WO2001091199A1 - Piezoaktor - Google Patents
Piezoaktor Download PDFInfo
- Publication number
- WO2001091199A1 WO2001091199A1 PCT/DE2001/001328 DE0101328W WO0191199A1 WO 2001091199 A1 WO2001091199 A1 WO 2001091199A1 DE 0101328 W DE0101328 W DE 0101328W WO 0191199 A1 WO0191199 A1 WO 0191199A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- piezo actuator
- electrodes
- extensions
- actuator according
- outer electrodes
- Prior art date
Links
- 238000005266 casting Methods 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 3
- 238000007747 plating Methods 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims 1
- 229910052802 copper Inorganic materials 0.000 claims 1
- 239000010949 copper Substances 0.000 claims 1
- 238000004382 potting Methods 0.000 claims 1
- 239000013078 crystal Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- GHYOCDFICYLMRF-UTIIJYGPSA-N (2S,3R)-N-[(2S)-3-(cyclopenten-1-yl)-1-[(2R)-2-methyloxiran-2-yl]-1-oxopropan-2-yl]-3-hydroxy-3-(4-methoxyphenyl)-2-[[(2S)-2-[(2-morpholin-4-ylacetyl)amino]propanoyl]amino]propanamide Chemical compound C1(=CCCC1)C[C@@H](C(=O)[C@@]1(OC1)C)NC([C@H]([C@@H](C1=CC=C(C=C1)OC)O)NC([C@H](C)NC(CN1CCOCC1)=O)=O)=O GHYOCDFICYLMRF-UTIIJYGPSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229940125797 compound 12 Drugs 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 235000013550 pizza Nutrition 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
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
- H10N30/872—Connection electrodes of multilayer piezoelectric or electrostrictive devices, e.g. external electrodes
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/21—Fuel-injection apparatus with piezoelectric or magnetostrictive elements
Definitions
- the invention relates to a piezo actuator, for example for actuating a mechanical component such as a valve or the like, according to the generic features of the main claim.
- a piezo element can be constructed from a material with a suitable crystal structure by using the so-called piezo effect.
- the piezoelectric element reacts mechanically, which, depending on the crystal structure and the contact areas of the electrical voltage, represents a push or pull in a predeterminable direction.
- This piezo actuator can be constructed in several layers (multilayer actuators), the electrodes via which the electrical voltage is applied being arranged between the layers. W
- Such piezo actuators can be provided, for example, for driving switching valves in fuel injection systems in motor vehicles.
- particular care must be taken to ensure that mechanical stresses in the layer structure also do not cause any troublesome cracks in the area of the outer connection electrodes. Since the inner electrodes contacted in each case on one side are integrated into the layer structure in the manner of a comb, the electrodes which follow one another in the direction of the layer structure must be contacted alternately on opposite sides.
- the piezo actuator described at the outset which can be used, for example, to actuate a mechanical component, is advantageously designed in such a way that at least one layer of the respective outer electrode is constructed in a mesh-like or fabric-like manner on a respective side surface and is contacted at least in points with the respective inner electrodes.
- the mesh-like or fabric-like outer electrodes are extended over the multilayer structure of the piezo layers in such a way that the Extensions the supply of electrical voltage via appropriate connections.
- the invention advantageously achieves that the connection to the extension of the outer electrode produces an improved and mechanically more robust contact.
- the adhesion of the electrodes to the piezo actuator is very low, so that even small forces can cause the external electrode to peel off the piezo actuator.
- the number of electrical connections required in the area of the multilayer structure can then be reduced.
- the outer electrodes are extended beyond the piezo actuator foot, ideally up to the plug, they can be contacted in a non-critical area. On the one hand, this enables cost-effective production, on the other hand, the process and failure risk is reduced at this point. It is also advantageous that there is also no need for an additional inactive area on the multilayer structure for contacting, which would otherwise be necessary, as a result of which a shorter overall length is made possible and further costs can be saved.
