NL2019648B1 - Energy harvester and method of manufacturing such an energy harvester - Google Patents

Energy harvester and method of manufacturing such an energy harvester Download PDF

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Publication number
NL2019648B1
NL2019648B1 NL2019648A NL2019648A NL2019648B1 NL 2019648 B1 NL2019648 B1 NL 2019648B1 NL 2019648 A NL2019648 A NL 2019648A NL 2019648 A NL2019648 A NL 2019648A NL 2019648 B1 NL2019648 B1 NL 2019648B1
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NL
Netherlands
Prior art keywords
frame
flexible element
energy harvester
bending
bending element
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NL2019648A
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Dutch (nl)
Inventor
Pieter Van Zoest Wouter
Van Bracht Sjoerd
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Kinergizer Ip Bv
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Publication date
Application filed by Kinergizer Ip Bv filed Critical Kinergizer Ip Bv
Priority to NL2019648A priority Critical patent/NL2019648B1/en
Priority to PCT/NL2018/050637 priority patent/WO2019066650A1/en
Application granted granted Critical
Publication of NL2019648B1 publication Critical patent/NL2019648B1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K35/00—Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit
    • H02K35/04—Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit with moving coil systems and stationary magnets

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Micromachines (AREA)

Abstract

Energy harvester (1) comprising electrical outlet terminals (2, 3), a magnet and an electrical coil (4) directly or indirectly connected to said terminals (2, 3), as well as an assembly (6) of a first frame (7) and a second frame (8) 5 positioned within the first frame (7) and connected thereto with at least one flexible element (5) or flexure that sup— ports the second frame (8) within the first frame (7), and wherein the second frame (8) is movable with reference to the first frame (7) and is equipped to house one of the magnet and 10 the electrical coil (4) whereas the other of the magnet and the electrical coil (4) is fixed relative to the first frame (7) so as to arrange that movement of the electrical coil (4) relative to the magnet causes electrical power to appear at the electrical outlet terminals (2, 3), and wherein the at 15 least one flexible element (5) or flexure is embedded in a substance in liquid condition that is solidified with the flexible element (5) or flexure embedded therein and which so— lidified substance forms part of or connects to both the first frame (7) and to the second frame (8).

