DE102009054035A1 - Energy transformer with electroactive polymer film body - Google Patents

Abstract

The invention relates to an energy transformer (5) with an electroactive polymer film body (1). The energy transformer (5) has a multi-layer electroactive polymer film (4) with an electrode (6) and a counter electrode (7) of a mechanically flexible capacitor (8). The multilayer electroactive polymer film (4) has a flat-wound electroactive polymer film tape (9). The electroactive polymer film tape (9) has an electrode structure (10, 11) of the electrode (6) and the counter electrode (7) of a capacitor (8) arranged on one side of the tape. The electrode (6) and the counterelectrode (7), after winding and folding the electroactive polymer film strip (9) into a flat-wound electroactive polymer film body (1), form mutually opposite electrodes (6, 7) with an electroactive polymer film material (12) arranged between them.

Description

The invention relates to an energy transformer with an electroactive polymer film body. The energy transformer has a multilayer electroactive polymer film with an electrode and a counterelectrode of a mechanically flexible capacitor.

From the publication DE 60 2004 008 639 T2 a wave energy transformer is known, where in a floating body carries a connecting element which slides up and down with the swell and generates corresponding electrical energy in a coil surrounding the connecting element.

From the publication US 2007/0257490 A1 For example, a system and method for utilizing an electroactive polymer transformer to convert mechanical energy originally contained in one or more waves into electrical energy is known. For this purpose, the transformer has a marine device that converts the mechanical energy of a wave into mechanical energy, which is suitable as an input for an electroactive polymer transformer.

Also from this document, a floating body is known, which is partially connected to submerged masses or anchored directly on the seabed. The floating body carries a plurality of containers in which moving masses perform mechanical movements synchronously with the waves and thus transform mechanical energy of the waves into kinetic energy, which is applied to an electroactive polymer transformer for generating electrical energy.

Such an electroactive polymer transformer has an electroactive polymer film, on the top side of which an electrode and on the underside of which a counterelectrode of a capacitor are arranged. Upon expansion, curvature, or other deformation of the electroactive polymer material, the capacitance of the capacitor, electrode, counter electrode, and interposed polymer film varies, so that electrical energy can be obtained from mechanical deformation of the polymer material in a suitable generator circuit.

If the electroactive polymer is stretched by a mechanical energy transmission system due to the waves at low electric field strength, the electric field strength increases. The increased electric field strength is maintained as the electroactive polymer film relaxes, and can deliver electrical energy to an intermediate capacity or charge battery in the relaxation phase of the film. For this purpose, the wave energy transformer has at least one position sensor which detects the reversal positions of the expansion phase in the relaxation phase and vice versa and signals a change in position to a corresponding control unit of the generator.

A disadvantage of the known wave energy transformers is their relatively complex and material-intensive structure, according to the device according to DE 60 2004 008 639 T2 requires a high cost of copper coils to transform an up and down movement of a connecting element, which is in communication with a floating body, into electrical energy. In the from the publication US 2007/0257490 A1 known wave energy exchanger with an electroactive polymer transformer elaborate film-like structures are known to connect a floating body via appropriate connecting elements with the electroactive polymer film such that the mechanical energy of the waves can be transferred to the electroactive polymer material, so that the electroactive polymer material in position is to deliver electrical energy to a load or a rechargeable battery by means of a generator circuit.

From the publication EP 1 212 800 D1 In addition, there is known a generator for converting mechanical energy to electrical energy, wherein at least two electrodes are disposed in a polymer in a manner such that a change in the electric field occurs in response to a deflection applied to a first portion of the polymer. Furthermore, different structures and arrangements of the electrodes with respect to the electroactive polymer material are known, wherein, inter alia, it is proposed to roll up an electroactive polymer film into a wound capacitor.

A disadvantage of this wound capacitor, however, is that it is constructed cylindrically according to conventional wound capacitors and thus only to a limited extent unfolds its full effect, for example, in pure stretching of the electroactive polymer material, but for bending, curvature and other deformations has a reduced efficiency.

