WO2008053793A1 - Dispositif à actionnement électrostatique - Google Patents
Dispositif à actionnement électrostatique Download PDFInfo
- Publication number
- WO2008053793A1 WO2008053793A1 PCT/JP2007/070876 JP2007070876W WO2008053793A1 WO 2008053793 A1 WO2008053793 A1 WO 2008053793A1 JP 2007070876 W JP2007070876 W JP 2007070876W WO 2008053793 A1 WO2008053793 A1 WO 2008053793A1
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- WO
- WIPO (PCT)
- Prior art keywords
- conductor layer
- film
- electrode
- electret film
- insulating film
- Prior art date
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N1/00—Electrostatic generators or motors using a solid moving electrostatic charge carrier
- H02N1/002—Electrostatic motors
- H02N1/006—Electrostatic motors of the gap-closing type
Definitions
- the present invention relates to an electrostatic operation device, and more particularly, to an electrostatic operation device including an electret film.
- the electrostatic induction power generating device disclosed in Japanese Patent Laid-Open No. 2006-180450 is composed of two substrates provided to face each other with a predetermined distance therebetween.
- a plurality of strip-like electrodes are formed on the surface of one substrate facing the other substrate.
- a plurality of strip-like conductor layers are formed on the surface of the other substrate facing the one substrate, and an electret film that is a charge holding material is formed on the surface of the conductor layer. Is formed.
- at least one of the two substrates is subjected to inertial force and repeatedly vibrates, so that the electric charge accumulated in the electret film induces to the electrode facing the electret film. The generated charge changes, and the change is output as a current.
- the electrostatic actuator disclosed in Japanese Patent Laid-Open No. 4-112683 is composed of a stator including a plurality of electrodes and a vibrator including a substrate made of Teflon (registered trademark).
- a predetermined region of the substrate made of Teflon (registered trademark) is partially electretized by corona discharge.
- one electret region of a substrate made of Teflon (registered trademark) has a strip shape, and a plurality of electret strip regions are constant. It is formed on the substrate at an interval.
- the plurality of electrodes included in the stator and the plurality of electret regions of the substrate made of Teflon (registered trademark) are arranged so as to face each other, and the voltages of the plurality of electrodes are respectively changed ( Including a Teflon (registered trademark) substrate.
- the vibrator is moved in a horizontal direction with respect to the opposing stator.
- the electret film which is a charge retention material, is formed in a strip shape, and is formed in a strip shape.
- the amount of electric charge stored in the electret film is reduced, so that the amount of power generated by the electrostatic induction power generation device is reduced.
- the electric charge is not electretized from a plurality of electretized regions of the substrate made of Teflon (registered trademark). There is a problem of leaking. For this reason, the difference between the potential of the electretized region and the potential of the non-electretized region is reduced, so that the switching between the motion of the vibrator and the motion of stopping is slow.
- the partially electretized Teflon (registered trademark) substrate disclosed in Japanese Patent Laid-Open No. 4-112683 is used as the other side of the electrostatic induction power generating device disclosed in Japanese Patent Laid-Open No. 2006-180450.
- the present invention has been made to solve the above-described problems, and one object of the present invention is an electrostatic operation device capable of suppressing the outflow of electric charge from an electret film. Is to provide.
- An electrostatic operation device is provided so as to face a first electrode part including a first electrode and a first electrode part at a predetermined distance, and accumulates electric charges.
- a first electrode layer including an electret film and a first conductor layer formed on a predetermined region of the upper surface of the electret film; and provided between the electret film and the first conductor layer. And a first insulating film.
- the first conductor layer by forming the first conductor layer on a predetermined region on the upper surface of the electret film capable of accumulating charges, for example, when the first conductor layer is grounded or when a predetermined voltage is applied, the first conductor layer has a function of shielding the electric field due to the electric charge accumulated in the electret film.
- the electric field in the region where the first conductor layer is formed is small, and the electric field in the region where the electret film is exposed is large.
- the second electrode When an electrostatic induction power generation device is used as the electrostatic operation device, the second electrode can be obtained by repeating that at least one of the first electrode portion and the second electrode portion vibrates due to inertial force. Since the electric field is large, the region and the electric field are small, and the region are on the surface of the part, the amount of charge induced in the first electrode facing the electret film changes. As a result, the change in charge induced in the first electrode can be output as a current.
- an electrostatic actuator is used as the electrostatic operation device, a signal (voltage) is applied to the first electrode unit, thereby acting between the first electrode unit and the electret film included in the second electrode unit.
- the second electrode can be moved by Coulomb force.
- the voltage applied to the first electrode portion can be reduced as compared with the case of processing the electret film, so that the power consumption of the electrostatic actuator is reduced. Can be reduced. Also, if the charge is distributed over the entire surface of the electret film, the charge is electretized from the electretized area as in the case of a locally electretized film. No spillage will occur. As a result, the difference between the potential of the electret region and the potential of the electret force and the potential of the region does not decrease.