Description

Energy harvester and method of manufacturing such an energy harvester
The invention relates to a method of manufacturing an energy harvester, and such an energy harvester comprising electrical outlet terminals, a magnet and an electrical coil directly or indirectly connected to said terminals, as well as an assembly of a first frame and a second frame positioned within the first frame and connected thereto with at least one flexible element or flexure that supports the second frame within the first frame, and wherein the second frame is movable with reference to the first frame and is equipped to house one of the magnet and the electrical coil whereas the other of the magnet and the electrical coil is fixed relative to the first frame so as to arrange that movement of the electrical coil and magnet relative to each other causes electrical power to appear at the electrical outlet terminals.
Such an energy harvester is known from GB-A-2 446 685.
In general it is possible that the electrical coil connect to the outlet terminals and that externally from the energy harvester the output power available at the outlet terminals is conditioned. It is however also possible that the electronics for conditioning the power from the electrical coil are embedded in the energy harvester, to provide directly usable power at the outlet terminals. A problem in the construction of energy harvesters is accuracy in positioning the second frame with reference to the first frame. This problem is connected with the desired deflection characteristics of the second frame with reference to the first frame which are determinative for the dynamic characteristics of the energy harvester and the power that can be generated with the harvester.
It is known to apply screw or glue connections between the at least one flexible element or flexure and the first frame and second frame, but in all known types of connection providing an exact and stress-free placement is a difficult task.
The invention aims at providing a solution for this problem.
Accordingly the invention proposes an energy harvester and a method of manufacturing such an energy harvester in accordance with one or more of the appended claims.
Essentially the energy harvester of the invention and the method of its manufacture provides that the at least one flexible element or flexure is embedded in a substance in liquid condition that is solidified with the flexible element or flexure embedded therein and which solidified substance forms part of or connects to both the first frame and to the second frame .
In a first preferred embodiment of the invention the features are applied of providing the first frame and the second frame with receptacles that are equipped and dimensioned to receive a part of the flexible element or flexure, placing opposite parts of the at least one flexible element or flexure in said receptacles of the first frame and the second frame, therewith initially leaving room within the receptacles adjacent to the flexible element or flexure, filling the room in the receptacles with a curable substance for removal of any play between the at least one flexible element or flexure and the receptacles, and connecting the at least one flexible element or flexure to both the first frame and to the second frame by curing the curable substance in the room of the receptacles to provide a play free and stress-free connection between the at least one flexible element or flexure and the receptacles of the first frame and the second frame.
Another preferred embodiment of the invention applies the features of placing the at least one flexible element or flexure in a mould for the assembly of the first frame and the second frame, followed by moulding of the assembly of the first frame and the second frame with a plastic substance and providing said plastic substance around and against the at least one flexible element or flexure to provide an assembly wherein the at least one flexible element or flexure connects to both the first frame and the second frame. A very suitable way of moulding would be to implement the moulding step by injection moulding rather than simply pouring the plastic substance in a mould.
In all the above-mentioned embodiments it is advantageous to provide the at least one flexible element or flexure with through holes to receive the curable substance or the plastic so as to realize a through and through connection between the at least one flexible element or flexure and the assembly of the first frame and the second frame. A further preferable feature is that the at least one flexible element or flexure provides an electrical connection between the electrical coil and the electrical outlet terminals .
The invention will hereinafter be further elucidated with reference to the drawing of exemplary embodiments of manufacturing an energy harvester according to the invention that is not limiting as to the appended claims.
In the drawing: -figure 1 shows an assembly of an energy harvester according to a first embodiment of the invention; -figure 2 shows a more schematic view of an assembly of an energy harvester according to the first embodiment of the invention; -figure 3 shows a mould which may be used for manufacturing an energy harvester according to a second embodiment of the invention; -figure 4 shows the mould of figure 3 together with other elements for manufacturing the energy harvester of the invention; and -figure 5 shows the mould of figure 3 after injection moulding and prior to releasing the assembly of the first frame and second frame from the mould.
Whenever in the figures the same reference numerals are applied, these numerals refer to the same parts.
Making reference first to figure 1 a first preferred embodiment of an energy harvester 1 according to the invention is shown comprising electrical outlet terminals 2, 3 and an electrical coil 4 connected to said terminals 2, 3. The electrical coil 4 is connected to the terminals 2, 3 through flex ural elements 5 or flexures with electrically conductive properties, preferably comprising copper, which flexural elements 5 or flexures are also used for (indirectly) supporting the electrical coil 4 in the manner as will be discussed hereinafter .
