WO2005027235A1 - Kontaktierter piezoaktor - Google Patents
Kontaktierter piezoaktor Download PDFInfo
- Publication number
- WO2005027235A1 WO2005027235A1 PCT/EP2004/051015 EP2004051015W WO2005027235A1 WO 2005027235 A1 WO2005027235 A1 WO 2005027235A1 EP 2004051015 W EP2004051015 W EP 2004051015W WO 2005027235 A1 WO2005027235 A1 WO 2005027235A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- contact surfaces
- piezoceramic
- contact
- piezo actuator
- plastic cage
- Prior art date
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
- H10N30/87—Electrodes or interconnections, e.g. leads or terminals
- H10N30/875—Further connection or lead arrangements, e.g. flexible wiring boards, terminal pins
-
- 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
Definitions
- the invention relates to a piezo actuator with a piezoceramic that can expand when a voltage is applied, and a contact that is applied to the piezoceramic, and a method for its production.
- piezoelectric components which are made in particular from piezoceramics
- the effect is used that they generate a voltage when a mechanical pressure or tension is applied, or vice versa, and an expansion of the actuator can be achieved when an electrical voltage is applied to the piezo actuator
- monolithic multi-layer actuators which consist of a sintered stack of thin foils made of piezoceramic with embedded internal electrodes.
- the inner electrodes are mutually led out of the stack and electrically connected in parallel via outer electrodes.
- a strip-like or band-shaped continuous outer metallization is preferably applied to both contact sides of the stack.
- the outer metallization is connected to all inner electrodes of the same polarity. Between the outer metallization and the electrical
- connections are often provided in a form of wire contact that can be implemented in many forms. If you now apply an electrical voltage to the outer metallization, the piezo film stretches in the direction of the applied field. The mechanical series connection of the individual piezo films achieves the so-called nominal expansion of the entire stack even at relatively low voltages.
- a contacting method is known from EP 0 844 678 A1, by means of which a piezo ceramic can be contacted in such a way that the piezo actuator is not destroyed even under high dynamic loads.
- a three-dimensionally structured electrically conductive electrode is connected to the base metallization of the piezoceramic via partial contact points. It is designed to be stretchable between the contact points. This arrangement ensures that the operating current of the actuator is divided into secondary currents, these flowing from the contact points via the base metallization to the metallic island electrodes. This ensures that even dynamic loading of the piezo actuator does not lead to its destruction.
- the contacting is technically complex and expensive to implement.
- the object of the present invention is therefore to propose a piezo actuator and a method for its production, which can be contacted electrically easily and inexpensively.
- the piezo actuator accordingly has a piezo ceramic which expands when a voltage is applied.
- Contacts are provided to apply the voltage to the piezoceramic. These contacts are designed as curved shaped sheets, the shaped sheets having spaced-apart contact surfaces which form the contact.
- the shaped sheet is bent.
- the bending of the shaped sheets is designed such that the contact surfaces bear against the piezoceramic with a defined force.
- the contact area Chen on the shaped plate can be designed so that they form two contact tracks extending in the longitudinal direction of the shaped plate, which are spaced apart. The contact tracks thus extend in the longitudinal direction of the piezoceramic.
- the shaped sheets can be attached to the outer surface of a plastic cage.
- the piezoceramic is positioned in the interior of the plastic cage in such a way that the contact surfaces of the shaped sheets touch a metallization of the piezoceramic.
- the contact surfaces are formed on a bent shaped sheet.
- the contact surfaces are spaced apart from one another.
- the shaped sheet is attached to the outer surface of a plastic cage.
- the piezoceramic is pushed into the interior of the plastic cage in such a way that the contact surfaces lie against a metallization of the piezoceramic.
- the shaped sheets are preferably bent in such a way that the contact surfaces rest with a defined force after the piezoceramic has been inserted into the plastic cage.
- the mold plates can be etched for better contact making.
- the shaped sheets can be attached to the outside of the plastic cage in particular by caulking.
- the shaped sheets are bent in such a way that the contact surfaces press against the metallization running laterally on the piezoceramic with a predetermined force.
- the contact surfaces are preferably stationary with respect to the contact surfaces of the metallization, so that advantageously no frictional relative movement between contact surfaces (30, 32) and metallization occurs when the piezoceramic is deflected axially. which could lead to a temporary interruption of contact.
- the piezoceramic With this modular structure of the contacting and the design as a sliding contact, the piezoceramic can be contacted without having to solder the individual contact points.
- the modular structure and the insertion of the components into one another make it possible for the piezo actuator to be simple and inexpensive to produce, since complicated work steps can be dispensed with and simple materials can be used.
- Fig. 1 a schematic view of the individual components of the piezo actuator
- Fig. 2 a fully assembled piezo actuator
- FIG. 1 shows a schematic representation of the individual components of the piezo actuator 10 (FIG. 2).
- two shaped plates 12 are made available.
- the two shaped plates 12 are bent and preferably etched.
- a plastic cage 14 having an outer surface 16 and a cavity 18 is also provided.
- the bending of the shaped sheets 12 is carried out in such a way that the sheets 12 can be attached to the outer surface 16, the plastic cage 14 being encased.