- an electrostatic induction power generation device when used as the electrostatic operation device, it is possible to suppress the amount of change in charge induced to the first electrode facing the outer electrodelet film from being reduced. It is possible to suppress the decrease in power generation.
- an electrostatic actuator when using an electrostatic actuator as an electrostatic operation device
- the charge is electretized from the electretized region by disposing the first conductor layer on the surface of the region that is not electretized. Even if it moves to the area, it is electretized! /, Na! / ⁇
- the electric field due to the electric charge that flows out to the area where the first conductor layer arranged on the surface of the area is not electretized Therefore, it is possible to suppress the gradual change in the electric field at the boundary between the electret region and the non-electret region.
- the electret film and the first conductor layer are separated by the insulating film, so that the first conductive film is separated from the electret film. It is possible to suppress the electric charge from flowing out to the body layer. As a result, when an electrostatic induction power generating device is used as the electrostatic operation device, it is possible to further suppress the decrease in the amount of power generation. In addition, when an electrostatic actuator is used as the electrostatic operation device, the power consumption of the electrostatic actuator is made smaller than when an insulating film is not provided between the electret film and the conductor layer. be able to.
- the first conductor layer and the first insulating film are preferably formed in the same shape when seen in a plan view. If comprised in this way, a 1st conductor layer and a 1st insulating film can be processed simultaneously easily.
- the second is preferably formed on the surface of the electret film facing the first electrode, and suppresses the outflow of charges from the surface of the electret film.
- An insulating film is further provided. If configured in this way, the electret film force is suppressed by the second insulating film, and electric charge is prevented from flowing out to the first conductor layer, and the first conductor layer is formed! / ,! It is possible to suppress the outflow of charges from the surface of the electret film.
- an electrostatic induction power generation device is used as the electrostatic operation device, it is possible to more effectively suppress a decrease in the amount of power generation.
- an electrostatic actuator is used as the electrostatic operation device, it is possible to reduce the power consumption of the electrostatic actuator by more / J, compared with the case where the second insulating film is not provided. .
- the second insulating film is formed on the entire surface of the electret film. Yes. With this configuration, it is possible to further suppress the outflow of electric charge from the electret film compared to the case where the second insulating film is partially formed on the surface of the electret film.
- the first insulating film is formed on the surface of the second insulating film, and
- the surface on which the first insulating film is formed may be formed in a convex shape.
- the second insulating film is formed on the surface of the electret film and on the side surface of the first insulating film. Formed on the top and side surfaces of the first conductor layer. If comprised in this way, since the surface of an electret film
- the first electrode includes a plurality of first electrode portions provided at a first interval, and the width of the first conductor layer is It is larger than the first interval between adjacent first electrode parts.
- the first electrode portion further includes a first substrate on which the first electrode is formed, and the first conductivity formed on the electret film.
- the thickness of the body layer is larger than the thickness of the first electrode formed on the first substrate.
- a third insulating film is formed between the first substrate and the first electrode.
- the third insulating film may be formed so as to cover the surface of the first substrate.
- the third insulating film has the same shape as the first electrode in plan view. You may form in.
- the first conductor layer is preferably grounded. With this configuration, the potential of the first conductor layer is fixed, so that the strength of the electric field on the surface of the electret film can be stabilized.
- a predetermined voltage is applied to the first conductor layer.
- the surface of the electret film on which the first insulating film is formed may be formed in a convex shape.
- the second electrode portion includes a conductive second substrate on which an electret film is formed.
- the first electrode and the second substrate are preferably connected via a bridge rectifier circuit.
- the amount of change in the charge accumulated in the first electrode can be easily taken out as a current by the bridge rectifier circuit.
- the second electrode portion includes an insulating third substrate on which an electret film is formed, a third substrate, and an outer electrodelet film. And a second conductor layer formed between the two.
- the second conductor layer may be formed so as to cover the surface of the third substrate.
- the second conductor layer has the same shape as the first conductor layer in plan view. You may form so that it may have.
- the first electrode and the second conductor layer are preferably connected via a bridge rectifier circuit. It is connected. With this configuration, it is possible to easily extract the amount of change in the charge accumulated in the first electrode as a current by the bridge rectifier circuit.
- FIG. 1 is a cross-sectional view of an electrostatic induction power generating device according to a first embodiment of the present invention.
- FIG. 2 is a cross-sectional view taken along line 100-100 in FIG.
- FIG. 3 is a cross-sectional view taken along line 200-200 in FIG.
- FIG. 4 is a diagram schematically showing the surface potential of the fixed electrode portion of the electrostatic induction power generating device according to the first embodiment of the present invention and Comparative Example 1.
- FIG. 5 is a cross-sectional view for explaining the power generation operation of the electrostatic induction power generating device according to the first embodiment of the present invention.
- FIG. 6 is a cross-sectional view of an electrostatic induction power generating device according to a second embodiment of the present invention.
- FIG. 7 is a cross-sectional view of an electrostatic induction power generating device according to a third embodiment of the present invention.