Figure 1 further shows that the energy harvester 1 comprises an assembly 6 of a first frame 7 and a second frame 8. The second frame 8 is positioned within the first frame 7 and is connected thereto with -in this first preferred embodiment- two flexible elements 5 or flexures that support the second frame 8 within the first frame 7. The second frame 8 is equipped to house the electrical coil 4 which is movable through movement of the second frame 8 with reference to the first frame 7. The flexures 5 are therefore designed to provide sufficient flexibility in the support of the second frame 8, so that it can move with reference to the first frame 7 when the energy harvester 1 is subjected to external vibrations .
To support the energy harvesting or energy conversion by the energy harvester 1 the assembly 6 is further equipped to directly or indirectly support at least one magnet (not shown since this is clear to the skilled person) which is fixed relative to the first frame 7 so as to arrange that movement of the electrical coil 4 within the magnet's magnetic field causes electrical power to appear through induction at the electrical outlet terminals 2, 3 that connect to the electrical coil 4. For this purpose it is preferred that the flexible elements 5 or flexures provide an electrical connection between the electrical coil 4 and the electrical outlet terminals 2, 3.
It is pointed out that instead of the electrical coil 4 being housed in the second frame 8, it is also possible to have the electrical coil 4 and the magnet change position, so that the magnet will be housed in the second frame 8 and that the electrical coil will be directly or indirectly supported by the assembly 6 and assume a fixed position with reference to the first frame 7. The particular position of the electrical coil and the magnet is therefore not essential to the invention .
As can be best seen in figure 1, but also making reference to figure 2, the flexible elements 5 or flexures are connected to both the first frame 7 and to the second frame 8 in receptacles 9, 10 that are provided in the first frame 7 and second frame 8 respectively. The receptacles 9, 10 are equipped and dimensioned to receive opposite extremities of one flexible element 5 or flexure, therewith (initially) leaving some room within the receptacles 9, 10 adjacent to the concerning flexible element 5 or flexure. This room is subsequently filled with a curable substance for completely filling up the room and remove any play between the concerning flexible element 5 or flexure and the respective receptacles 9, 10. This can be best seen in figure 1. Figure 2 clearly shows that after the curable substance in the receptacles 9, 10 is cured a play free and stress-free connection is provided between the flexible elements 5 and the receptacles 9, 10 of the first frame 7 and the second frame 8. A suitable curable substance to be used may for instance be a plastic substance or an epoxy resin with adhesive properties. Other substances may however be equally suitable. One may for instance also use substances that solidify when combined with another substance, or substances that solidify when raising the temperature. A second preferred embodiment of the energy harvester of the invention and its method of manufacturing is elucidated in the following with reference to figures 3-5.
In figure 3 a mould 11 is shown that can be used for manufacturing an assembly of a first frame and second frame together with flexible elements that eventually will provide a supporting connection between the first frame and second frame which are to be made in the mould 11. The mould 11 comprises mould parts 15, 16 and 17. Mould parts 15 and 16 border a space 12 for the first frame to be moulded, and mould parts 16 and 17 border a space 21 for the second frame to be moulded.
Reference 14 indicates a slit in which eventually a flexible element or flexure is to be mounted, and which will extend on the one hand with one of its extremities into a partial space 18 forming part of the space 12 in which the first frame part will be formed, and on the other hand into the space 13 which is saved for receiving another end or extremity of the flexible element or flexure.
Figure 4 again shows the mould 11, and in addition the two flexible elements 5, parts of which are to be received in the slits 14 of the mould 11. Figure 4 also shows a covering plate 19 which is only required when the moulding step is done by injection moulding. For injection moulding the covering plate 19 will be provided on the side of the mould 11. After placement of the covering plate 19 on the mould 11, the mould 11 can be injected with an injectable plastic substance that is provided around and against the flexible elements 5 or flexures to provide an assembly of the first frame and the second frame and wherein the flexible elements 5 or flexures connect to both the first frame and the second frame being moulded. Figure 5 shows the assembly of the first frame 7, the second frame 8 and the flexures 5 at the end of the moulding process and before being removed from the mould 11. Thereafter the assembly can be removed from the mould 11.
Turning back to figure 4, this figure further shows that the flexible elements 5 are provided with through holes 20. The flexible elements 5 as shown in this figure 4 are preferably also used in the first preferred embodiment of figures 1 and 2, wherein the through holes 20 are intended to receive the curable substance according to said first preferred embodiment. In the second preferred embodiment of figures 3 -5 the through holes 20 receive the plastic substance that is injected in the mould 11 according to the second embodiment, so as to realize a through and through connection between the flexible elements 5 and the assembly of the first frame 7 and the second frame 8.
Although the invention has been discussed in the foregoing with reference to exemplary embodiments of a method of manufacturing the energy harvester of the invention, the invention is not restricted to these embodiments which can be varied in many ways without departing from the invention. The discussed exemplary embodiments shall therefore not be used to construe the appended claims strictly in accordance therewith. On the contrary the embodiments are merely intended to explain the wording of the appended claims without intent to limit the claims to these exemplary embodiments. The scope of protection of the invention shall therefore be construed in accordance with the appended claims only, wherein a possible ambiguity in the wording of the claims shall be resolved using these exemplary embodiments.