- attachment points 20 are preferably provided on the surface 16 of the plastic cage 14, with the aid of which the shaped sheets can be attached.
- counterparts to the fastening points 20 are provided on the shaped sheets 12, for example in the form of cavities or holes 22. So that can the shaped sheets are, for example, caulked at the fastening points 20.
- Contact wires 24 can also be attached to the shaped sheets 12, in particular soldered or welded on.
- a piezoceramic 26 can be inserted into the cavity 18 of the plastic cage 14.
- the outer shape of the piezoceramic 26 is adapted to the shape of the cavity 18. In order to be able to contact the piezoceramic 26, it has at least one partial area 28 which is metallized.
- the piezo actuator 10 produced in this way has curved shaped plates 12 which are applied to the outside of the plastic cage 14.
- the piezoceramic 26 is introduced into an inner cavity of the plastic cage 14.
- contact wires 24 can be mounted on the outer surfaces of the shaped plates 12.
- the piezo actuator produced in this way can then be wrapped with an insulating film and, if necessary, completed to form an actuator unit.
- the contact surfaces 30 and 32 are preferably arranged such that the contact surfaces 30 form a first contact path 36 and the contact surfaces 32 form a second contact path 34.
- the contact surfaces 30 and 32 In the direction of extension of the piezoceramic 26, the contact surfaces 30 and 32 have a certain overlap, so that there is a connection to the piezoceramic at every point in the metallization 28.
Landscapes
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/595,153 US7605520B2 (en) | 2003-09-08 | 2004-06-03 | Connecting piezoactuator |
EP04741725A EP1665403A1 (de) | 2003-09-08 | 2004-06-03 | Kontaktierter piezoaktor |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10341333.2 | 2003-09-08 | ||
DE10341333A DE10341333B4 (de) | 2003-09-08 | 2003-09-08 | Piezoaktor und Verfahren zum Herstellen eines Piezoaktors |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005027235A1 true WO2005027235A1 (de) | 2005-03-24 |
Family
ID=34305614
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2004/051015 WO2005027235A1 (de) | 2003-09-08 | 2004-06-03 | Kontaktierter piezoaktor |
Country Status (5)
Country | Link |
---|---|
US (1) | US7605520B2 (de) |
EP (1) | EP1665403A1 (de) |
CN (1) | CN1849716A (de) |
DE (1) | DE10341333B4 (de) |
WO (1) | WO2005027235A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007090698A1 (de) | 2006-02-09 | 2007-08-16 | Continental Automotive Gmbh | Piezokeramischer vielschicht-aktor, verfahren zum herstellen eines piezokeramischen vielschicht-aktors und einspritzsystem |
DE102008050539A1 (de) * | 2008-10-06 | 2010-04-08 | Epcos Ag | Piezoaktor mit Außenelektrode |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1560931B1 (de) * | 2002-11-14 | 2011-07-27 | Dharmacon, Inc. | Funktionelle und hyperfunktionelle sirna |
WO2006006948A2 (en) * | 2002-11-14 | 2006-01-19 | Dharmacon, Inc. | METHODS AND COMPOSITIONS FOR SELECTING siRNA OF IMPROVED FUNCTIONALITY |
US20100113307A1 (en) * | 2002-11-14 | 2010-05-06 | Dharmacon, Inc. | siRNA targeting vascular endothelial growth factor (VEGF) |
US7691998B2 (en) * | 2002-11-14 | 2010-04-06 | Dharmacon, Inc. | siRNA targeting nucleoporin 62kDa (Nup62) |
DE102005043622A1 (de) * | 2005-09-13 | 2007-03-22 | Siemens Ag | Piezoelektrische Aktoreinheit bzw. piezoelektrische Antriebsvorrichtung |
DE102005044390A1 (de) * | 2005-09-16 | 2007-03-29 | Siemens Ag | Piezoaktor mit einem Mehrschichtfoliensystem und Verfahren zum Herstellen des Piezoaktors |
DE102009009164B4 (de) * | 2009-02-16 | 2014-10-02 | Continental Automotive Gmbh | Piezoelektrischer Aktor, Verfahren zur Herstellung des Aktors und Injektor |
DE102009034099A1 (de) * | 2009-07-21 | 2011-01-27 | Epcos Ag | Piezoaktor mit elektrischer Kontaktierung |
DE102011014446A1 (de) * | 2011-03-18 | 2012-09-20 | Epcos Ag | Piezoaktor und Verfahren zur Kontaktierung eines Piezoaktors |