- FIG. 8 is a cross-sectional view of an electrostatic induction power generating device according to a fourth embodiment of the present invention.
- FIG. 9 is a cross-sectional view of an electrostatic induction power generating device according to a fifth embodiment of the present invention.
- FIG. 10 is a sectional view of an electrostatic induction power generating device according to a sixth embodiment of the present invention.
- FIG. 11 is a sectional view taken along line 300-300 in FIG.
- FIG. 12 is a cross-sectional view of a sample of an experiment conducted for measuring the surface potential of a comb-like electret film formed on a silicon substrate.
- FIG. 13 is a cross-sectional view of a sample of an experiment conducted for measuring the surface potential of an electret film when a comb-like insulating film and a conductor layer are formed on the electret film.
- FIG. 14 is a diagram showing the relationship between the comb tooth width of the comb-like conductor layer, the thickness of the insulating film, and the surface potential of the electret film.
- FIG. 15 is a diagram showing a change with time of the surface potential of the electret film.
- FIG. 16 is a graph showing a change with time of the surface potential of the electret film.
- FIG. 17 is a cross-sectional view of a fixed electrode portion of an electrostatic induction power generating device according to a modification of the first embodiment of the present invention.
- FIG. 18 is a cross-sectional view of a fixed electrode portion of an electrostatic induction power generating device according to a modification of the second embodiment of the present invention.
- FIG. 19 is a cross-sectional view of a fixed electrode portion of an electrostatic induction power generating device according to a modification of the second embodiment of the present invention.
- FIG. 20 is a cross-sectional view of a movable electrode portion of an electrostatic induction power generating device according to a modification of the first to sixth embodiments of the present invention.
- FIG. 21 is a cross-sectional view of a movable electrode portion of an electrostatic induction power generating device according to a modification of the first to sixth embodiments of the present invention.
- FIG. 22 is a cross-sectional view of a movable electrode portion of an electrostatic induction power generating device according to a modification of the first to sixth embodiments of the present invention.
- FIG. 23 is a cross-sectional view of a fixed electrode portion of an electrostatic induction power generating device according to a modification of the first embodiment of the present invention.
- FIG. 24 is a cross-sectional view of a fixed electrode portion of an electrostatic induction power generating device according to a modification of the first embodiment of the present invention.
- FIG. L With reference to FIG. 4, the structure of the electrostatic induction power generating device 1 according to the first embodiment will be described. In the present embodiment, the case where the present invention is applied to an electrostatic induction power generation device 1 which is an example of an electrostatic operation device will be described.
- the electrostatic induction power generating device 1 is arranged such that the fixed electrode portion 10 and the movable electrode portion 20 face each other.
- the fixed electrode portion 10 and the movable electrode portion 20 are examples of the “second electrode portion” and the “first electrode portion” in the present invention, respectively.
- the electrostatic induction power generating device 1 also includes a bridge rectifier circuit 2 for rectifying the generated power and a DC-DC converter 3 for changing the voltage of the direct current.
- the DC-DC converter 3 converts the electric power generated by the electrostatic induction generator 1 into A more driven load 4 is connected. Also, the DC-DC converter 3 and the load 4 are grounded.
- a thickness of about 0.1 m to about 100 m is formed on the surface of the fixed substrate 11 made of A having a thickness of about 50 nm to about lOOOnm.
- An electret film 12 made of a fluorine-based resin typified by polytetrafluoroethylene (PTFE) or a silicon oxide film is formed.
- the fixed substrate 11 is an example of the “second substrate” in the present invention. Further, the electret film 12 is adjusted to a potential of about 20 V to about 2000 V by negatively charging the entire surface by corona discharge so that the charge is distributed as a whole.
- an HDP (High Density Plasma) oxide film having a thickness of about lOnm to about lOOOnm, and an insulating film 13 made of SiOC or SiN are provided.
- the insulating film 13 is an example of the “first insulating film” in the present invention.
- the insulating film 13 is formed in a comb-like shape when seen in a plan view, like a conductor layer 14 described later shown in FIG.
- the insulating film 13 and the conductor layer 14 may have substantially the same shape in plan view so that the electret film 12 and the conductor layer 14 can be separated.
- the insulating film 13 and the conductor layer 14 are formed so as to be tapered from the upper surface of the conductor layer 14 toward the lower surface of the insulating film 13, the insulating film 13 and the conductor layer 14 are formed. When viewed in plan, the insulating film 13 may be formed larger.
- a conductor layer 14 having a thickness of about 50 nm to about lOOOnm is formed on the upper surface of the insulating film 13.
- the conductor layer 14 is an example of the “first conductor layer” in the present invention. In the first embodiment, the conductor layer 14 is grounded. Also, as shown in FIG.
- the conductor layer 14 is formed in a comb-teeth shape, and the width W1 of the tooth portion of the comb teeth and the interval W2 between the teeth are respectively About lmm.
- the electret film 12 and the conductor layer 14 are not in contact with each other due to the insulating film 13. Further, the insulating film 13 and the conductor layer 14 may be formed in a strip shape.
