JP2020110019A - Electrostatic force application equipment for charging charge carrier in closely contact charge method - Google Patents

Abstract

To solve the problem that, in a field drive type electrostatic generator which injects an electric charge into a charge carrier having a longitudinally asymmetric shape in an electric field direction by electrostatic induction and carries the injected charge up to a high potential by a longitudinally asymmetric electrostatic force acting upon the charge carrier, a carried charge amount is less and output thereof is small.SOLUTION: A field drive type electrostatic generator in which an insulator having a fixed charge closely contacts a charge carrier that is a conductor and the charge carrier is grounded and, in that case, the charge carrier is charged by a charge statically induced to the charge carrier.EFFECT: A carried charge amount and output of the generator are substantially increased.SELECTED DRAWING: Figure 8

Description

TECHNICAL FIELD The present invention relates to a method for charging a charge carrier of an electric field drive type electrostatic power generation application device which uses an asymmetric electrostatic force in the front-rear direction as a driving force.

As is widely known, a generator has a turbine structure that rotates a coil placed in a magnetic field. That is, by rotating, the number of magnetic force lines that penetrate the coil changes, and an electromotive force is generated.
As the mechanical force for rotating the coil, hydraulic power (waterfall) has been used since the latter half of the 19th century, but in recent years, high pressure steam is generated and used by coal, oil, liquefied gas, and nuclear power. These recent power generation methods generate carbon dioxide, accelerate global warming, and pose a risk to the human body. Therefore, in recent years, they are being switched to wind power generation or solar power generation.
However, these power generation methods using natural energy are unstable depending on the natural environment.
Therefore, a stable power generation method that does not generate carbon dioxide, has no risk of accidents, and is highly desired.

On the other hand, conventionally, all electrostatic forces acting on charges (q) placed in an electric field have been calculated using Coulomb's law (F = qE) shown in FIG.
In the figure, reference numeral 1 is a high-voltage electrode, reference numeral 2 is a grounded first counter electrode, reference numeral 3 is a point charge, reference numeral 4 is a vector of electrostatic force acting on the point charge, and reference numeral 5 is an electric field ( The lines of electric force) and reference numeral 6 indicate the second counter electrode which is grounded.
That is, on the left side of the center of FIG. 1, for example, when the electric field strength is 10 ⁶ V/m and the point charge amount is 10 ⁻⁷ C, the electrostatic force acting on the point charge is 0.100N.
On the other hand, when the direction of the electric field is reversed, as in the center right side of FIG. 1, the direction of the electrostatic force acting on the point charge is also reversed, but its magnitude (absolute value) is 0.100 N, which is unchanged. Also, Coulomb's law can be applied only to a point charge or a spherical charged body that can be regarded as a point charge.

On the other hand, the applicant cannot calculate the electrostatic force acting on a non-spherical charged conductor placed in an electric field using Coulomb's law. The electrostatic force acting on the conductor before and after the direction was reversed was calculated.
Specifically, as shown in FIG. 2, the shape of the charged conductor indicated by reference numeral 7 was a lateral gutter shape, and the amount of charge and the strength of the electric field were the same as those in FIG.
As a result, when the electric field was reversed, the absolute value of the electrostatic force acting on the non-spherical charged conductor changed greatly from 0.083N to 0.038N. In other words, I discovered the existence of an asymmetric electrostatic force. At that time, the electric field in the central left part of FIG. 2 in which the electrostatic force acting on the conductor is relatively large is defined as “forward electric field”, and the electric field in the right part where the electrostatic force is small is defined as “reverse electric field”. Note that this new phenomenon has been confirmed not only in the above simulations but also in experiments (Non-patent document [4]).

Therefore, the applicant has proposed an electric field drive type electrostatic generator using a so-called asymmetrical electrostatic force as a driving force as a new power generation method that can meet the above requirements. (Patent Documents [1][2][3][4]) (Non-Patent Documents [1][2])

