WO2014056472A1 - Actionneur spiral diélectrique - Google Patents

Actionneur spiral diélectrique Download PDF

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Publication number
WO2014056472A1
WO2014056472A1 PCT/DE2013/000555 DE2013000555W WO2014056472A1 WO 2014056472 A1 WO2014056472 A1 WO 2014056472A1 DE 2013000555 W DE2013000555 W DE 2013000555W WO 2014056472 A1 WO2014056472 A1 WO 2014056472A1
Authority
WO
WIPO (PCT)
Prior art keywords
core
film
polymer
polymer film
roller actuator
Prior art date
Application number
PCT/DE2013/000555
Other languages
German (de)
English (en)
Inventor
Christian Graf
Jürgen MAAS
Thorben Hoffstadt
Dennis Cording
Original Assignee
Hochschule Ostwestfalen-Lippe
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hochschule Ostwestfalen-Lippe filed Critical Hochschule Ostwestfalen-Lippe
Publication of WO2014056472A1 publication Critical patent/WO2014056472A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/80—Constructional details
    • H10N30/88—Mounts; Supports; Enclosures; Casings
    • H10N30/886—Mechanical prestressing means, e.g. springs
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/01—Manufacture or treatment
    • H10N30/05—Manufacture of multilayered piezoelectric or electrostrictive devices, or parts thereof, e.g. by stacking piezoelectric bodies and electrodes
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/50—Piezoelectric or electrostrictive devices having a stacked or multilayer structure
    • H10N30/506—Piezoelectric or electrostrictive devices having a stacked or multilayer structure of cylindrical shape with stacking in radial direction, e.g. coaxial or spiral type rolls
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/80—Constructional details
    • H10N30/85—Piezoelectric or electrostrictive active materials
    • H10N30/857—Macromolecular compositions