- a movable electrode 22 is formed on the lower surface of the movable substrate 21 having an insulating glass force having a thickness of about 300 ⁇ m to about 1000 ⁇ m.
- A having a thickness of about 50 nm to about lOOOnm.
- a movable electrode 22 is formed.
- the movable substrate 21 is an example of the “first substrate” in the present invention.
- the movable electrode 22 is formed in a comb-teeth shape as shown in FIG.
- the tooth width W3 and the tooth spacing W4 are about lmm, respectively.
- the movable electrode 22 is an example of the “first electrode” in the present invention, and the comb tooth portion of the movable electrode 22 is an example of the “first electrode portion” in the present invention.
- the fixed substrate 11 and the movable electrode 22 are connected via the bridge rectifier circuit 2.
- the conductor layer 14 and the movable electrode 22 are opposed to each other so that no vibration is applied to the electrostatic induction power generation device 1! It's arranged like this! /!
- the solid line a shown in FIG. 4 represents the potential of the surface of the fixed electrode portion 10 when the fixed electrode portion 10 is viewed from the movable electrode 22 side in the first embodiment, and the horizontal axis is The surface area of the fixed electrode portion 10 (the area where the electret film 12 is exposed and the area where the conductor layer 14 is formed) is represented, and the vertical axis represents the potential of the surface of each area.
- regions where the electret film 12 is exposed and regions where the conductor layer 14 is formed are alternately present. Of the exposed region and the region where the conductor layer 14 is formed, the surface potential is higher in the region where the electret film 12 is exposed.
- the change in potential at the boundary between the region where the electret film 12 is exposed and the region where the conductor layer 14 is formed is steep.
- the dotted line b shown in FIG. 4 is formed so that the region corresponding to the conductor layer 14 of the electret film 12 is not electretized as Comparative Example 1 instead of using the conductor layer 14 of the first embodiment.
- the charge force accumulated in the electretized region is electretized and flows out to the non-electret region as shown in FIG.
- the potential change at the boundary between the electret region and the non-electret region is gentler than the potential change in the first embodiment indicated by the solid line a.
- the power generation operation 1 will be described.
- the surface of the electret film 12 and the movable electrode 22 are arranged to face each other with a predetermined interval.
- a negative potential about 20 V to about 2000 V
- a positive charge is induced in the movable electrode 22 by electrostatic induction.
- the horizontal direction (X direction) vibration is applied to the electrostatic induction power generating device 1, and the movable electrode 22 moves in the X direction. Moves to a position facing the conductor layer 14.
- the potential force S facing the movable electrode 22 changes from the potential of the electret film 12 (about 20 V to about 2000 V) to the potential of the conductor layer 14 (ground), so that it is induced to the movable electrode 22 by electrostatic induction.
- the amount of charge that is applied changes. This change in charge becomes a current, which is output to the load 4 via the bridge rectifier circuit 2 and the DC-DC converter 3. Due to the vibration, the movable electrode unit 20 repeats the state shown in FIG. 1, the state shown in FIG. Done.
- the comb-like conductor layer 14 is formed on the surface of the electret film 12 capable of accumulating charges, thereby forming the surface of the electret film 12.
- the formed conductor layer 14 has a function of blocking the electric field due to the electric charges accumulated in the electret film 12, and therefore the region where the conductor layer 14 is formed on the surface of the fixed electrode portion 10 facing the movable electrode portion 20.
- the electric field in the region where the electret film 12 is exposed becomes large.
- the electret film 12 can be formed on the surface of the fixed electrode portion 10 without processing the electret film 12 into, for example, a comb-like shape.
- the insulating film 13 provided between the electret film 12 and the conductor layer 14 is provided, so that the electret film 12 and the conductor layer 14 are completely disconnected. Since it is separated by the edge film 13, it is possible to suppress the flow of electric charges from the electret film 12 to the conductor layer 14. Thereby, the reduction
- the conductor layer 14 and the insulating film 13 are easily insulated from the conductor layer 14 by forming the conductor layer 14 and the insulating film 13 in the same shape in plan view. Use force S to squeeze film 13 at the same time.
- the strength of the electric field on the surface of the electret film 12 is increased.
- the power S is used to stabilize
- the fixed substrate 11 is conductive, the movable electrode 22 and the fixed substrate can be easily connected by connecting the movable electrode 22 and the fixed substrate 11. 11 can cause electrostatic induction.
- the movable electrode 22 and the fixed substrate 11 are connected to each other via the bridge rectifier circuit 2, so that the movable electrode 22 can be easily accumulated.
- the amount of change in charge can be taken out as current by the bridge rectifier circuit 2.
- the electric charge flows out from the surface of electret film 12 on the entire surface of electret film 12 facing movable electrode 22.
- the electrostatic induction power generating device la provided with the charge outflow suppressing film 15 for suppressing the above will be described.
- the fixed electrode portion 10a in the fixed electrode portion 10a, about 1 Onm is formed on the entire surface of the electret film 12 facing the movable electrode portion 20.