KR101920730B1 (ko) * | 2011-08-08 | 2018-11-22 | 삼성전자주식회사 | 코어-셸 구조의 ZnSnO3/ZnO 나노와이어, ZnSnO3/ZnO 나노와이어의 그 형성방법 및 ZnSnO3/ZnO 나노와이어를 포함하는 나노 발전소자와, ZnSnO3 나노와이어의 그 형성방법 및 ZnSnO3 나노와이어를 포함하는 나노 발전소자 |
JP5842635B2 (ja) * | 2012-01-27 | 2016-01-13 | Tdk株式会社 | 積層型圧電素子 |
DE102012215774A1 (de) * | 2012-09-06 | 2014-03-06 | Robert Bosch Gmbh | Piezoelektrischer Aktor |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5271133A (en) * | 1992-09-21 | 1993-12-21 | Caterpillar Inc. | Method for making a piezoelectric stack |
WO2000063980A1 (de) * | 1999-04-20 | 2000-10-26 | Robert Bosch Gmbh | Piezoelektrischer aktor |
EP1257006A1 (de) * | 2001-05-09 | 2002-11-13 | Tyco Electronics UK Limited | Elektrische Verbindungsanordnung |
WO2003005490A2 (de) * | 2001-06-29 | 2003-01-16 | Siemens Aktiengesellschaft | Weiterkontaktierung für ein piezoelektrisches bauteil in vielschichtbauweise |
WO2004004021A2 (de) * | 2002-07-01 | 2004-01-08 | Siemens Aktiengesellschaft | Piezoaktor sowie verfahren zu dessen herstellung |
WO2004027887A2 (de) * | 2002-09-11 | 2004-04-01 | Siemens Aktiengesellschaft | Piezoelektrischer aktor |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19648545B4 (de) * | 1996-11-25 | 2009-05-07 | Ceramtec Ag | Monolithischer Vielschichtaktor mit Außenelektroden |
DE19715488C1 (de) * | 1997-04-14 | 1998-06-25 | Siemens Ag | Piezoaktor mit neuer Kontaktierung und Herstellverfahren |
DE19910111B4 (de) * | 1999-03-08 | 2007-06-06 | Siemens Ag | Verfahren zur Herstellung eines elektrotechnischen Bauteils mit einer kunststoffpassivierten Oberfläche und Vorrichtung zum Durchführen des Verfahrens |
JP2002203997A (ja) * | 2000-12-28 | 2002-07-19 | Denso Corp | 圧電アクチュエータ |
JP4248777B2 (ja) * | 2000-12-28 | 2009-04-02 | 株式会社デンソー | インジェクタ用圧電体素子及びその製造方法,並びにインジェクタ |
EP1384272B1 (de) * | 2001-04-30 | 2005-06-22 | Siemens Aktiengesellschaft | Weiterkontaktierung für ein elektrisches bauteil sowie piezoelektrisches bauteil in vielschichtbauweise |
DE10126656A1 (de) * | 2001-06-01 | 2002-12-05 | Endress & Hauser Gmbh & Co Kg | Elektromechanischer Wandler mit mindestens einem piezoelektrischen Element |
-
2003
- 2003-09-08 DE DE10341333A patent/DE10341333B4/de not_active Expired - Fee Related
-
2004
- 2004-06-03 WO PCT/EP2004/051015 patent/WO2005027235A1/de active Application Filing
- 2004-06-03 CN CNA2004800257763A patent/CN1849716A/zh active Pending
- 2004-06-03 EP EP04741725A patent/EP1665403A1/de not_active Withdrawn
- 2004-06-03 US US10/595,153 patent/US7605520B2/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5271133A (en) * | 1992-09-21 | 1993-12-21 | Caterpillar Inc. | Method for making a piezoelectric stack |
WO2000063980A1 (de) * | 1999-04-20 | 2000-10-26 | Robert Bosch Gmbh | Piezoelektrischer aktor |
EP1257006A1 (de) * | 2001-05-09 | 2002-11-13 | Tyco Electronics UK Limited | Elektrische Verbindungsanordnung |
WO2003005490A2 (de) * | 2001-06-29 | 2003-01-16 | Siemens Aktiengesellschaft | Weiterkontaktierung für ein piezoelektrisches bauteil in vielschichtbauweise |
WO2004004021A2 (de) * | 2002-07-01 | 2004-01-08 | Siemens Aktiengesellschaft | Piezoaktor sowie verfahren zu dessen herstellung |
WO2004027887A2 (de) * | 2002-09-11 | 2004-04-01 | Siemens Aktiengesellschaft | Piezoelektrischer aktor |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007090698A1 (de) | 2006-02-09 | 2007-08-16 | Continental Automotive Gmbh | Piezokeramischer vielschicht-aktor, verfahren zum herstellen eines piezokeramischen vielschicht-aktors und einspritzsystem |
US7851979B2 (en) | 2006-02-09 | 2010-12-14 | Continental Automotive Gmbh | Piezoceramic multilayer actuator, method for producing a piezoceramic multilayer actuator, and injection system |
DE102008050539A1 (de) * | 2008-10-06 | 2010-04-08 | Epcos Ag | Piezoaktor mit Außenelektrode |
US9214620B2 (en) | 2008-10-06 | 2015-12-15 | Epcos Ag | Piezoelectric actuator with outer electrode |
Also Published As
Publication number | Publication date |
---|---|
US20070040480A1 (en) | 2007-02-22 |
CN1849716A (zh) | 2006-10-18 |
EP1665403A1 (de) | 2006-06-07 |
US7605520B2 (en) | 2009-10-20 |
DE10341333A1 (de) | 2005-04-28 |
DE10341333B4 (de) | 2006-06-08 |
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