The object of the invention is to provide an energy transformer, which has a simplified and less expensive winding structure and in bending, bending and other movement-dependent deformations has a relation to the prior art improved shape.

This object is achieved with the subject matter of the independent claims. advantageous Further developments of the invention will become apparent from the dependent claims.

According to the invention, an energy transformer, preferably a wave energy transformer with an electroactive polymer film body is provided. The energy transformer has a multilayer electroactive polymer film with an electrode and a counterelectrode of a mechanically flexible capacitor. The multilayer electroactive polymer film has a flat-wound electroactive polymer film ribbon. The electroactive polymer film strip has an electrode structure, arranged on one side of the strip, of the electrode and the counter electrode of a capacitor. The electrode and counterelectrode, upon winding to fold the electroactive polymer film ribbon into a flat-wound electroactive polymer film body, form opposing electrodes with electroactive polymer film material interposed therebetween.

Such a flat-wound flexible capacitor with an electroactive polymer film material as a dielectric has the advantage of a variable capacitance, which depends on the degree of deformation of the flexible capacitor. As a result of the electrode structure for the electrode and counterelectrode of the capacitor, which is discussed in greater detail below, a flat wound flexible capacitor is provided that can be advantageously used in energy transformers to supply electrical energy from the mechanical deformation energy of the flexible capacitor when supported by a corresponding generator circuit win.

It is of particular advantage that the electrodes are arranged on one side on a polymer film strip, which simplifies the manufacturing process of such a flat-wound capacitor and designed cost-effective. In addition, with the flat-wound capacitor, a generator of electroactive polymer material is created, the stacked and arbitrarily large electrode surfaces together and can convert into corresponding impressed by swell mechanical bending in one or two-sided clamping into electrical energy. In addition, it is possible to connect edge strips of this flat-wound capacitor, which in one embodiment of the invention have no electrode material, to a reinforcing structure in order to stabilize the edge strips via this reinforcing structure and to prepare them for clamping or screwing the flexible capacitor into corresponding holders ,

In one embodiment of the invention, the electrode and the counterelectrode of the electrode structures are arranged combingly intermeshing on the common side of the electroactive polymer film strip, wherein an uncoated fold is provided transversely to the longitudinal direction of the electroactive polymer film strip. This uncoated fold forms a surface that forms the end faces of the wound flat capacitor when winding the polymer film strip. Since the required surfaces for the end faces increase from the inside to the outside, the uncoated folds are formed wider with increasing electrode position for the wider end faces.

In a further embodiment of the invention, in each case two identical electrode surfaces of the electrode structure are arranged side by side on the side of the electroactive polymer film strip coated with electrode material. They have at the folding point on a narrow connecting web, which brings them electrically connected to each other. Thus, the fold is not completely free of electrode material since this tie bar is required for the function of the flat wound flexible capacitor.

In addition, the electrode material of the counterelectrode leads past the electrode surfaces of the counterelectrode arranged next to one another in a narrow conductor web, so that even in the region of the fold there is a narrow web of electrode material. This special structure will be explained in more detail with reference to the later figures.

By another modified electrode structure on the common, coated with the electrode and the counter electrode side of the electroactive polymer film tape, an embodiment is provided in which not only the flat sides are coated with electrode material, but at least one of the end faces of the flat wound capacitor electrode material. For this purpose, no longer two identical electrode surfaces are provided next to each other interrupted by a fold in the comb structure, but rather now also electrode material is deposited in the fold, so that the comb structure has large-area electrodes and counter-electrodes alternately and behind each other.

During the subsequent winding up of the electroactive polymer film strip, the folding surface is thus provided with coated electrode material at the folds and thus at least one end side, so that U-shaped electrodes stack into one another in the flat wound capacitor. This has the advantage that the capacity can be further increased without the need for additional electroactive polymer film material.