Claims (12)

1. Energie-oogster (1) omvattende elektrische aansluitterminals (2, 3), een magneet en een elektrische spoel (4) die direct of indirect verbonden is met genoemde terminals (2, 3), alsook een samenstel (6) van een eerste frame (7) en een tweede frame (8) dat gepositioneerd is binnen het eerste frame (7) en daarmee verbonden met ten minste één flexibel element (5) of buigelement die het tweede frame (8) binnen het eerste frame (7) steunt, en waarbij het tweede frame (8) beweegbaar is ten opzichte van het eerste frame (7) en is ingericht om één van de magneet en de elektrische spoel (4) te huisvesten waarbij de ander van de magneet en de elektrische spoel (4) ten opzichte van het eerste frame (7) gefixeerd is teneinde te bewerkstelligen dat beweging van de elektrische spoel (4) en de magneet ten opzichte van elkaar ertoe leidt dat elektrisch vermogen beschikbaar komt aan de elektrische aansluitterminals (2, 3), met het kenmerk dat het ten minste ene flexibele element (5) of buigelement is opgenomen in een substantie in vloeibare vorm welke uitgehard is met het flexibele element (5) of buigelement daarin opgenomen en welke uitgeharde substantie deel vormt van of in verbinding staat met zowel het eerste frame (7) als het tweede frame (8).An energy harvester (1) comprising electrical connection terminals (2, 3), a magnet and an electrical coil (4) connected directly or indirectly to said terminals (2, 3), as well as an assembly (6) of a first frame (7) and a second frame (8) positioned within the first frame (7) and connected thereto to at least one flexible element (5) or bending element that supports the second frame (8) within the first frame (7) and wherein the second frame (8) is movable relative to the first frame (7) and is arranged to accommodate one of the magnet and the electric coil (4), the other of the magnet and the electric coil (4) is fixed with respect to the first frame (7) in order to cause movement of the electric coil (4) and the magnet relative to each other to cause electric power to become available at the electric connection terminals (2, 3), characterized in that the at least one flexible element (5) or bending elements t is contained in a substance in liquid form which is cured with the flexible element (5) or bending element incorporated therein and which cured substance forms part of or communicates with both the first frame (7) and the second frame (8). 2. Energie-oogster volgens conclusie 1, met het kenmerk dat het ten minste ene flexibele element (5) of buigele-ment ten dele is opgenomen in opneemorganen (9, 10) die voorzien zijn in zowel het eerste frame (7) als het tweede frame (8), welke opneemorganen (9, 10) zijn uitgerust en gedimensioneerd voor het opnemen van tegenover gestelde delen van het ten minste ene flexibele element (5) of buigelement, daarbij aanvankelijk ruimte open latend binnen de opneemorganen (9, 10} naast het ten minste ene flexibele element (5) of buigeie-ment, welke ruimte gevuld wordt met een uithardbare substantie voor het verwijderen van iedere speling tussen het ten minste ene flexibele element (5) of buigelement en de opneemorganen (9, 10), en welke uithardbare substantie uitgehard wordt voor het verschaffen van een spelingsvrije en spanningsvrije verbinding tussen het ten minste ene flexibele element (5) of buigelement en de opneemorganen (9, 10) van het eerste frame (7) en het tweede frame (8).Energy harvester according to claim 1, characterized in that the at least one flexible element (5) or bending element is partly received in receiving members (9, 10) provided in both the first frame (7) and the second frame (8), which receiving members (9, 10) are equipped and dimensioned for receiving opposite parts of the at least one flexible element (5) or bending element, thereby initially leaving space open within the receiving members (9, 10} in addition to the at least one flexible element (5) or bending element, which space is filled with a curable substance for removing any play between the at least one flexible element (5) or bending element and the receiving members (9, 10), and which curable substance is cured to provide a play-free and stress-free connection between the at least one flexible element (5) or bending element and the receiving members (9, 10) of the first frame (7) and the second frame (8). 3. Energie-oogster volgens conclusie 1, met het kenmerk dat het samenstel (6) van het eerste frame (7) en het tweede frame (8) gevormd wordt door het gieten van een kunststof substantie welke voorzien wordt rond en tegen een deel van het ten minste ene flexibele element (5) of buigelement voor het verschaffen van een samenstel waarbij het ten minste ene flexibele element (5) of buigelement in verbinding staat met zowel het eerste frame (7) en het tweede frame (8).Energy harvester according to claim 1, characterized in that the assembly (6) of the first frame (7) and the second frame (8) is formed by casting a plastic substance which is provided around and against a part of the at least one flexible element (5) or bending element for providing an assembly wherein the at least one flexible element (5) or bending element is in communication with both the first frame (7) and the second frame (8). 