- the extensions are electrically insulated through the foot part, for example made of steel or Al 2 O 3 , of the piezo actuator to which the multilayer structure of the piezo layers is attached. It is also advantageous here if the extensions for fixing and for strain relief of the outer electrodes are held in a casting compound which is in a recess of the foot part, possibly surrounded by a molded part made of steel or polymer.
- the extensions can also be advantageously implemented in that the outer electrodes are tapered in the area of the extensions. Furthermore, the outer electrodes can also be folded or rolled in the area of the extensions.
- the mesh-like or fabric-like outer electrodes can consist of crossed horizontally and vertically laid wires or wires which are laid at an angle of 45 °, which are in contact with one another by copper-plating or tin-plating.
- FIG. 1 shows a section through a piezo actuator with a multilayer structure of layers of pizza ceramic and internal electrodes and a mesh-like external electrode extended by a base part;
- Figure 2 shows a section on the line AA in the embodiment of Figure 1;
- Figure 3 shows a detail section in the area of the passage of the extended outer electrode through the foot part;
- FIGS. 1 to 3 shows a modification of the example according to FIGS. 1 to 3 with an additional molded part in the area of the extensions;
- FIG. 5 shows a modification of the preceding examples with an outer electrode tapering in the extension
- FIG. 6 shows an embodiment with an outer electrode folded in the extension
- Figure 7 shows an embodiment with an outer electrode rolled in the extension
- Figure 10 shows a detail section through the copper-plated or tinned wires of the mesh or fabric-like outer electrode.
- piezo actuator 1 which is constructed in a manner known per se from piezo foils of a ceramic material with a suitable crystal structure, so that using the so-called piezo effect when an external electrical voltage is applied to internal electrodes 2 and 3, a mechanical reaction of the piezo actuator 1 takes place in the axial direction via external electrodes 4 and 5.
- the piezo actuator is firmly embedded in a housing 7, for example the housing of an injection valve for motor vehicles, via a foot part 6.
- the outer electrodes 4 and 5 have extensions 8 and 9, at the lower end of which an electrical connection for a power supply can be attached.
- the extensions 8 and 9 are electrically insulated, for example by means of a shrink tube 10.
- FIG. 3 shows the area in which the extensions 8 or 9 are carried out in detail using an exemplary embodiment.
- FIG. 4 shows a modification for fixing and for strain relief of the outer electrodes 4 and 5 or the extensions 8 and 9 with a molded part 13 located in the base part 6, into which the casting compound 12 is inserted.
- FIGS. 5 to 7 Different exemplary embodiments of the electrode extensions 8 and 9 are shown in FIGS. 5 to 7. According to FIG. 5, the extensions 8 and 9 are only tapered, which can also be seen from the cross section of the extension 9 shown below.
- FIG. 6 shows an extension 9 that is folded and
- FIG. 7 shows an extension 9 that is rolled, which in turn can be seen from the cross sections of the extension 9 drawn below.