In a further embodiment of the invention, it is provided that the electroactive polymer film strip has a marginal strip with reinforcing material which is insulating and mechanically fixed in the wound state on one side or both sides of the generator and exposed to the capacitance variation of a bending force with unilateral or bilateral fixation of the wound reinforced edge strip can be. This edge strip can be stiffened by glass fibers or ceramic filler particles such that a final compression of a relatively stable end of the clamped capacitor can be achieved, in which, for example, openings for fixing the capacitor can be introduced into a holder. Such chucking elements which may engage apertures of the wound reinforced edge strip are screws, rivets or staples.

For energy recovery, the reinforced, wound ends of the electroactive polymer film may be subjected to stretching for capacitance variation. It is advantageous if, for example, in a wave energy plant, the polymer film is biased by means of the reinforced edge strips before being exposed to the changing loads caused by the waves.

With the help of the reinforced ends, the electroactive polymer film can be arranged in a linkage, the tensile and compressive forces of a wave is placed. In this case, the linkage is preferably designed as a lattice structure that rides on the waves and induced by the swell pressure and tensile forces in the bars of the lattice structure. By arranging a flat-wound capacitor according to the invention in the grid bars thus high capacity variations can be achieved by the waves and thus an effective energy production can be realized with the help of the waves.

In a further embodiment of the invention, the variable capacitance of the flat-wound electroactive polymer film interacts with a generator. This generator has a generator circuit, a supply battery, an intermediate capacitor and a control unit, wherein the control unit transmits charges on the intermediate capacitor depending on the wave and / or charges a charging battery and / or feeds a load such as a power supply network. However, in order to introduce the energy into the network, further electronic circuits are required, such as a frequency converter, which also has an intermediate capacity in its intermediate circuit and ensures that the low frequency of the wave is reflected in the frequency of the network at 50 or 60 Hz. transferred.

Thus, a generator for converting mechanical wave energy into electrical energy is possible, which has a high efficiency due to the energy transformer according to the invention. In addition, with the help of the wave energy transformer, a wave energy plant can be operated with a plurality of wave energy transformers, which work as wave followers and which can be distributed over a large sea surface with a correspondingly high wave stroke and which follow the movements of the waves individually. Such wave followers are also called "point absorbers" in contrast to tidal power plants, in which not single wave followers are distributed on large sea surfaces, but where the incoming water is collected at high tide in catch basins and is discharged at low tide on turbines.

A process for producing a multilayer electroactive polymer film body of an energy transformer has the following process steps. First, an electroactive polymer film ribbon made of an electroactive polymer is prepared. This is followed by a one-sided coating of the electroactive polymer film strip having an electrode structure and a counter-electrode structure, the structures meshing without touching each other and the electrode surfaces and the counter-electrode surfaces are larger than the interposed folding surfaces, which are required to subsequently allow the winding. Finally, folding the electroactive polymer film ribbon to form a flat-wound multilayer electroactive polymer film body.

This method has the advantage that only on one side the electrode structures are applied to the electroactive polymer film tape and a coating can be omitted from the bottom. At the same time it also has the advantage that no insulating intermediate layers are to be stored in the winding of the flat flexible capacitor, so that not only the cost of such insulating films can be saved, but also the space requirement is reduced.

When performing the method, no electrode structure is provided on the electroactive polymer film strip in the folding surfaces, but only narrow line webs and narrow connecting webs. Thus, out of these fold surfaces, the width of the end faces of the flat-wound electroactive polymer film body and the large-area electrodes of the comb structure will form the broad sides of the electroactive flat wound polymer film body.

In a modification of the method are on edge sides of the electroactive Polymer film belt mechanical reinforcing materials applied to edge strips. Subsequently, the mechanical reinforcing material is compacted on the marginal strip into clamping elements, after a flat-wound electroactive polymer film body has been formed by winding under folding of the electroactive polymer film strip and thus there is also a reinforced edge strip for compacting. The compaction is performed at elevated pressure and elevated temperature to provide a reinforced edge zone that allows the flat wound capacitor to be clamped into the various mechanical wave energy harvesting devices.

The invention will now be explained in more detail with reference to the following figures.