4. Energie-oogster volgens conclusie 4, met het kenmerk dat het samenstel (6) van het eerste frame (7) en het tweede frame (8) gevormd wordt door spuitgieten.An energy harvester according to claim 4, characterized in that the assembly (6) of the first frame (7) and the second frame (8) is formed by injection molding. 5. Energie-oogster volgens één der conclusies 1-4, met het kenmerk dat het ten minste ene flexibele element (5) of buigelement voorzien is van doorgaande gaten (20) voor het opnemen van de uithardbare substantie of de kunststof substantie voor het realiseren van een door-en-doorverbinding tussen het ten minste ene flexibele element (5) of buigelement en het samenstel (6) van het eerste frame (7) en het tweede frame (8) .An energy harvester according to any one of claims 1-4, characterized in that the at least one flexible element (5) or bending element is provided with through holes (20) for receiving the curable substance or the plastic substance for realizing of a through-and-through connection between the at least one flexible element (5) or bending element and the assembly (6) of the first frame (7) and the second frame (8). 6. Energie-oogster volgens één der conclusies 1-5, met het kenmerk dat het ten minste ene flexibele element (5) of buigelement een elektrische verbinding verschaft tussen de elektrische spoel (4) en de elektrische aansluitterminals (2, 3} .Energy harvester according to one of claims 1 to 5, characterized in that the at least one flexible element (5) or bending element provides an electrical connection between the electrical coil (4) and the electrical connection terminals (2, 3}. 7. Werkwijze voor het vervaardigen van een energie-oogster (1) omvattende elektrische aansluitterminals (2, 3), een magneet en een elektrische spoel (4) die direct of indirect verbonden is met genoemde terminals (2, 3), omvattende de stap van het voorzien van een samenstel (6) van een eerste frame (7) en een tweede frame (8) dat gepositioneerd is binnen het eerste frame (7) en daarmee verbonden met ten minste één flexibel element (5) of buigelement dat het tweede frame (8) binnen het eerste frame (7) steunt, en erin voorzien dat het tweede frame (8) beweegbaar is ten opzichte van het eerste frame (7) en één van de magneet en de elektrische spoel (4) huisvest terwijl de ander van de magneet en de elektrische spoel (4) ten opzichte van het eerste frame (7) gefixeerd is teneinde te bewerkstelligen dat beweging van de elektrische spoel (4) en de magneet ten opzichte van elkaar ertoe leidt dat elektrisch vermogen beschikbaar komt aan de elektrische aansluitterminals (2, 3), gekenmerkt door erin te voorzien dat het ten minste ene flexibele element (5) of buigelement is opgenomen in een substantie in vloeibare vorm welke vervolgens wordt uitgehard met het flexibele element (5) of buigelement daarin opgenomen en erin te voorzien dat de uitgeharde substantie deel vormt van of in verbinding staat met zowel het eerste frame (7) als het tweede frame (8).Method for manufacturing an energy harvester (1) comprising electrical connection terminals (2, 3), a magnet and an electrical coil (4) which is directly or indirectly connected to said terminals (2, 3), comprising the step comprising providing an assembly (6) of a first frame (7) and a second frame (8) positioned within the first frame (7) and connected thereto to at least one flexible element (5) or bending element comprising the second frame (8) supports within the first frame (7), and provides that the second frame (8) is movable with respect to the first frame (7) and accommodates one of the magnet and the electric coil (4) while the other of the magnet and the electric coil (4) is fixed relative to the first frame (7) to cause movement of the electric coil (4) and the magnet relative to each other to cause electrical power to become available to the electric connection terminals (2, 3), characterized d to provide that the at least one flexible element (5) or bending element is included in a substance in liquid form which is subsequently cured with the flexible element (5) or bending element included therein and to provide that the cured substance forms part of or is in communication with both the first frame (7) and the second frame (8). 8. Werkwijze voor het vervaardigen van een energie-oogster volgens conclusie 7, gekenmerkt door erin te voorzien dat het eerste frame (7) en het tweede frame (8) zijn uitgevoerd met opneemorganen (9, 10) die uitgerust en gedimensioneerd zijn voor het opnemen van een deel van het ten minste ene flexibele element (5) of buigelement, en door plaatsing van tegenovergestelde delen van het ten minste ene flexibele element (5) of buigelement in genoemde opneemorganen (9, 10) van het eerste frame (7) respectievelijk het tweede frame (8), waarbij ruimte overblijft binnen de opneemorganen (9, 10) naast het ten minste ene flexibele element (5) of buigelement, en het vullen van de ruimte in de opneemorganen (9, 10) met een uithardbare substantie voor het verwijderen van alle speling tussen het ten minste ene flexibele