- the fixed electrode portion 10a is an example of the “second electrode portion” in the present invention.
- the charge outflow suppression film 15 is an example of the “second insulating film” in the present invention. This charge outflow suppression film 15 does not hold the charge itself, By bringing the electret film 12 into close contact, it has a function of suppressing the outflow of charges from the electret film 12.
- An insulating film 13 made of SiOC having a thickness of about lOnm to about 1 OOOnm is provided on the surface of the charge outflow suppression film 15.
- the insulating film 13 is formed in a comb-like shape in plan view, like the conductor layer 14 shown in FIG.
- a comb-like conductor layer 14 having a thickness of about 50 to about lOOOnm is formed on the surface of the insulating film 13.
- Other configurations of the second embodiment are the same as those of the first embodiment.
- charge outflow suppression that suppresses the outflow of charges from the surface of the electret film 12 over the entire surface of the electret film 12 that faces the movable electrode portion 20 is performed.
- the electric charge outflow suppression film 15 prevents the electret film 12 force from flowing out of the electric conductor layer 14, and the electric charge outflows from the surface of the electret film 12 where the electric conductor layer 14 is not formed. Can be suppressed. As a result, it is possible to more effectively suppress the decrease in power generation.
- the charge outflow suppression film 15 is formed on the entire surface of the electret film 12, so that the charge outflow suppression film 15 is formed on the surface of the electret film 12. Compared with the case where it is partially formed, it is possible to further suppress the outflow of charges from the electret film 12.
- the electrostatic induction type in which the conductor layer 14 is adjusted to a predetermined positive potential instead of grounding the conductor layer 14, the electrostatic induction type in which the conductor layer 14 is adjusted to a predetermined positive potential.
- the power generation device lb will be described.
- the conductor layer 14 is applied with a voltage 16 of about IV to about 10V.
- the electric potential of the electret film 12 (about 20 V to about 2000 V) is adjusted so as to be the opposite sign potential (about IV to about 10 V).
- the fixed electrode portion 10b is an example of the “second electrode portion” in the present invention.
- Other configurations of the third embodiment are the same as those of the first embodiment.
- the conductor layer 14 has a potential opposite to the potential of the electret film 12.
- the potential difference between the surface potential of the electret film 12 (about 20V to about 2000V) and the conductor layer 14 becomes larger than when the conductor layer 14 is grounded. Therefore, the amount of change in charge induced by electrostatic induction in the movable electrode 22 is larger than that in the case where the conductor layer 14 is grounded. As a result, the amount of power generation can be increased.
- an electrostatic induction power generating device lc in which the width W5 of the conductor layer 14a is larger than the interval W6 between the movable electrodes 22 is used. This will be explained.
- the width W5 (about approx. 1. lm m) is formed to be larger than the interval W6 (about 0.9 mm) between the teeth of the comb-like movable electrode 22.
- the fixed electrode portion 10c is an example of the “second electrode portion” in the present invention.
- the conductor layer 14a is an example of the “first conductor layer” in the present invention.
- the width W5 of the comb-like tooth portion of the conductor layer 14a is set to be larger than the interval W6 between the teeth of the comb-like movable electrode 22. Since the conductive layer 14a formed on the electret film 12 is prevented from entering between the adjacent movable electrodes 22 by forming it so as to be large, it is possible to prevent the movable electrode 22 and the electret film 12 from sticking to each other. Suppressing power S. Thereby, it is possible to suppress a decrease in the charge induced in the movable electrode 22 due to the movable electrode 22 coming into contact with the electret film 12. In addition, with the above configuration, it is possible to suppress the destruction of the electret film 12 due to the contact between the movable electrode 22 and the electret film 12.
- the thickness of the layer in which the insulating film 13 and the conductor layer 14b are stacked is made larger than the thickness of the movable electrode 22. Electrostatic induction The type power generator Id will be described.
- the electrostatic induction power generating device Id in the electrostatic induction power generating device Id according to the fifth embodiment, as shown in FIG. 9, in the fixed electrode portion 10d, the insulating film 13 and the conductor layer 14b formed on the electret film 12
- the thickness tl force of the laminated layers is formed to be larger than the thickness t2 of the movable electrode 22 formed on the lower surface of the movable substrate 21.
- the fixed electrode portion 10d is an example of the “second electrode portion” in the present invention.
- Other configurations of the fifth embodiment are the same as those of the first embodiment.
- the thickness tl of the layer in which the insulating film 13 and the conductor layer 14b are formed on the electret film 12 is formed on the lower surface of the movable substrate 21.
- the thick insulating film 13 and conductor layer 14b function as a spacer, so that the movable electrode 22 and the electret film 12 stick to each other. This can be suppressed.
- two comb-like movable electrodes 22a and 22b are formed on the lower surface of the movable substrate 21.
- the induction type power generator le will be described.
- a comb-like movable electrode 22a and a movable electrode are disposed on the lower surface of the movable substrate 21 in the movable electrode portion 20a.