Definitions

  • the invention relates to a dielectric roller actuator.
  • Actuators as transducers or drive elements are known and proven in various embodiments. Actuators convert electrical signals into mechanical movements or other physical quantities. Opposite, for example, inductively operating electric motors or hydraulic or
  • Pneumatic actuators which have comparatively large travel ranges, have bimetallic actuators or piezo actuators a comparatively short travel.
  • Capacitor structure with variable capacitance arises, for example, in a voltage-controlled
  • Oscillator circuit or in an impedance-traveling circuit can be used.
  • Electroactive polymers exhibit similar behavior as, for example, piezoelectric ceramics, but the change in shape is due to the application of an electrical current
  • actuators made of polymer films or films of electrically active polymers which are often referred to as artificial muscles, in which the electrode-enclosed polymer films or foils react to the application of an electrical voltage with a change in shape or in a change in shape and concerns a tension this so that they can be used in many ways as actuators or as sensors.
  • Such films can, suitably biased, upon application of a voltage in particular in a
  • roller actuator according to the invention has a number of advantages. In particular, it is easy to manufacture manufacturing technology. Furthermore, the roller actuator according to the invention consists exclusively of plastics, apart from the electrode, which may be of graphite, for example. On copper, with the possible exception of the electrical connections, and other metals, is completely dispensed with. Nevertheless, by the core is sufficient
  • roller actuator according to the invention has various advantages. As in the winding of the
  • Polymer film can be avoided, as will be explained in more detail. If the polymer films are applied to the prestressed core and this is relaxed, biaxial pre-stretching of the polymer films takes place automatically.
  • Another advantage is the double-sided coating of a polymer film with electrodes, which ensures that between the electrodes is only the polymer film forming a dielectric. Air pockets are safely avoided. The electrical insulation of the electrodes
  • the insulating polymer film likewise has electrically active polymers, this measure has the further advantage that two active layers of the electroactive polymer are formed in one revolution during winding since a capacitance is likewise formed by the polymer film used for the insulation with the electrode of the preceding layer becomes.
  • roller actuator works extremely energy-efficient, since essentially only one charge exchange takes place during an action.
  • the material for the core is basically any elastomer, but preferably is a silicone, polyurethane, acrylic or rubber.
  • the core may also be made of an electroactive
  • An advantage of this embodiment is the axial shortening of the core when the layers of polymer films are subjected to an electrical charge.
  • Actuator can be specified according to the invention.
  • polyurethane which should be in terms of capacitive properties of the lowest possible layer thickness.
  • the two are further
  • Polymer films consisting of the same material, so that the polymer films have the same physical properties and in particular have the same coefficients of expansion, so that between the films no tensions can occur.
  • materials are offered, comparable to the core of an elastomer, silicone, acrylic or rubber. This especially against the background that the
  • Polymer films are elastically connected to each other, eg.
  • Such a film composite can be produced easily if it is provided that a longitudinally folded film of an electroactive material is used, one of which
  • Half of the polymer film provided with electrodes and the other longitudinal half forms the insulating polymer film.
  • an electrode is applied to a longitudinal half of the film twice the width of the film composite, the film being centered along the electrode
  • the second electrode is applied to the outside, opposite the first electrode.
  • the reliability of the roller actuator according to the invention can be further increased by the measure, if it is provided that in the circumferential direction of the winding of the polymer film on both sides of a corresponding plurality of
  • the operational safety can be increased by the measure that it is provided that the electrical connection takes place at a point of a reduced electrode cross section.
  • a fuse is installed as it blows in the event of a short circuit on one of the isolated electrodes, so that the defective part of the
  • Roller actuator is electrically separated and its function is otherwise given by the way.
  • the film composite is applied to an axially biased core made of an elastomer.
  • Such an elastic core will deform when applying a force for the bracing. A bending can be prevented if an axial, central opening of the core is penetrated by a rod on which the core is axially biased and then wound on the thus axially biased core of the film composite.
  • the core is bordered axially by caps on the core or radially penetrated by pins and that act on the caps or on the pins, the axial stress inducing forces.
  • FIG. 5 shows a finished roller actuator according to the invention
  • FIG. 1 shows a film made of an electroactive polymer for the production of a film composite
  • FIG. 5 shows a finished roller actuator according to the invention
  • FIG. 1 shows a film made of an electroactive polymer for the production of a film composite
  • FIG. 5 shows a finished roller actuator according to the invention
  • FIG. 1 shows a film made of an electroactive polymer for the production of a film composite
  • FIG. 7 shows a side view of the film composite according to FIG. 6, FIG.
  • Fig. 10 a detail in a plan view a
  • Fig. 12 a section acc. Fig. 11 with activated
  • FIG. 1 shows a polymer film 1, for example made of a polyurethane.
  • This polymer film 1 is, above and below, each provided with an electrode 2.3, wherein peripherally serving an electrical insulation edge 4 remains.
  • two copper adhesive tapes 5, 6 are provided, which protrude tangentially here by way of example, with reference to the finished roller actuator.
  • prestressed core 9 acc. Figure 4 can be wound.
  • this core 9 made of an elastomer such as a silicone,
  • Polyurethane, acrylic or rubber is attached to the winding of the film composite 8, in particular glued to this elastic.
  • Bias of the core 9 is such that the of the
  • pre-stretched film composite 8 outgoing forces are supported.
  • These stresses essentially cause forces in the axial direction of the roller actuator 10, so that when an electrical voltage is applied to the copper adhesive tapes 5, 6, the axial change in length of the roller actuator 10 is determined by the pre-stretched film composite 8.
  • FIG. 6 shows a film 11 made of an electroactive polymer.
  • a first longitudinal half 12 of the film 11 is a first longitudinal half 12 of the film 11 .
  • Electrode 13 applied. Again, an electrically insulating edge 14 is provided circumferentially again.
  • Longitudinal half 15 of the film 11 is folded around the center line 16 on the provided with the electrode 13 flat side 17 of the first longitudinal half 12 and bonded elastically.
  • This second longitudinal half 15 forms the insulating polymer film of the Foil composite 18 from, see. Fig. 7.
  • the second electrode 20th On the flat side 17 with electrode 13 opposite flat side 19 of the first longitudinal half 12, the second electrode 20th
  • FIG. 8 against a braking force according to FIG. Arrow 23 wound, the second extension of the
  • the rod 22 is arranged as an axis, alternatively the core axially end caps or radially passing pins on the axis of a motor.
  • Foil composite then takes place against a preferably
  • the motor may for example be firmly flanged to a support, while the counter-bearing of the axle is designed to be axially adjustable in order to clamp the core axially.
  • the bonding of a film composite to the core, as well as the individual windings of the film composite with each other, can be made over the entire surface, if the adhesive is sufficiently elastic. Alternatively, it can be provided that only one thin strip of adhesive is applied to the edges of the inactive areas. This avoids that the axial movements are inhibited by too large glued surfaces.
  • Figure 10 shows a polymer film 25 for another
  • Embodiment of a rolling actuator This polymer film 25 is provided on both flat sides in the circumferential direction with a plurality of individual electrodes 26,27. The electric
  • Copper adhesive tapes 28, 29 do not contact the electrodes 26, 27 directly, but via points 30, 31 of reduced electrode cross-sections. In the case of a short circuit via one of the individual electrodes 26, 27, the corresponding point 30, 31 of the reduced electrode cross-section will melt and thus the corresponding individual electrodes 26, 27, as it were
  • the section through the actuator 36 shows a core 37 of a plurality of stacked, radially extending electrically active polymer films 38. Radially outward, a roller actuator 40 of the type described above surrounds the core 37.
  • the individual layers of the polymer films 38 are axially spaced by electrodes 39, 40 which have alternating polarity and which lie radially outward through contacts 42, 43