element (5) of buigelement en de opneemorganen (9, 10), en verbinden van het ten minste ene flexibele element (5) of buigelement met zowel het eerste frame (7) als het tweede frame (8) door uitharden van de uithardbare substantie in de ruimte van de opneemorganen (9, 10) teneinde te voorzien in een spelingsvrije en span-ningsvrije verbinding tussen het ten minste ene flexibele element (5) of buigelement en de opneemorganen (9, 10) van het eerste frame (7) en het tweede frame (8).Method for manufacturing an energy harvester according to claim 7, characterized in that the first frame (7) and the second frame (8) are provided with pick-up members (9, 10) which are equipped and dimensioned for receiving a part of the at least one flexible element (5) or bending element, and by placing opposite parts of the at least one flexible element (5) or bending element in said receiving members (9, 10) of the first frame (7) respectively the second frame (8), wherein space remains within the receiving members (9, 10) in addition to the at least one flexible element (5) or bending element, and the filling of the space in the receiving members (9, 10) with a curable substance for removing all play between the at least one flexible element (5) or bending element and the receiving members (9, 10), and connecting the at least one flexible element (5) or bending element to both the first frame (7) and the second frame ( 8) by curing the curable substance in the space of the pick-up members (9, 10) to provide a play-free and stress-free connection between the at least one flexible element (5) or bending element and the pick-up members (9, 10) of the first frame (7) and the second frame (8). 9. Werkwijze voor het vervaardigen van een energie-oogster volgens conclusie 7, gekenmerkt door het plaatsen van het ten minste ene flexibele element (5) of buigelement in een vorm (11) voor het samenstellen van het eerste frame (7) en het tweede frame (8), gevolgd door het gieten in een vorm (11) van een kunststof substantie voor het samenstellen van het eerste frame (7) en het tweede frame (8), en erin te voorzien dat genoemde kunststof substantie rond en tegen het ten minste ene flexibele element (5) of buigelement komt te liggen voor het verschaffen van een samenstel (6) waarbij het ten minste ene flexibele element (5) of buigelement in verbinding staat met zowel het eerste frame (7) als het tweede frame (8).A method for manufacturing an energy harvester according to claim 7, characterized by placing the at least one flexible element (5) or bending element in a mold (11) for assembling the first frame (7) and the second frame (8), followed by molding a plastic substance into a mold (11) for assembling the first frame (7) and the second frame (8), and providing that said plastic substance around and against it at least one flexible element (5) or bending element comes to lie for providing an assembly (6) wherein the at least one flexible element (5) or bending element is in communication with both the first frame (7) and the second frame (8) ). 10. Werkwijze voor het vervaardigen van een energie-oogster volgens conclusie 7, gekenmerkt door erin te voorzien dat het gieten wordt uitgevoerd door spuitgieten.A method for manufacturing an energy harvester according to claim 7, characterized in that the casting is carried out by injection molding. 11. Werkwijze voor het vervaardigen van een energie-oogster volgens één der conclusies 7-10, gekenmerkt door erin te voorzien dat het ten minste ene flexibele element (5) of buigelement is uitgerust met doorgaande gaten (20) voor het opnemen van de uithardbare substantie of de kunststof substantie teneinde een door-en-doorverbinding te realiseren tussen het ten minste ene flexibele element (5) of buigelement en het samenstel van het eerste frame (7) en het tweede frame (8) .A method for manufacturing an energy harvester according to any one of claims 7-10, characterized in that the at least one flexible element (5) or bending element is provided with through holes (20) for receiving the curable substance or the plastic substance in order to realize a through-and-through connection between the at least one flexible element (5) or bending element and the assembly of the first frame (7) and the second frame (8). 12. Werkwijze voor het vervaardigen van een energie-oogster volgens één der conclusies 7-11, gekenmerkt door erin te voorzien dat het ten minste ene flexibele element (5) of buigelement werkzaam is als een elektrische verbinder tussen de elektrische spoel (4) en de elektrische aansluitterminals (2, 3) .A method for manufacturing an energy harvester according to any one of claims 7-11, characterized in that the at least one flexible element (5) or bending element acts as an electrical connector between the electric coil (4) and the electrical connection terminals (2, 3).
NL2019648A 2017-09-29 2017-09-29 Energy harvester and method of manufacturing such an energy harvester NL2019648B1 (en)

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EP4290075A1 (en) 2022-06-10 2023-12-13 Kinergizer IP BV Railway energy harvester

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