Hereinafter, as a premise of the present invention, a principle of generating an asymmetric electrostatic force will be specifically described.
In FIG. 3, reference numeral 7 is a lateral gutter-shaped conductor, that is, an asymmetrical conductor, and black circles are electrons injected into the conductor 7. Reference numeral 5 indicates an electric field and its direction. Reference numeral 71 is a front vertical plate in the conductor. Reference numeral 72 is a rear upper and lower horizontal plate of the conductor.
In the figure, the conductor 7 on the left side is located in the electric field directed to the left, while the conductor 7 on the right side is located in the electric field directed to the right. The arrow with reference numeral 4 indicates the magnitude and direction of the electrostatic force acting on these asymmetrical conductors 7.
On the left side of the center of the figure, the electrons in the conductor 7 are attracted to the electric field 5 and move to the right, and most of them gather on the surface of the front vertical plate 71 of the conductor 7.
On the other hand, when the direction of the electric field 5 is reversed, the electrons are attracted by the electric field 5 and move to the left, and reach the rear upper and lower horizontal plates 72 of the conductor 7, but the left end faces of the rear upper and lower horizontal plates 72 are very much. Since it is narrow, the majority of electrons stay on the surface of the upper and lower horizontal plates.
Here, in the case of a conductor, the lines of electric force emitted from these electrons toward the holes and, conversely, the lines of electric force entering from the holes to the electrons are perpendicular to the surface of the conductor. As a result, the direction of the electrostatic force acting on the electron is also perpendicular to the surface of the conductor. That is, on the left side in the center of the figure, a large electrostatic force acts on the conductor 7 in the right direction, but on the right side in the center of the figure, an electrostatic force of equal magnitude acts on the conductor 7 in the upward and downward directions to cancel each other. However, there is no electrostatic force acting in the horizontal direction.
That is, when the direction of the electric field 5 is reversed as shown, the horizontal electrostatic force 4 acting on the gutter-shaped conductor 7 theoretically changes from 100% to about 0%. That is, an asymmetric electrostatic force is generated in the gutter-shaped conductor 7.
However, in reality, the typical charge distribution shown in FIG. 3 is not obtained, and therefore when the direction of the electric field is reversed, an electrostatic force acts on the conductor 7 in the left direction as well. However, even in that case, it is weaker than the electrostatic force in the right direction before the electric field is reversed, which is about half that.

Therefore, in the electric field drive type electrostatic generator in which the asymmetric electrostatic force is used as the driving force of the charge carrier, the charge carrier is charged by electrostatic induction at a potential of 0 V, and the charge carrier is first transferred to the forward electric field. After accelerating sufficiently with a strong electrostatic force inside, put it in a reverse electric field. In the reverse electric field, the electrostatic force (in the traveling reverse direction) acting on the charge carrier is weak, and when the potential of the charge carrier returns from the positive potential to 0 V in the reverse electric field, the charge carrier Surplus kinetic energy remains. As a result, the charge carrier can reach higher potentials.
That is, about half of the energy generated by the difference between the strong electrostatic force acting on the charged charge carrier in the forward electric field and the weak electrostatic force acting in the reverse electric field is the electric energy for raising the electric charge to a higher potential, and about half the remaining energy. Are dissipated in the mechanical energy that drives the charge carrier.

FIG. 4 is a front view of a basic unit of such an electric field drive type electrostatic generator.
In the figure, reference numeral 8 is a charge injection electrode, reference numeral 9 is a high potential source (high voltage electrode, electret, ferroelectric), reference numeral 11 is a charge carrier, reference numeral 10 is a charge recovery electrode, Reference numeral 12 is a collecting part condenser connected to the charge collecting electrode 10, and reference numerals 13 and 15 are insulating supports for supporting these electrodes 8 and 10 and a high potential source (high voltage electrode, electret, ferroelectric) 9. The body (upper and lower pair) is shown.
Note that reference numerals 4 and 5 indicate the electrostatic force and electric field (electric force lines) applied to the charge carrier 11 as in FIGS. 1 and 2.
Here, the high potential source (high voltage electrode, electret, ferroelectric) 9 is, for example, an electret having a surface charge density of 0.1 mC/m ² , and its potential is, for example, +2000V. On the other hand, the potential of the charge injection electrode 8 is 0V, and the potential of the charge recovery electrode 10 is -200V, for example.
As a result, a forward electric field is formed between the charge injection electrode 8 and the high potential source 9 of the electret with respect to the charge carrier 11 that is negatively charged. On the other hand, a reverse electric field is formed between the high potential source 9 of the electret and the charge recovery electrode 10 with respect to the same charge carrier 11.