- the electrodes 22b face each other and are arranged so that the teeth of each other are alternately combined.
- the movable electrode portion 20a is an example of the “first electrode portion” in the present invention.
- the movable electrodes 22a and 22b are examples of the “first electrode” in the present invention.
- the movable electrode 22a and the movable electrode 22b are arranged with an interval of about 30 inches. Further, as shown in FIG.
- the movable electrode 22a and the movable electrode 22b are connected to separate bridge rectifier circuits 2a and 2b, respectively.
- Bridge rectifier circuit 2a and bridge The rectifier circuits 2b are connected to separate DC-DC converters 3a and DC-DC converters 3b, respectively.
- the DC-DC converter 3a and the DC-DC converter 3b are connected to a common load 4 that is driven by the electric power generated by the electrostatic induction generator le.
- Other configurations of the sixth embodiment are the same as those of the first embodiment.
- the movable electrode 22 faces the electret film 12.
- the electrode 22a is induced by electrostatic induction due to the charge accumulated in the electret film 12, and the movable electrode 22b facing the conductor layer 14 is electrically conductive with the charge induced when facing the electret film 12. Since the change in charge with the charge induced when facing the body layer 14 can be output as a current, the charge induction by electrostatic induction and the output of the current are performed simultaneously with one vibration. be able to.
- the power generation amount can be further increased.
- the width W1 of the tooth portion of the comb-like conductor layer 14 is formed larger than the interval W7 between the teeth of the comb-like movable electrode 22a and the movable electrode 22b, thereby obtaining an electret. Since the conductor layer 14 formed on the film 12 is prevented from entering between the adjacent movable electrode 22a and the movable electrode 22b, the movable electrode 22a and the movable electrode 22b are prevented from sticking to the electret film 12. Can be suppressed.
- an electret film 52 having a thickness of 1 m is formed on a silicon substrate 51, and a corona discharge of 10000 V is performed on the electret film 52, and then on the surface of the electret film 52.
- a charge outflow suppression film 55 made of MSQ is formed on the surfaces of the electret film 52 and the conductor layer 54 and on the side surfaces of the insulating film 53.
- the thickness of the insulating film 53 was 0 ⁇ m (no insulating film), 1, 1 m, and 2 ⁇ m.
- the surface potentials of the electret film 42 and the electret film 52 were measured when the width W8 of the tooth portions of the comb-shaped electret film 42 and the comb-shaped conductor layer 54 was changed.
- the potential of the surface of the electret film 52 is measured after the conductor layer 54 is grounded once. did.
- FIG. 14 shows the results of measuring the surface potentials of the electret film 42 and the electret film 52 of the samples shown in FIG. 12 and FIG.
- the vertical axis represents the absolute values of the electric potentials of the electret film 42 and the electret film 52.
- the horizontal axis represents the width W8 of the tooth portions of the comb-shaped electret film 42 and the comb-shaped conductor layer 54.
- the surface potential is higher when the electrode width is lmm, regardless of whether the width W8 of the tooth portion of the conductor layer 54 is 0.1 mm or lmm. Turned out to be.
- the vertical axis represents the absolute value of the potential of the surface of the electret film 52.
- the horizontal axis represents time (days).
- the surface potential decreased with time.
- the amount of decrease in surface potential decreased greatly from the first day to the second day, but decreased gradually after the second day.
- the surface potential was greater when the thickness of the insulating film 53 was 1 Hm and 2 Hm than when O ⁇ m (no insulating film) was used.
- the surface potential is larger in the case of the thickness from the first day to the sixth day, but the sixth day After that, it became almost the same. From the results shown in FIG. 15, it was confirmed that the outflow of charges from the electret film 52 can be suppressed in the case where the insulating film 53 is formed, compared to the case where the insulating film 53 is not formed. .
- FIG. 16 shows a change with time of the surface potential of the sample shown in FIG.
- the vertical axis represents the change in the surface potential of the electret film 52 when the charge amount when the charge is injected into the electret film 52 is 1.
- the horizontal axis represents time (days).
- the present invention is not limited to this, as in the modification shown in FIG.
- the conductor layer 14 and the insulating film 13 are formed by etching, a part of the surface of the electret film 12a is also etched to form the surface of the electret film 12a in an uneven shape, and the insulating film 13 becomes the electret. It may be arranged on the convex part 121 on the surface of the film 12a. .
- the convex portion 121 has a thickness t3 of about 1 nm to about 5000 nm.
- the present invention is not limited to this, and the modification shown in FIG.
- a part of the surface of the charge outflow suppression film 15a is also etched, so that the surface of the charge outflow suppression film 15a is formed in an uneven shape. May be arranged on the convex portion 151 on the surface of the charge outflow suppressing film 15a.
- the charge outflow suppression film 15a is an example of the “second insulating film” in the present invention.
- the convex 151 has a thickness t3 of about 1 nm to about 5000 nm.
- the present invention is not limited to this, and the modification example shown in FIG.