- FIG. 8 shows a network-like structure of the outer electrode 4 or 5 with wires 14 and 15 running horizontally and vertically
- FIG. 9 shows a comparable structure with wires 14 and 15 inclined at 45 °.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP01931409A EP1230688A1 (de) | 2000-05-25 | 2001-04-05 | Piezoaktor |
KR1020027001003A KR20020024309A (ko) | 2000-05-25 | 2001-04-05 | 압전 액츄에이터 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10026005.5 | 2000-05-25 | ||
DE2000126005 DE10026005B4 (de) | 2000-05-25 | 2000-05-25 | Piezoaktor |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001091199A1 true WO2001091199A1 (de) | 2001-11-29 |
Family
ID=7643584
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2001/001328 WO2001091199A1 (de) | 2000-05-25 | 2001-04-05 | Piezoaktor |
Country Status (6)
Country | Link |
---|---|
US (1) | US20020135275A1 (de) |
EP (1) | EP1230688A1 (de) |
KR (1) | KR20020024309A (de) |
CZ (1) | CZ2002196A3 (de) |
DE (1) | DE10026005B4 (de) |
WO (1) | WO2001091199A1 (de) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007141137A2 (de) | 2006-06-08 | 2007-12-13 | Robert Bosch Gmbh | Piezoelektrischer aktor |
WO2010020643A1 (de) * | 2008-08-18 | 2010-02-25 | Epcos Ag | Piezoaktor in vielschichtbauweise |
DE102010022925A1 (de) | 2010-06-07 | 2011-12-08 | Epcos Ag | Piezoelektrisches Vielschichtbauelement und Verfahren zur Ausbildung einer Außenelektrode bei einem piezoelektrischen Vielschichtbauelement |
JP2014110259A (ja) * | 2012-11-30 | 2014-06-12 | Kyocera Corp | 積層型圧電素子およびこれを備えた噴射装置ならびに燃料噴射システム |
EP3116042A1 (de) * | 2015-07-10 | 2017-01-11 | Robert Bosch Gmbh | Piezoaktormodul und piezoinjektor |
JPWO2016002262A1 (ja) * | 2014-07-04 | 2017-04-27 | 株式会社村田製作所 | 圧電センサおよび圧電素子 |
Families Citing this family (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10259949A1 (de) | 2002-12-20 | 2004-07-01 | Robert Bosch Gmbh | Piezoaktor |
DE102005039548A1 (de) | 2005-08-22 | 2007-03-01 | Robert Bosch Gmbh | Piezoaktor mit einer Steckverbindung |
DE102005039567A1 (de) | 2005-08-22 | 2007-03-01 | Robert Bosch Gmbh | Anordnung mit einem Piezoaktor und ein Verfahren zu dessen Herstellung |
DE102005039911A1 (de) * | 2005-08-24 | 2007-03-08 | Robert Bosch Gmbh | Anordnung mit einem Piezoaktor |
DE102005046122A1 (de) * | 2005-09-27 | 2007-03-29 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
DE102006045663A1 (de) | 2006-09-27 | 2008-04-03 | Robert Bosch Gmbh | Piezoaktor mit einer Ummantelung, zur Anordnung in einem Piezoinjektor |
DE102006051325A1 (de) | 2006-10-31 | 2008-05-08 | Robert Bosch Gmbh | Anordnung eines Piezoaktors in einer Hülse eines Piezoaktormoduls |
DE102007001566A1 (de) | 2007-01-10 | 2008-07-17 | Robert Bosch Gmbh | Verfahren zur Isolierung des aktiven Bereichs eines Piezoaktors und Piezoaktor |
DE102007001563A1 (de) | 2007-01-10 | 2008-07-17 | Robert Bosch Gmbh | Piezoaktor mit zwischen einem Aktorkopf und einem Aktorfuß eingespannten Piezoelementen |
DE102007004552A1 (de) | 2007-01-30 | 2008-07-31 | Robert Bosch Gmbh | Verfahren zur Herstellung eines Piezoaktormoduls mit einem Schutzschichtsystem |