As described above, since the charge carrier 11 is a laterally oriented gutter type, the charge carrier 11 has a left-right asymmetrical shape with respect to a perpendicular line perpendicular to the direction of the electric field or the moving direction of the charge carrier 11 in the lateral center of the vertical section. Therefore, it has a front-back asymmetric shape in the moving direction.
The charge carrier 11 is made of a light conductor, for example, aluminum, and is held by an insulating charge carrier holder (not shown). As a result, it is electrically floated. The charge carrier 11 is driven by the asymmetric electrostatic force 4 in the front-rear direction, moves from left to right in FIG. 4, and sequentially passes through the charge injection electrode 8, the high potential source 9 of the electret, and the charge recovery electrode 10. ..
When the charge carrier 11 passes through the pair of upper and lower charge injection electrodes 8, that is, a conductive terminal (hereinafter, referred to as a charge) provided on the charge injection electrode 8 and made of a material such as aluminum foil or conductive thread shown in FIG. When an injection terminal 23 comes into contact with the charge carrier 11, for example, a negative charge is injected into the charge carrier 11 by electrostatic induction.
Further, when the charge carrier 11 is deeply inserted into the (upper and lower pair) charge recovery electrodes 10, conductive terminals for recovering the carrier charge (hereinafter referred to as “conductive terminals” shown in FIGS. , Which is referred to as a charge recovery terminal) 24 contacts the charge carrier 11, and the injected charge of the charge carrier 11 is recovered.
FIG. 5 is a schematic diagram showing a charge injection system for injecting charges into the charge carrier 11 by electrostatic induction in the electric field drive type electrostatic generator shown in FIG.
In the figure, reference numeral 8 is a grounded charge injection electrode, reference numeral 9 is a high-voltage electrode to which a voltage is applied by a high potential source, reference numeral 11 is a charge carrier, and reference numeral 23 is a charge injection terminal. ..

That is, in the forward electric field, even if the charge carrier 11 is accelerated by a strong electrostatic force and the charge carrier 11 enters the reverse electric field and decelerates, the reverse electrostatic force received by the charge carrier 11 is weak. The charge recovery electrode 10 arrives at a sufficient speed.

6 and 7 are experimental machines created by using the basic unit shown in FIG. 4, the former showing its plan view and the latter showing its front view (Non-Patent Document 3).
That is, the experimental machine is a double cylinder with an outer diameter of 100 mm and two sets of electrodes 8, 9, 10 which are the basic units shown in FIG. On the lower surface of the charge carrier disk 14, six charge carrier bodies 11 of the basic unit are lined up and suspended at intervals of 60 degrees, and the charge carrier bodies 11 rotate between the inner and outer electrodes of the electrodes 8, 9 and 10. It was made possible to move.
In FIG. 7, reference numeral 16 is a rotating shaft (support), reference numeral 17 is a ball bearing, reference numeral 20 is a wooden substrate that supports the rotating shaft, reference numeral 21 is a resin substrate of the entire apparatus, and reference numeral 22 is an entire apparatus. It is a wooden board.
In the experimental machine, the width of the charge injection electrode 8 (horizontal direction, the same applies hereinafter) is 10 mm, the width of the high-voltage electrode 9 is 10 mm, the distance between them (horizontal direction) is 30 mm, the length of the charge carrier 11 is 50 mm, and its width is Is 5 mm and its depth is 5 mm.
With this configuration, when the charge injection electrode 8 was grounded and a high voltage of +7 kV or higher was applied to the high voltage electrode 9, the charge carrier disk 14 continued to rotate at about 100 rpm and was connected to the charge recovery electrode 10. The surface potential of the condenser 12 of the recovery part was raised to the negative side. That is, it generated electricity.
The output was 1.54 μW (100 V, 15.4 nA) when +8.0 kV was applied to the high voltage electrode 9. Further, the amount of injected charges per injection at that time was -0.86 nC (see Non-Patent Document [3]).

As described above, in the conventional electric field drive type electrostatic generator in which electric charges are indirectly injected into the charge carrier 11 by indirect electrostatic induction, the amount of charges injected and carried at one time is not sufficient, Since the obtained electric potential is not high, a new technology that enables higher output is desired.

[Patent Document 1] Japanese Patent Application Laid-Open No. 2009-232667 [Patent Document 2] Japanese Patent No. 6136050 [Patent Document 3] Japanese Patent No. 6286767 [Patent Document 4] Japanese Patent Application Laid-Open No. 2018-029425

[Non-Patent Document 1] [Asymmetric Electrostatic Forces and a New Electrostatic Generator], Nova Science Publishers, New York, 2010
[Non-Patent Document 2] Proceedings of 2017 Annual Meeting of the Electrostatic Society of America A-3
[Non-Patent Document 3] K. Sakai, “The electric field driven generator”, Proceedings of IEEE EECCMC Conference (2018) 01-2018-785
[Non-Patent Document 4] [Asymmetric Electrostatic Force], K. Sakai, Journal of Electromagnetic Analysis and Applications, Scientific Research

An object of the present invention is to significantly increase the amount of electric charge carried by a charge carrier in an electric field drive type electrostatic generator and to significantly improve the output thereof.