1 shows a schematic cross section of an electroactive polymer film strip with one-side applied electrode structure for a polymer film body of a wave energy transformer according to a first embodiment of the invention;

2 shows a schematic cross section of the electroactive polymer film strip according to 1 after being wound up into a flat wound polymer film body by folding along folds.

3 shows a schematic perspective view of an upper side of the polymer film strip according to 1 with an applied electrode structure;

4 shows a schematic cross section of an electroactive polymer film strip with one-sided applied electrode structure for a polymer film body for a wave energy transformer according to a second embodiment of the invention;

5 shows a schematic cross section of the electroactive polymer film strip according to 4 after being wound up into a flat wound polymer film body by folding along folds;

6 shows a schematic perspective view of the top of the polymer film strip according to 4 with an applied electrode structure;

7 shows a schematic perspective view of an upper side of a polymer film ribbon for a polymer film body according to a third embodiment of the invention;

8th shows a schematic partially sectioned perspective view of a polymer film body according to the third embodiment of the invention;

9 shows a schematic sketch of a wave energy generator using a wave energy transformer according to one of the three embodiments of the invention mentioned.

1 shows a schematic cross section of an electroactive polymer film ribbon 9 with one-sided applied electrode structure 10 for a polymer film body 1 a wave energy transformer according to a first embodiment of the invention. The electroactive polymer film tape 9 is from an electroactive polymer film 4 produced. On the top 13 of the electroactive polymer film tape 9 is an electrode structure 10 applied, which may for example consist of carbon particles or other metallic conductive particles, which are introduced close to the surface in the electroactive polymer film as a filler, so that they can move with the polymer film, without losing any electrical contact with each other. Preferably, carbon nanotubes are also used for these applications, which because of their high flexibility and flexibility and fine distribution in the near-surface region of the host material are capable of stretching and bending the highly flexible electroactive polymer film 4 to follow and stay electrically in contact with each other.

The polymer film 4 is already in electroactive polymer film tapes for this application 9 cut, with the top 13 Electrode-bearing areas for the electrodes 6 and the counter electrodes 7 as well as in electrode-free folds 14 is prepared. In 1 the folding points are marked with arrows, the folding surfaces 36 As the length of the electroactive polymer film ribbon increases, there is a 90 ° bend at the folds 14 when winding up the electroactive polymer film belt 9 sure.

Like the next one 2 shows, when winding the electrode-free folding surfaces 36 to corresponding end faces, which increase with each winding.

The in 1 For clarity, the cross-section shown is exaggerated in thickness for both the electroactive polymer film 4 as well as for the electrode structure 10 drawn. The electrode structure 10 has a thickness of a few microns, while the thickness of the electroactive polymer film 4 a few 10 microns. To the change of electrodes 6 and counter electrodes 7 also in the later figures, the electrode is marked with a + and the counter electrode with a -, but these are not necessarily polarities or Potentials found in the electroactive polymer film body 1 form.

Here are the electrodes 6 with a first contact and the counter electrodes 7 connected to a second contact. As 1 shows alternate electrodes and counter electrodes, starting from the beginning section of the polymer film tape 9 according to the scheme "++ - ++ -..." etc. from. The initial section forms the first, innermost layer of the wound polymer film body 1.

2 shows a schematic cross section of the electroactive polymer film ribbon 9 after winding under folding of the polymer film strip 9 to a flat wound electroactive polymer film body 1 , In the embodiment according to 2 shows the wound flat electroactive polymer film body 1 twelve layers of electrodes, which are opposite to each other, however, this number can be arbitrarily reduced and arbitrarily increased, depending on the load size and the required elasticity and compliance to mechanical deformations, which is a prerequisite for the generation of charge carriers in the use of such electroactive polymer materials for energy is crucial.