- the insulating film 13 and the conductor layer 14 are formed on the surface of the electret film 12, and the outflow of charge is suppressed on the surface where the insulating film 13 and the conductor layer 14 are not formed on the surface of the electret film 12.
- the film 15b may be formed.
- the charge outflow suppressing film 15b is an example of the “second insulating film” in the present invention.
- the conductive layer 14 formed on the electret film 12 is prevented from entering between the adjacent movable electrodes 22, so that the movable electrode 22 and the electret film 12 can be prevented from sticking to each other. S can. As a result, it is possible to suppress a decrease in the charge induced in the movable electrode 22 due to the movable electrode 22 coming into contact with the electret film 12. In addition, with the above configuration, it is possible to suppress the destruction of the electret film 12 due to the contact between the movable electrode 22 and the electret film 12.
- the force showing an example in which the movable electrode 22 is formed on the lower surface of the movable substrate 21 is not limited to this, and is shown in FIG.
- the movable electrode 22c may be embedded in the lower surface of the movable substrate 21a.
- the movable electrode 21a and the movable electrode 22c are examples of the “first substrate” and the “first electrode” in the present invention, respectively.
- the conductor layer 14 formed on the electret film 12 is adjacent. Therefore, it is possible to prevent the movable electrode 22c and the electret film 12 from sticking to each other.
- the force showing an example in which the movable electrode 22 is formed on the lower surface of the movable substrate 21 is not limited to this, and is shown in FIG.
- an insulating film 23 may be provided on the lower surface of the movable substrate 21, and the movable electrode 22 may be formed on the lower surface of the insulating film 23.
- the insulating film 23 is an example of the “third insulating film” in the present invention. Accordingly, since the movable electrode 22 and the movable substrate 21 are not electrically connected, a conductive substrate made of silicon or a metal plate can be used as the movable substrate 21.
- the force showing an example in which the movable electrode 22 is formed on the lower surface of the movable substrate 21 is not limited to this, and is shown in FIG.
- an insulating film 23a may be provided between the movable substrate 21 and the movable electrode 22.
- the insulating film 23a is an example of the “third insulating film” in the present invention.
- the fixed electrode unit 10 is configured to include the fixed substrate 11, the electret film 12, the insulating film 13, and the conductor layer 14.
- the present invention is not limited to this, and after the conductor layer 17 is formed on the surface of the fixed substrate 70 made of glass or the like, as in the modification shown in FIG. 23, the conductor layer 17 is formed on the surface of the conductor layer 17.
- the electret film 12 may be formed, the insulating film 13 may be formed on the surface of the electret film 12, and the conductor layer 14 may be further formed on the surface of the insulating film 13.
- the fixed substrate 70 is an example of the “third substrate” in the present invention.
- the conductor layer 17 is an example of the “second conductor layer” in the present invention.
- the conductor layer 17 is connected to the movable electrode 22 via the bridge rectifier circuit 2 shown in FIG. Thereby, electrostatic induction can be caused between the conductor layer 16 and the movable electrode 22.
- the conductor layer 17 is formed on the entire surface of the fixed substrate 70 made of glass or the like.
- Power book The invention is not limited to this, and as in the modification shown in FIG. 24, the conductive material is electrically connected to the surface of the fixed substrate 70 made of glass or the like facing the surface where the insulating film 13 of the electret film 12b is not formed.
- the electret film 12b may be formed on the surfaces of the fixed substrate 70 and the conductor layer 17a.
- the conductor layer 17a is an example of the “second conductor layer” in the present invention.
- A is a force showing an example using the fixed substrate 11, the conductor layer 14 and the movable electrode 22 made of the present invention.
- the fixed substrate 11 made of doped silicon, SiC and metal, the conductor layer 14 and the movable electrode 22 may be used.
- Ti, Cu, Ni, W, etc. can be used as the metal.
- the example using the movable substrate 21 made of glass is shown.
- the present invention is not limited to this, and silicon, quartz, plastic, polytetrafluoroethylene (PTFE)
- the movable substrate 21 made of a fluorine resin, a metal plate and SiC represented by (1) may be used.
- silicon and a metal plate are used as the movable substrate 21, it is necessary to provide an insulating film 23 or an insulating film 23a between the movable substrate 21 and the movable electrode 22, as shown in FIGS.
- the force showing an example in which the fixed substrate 70 made of glass is used.
- the present invention is not limited to this, and silicon, quartz, plastic, polytetrafluoroethylene (A fixed substrate 70 made of a fluororesin represented by PTFE) and a metal plate may be used.
- the width W5 of the comb-like tooth portion of the conductor layer 14a is larger than the interval W6 between the teeth of the comb-like movable electrode 22.
- the present invention is not limited to this, and the width of the tooth portion of the comb-shaped movable electrode 22 is the width between the teeth of the comb-shaped conductor layer 14a. You may comprise so that it may become larger.