Abstract

L'invention concerne un actionneur spiral diélectrique (10) de forme cylindrique, ayant une course de réglage axiale et comprenant un noyau (9), de section ronde dans un état non chargé et déformable sous charge, sur lequel est déposé en spirale, avec une précontrainte axiale, un enroulement en composite stratifié (8) étiré constitué d'un film (1) en polymère électroactif, comportant au moins deux électrodes (2, 3) électriquement séparées les unes des autres par le film polymère (1), ainsi qu'un autre film polymère (7) électriquement isolant. Un perçage axial central (24) du noyau (21) peut être traversé par une tige (22) sur laquelle le noyau (21) est précontraint axialement et le composite stratifié (18) est ensuite bobiné sur le noyau (21) précontraint axialement.
PCT/DE2013/000555 2012-10-10 2013-10-01 Actionneur spiral diélectrique WO2014056472A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012019860.4 2012-10-10
DE102012019860.4A DE102012019860A1 (de) 2012-10-10 2012-10-10 Dielektrischer Rollenaktor

Publications (1)

Publication Number Publication Date
WO2014056472A1 true WO2014056472A1 (fr) 2014-04-17

Family

ID=49515137

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2013/000555 WO2014056472A1 (fr) 2012-10-10 2013-10-01 Actionneur spiral diélectrique

Country Status (2)

Country Link
DE (1) DE102012019860A1 (fr)
WO (1) WO2014056472A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018093467A (ja) * 2016-11-25 2018-06-14 住友理工株式会社 静電型トランスデューサおよびその製造方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014010256A1 (de) 2013-09-14 2015-03-19 Hochschule Ostwestfalen-Lippe Wandler mit wenigstens einem aktivierbaren Polymerfilm aus einem elektroaktiven Polymer
DE102022104179A1 (de) 2022-02-22 2023-08-24 Technische Universität Dresden, Körperschaft des öffentlichen Rechts Lautsprecher und Verfahren

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004079832A2 (fr) * 2003-03-03 2004-09-16 Sri International Polymeres electroactifs lamines
JP2008251833A (ja) * 2007-03-30 2008-10-16 Tokai Rubber Ind Ltd アクチュエータおよびアクチュエータ集束体
DE102007024901A1 (de) 2007-05-29 2008-12-11 Siemens Ag Kondensatorstruktur mit veränderbarer Kapzität und Verwendung der Kondensatorstruktur
DE102007059858A1 (de) 2007-12-12 2009-06-18 Bayer Materialscience Ag Energiewandler hergestellt aus filmbildenden wässrigen Polymer-Dispersionen, insbesondere Polyurethan-Dispersionen
WO2010000261A1 (fr) 2008-06-09 2010-01-07 Danfoss A/S Transducteur comprenant un matériau composite et procédé de fabrication dudit matériau composite

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5559387A (en) * 1994-05-13 1996-09-24 Beurrier; Henry R. Piezoelectric actuators
EP1540807B1 (fr) * 2002-09-20 2013-01-09 Danfoss A/S Actionneur en elastomere et procede de fabrication dudit actionneur
EP1919071B1 (fr) * 2006-11-03 2011-04-27 Danfoss A/S Composite diélectrique et procédé de fabriation d'un composite diélectrique
JP5247123B2 (ja) * 2007-11-15 2013-07-24 豊田合成株式会社 アクチュエータ
EP2161758A1 (fr) * 2008-09-05 2010-03-10 Flexucell ApS Cellule solaire et son procédé de fabrication
JP2012065426A (ja) * 2010-09-15 2012-03-29 Toyoda Gosei Co Ltd アクチュエータの製造方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004079832A2 (fr) * 2003-03-03 2004-09-16 Sri International Polymeres electroactifs lamines
JP2008251833A (ja) * 2007-03-30 2008-10-16 Tokai Rubber Ind Ltd アクチュエータおよびアクチュエータ集束体
DE102007024901A1 (de) 2007-05-29 2008-12-11 Siemens Ag Kondensatorstruktur mit veränderbarer Kapzität und Verwendung der Kondensatorstruktur
DE102007059858A1 (de) 2007-12-12 2009-06-18 Bayer Materialscience Ag Energiewandler hergestellt aus filmbildenden wässrigen Polymer-Dispersionen, insbesondere Polyurethan-Dispersionen
WO2010000261A1 (fr) 2008-06-09 2010-01-07 Danfoss A/S Transducteur comprenant un matériau composite et procédé de fabrication dudit matériau composite

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018093467A (ja) * 2016-11-25 2018-06-14 住友理工株式会社 静電型トランスデューサおよびその製造方法

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Publication number Publication date
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