DE102007004559B4 (de) | 2007-01-30 | 2020-02-27 | Robert Bosch Gmbh | Piezoaktormodul oder Piezoaktor mit einem ummantelnden Schutzschichtsystem und Verfahren zur Herstellung eines solchen Schutzschichtsystems |
KR20080093281A (ko) * | 2007-04-16 | 2008-10-21 | 주식회사 메디슨 | 초음파 진단용 프로브 |
DE102007040509A1 (de) | 2007-08-28 | 2009-03-05 | Robert Bosch Gmbh | Piezoaktormodul mit einer Umhüllung des Piezoaktors und ein Verfahren zu dessen Herstellung |
DE102007042224A1 (de) | 2007-09-05 | 2009-03-12 | Robert Bosch Gmbh | Piezoaktormodul mit mehreren untereinander verbundenen Piezoaktoren |
DE102007044751A1 (de) | 2007-09-19 | 2009-04-09 | Robert Bosch Gmbh | Piezoaktormodul mit mehreren Piezoaktoren |
DE102007046314A1 (de) | 2007-09-27 | 2009-04-02 | Robert Bosch Gmbh | Piezoaktormodul mit mehreren untereinander verbundenen Piezoaktoren und ein Verfahren zu dessen Herstellung |
DE102007046315A1 (de) | 2007-09-27 | 2009-04-02 | Robert Bosch Gmbh | Piezoaktormodul mit mehreren untereinander verbundenen Piezoaktoren und ein Verfahren zu dessen Herstellung |
DE102007056553A1 (de) | 2007-11-23 | 2009-05-28 | Robert Bosch Gmbh | Verfahren zur Herstellung eines Piezoaktormoduls mit einer Umhüllung und ein so hergestelltes Piezoaktormodul |
DE102007060052A1 (de) | 2007-12-13 | 2009-06-18 | Robert Bosch Gmbh | Anordnung mit einem Piezoaktor mit mehreren Aktiv- und/oder zusätzlichen Sensorbereichen |
DE102008003840A1 (de) | 2008-01-10 | 2009-07-16 | Robert Bosch Gmbh | Piezoaktor mit flexiblen Außenelektroden |
DE102008004227A1 (de) | 2008-01-14 | 2009-07-16 | Robert Bosch Gmbh | Piezoaktormodul mit mehreren Piezoaktoren und ein Verfahren zu dessen Herstellung |
WO2009104310A1 (ja) * | 2008-02-18 | 2009-08-27 | セイコーインスツル株式会社 | 圧電振動子の製造方法、圧電振動子、発振器、電子機器および電波時計 |
DE102008055119A1 (de) | 2008-12-23 | 2010-07-01 | Robert Bosch Gmbh | Piezoinjektor |
DE102009029213B4 (de) | 2009-09-04 | 2017-03-30 | Robert Bosch Gmbh | Anordnung mit einem Aktor |
JP6017937B2 (ja) * | 2012-11-28 | 2016-11-02 | 京セラ株式会社 | 積層型圧電素子およびこれを備えた噴射装置ならびに燃料噴射システム |
DE102013106223A1 (de) * | 2013-06-14 | 2014-12-18 | Epcos Ag | Vielschichtbauelement mit einer Außenkontaktierung, einer Weiterkontaktierung und einem Verbindungselement |
DE102020113700A1 (de) | 2020-05-20 | 2021-11-25 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Piezoelektrisches Funktionsnetzwerk |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3223801A1 (de) * | 1982-06-25 | 1983-12-29 | Siemens AG, 1000 Berlin und 8000 München | Verfahren zur herstellung eines piezoelektrischen stellgliedes |
DE3330538A1 (de) * | 1983-08-24 | 1985-03-14 | Siemens AG, 1000 Berlin und 8000 München | Piezoelektrisches stellglied |
EP0844678A1 (de) * | 1996-11-25 | 1998-05-27 | CeramTec AG Innovative Ceramic Engineering | Aussenelektrode für einen monolithischen Vielschichtaktor |
DE19753930A1 (de) * | 1997-12-05 | 1999-06-10 | Ceramtec Ag | Verfahren zur Anbringung von Außenelektroden an Festkörperaktoren |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02266578A (ja) * | 1989-04-06 | 1990-10-31 | Nec Corp | 電歪効果素子 |