Means for solving the problem

An object of the present invention is to bring a grounded charge carrier into close contact with a so-called electret, which is charged with a fixed charge, and electrostatically induces a charge having a different polarity from the electret in the charge carrier (hereinafter , Contact electrostatic induction), and can be achieved by injecting a large amount of charges into the charge carrier.

According to each embodiment of the present invention, since the amount of charge injected into the charge carrier by the contact electrostatic induction is orders of magnitude larger than the amount of charge injected by the indirect electrostatic induction, the charge that the charge carrier can carry. The quantity increases significantly, and as a result, the output of the electrostatic generator also increases.

FIG. 1 is a schematic diagram illustrating Coulomb's law. FIG. 2 is a schematic diagram illustrating a front-back asymmetric electrostatic force using a lateral gutter-shaped conductor. FIG. 3 is a schematic diagram for explaining the principle of generation of an asymmetric electrostatic force in the front-rear direction, which uses a lateral gutter-shaped conductor. FIG. 4 is a vertical cross-sectional view of a basic unit of an electric field drive type electrostatic generator. FIG. 5 is an enlarged view of a charge injection portion of a conventional electric field drive type electrostatic generator that inductively injects charges. FIG. 6 is a plan view of a conventional electric field drive type electrostatic generator experimentally injecting charges by indirect electrostatic induction. FIG. 7 is a front view of a conventional electric field drive type electrostatic generator experimental machine that injects charges by indirect electrostatic induction. FIG. 8 is a vertical cross-sectional view of a basic unit of an electric field drive type electrostatic generator according to an embodiment of the present invention in which charges are injected by a contact type electrostatic induction. FIG. 9 is an enlarged view of a portion in which electric charges are injected by electrostatic induction of a contact type by using a flat plate-shaped insulator in which electric charges are fixed in an electric field drive type electrostatic generator according to an embodiment of the present invention. Is. FIG. 10 shows an electric field drive type electrostatic generator according to an embodiment of the present invention, in which a rotatable cylindrical electric charge is used as an insulator to inject the electric charge by a contact type electrostatic induction. FIG. FIG. 11 shows an electric field drive type electrostatic power generator according to an embodiment of the present invention, which uses a rotatable endless belt-shaped insulator with a fixed electric charge to perform electric charge by a contact type electrostatic induction. It is an enlarged view of the part to inject.

BEST MODE FOR CARRYING OUT THE INVENTION

The applicant of the present invention aims to significantly increase the amount of electric charge carried by a charge carrier in an electric field driven electrostatic generator to significantly improve the output of the generator. This is realized by bringing the high dielectric material) into close contact with the charge carrier, and charging (that is, charging) the charge carrier with the charges electrostatically induced in the charge carrier when the charge carrier is grounded.

FIG. 8 shows a basic unit of the electric field drive type electrostatic power generator according to the first embodiment of the present invention for charging and injecting electric charges into the charge carrier 11 by the electrostatic induction of the contact type.
In the figure, reference numeral 18 is an insulator, which fixes the charges so that they cannot move even when an electric field is applied, and the charge carrier 11 that is grounded moves closely. The insulator is specifically an electret or a ferroelectric having a predetermined potential. Other than that, the members having the same reference numerals as the basic unit of the conventional electric field drive type electrostatic generator shown in FIG. 4 are the same as the basic unit.