2 shows in this cross section that the folding surfaces 36 and thus the front surfaces 37 in this flat wound electroactive polymer film body 8th free of electrode material in the illustrated schematic cross section through the center of the electroactive polymer film body 1 are. In the peripheral areas there are namely strip conductors and connecting webs. This becomes clearer with the following 3 ,

3 shows a schematic perspective view of an upper side 13 of the polymer film tape 9 according to 1 with an applied electrode structure 10 , Again, the folds 14 marked with arrows. The folding surfaces 36 are largely free of electrode material, but by the comb structure 38 , with which the two electrodes interlock without touching each other, are in the edge region on the one hand connecting webs 17 between the same electrode surfaces and conductor webs 18 , which are far apart electrode surfaces of the comb structure 38 connect with each other. This electrode structure 10 has the advantage that the folding surfaces 36 the size of the faces can be adjusted. Furthermore, it has the advantage that both the electrode 6 as well as the counter electrode 7 can be contacted after winding by folding without problems.

4 shows a schematic cross section of an electroactive polymer film ribbon 9 with one-sided applied electrode structure 11 for a polymer film body 2 a wave energy transformer according to a second embodiment of the invention. Components having the same functions as in the previous figures are identified by the same reference numerals and will not be discussed separately.

The difference to that in the 1 to 3 shown first embodiment of the electroactive polymer film body 8th is that large-area individual electrodes 6 and single counter electrodes 7 alternate in the comb structure, whereby now one of the two end faces of the flat-wound electroactive polymer film body is provided with electrode material in layers on winding. Thus, the effective capacitor area is significantly increased with the same space requirements without additional material consumption.

In the in 5 shown schematic cross section of the electroactive polymer film tape 9 after being wound up into a flat wound electroactive polymer film body 2 are now the electrode 6 and the counter electrode 7 U-shaped and nested in the electroactive flat wound polymer film body 2 arranged. Again, in this illustration, the electrodes 6 with a + and the counter electrodes 7 each with a - marked to more clearly the structure of the polymer film body 3 emphasized.

6 shows a schematic perspective view of an upper side 13 of the polymer film tape 3 according to 4 with an applied electrode structure 11 , This structure eliminates the short connecting webs 17 , Only the relatively long strip conductors 18 the comb structure 38 are present to the large-area electrodes 6 and counter electrodes 7 in the comb structure 38 connect to. As 6 clearly shows, are now also electrode material at a few folds 14 namely, where end faces of the wound electroactive polymer film body 2 according to 5 To have electrodes. Therefore, both the counter electrode material 7 as well as the electrode material 6 when winding up the electroactive polymer film body 8th folded or folded by about 90 ° to the in 5 To achieve the structure shown.

7 shows a schematic perspective view of an upper side 13 a polymer film tape 9 for an electroactive polymer film body 3 according to a third embodiment of the invention. In this embodiment of the invention edge strips 19 with a reinforcing material 20 coated, which essentially comprises fiber materials, in order to create a possibility at the edge strips, stretching forces, torsional moments or Induce bending forces in the electroactive polymeric material. The structure of the electrode 6 and the counter electrode 7 corresponds to the electrode structure 10 as they are already in 3 was shown.

Will such in 7 shown electroactive polymer film tape at the folds 14 folded or folded during winding and wound up into a flat bobbin, this results in the 8th shown half of an electroactive polymer film body 3 with a polymer film capacitor 8th and reinforcing material 20 having chucks 23 with which the polymer film body can be mounted between different holders, for example, to bend, bend, twist and / or stretch it. This is in the embodiment according to 8th on each end region one half of the electroactive polymer film body 3 a passage opening 49 created by the example, screws, rivets or brackets for fixing the capacitor 8th can be introduced.

9 shows a schematic sketch of a wave energy generator 21 using a wave energy transformer 5 according to one of the three embodiments of the invention. This is the wave energy transformer 5 at both ends 23 and 24 each in brackets 50 and 51 clamped or over screws 25 fixes and becomes the forces of swell 27 suspended by means of a float 41 and a coupling element 42 the movement of the waves 26 on the wave energy transformer 5 be transmitted.

