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WO2009047048A1 - Procédé de polarisation d'un élément piézoélectrique - Google Patents

Procédé de polarisation d'un élément piézoélectrique Download PDF

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Publication number
WO2009047048A1
WO2009047048A1 PCT/EP2008/061481 EP2008061481W WO2009047048A1 WO 2009047048 A1 WO2009047048 A1 WO 2009047048A1 EP 2008061481 W EP2008061481 W EP 2008061481W WO 2009047048 A1 WO2009047048 A1 WO 2009047048A1
Authority
WO
WIPO (PCT)
Prior art keywords
piezoelectric element
pulse amplitude
amplitude
time
pulse
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2008/061481
Other languages
German (de)
English (en)
Inventor
Christoph Hamann
Christian Reichinger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Continental Automotive GmbH
Original Assignee
Continental Automotive GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Continental Automotive GmbH filed Critical Continental Automotive GmbH
Publication of WO2009047048A1 publication Critical patent/WO2009047048A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • H10N30/01—Manufacture or treatment
    • H10N30/04—Treatments to modify a piezoelectric or electrostrictive property, e.g. polarisation characteristics, vibration characteristics or mode tuning
    • H10N30/045—Treatments to modify a piezoelectric or electrostrictive property, e.g. polarisation characteristics, vibration characteristics or mode tuning by polarising
    • 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 method for polarizing a piezoelectric element according to the features of the preamble of patent claim 1.
  • Piezoelectric elements which are used, for example, as piezoactuators for fuel injection in internal combustion engines, consist of mutually sintered stacks of piezoceramic layers, each with metal electrodes lying between the piezoceramic layers.
  • the individual metal electrodes are each connected in alternation with the plus or minus pole of a voltage source, via which voltage is supplied to the piezoelectric element for polarization.
  • a polarization field is applied to them through the metal electrodes.
  • the polarization results in an ordered distribution of aligned in the field direction in the crystals of the ceramic domains over the originally unpolarized initial state.
  • the piezoelectric element is permanently extended in the direction of the applied field.
  • tensile stresses can occur in the region of the ceramic layers that is not extended by the field effect in the piezoelectric element, as a result of which it is possible to form poling cracks within the ceramic layers which shorten the operating life of the piezoelectric element.
  • the object underlying the present invention is now to extend the service life of the piezoelectric element.
  • the pulse amplitude of the first time period is selected such that polarization cracks form within the piezoelectric element. Furthermore, in the second time duration, the pulse amplitude is selected such that the piezoelectric element is poled as gently as possible.
  • FIG. 1 shows a schematic view of a structure of a piezoelectric element
  • FIG. 2 shows a pulse profile for polarizing the piezoelectric element.
  • FIG. 1 shows a schematic view of a structure of a piezoelectric element.
  • a piezoelectric element 10 consists of a plurality of piezoceramic layers 11 arranged one above the other, between each of which a metal electrode 12 is arranged.
  • the individual metal electrodes 12 each have a recess 13 at one of their corners, wherein the recess 13 is arranged alternately at respectively opposite corners of successive metal electrodes 12.
  • those metal electrodes 12 which have no recess there are connected to one another and connected to the plus or minus pole of a voltage source.
  • a field for polarizing the piezoelectric element and following the polarization for the operation of the piezoelectric element is generated.
  • the voltage applied to the electrodes 14, 15 voltage is provided by a not visible in the figure 1 voltage source. Furthermore, it is ensured by the recesses 13 that a metal electrode 12 is connected in each case only to one electrode 14.
  • FIG. 2 shows a pulse profile for polarizing the piezoelectric element.
  • the latter is given a specific pulse profile for a predefinable time t with a specific pulse amplitude A. guided.
  • the piezoelectric element is preferably acted upon by a voltage pulse.
  • the piezoelectric element is supplied for a first time tl a certain number of voltage pulses with a constant pulse amplitude Al.
  • the pulse amplitude Al is chosen such that form within the piezoelectric element first poling cracks.
  • the piezoelectric element is subjected to further voltage pulses for a second time duration t 2.
  • the output amplitude A2 of the first voltage pulse Il and the following pulse amplitudes of the second time duration t2 are chosen such that the formation of poling cracks should be avoided as far as possible.
  • the pulse amplitude which is supplied to the piezoelectric element within the time period t2 increases until a maximum amplitude value A-max is reached.
  • the increase in the pulse amplitude from the output amplitude A2 to the maximum amplitude value Amax is preferably linear.
  • the piezoelectric element is applied to the end of the second time period t2 and thus the polarization. By means of the polarity a gentle polarization of the piezoelectric element is ensured.
  • the durations of the individual pulse pulses can be of different lengths and do not have to be in the limited to a triangular pulse pulse.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne un procédé de polarisation d'un élément piézoélectrique. L'élément piézoélectrique est sollicité pendant une première durée en impulsions de tension dont l'amplitude d'impulsion est choisie de telle sorte que des fissures de polarisation se forment à l'intérieur de l'élément piézoélectrique. De plus, l'élément piézoélectrique est sollicité pendant une seconde durée en impulsions dont l'amplitude d'impulsion augmente d'une amplitude d'impulsion initiale à une valeur d'amplitude maximale.
PCT/EP2008/061481 2007-10-05 2008-09-01 Procédé de polarisation d'un élément piézoélectrique Ceased WO2009047048A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007047657A DE102007047657B3 (de) 2007-10-05 2007-10-05 Verfahren zum Polarisieren eines piezoelektrischen Elements
DE102007047657.6 2007-10-05