- the change in the charge induced by the electrostatic induction in the movable electrode 22 becomes a current, which passes through the bridge rectifier circuit 2 and the DC-DC converter 3. Force showing an example output to the load 4
- the present invention is not limited to this, and the current may be output to the load 4 via the bridge rectifier circuit 2, or the current may be output via the DC-DC converter 3.
- the load 4 may be output.
- the force is shown in which the conductor layer 14 is grounded or a predetermined voltage is applied.
- the present invention is not limited to this. It may be in a floating state in which neither ground nor voltage is applied.
- the force shown in the example using the comb-like conductor layers 14 and 14a and the comb-like movable electrodes 22, 22a and 22b is not limited to this, and may be any shape that causes a difference in the amount of charge induced on the surface of the movable electrode due to the vibration of the movable electrode!
- examples using electret films 12, 12a, and 12b made of a fluorine-based resin typified by polytetrafluoroethylene (PTFE) or a silicon oxide film are used. Power shown
- the present invention is not limited to this, and any material that functions as an electret may be used.
- the present invention is applied to an electrostatic induction power generating device that is an example of an electrostatic operation device.
- the present invention is not limited to this, The present invention may be applied to electrostatic operation devices other than electrostatic induction power generation devices such as electrostatic actuators.
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008542076A JP5081832B2 (ja) | 2006-10-30 | 2007-10-26 | 静電動作装置 |
US12/513,005 US8102097B2 (en) | 2006-10-30 | 2007-10-26 | Electrostatic acting device including an electret film |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006-293559 | 2006-10-30 | ||
JP2006293559 | 2006-10-30 | ||
JP2007076872 | 2007-03-23 | ||
JP2007-076872 | 2007-03-23 |
Publications (1)
Publication Number | Publication Date |
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WO2008053793A1 true WO2008053793A1 (fr) | 2008-05-08 |
Family
ID=39344134
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/070883 WO2008053794A1 (fr) | 2006-10-30 | 2007-10-26 | Dispositif à actionnement électrostatique |
PCT/JP2007/070876 WO2008053793A1 (fr) | 2006-10-30 | 2007-10-26 | Dispositif à actionnement électrostatique |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2007/070883 WO2008053794A1 (fr) | 2006-10-30 | 2007-10-26 | Dispositif à actionnement électrostatique |
Country Status (4)
Country | Link |
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US (2) | US8102097B2 (ja) |
JP (2) | JP5081832B2 (ja) |
CN (1) | CN101529712B (ja) |
WO (2) | WO2008053794A1 (ja) |
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Publication number | Priority date | Publication date | Assignee | Title |
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WO2010047076A1 (ja) * | 2008-10-23 | 2010-04-29 | パナソニック株式会社 | エレクトレット電極、それを用いたアクチュエータ、振動発電器、および振動発電装置、ならびに振動発電装置を搭載した通信装置 |
US8288917B2 (en) | 2008-10-23 | 2012-10-16 | Panasonic Corporation | Silicon oxide electret electrode with laminate insulating film surrounding short conductive film |
JP5411871B2 (ja) * | 2008-10-23 | 2014-02-12 | パナソニック株式会社 | エレクトレット電極、それを用いたアクチュエータ、振動発電器、および振動発電装置、ならびに振動発電装置を搭載した通信装置 |
US8933611B2 (en) | 2009-06-26 | 2015-01-13 | Panasonic Intellectual Property Management Co., Ltd. | Vibration power generator, vibration power generating device and communication device having vibration power generating device mounted thereon |
JP2012207690A (ja) * | 2011-03-29 | 2012-10-25 | Kyb Co Ltd | 発電装置を備えた緩衝器 |
WO2013132753A1 (ja) * | 2012-03-07 | 2013-09-12 | パナソニック株式会社 | 振動発電器及び振動発電装置と、振動発電装置を搭載した通信装置及び電子機器 |
US8710712B2 (en) | 2012-03-07 | 2014-04-29 | Panasonic Corporation | Vibration power generator and vibration power generation device, and communication device and electronic equipment with vibration power generation device |
WO2013136691A1 (ja) * | 2012-03-16 | 2013-09-19 | パナソニック株式会社 | 発電装置、およびそれを用いた電気機器 |
JPWO2013136691A1 (ja) * | 2012-03-16 | 2015-08-03 | パナソニックIpマネジメント株式会社 | 発電装置、およびそれを用いた電気機器 |
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Also Published As
Publication number | Publication date |
---|---|
US8089194B2 (en) | 2012-01-03 |
US20100109472A1 (en) | 2010-05-06 |
JPWO2008053794A1 (ja) | 2010-02-25 |
JP5081832B2 (ja) | 2012-11-28 |
US8102097B2 (en) | 2012-01-24 |
JP5081833B2 (ja) | 2012-11-28 |
CN101529712A (zh) | 2009-09-09 |
WO2008053794A1 (fr) | 2008-05-08 |
US20100052469A1 (en) | 2010-03-04 |
JPWO2008053793A1 (ja) | 2010-02-25 |
CN101529712B (zh) | 2012-06-27 |
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