By the arrangement of the electrodes shown in the preceding figures 6 and 7 is it possible to use the wave energy transformer 5 with his electrode 6 and its counter electrode 7 via appropriate power lines 43 and 44 with a generator circuit 28 connect to. The charge obtained in one cycle can be transferred via a DC / DC converter 45 in a battery 32 get saved. It is also possible via a line 46 from the generator circuit 28 from, a capacitor as a buffer 30 to charge with the won charges. Furthermore, the generator circuit 28 also with a frequency converter 40 connected, over the low frequencies of the swell 27 transformed into a mains frequency and, for example, a load 33 can be supplied.

To such electrical charges with the help of the wave energy transformer 5 It is necessary to extract the individual phases such as discharge phase and expansion phase of the wave energy transformer 5 with a position sensor 47 to connect the variable positions of the displaceable end 24 detected and depending on the curvature of the flexible capacitor 8th from a flat-wound electroactive polymer film body, the individual phases such as relaxation phase and expansion phase to a control unit 31 via a sensor cable 52 to transmit, with the control unit 31 with the generator circuit 28 over a line 48 interacts. A supply battery 29 provides a supply line 53 for an initial field strength applied to the wave energy transformer 5 to be applied from electroactive polymer for each cycle start.

LIST OF REFERENCE NUMBERS

1

Polymer film body (1st embodiment)

2

Polymer film body (2nd embodiment)

3

Polymer film body (3rd embodiment)

4

electroactive polymer film

5

Wave Energy Transformer

6

electrode

7

counter electrode

8th

capacitor

9

Polymer foil tape

10

Electrode structure (1st embodiment)

11

Electrode structure (2nd embodiment)

12

Polymer sheet material

13

Side on which electrodes are arranged

14

fold location

15

electrode area

16

electrode area

17

Connecting bar at the fold

18

Interconnect bridge

19

edge strips

20

reinforcing material

21

generator

22

clamping

23

End of the polymer film

24

End of the polymer film

25

screw

26

wave

27

waves

28

generator circuit

29

supply battery

30

intermediate condenser

31

control unit

32

rechargeable battery

33

load

34

Counter electrode area

35

Counter electrode area

36

folding surface

37

face

38

comb structure

39

broadside

40

frequency

41

float

42

coupling element

43

power line

44

power line

45

DC / DC converter

46

management

47

position sensor

48

management

49

Through opening

50

bracket

51

bracket

52

sensor line

53

supply line

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 602004008639 T2 [0002, 0007]
• US 2007/0257490 A1 [0003, 0007]
• EP 1212800 D1 [0008]

Claims (15)