Here, in the close-contact electrostatic induction method, the charges electrostatically induced in the charge carrier 11, which is a ground conductor that is in close contact with the electret 18, have the opposite polarity (positive) to the charge (negative) of the electret 18, and the density thereof is the electret. Equal to a charge density of 18.
Currently, the commercially available electret with a high charge density is -1.0 mC/m ² , and the total area of the upper and lower horizontal plates 72 of the charge carrier 11 used in the prototype experimental machine is assumed to be the use of the commercially available electret. Is 0.0005m ² (5mm*50mm*2=500mm ² ), so the amount of electrostatically induced charge is -0.5μC, or -500nC. This is more than 500 times as large as the injected charge amount of -0.86 nC per indirect electrostatic induction obtained by the prototype experimental machine.
Furthermore, since the electrostatic force acting on the charge carrier 11 is proportional to the amount of charge, the rotation speed of the charge carrier disk 14 also reaches, for example, 100 rpm to 30000 rpm (the upper limit of the permissible rotation speed of the ball bearing 17). Due to the increase of the rotation speed, the output of the generator reaches 150,000 times, that is, 0.22W.
Further, by using an electret having a higher charge density, or by using a ferroelectric material instead of the electret, the output of 10 times or 100 times can be expected.
If the horizontal plate is still grounded even after the horizontal plate is separated from the electret after charging by contacting the entire surface, the injected charge is grounded and returns to the ground. To prevent this, a commutator is inserted here. That is, charges can be injected, but they are prevented from flowing out.

FIG. 9 is an enlarged view of a charge injection portion for injecting charges into the charge carrier 11 by the above-mentioned close electrostatic induction. The illustration of the charge injection terminal 23 is omitted.
That is, as shown in FIG. 8, in order to move the rear upper and lower horizontal plates 72 of the charge carrier 11 in close contact with a plate-shaped insulator (hereinafter, referred to as an electret plate) 18 in which electric charges are fixed to move while charging. Requires a high degree of mechanical dimensional accuracy.
Therefore, as shown in FIG. 9, when the upper and lower electret plates 18 are fixed to the upper and lower supports 13 and 15 via the upper and lower springs 19, respectively, and the charge carrier 11 enters between the upper and lower electret plates 18. If the upper and lower electret plates 18 can be moved up and down, a high degree of mechanical dimensional accuracy is unnecessary.
In order to reduce the mechanical shock at the moment when the charge carrier 11 enters between the upper and lower electret plates 18, it is preferable to round each corner of the electret plate 18 and the charge carrier 11 as illustrated.
Furthermore, since the charge carrier 11 is moved while being in contact with the fixed electret plate 18, it is also desirable to apply a lubricant such as nanodiamond between them in consideration of the friction generated therebetween.
Further, since the electret plate 18 usually has a Teflon (registered trademark) layer on the surface thereof, each metal surface of the upper and lower horizontal plates 72 of the charge carrier 11 is thinly coated with Teflon (registered trademark) to form a Teflon (registered trademark) layer. It is also effective to adopt a mode in which the members rub each other.
In this case, if the thickness of the Teflon (registered trademark) thin layer is 10 μm or less, the injected charge amount hardly decreases.

FIG. 10 is a schematic diagram showing a main part of an electric field drive type electrostatic power generator according to the second embodiment of the present invention in which charges are injected into the charge carrier 11 by the contact electrostatic induction.
In order to reduce the mechanical friction generated when the charge carrier 11 is moved while contacting the fixed electret plate 18, both may be moved at a constant speed. Specifically, the shape of the electret plate 18 may be a cylindrical shape that can freely rotate.
However, if it is made solid, it becomes line-adhered, and the electrostatically induced charges are reduced, so it is preferable to use a deformable soft body as shown in FIG. The charge injection terminal 23 is not shown in the figure.
In this case, unless the electret has a fixed charge, the contact portion of the soft cylinder is only dented, but between the negative charge of the electret cylinder 18 and the positive charge electrostatically induced by the charge carrier 11. Has a strong electrostatic force, so that it is pulled by the moving charge carrier 11 and the electret cylinder 18 also rotates at a constant speed.
The soft electret cylinder 18 can be produced, for example, by forming an electret layer on a cylindrical rubber surface by coating or dipping and irradiating the surface with negative ions or electrons with a corona discharge, an electron gun or the like.

FIG. 11 is a schematic diagram showing a main part of an electric field drive type electrostatic generator according to a third embodiment of the present invention, which charges and injects electric charges into the charge carrier 11 by close electrostatic induction.
An electret belt can be used instead of the soft electret cylinder 18 of the second embodiment. In FIG. 11, reference numeral 18 indicates an electret belt, and reference numeral 25 indicates a rotation axis of the belt. The illustration of the charge injection terminal 23 is omitted.
Here, the space between the lower surface of the electret belt 18 and the upper horizontal plate 72 of the charge carrier 11 is not zero, but may be slightly opened as shown in the figure. That is, the electret belt 18 is composed of, for example, a Teflon (registered trademark) film for electret having a thickness of 25 μm, which has been subjected to back-side conductive processing. It sticks to the upper and lower plates 72 and is pulled.