DE19909452C1 (de) * | 1999-03-04 | 2000-03-23 | Bosch Gmbh Robert | Piezoelektrischer Aktor |
DE19928176A1 (de) * | 1999-06-19 | 2001-01-04 | Bosch Gmbh Robert | Piezoaktor |
-
2000
- 2000-05-25 DE DE2000126005 patent/DE10026005B4/de not_active Expired - Lifetime
-
2001
- 2001-04-05 US US10/031,788 patent/US20020135275A1/en not_active Abandoned
- 2001-04-05 WO PCT/DE2001/001328 patent/WO2001091199A1/de not_active Application Discontinuation
- 2001-04-05 CZ CZ2002196A patent/CZ2002196A3/cs unknown
- 2001-04-05 EP EP01931409A patent/EP1230688A1/de not_active Withdrawn
- 2001-04-05 KR KR1020027001003A patent/KR20020024309A/ko not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3223801A1 (de) * | 1982-06-25 | 1983-12-29 | Siemens AG, 1000 Berlin und 8000 München | Verfahren zur herstellung eines piezoelektrischen stellgliedes |
DE3330538A1 (de) * | 1983-08-24 | 1985-03-14 | Siemens AG, 1000 Berlin und 8000 München | Piezoelektrisches stellglied |
EP0844678A1 (de) * | 1996-11-25 | 1998-05-27 | CeramTec AG Innovative Ceramic Engineering | Aussenelektrode für einen monolithischen Vielschichtaktor |
DE19753930A1 (de) * | 1997-12-05 | 1999-06-10 | Ceramtec Ag | Verfahren zur Anbringung von Außenelektroden an Festkörperaktoren |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007141137A2 (de) | 2006-06-08 | 2007-12-13 | Robert Bosch Gmbh | Piezoelektrischer aktor |
WO2007141137A3 (de) * | 2006-06-08 | 2008-03-20 | Bosch Gmbh Robert | Piezoelektrischer aktor |
WO2010020643A1 (de) * | 2008-08-18 | 2010-02-25 | Epcos Ag | Piezoaktor in vielschichtbauweise |
US8638025B2 (en) | 2008-08-18 | 2014-01-28 | Epcos Ag | Piezo actuator with external electrode soldered to outer face |
DE102010022925A1 (de) | 2010-06-07 | 2011-12-08 | Epcos Ag | Piezoelektrisches Vielschichtbauelement und Verfahren zur Ausbildung einer Außenelektrode bei einem piezoelektrischen Vielschichtbauelement |
WO2011154348A1 (de) | 2010-06-07 | 2011-12-15 | Epcos Ag | Piezoelektrisches vielschichtbauelement und verfahren zur ausbildung einer aussenelektrode bei einem piezoelektrischen vielschichtbauelement |
EP2577757A1 (de) * | 2010-06-07 | 2013-04-10 | Epcos AG | Piezoelektrisches vielschichtbauelement und verfahren zur ausbildung einer aussenelektrode bei einem piezoelektrischen vielschichtbauelement |
DE102010022925B4 (de) | 2010-06-07 | 2019-03-07 | Tdk Electronics Ag | Piezoelektrisches Vielschichtbauelement und Verfahren zur Ausbildung einer Außenelektrode bei einem piezoelektrischen Vielschichtbauelement |
JP2014110259A (ja) * | 2012-11-30 | 2014-06-12 | Kyocera Corp | 積層型圧電素子およびこれを備えた噴射装置ならびに燃料噴射システム |
JPWO2016002262A1 (ja) * | 2014-07-04 | 2017-04-27 | 株式会社村田製作所 | 圧電センサおよび圧電素子 |
EP3116042A1 (de) * | 2015-07-10 | 2017-01-11 | Robert Bosch Gmbh | Piezoaktormodul und piezoinjektor |
Also Published As
Publication number | Publication date |
---|---|
KR20020024309A (ko) | 2002-03-29 |
CZ2002196A3 (cs) | 2002-07-17 |
DE10026005A1 (de) | 2001-12-06 |
US20020135275A1 (en) | 2002-09-26 |
EP1230688A1 (de) | 2002-08-14 |
DE10026005B4 (de) | 2004-07-08 |
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