Energy transformer with electroactive polymer film ( 4 ), wherein the energy transformer ( 5 ) a multilayer electroactive polymer film ( 4 ) with an electrode ( 6 ) and a counter electrode ( 7 ) of a mechanically flexible capacitor ( 8th ), characterized in that the multilayer electroactive polymer film ( 4 ) a flat-wound electroactive polymer film tape ( 9 ), wherein the electroactive polymer film strip ( 9 ) one-sided on the electroactive polymer film tape ( 9 ) arranged electrode structure ( 10 ) of an electrode ( 6 ) and a counter electrode ( 7 ) of the capacitor ( 8th ), wherein the electrode ( 6 ) and the counterelectrode ( 7 ) after winding under folding of the electroactive polymer film strip ( 9 ) to a flat-wound electroactive polymer film body ( 1 ) opposing electrodes ( 6 . 7 ) with interposed electroactive polymer foil material ( 12 ) form. Energy transformer according to claim 1, characterized in that the electrode ( 6 ) and the counterelectrode ( 7 ) of the electrode structures ( 10 . 11 ) on the common page ( 13 ) of the electroactive polymer film tape ( 9 ) are arranged comb-like interlocking, wherein in each case an uncoated fold ( 14 ) transverse to the longitudinal direction of the electroactive polymer film strip ( 9 ) is provided. Energy transformer according to claim 1 or claim 2, characterized in that in each case two identical electrode surfaces ( 15 . 16 ) of the electrode structure ( 10 ) are arranged side by side on the electrode material-coated side of the electroactive polymer film strip, which at the fold ( 14 ) via a narrow connecting web ( 17 ) are electrically connected to each other. Energy transformer according to claim 3, characterized in that at the juxtaposed same electrode surfaces ( 15 . 16 ), the electrode material of the counter electrode ( 7 ) in a narrow strip conductor ( 18 ) is passed by. Energy transformer according to one of the preceding claims, characterized in that the electroactive polymer film strip ( 9 ) a border strip ( 19 ) with reinforcing material ( 20 ), which is insulating and in the wound state mechanically in a generator ( 21 ) fixed on one or both sides and the capacity variation of a bending force under one-sided or bilateral fixation of the wound reinforced edge strip ( 19 ) is exposed. Energy transformer according to one of the preceding claims, characterized in that in the wound reinforced edge strip ( 19 ) a clamping element ( 22 ) is arranged. Energy transformer according to one of the preceding claims, characterized in that the reinforced, wound ends ( 23 . 24 ) the electroactive polymer film ( 4 ) are subjected to a capacity variation of an elongation. Energy transformer according to one of the preceding claims, characterized in that the reinforced ends ( 23 . 25 ) the electroactive polymer film ( 4 ) by means of screws ( 25 ), Rivets or clamps are arranged on a linkage, the tensile and compressive forces of a swell gear is placed. Energy transformer according to one of the preceding claims, characterized in that the linkage is a lattice structure which is located on the shafts ( 26 ) rides and through the waves ( 27 ) Induces compressive and tensile forces in grid bars of the grid structure, the grid bars resting on the flat-wound electroactive polymer film ( 4 ) influence the capacity variation. Energy transformer according to one of Claims 5 to 9, characterized in that the variable capacitance of the flat-wound electroactive polymer film ( 4 ) with a generator circuit ( 28 ), wherein the generator circuit ( 28 ) a supply battery ( 29 ), an intermediate capacitor ( 30 ) and a control unit ( 31 ), and wherein the control unit depends on the swell ( 27 ) Charges on the intermediate capacitor ( 30 ) and a rechargeable battery ( 32 ) and / or a load ( 33 ) feeds. Generator for converting mechanical wave energy into electrical energy, characterized by an energy transformer ( 5 ) according to one of the preceding claims. Wave energy plant characterized by an interaction of a plurality of energy transformers ( 5 ) according to one of the preceding claims. Process for producing a multilayer electroactive polymer film body ( 1 ) of an energy transformer ( 5 ), the method comprising the following steps: - producing an electroactive polymer film strip ( 9 ) of an electroactive polymer; Application of a mechanical reinforcing material ( 20 ) on edge strips ( 19 ) of the electroactive polymer film tape ( 9 ); One-sided coating of the electroactive polymer film strip ( 9 ) with an electrode structure ( 10 ) and a counter electrode structure ( 10 ), where the Structures ( 10 ) intermesh without touching each other, and the electrode surfaces ( 15 . 16 ) and the counter electrode surfaces ( 34 . 35 ) are larger than the interposed folding surfaces ( 36 ); Winding under folding of the electroactive polymer film strip ( 9 ) to a flat-wound multilayer electroactive polymer film body ( 1 ). Method according to claim 13, characterized in that in the electrode structure ( 10 . 11 ) on the electroactive polymer film belt ( 9 ) Folding surfaces ( 36 ) provided with their width end faces ( 37 ) of the flat-wound electroactive polymer film body ( 1 ) and the large-area electrodes ( 6 . 7 ) of the comb structure ( 38 ) the broadsides ( 39 ) of the electroactive polymer film body ( 1 ) form. Method according to claim 13 or claim 14, characterized in that the mechanical reinforcing material ( 20 ) the edge strip ( 19 ) to clamping elements ( 22 ) is compacted after by winding under folding of the electroactive polymer film tape ( 9 ) a flat-wound electroactive polymer film body ( 1 ) with reinforced edge strips ( 19 ) is present.

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