As described above, the invention of the electrostatic generator has been described, but when the charge recovery electrode 10 is grounded without being connected to the recovery unit capacitor 12, the energy generated by the difference in electrostatic force between the forward electric field and the reverse electric field is the potential of the carrier charge. It is not consumed to raise it, but all becomes an electrostatic accelerator because it is directed to the acceleration of the charge carrier 11.
Further, in this case, when the charge carrier disk 14 is used and the rotation of the charge carrier disk 14 is fixed at a low speed, the force to accelerate further can be extracted to the outside through the rotary shaft 16. Yes, it becomes an electrostatic motor.

1: High-voltage electrode 2: First counter electrode 3: Point charge 4: Arrow indicating the vector of electrostatic force acting on the point charge: Arrow indicating the direction of the electric field 6: Second counter electrode 7: Front-back asymmetrical in the direction of the electric field 71: a gutter-shaped conductor, or a front vertical plate of a charge carrier having a longitudinally asymmetrical shape in the direction of the electric field 72: a gutter-shaped conductor, or a longitudinally asymmetrical shape in the direction of the electric field Rear upper and lower horizontal plates of charge carrier 8: Charge injection electrode 9: High potential source (high voltage electrode, electret, ferroelectric)
10: charge recovery electrode 11: charge carrier having an asymmetrical shape in the direction of the electric field 12: recovery unit capacitor 13 connected to the charge recovery electrode 13: charge injection electrode, high voltage electrode, and insulating property for supporting the charge recovery electrode Support 14: Charge carrier disk 15 that holds a plurality of charge carriers: Insulating support 16 that supports the charge injection electrode, high voltage electrode, and charge recovery electrode 16: Rotation shaft (support) of the charge carrier disk
17: Ball bearing 18: Insulator with fixed charge (electret, ferroelectric)
19: Support spring 20 of an insulator having a fixed charge: Wooden substrate 21 supporting a fixed shaft (support): Resin substrate 22 of the entire device: Wooden substrate 23 of the entire device: Charge injection terminal 24: Charge recovery terminal 25: Electret Belt rotation axis

Claims (11)

The insulator holding the fixed charge, the high potential source, and the charge recovery electrode are juxtaposed at a constant interval, and the potential of the high potential source is set to the highest absolute value. And a conductor having an asymmetrical shape before and after its moving direction is charged and retains an electric charge, and is driven by an asymmetrical electrostatic force acting on itself to move the positive and negative continuous electric field. A device,
To charge the conductor and retain the charge, the surface of the insulator and the surface of the conductor are temporarily brought into close contact with each other and the conductor is grounded to electrostatically induce a charge having a polarity different from that of the fixed charge on the conductor surface. Electrostatic force applied equipment that is performed by doing. In Claim 1, the conductor having an asymmetrical shape is a substantially box-shaped member whose opposite side in the moving direction is open, and at least one of the upper and lower horizontal plates is in contact with an insulator holding the fixed electric charge. .. The electrostatic force application device according to claim 1, wherein the insulator holding the fixed charge is held by a support and has a flat plate shape. 4. The electrostatic force application device according to claim 3, wherein the planographic insulator is fixed to the support via a spring, and the spring expands and contracts in a direction substantially perpendicular to the moving direction of the conductor. The electrostatic force application device according to claim 1, wherein the insulator holding the fixed charge has a rotatable cylindrical shape and guides the conductor in the moving direction. The electrostatic force application device according to claim 5, wherein the cylindrical insulator is made of a soft material that can be easily deformed. The electrostatic force application device according to claim 1, wherein the insulator holding the fixed charge has a shape of a rotatable endless belt. The electrostatic force application device according to claim 7, wherein the endless belt-shaped insulator has a margin in a traveling direction thereof. The electrostatic force application device according to claim 1, wherein a lubricant is applied to the surface of the insulator that holds the fixed charge. The electrostatic force application device according to claim 1, wherein a thin layer made of the same material as the insulator is provided on the surface of the conductor that is in close contact with the surface of the insulator that holds the fixed charge. The electrostatic force application device according to any one of claims 1 to 10, wherein an electrostatic generator that collects electric charges carried by the conductor by the charge recovery electrode to generate electric power, or static electricity that does not recover the charges by grounding the charge recovery electrode. An electrostatic force application device that is an electric motor or an electrostatic accelerator.

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