photoelectric conversion element may be deviated, and in this case, the installation position of the stator 9 may be deviated from the position of the drive electrode 4 in the same manner.

FIG. 3 shows an example in which the rotor 2 and the electrode plates 5 and 6 are formed in a donut shape and a hub 12 is provided between the rotor 2 and the rotary shaft 1 to be attached thereto. The groove 13 is provided, and the conductive wire 14 connects the p-type of each area of the rotor 2 and each pole of the electrode plate 5, and the conductive wire 15 connects the n-type of each area and each pole of the electrode plate 6. Are arranged along the vertical groove 13, respectively. Instead of the vertical groove, a conductive band may be formed on the surface of the hub 12 for connection.

[0017]

INDUSTRIAL APPLICABILITY As described above, the present invention provides an electrostatic motor for rotating a rotor by electrostatic attraction or repulsive force using the photoelectric conversion element, in which the photoelectric conversion element of the rotor is provided coaxially with the rotor. A pair of electrode plates having the same number of poles is provided, and each pole of the electrode plate is electrically connected to the p-type and the n-type of the photoelectric conversion element in the corresponding region, respectively, and the electrode plates facing each other are dielectrically connected. Since the stator formed by the body is placed, the voltage generated in the photoelectric conversion element of the rotor is stored as an electric field between the opposing poles of the electrode plate, and is attracted to the stator by the interaction with the electric field of the electrode plate. Force or repulsive force is generated, and torque can be generated in the electrode plate by the reaction, and electric energy generated in the photoelectric conversion element of the rotor is effectively used, and the torque of the rotor by the drive electrode and the electrode plate Larger with superimposed torque The effect obtained by an electrostatic motor torque.

Further, by providing a plurality of drive electrodes and a plurality of stators, a larger torque can be generated. By using the opposite surface of the rotor that does not face the drive electrode as one of the electrode plates, it is possible to obtain the effects of simplifying the structure and reducing the inertia of the rotating shaft. If the electrode plate is shaped like a donut and a hub is installed between it and the rotating shaft, a vertical groove can be provided on the outer surface of the hub to connect the rotor and the electrode plate and form a conductive band. In this case, the shaft diameter is large and the processing can be easily performed.

[Brief description of drawings]

FIG. 1 is a perspective view conceptually showing an embodiment of the present invention.

FIG. 2 is a side view showing another embodiment.

FIG. 3 is a side sectional view showing still another embodiment.

FIG. 4 is a perspective view showing the concept of a conventional electrostatic motor.

[Explanation of symbols]

 1 Rotation axis 2 Rotor 3 Separation band 4 Driving electrode 5, 6 Electrode plate 7, 8 Separation band 9 Stator 10 Input light 11 Support frame 12 Hub 13 Vertical groove 14, 15 Conductive wire 21, 22 Region 51, 52, 61 , 62 poles

Claims (4)

[Claims] 1. A rotator, which is a rotatably provided semiconductor substrate, has photoelectric conversion elements electrically divided into a plurality of regions, and the photoelectric conversion elements are irradiated with electromagnetic waves to be arranged close to the substrate. In an electrostatic motor that rotates a rotor by electrostatic attraction force or repulsive force generated between the rotor and the drive electrode, a pair of electrode plates having the same number of poles as the rotor region are provided coaxially with the rotor. , Electrically connecting the respective poles of one electrode plate to the p-type of the photoelectric conversion element in the corresponding region and the respective poles of the other electrode plate to the n-type so that the electric field of the electrode plates is connected between the electrode plates. An electrostatic motor characterized in that a stator made of a dielectric material that generates an attractive force or a repulsive force by the interaction of is arranged. 2. The electrostatic motor according to claim 1, further comprising a plurality of the drive electrodes and a stator. 3. The electrostatic motor according to claim 1, wherein the surface of the rotor on the side not facing the drive electrode is used as one electrode plate. 4. A hub is provided on the rotating shaft to attach a rotor and an electrode plate, and a vertical groove is provided on an outer surface of the hub to dispose a conductive wire connecting the rotor and each electrode plate. Alternatively, the electrostatic motor according to the item 3.