Publications (1)

Publication Number Publication Date
WO2009047048A1 true WO2009047048A1 (fr) 2009-04-16

Family

ID=39971012

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/061481 Ceased WO2009047048A1 (fr) 2007-10-05 2008-09-01 Procédé de polarisation d'un élément piézoélectrique

Country Status (2)

Country Link
DE (1) DE102007047657B3 (fr)
WO (1) WO2009047048A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014086611A1 (fr) * 2012-12-07 2014-06-12 Epcos Ag Procédé de fabrication d'un composant électronique
DE102012107343B4 (de) 2012-08-09 2018-11-22 Epcos Ag Verfahren zur Polung eines Vielschichtbauelements

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011081161A1 (de) 2011-08-18 2013-02-21 Continental Automotive Gmbh Ansteuerung und Ansteuerverfahren für einen piezoelektrischen Aktor
FR2990998B1 (fr) 2012-05-23 2016-02-26 Continental Automotive France Procede de pilotage d'au moins un actionneur piezoelectrique d'injecteur de carburant d'un moteur a combustion interne
FR3002592B1 (fr) 2013-02-26 2016-09-16 Continental Automotive France Procede de pilotage d'un injecteur piezoelectrique de carburant d'un moteur a combustion interne de vehicule, comportant une etape de polarisation de l'actionneur piezoelectrique
FR3009031B1 (fr) 2013-07-29 2015-08-21 Continental Automotive France Procede et dispositif de repolarisation d'un actionneur piezoelectrique d'un injecteur d'un moteur a combustion interne d'un vehicule ayant ete utilise

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003065468A2 (fr) * 2002-02-01 2003-08-07 Siemens Aktiengesellschaft Procede de pretraitement d'une ceramique piezoelectrique et procede d'ajustage d'une soupape d'injection
WO2006109501A1 (fr) * 2005-03-18 2006-10-19 Ngk Insulators, Ltd. Procede d'inspection d'element piezoelectrique, dispositif d'inspection et procede de traitement de polarisation

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1690844B1 (fr) * 2003-11-26 2012-11-21 Kyocera Corporation Ceramique piezo-electrique et dispositif piezo-electrique lamine
DE102004021955A1 (de) * 2004-05-04 2005-12-01 Siemens Ag Verfahren zum Polarisieren einer Piezokeramik
DE102004024120A1 (de) * 2004-05-14 2005-12-08 Siemens Ag Verfahren zum Polarisieren eines piezoelektrischen Aktors, insbesondere eines Stapelaktors, sowie Stapelaktor
DE102005023370A1 (de) * 2005-05-20 2006-11-23 Siemens Ag Piezoelektrischer oder elektrostriktiver Stack mit erhöhter Lebensdauer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003065468A2 (fr) * 2002-02-01 2003-08-07 Siemens Aktiengesellschaft Procede de pretraitement d'une ceramique piezoelectrique et procede d'ajustage d'une soupape d'injection
WO2006109501A1 (fr) * 2005-03-18 2006-10-19 Ngk Insulators, Ltd. Procede d'inspection d'element piezoelectrique, dispositif d'inspection et procede de traitement de polarisation
US20080030102A1 (en) * 2005-03-18 2008-02-07 Ngk Insulators, Ltd. Inspection method, inspection apparatus, and polarization method for piezoelectric element

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012107343B4 (de) 2012-08-09 2018-11-22 Epcos Ag Verfahren zur Polung eines Vielschichtbauelements
WO2014086611A1 (fr) * 2012-12-07 2014-06-12 Epcos Ag Procédé de fabrication d'un composant électronique
JP2015536580A (ja) * 2012-12-07 2015-12-21 エプコス アクチエンゲゼルシャフトＥｐｃｏｓ Ａｇ 電子部品の製造方法
US9755138B2 (en) 2012-12-07 2017-09-05 Epcos Ag Method for producing an electronic component

Also Published As

Publication number Publication date
DE102007047657B3 (de) 2009-04-09

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