EP1500183A2 - Piezomoteur - Google Patents

Piezomoteur

Info

Publication number
EP1500183A2
EP1500183A2 EP03727325A EP03727325A EP1500183A2 EP 1500183 A2 EP1500183 A2 EP 1500183A2 EP 03727325 A EP03727325 A EP 03727325A EP 03727325 A EP03727325 A EP 03727325A EP 1500183 A2 EP1500183 A2 EP 1500183A2
Authority
EP
European Patent Office
Prior art keywords
resonator
piezomotor
movable element
operating state
state variable
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.)
Withdrawn
Application number
EP03727325A
Other languages
German (de)
English (en)
Inventor
Kai Wolf
Peter C. Varadi
Björn MAGNUSSEN
Benjamin Hagemann
Dieter Schuler
Erick Davidson
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.)
Pantec GmbH
Original Assignee
Elliptec Resonant Actuator AG
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
Priority claimed from DE10227509A external-priority patent/DE10227509A1/de
Application filed by Elliptec Resonant Actuator AG filed Critical Elliptec Resonant Actuator AG
Publication of EP1500183A2 publication Critical patent/EP1500183A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • H02N2/10—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing rotary motion, e.g. rotary motors
    • H02N2/103—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing rotary motion, e.g. rotary motors by pressing one or more vibrators against the rotor
    • 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
    • H02N2/0005—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing non-specific motion; Details common to machines covered by H02N2/02 - H02N2/16
    • H02N2/001—Driving devices, e.g. vibrators
    • H02N2/002—Driving devices, e.g. vibrators using only longitudinal or radial modes
    • 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
    • H02N2/0005—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing non-specific motion; Details common to machines covered by H02N2/02 - H02N2/16
    • H02N2/005—Mechanical details, e.g. housings
    • H02N2/0055—Supports for driving or driven bodies; Means for pressing driving body against driven body
    • H02N2/006—Elastic elements, e.g. springs

Definitions

  • Piezomotors of the type mentioned at the outset are known from the prior art in a large number.
  • piezoelectric components which perform mechanical vibrations when a suitable electrical voltage is applied are coupled to a resonator, which in turn bears against a movable element.
  • the resonator converts the vibrations of the piezoelectric component into preferably elliptical vibrations of the contact area of the resonator with the rotor.
  • the movable element preferably moves in a first direction when a first voltage with a first frequency is applied to the piezoelectric component, in a preferably opposite second direction when a second voltage is applied with the piezoelectric component.
  • the operating state variables are preferably understood as variables averaged over at least 10 periods of the control signal.
  • the change is preferably irreversible.
  • the change in the operating state variable takes place without external influence. This preferably means that the change in the respective operating state variable is achieved without a change in the control signal of the piezo element.
  • this run-in or operating behavior of the resonator is preferably measured by measuring the changing vibration modes, the frequencies, the efficiency, etc.
  • the running-in behavior of the Resonators can be determined.
  • the thrust output of the piezo motor according to the invention can then be kept at least constant by means of a specific change in an operating state variable, preferably by adapting the operating frequency to the changed resonance frequency.
  • the piezo motor is mounted in a particularly simple manner, which is able, on the one hand, to compensate for the run-in-related change in the operating state variables of the piezo motor and to keep the contact pressure constant in the contact area.
  • the vibrations of the spring which overlap with the vibrations of the resonator, are reduced.
  • the angle of incidence of the resonator on the movable element is measured in the contact area of both components. It is spanned on the one hand by the surface of the movable element in the drive point and on the other hand by the vibratory direction of movement of the resonator at the corresponding contact point.
  • the change in at least one operating state variable counteracts a change in another operating state variable which has occurred without external influence.
  • Another object of the present invention is a method for running in a piezo motor, characterized in that the resonator and the movable element are moved against each other under external influence before the motor starts its intended operation, so that the contact area between the resonator and the driven element grinds you ,
  • FIGS. 1-7 The invention is explained below with reference to FIGS. 1-7.
  • the figures merely represent embodiments of the invention and in no way limit the inventive concept. The following are shown in detail:
  • FIG. 6b shows a side view of a third leg spring
  • FIGS. 1 a - 1 e show a piezomotor 1, consisting of a resonator 2 having two at least partially circular-section legs 8 with the length LA and a piezoelectric component 3.
  • the legs in the form of sections of a circle have a maximum width LF.
  • the piezoelectric component 3 has a width LD, a height LC and a length LB and is clamped into the recess of the resonator 2 encompassed by the legs 8 such that a partial height LE of the piezoelectric component 3 protrudes from the plane formed by the resonator surface.
  • a leg spring 7 is also positively connected to the resonator 2.

Landscapes

  • General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)

Abstract

L'invention concerne un piézomoteur comportant un élément piézoélectrique relié à un résonateur, ainsi qu'un élément mobile coopérant avec le piézomoteur. L'invention est caractérisée en ce qu'au moins un paramètre d'état varie durant le temps de fonctionnement. La présente invention porte également sur un procédé pour éviter les pannes dudit piézomoteur.
EP03727325A 2002-04-22 2003-04-17 Piezomoteur Withdrawn EP1500183A2 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10217963 2002-04-22
DE10217963 2002-04-22
DE10227509 2002-06-19
DE10227509A DE10227509A1 (de) 2002-04-22 2002-06-19 Piezomotor
PCT/EP2003/004072 WO2003090338A2 (fr) 2002-04-22 2003-04-17 Piezomoteur

Publications (1)

Publication Number Publication Date
EP1500183A2 true EP1500183A2 (fr) 2005-01-26

Family

ID=29251780

Family Applications (2)

Application Number Title Priority Date Filing Date
EP03727325A Withdrawn EP1500183A2 (fr) 2002-04-22 2003-04-17 Piezomoteur
EP03732284A Expired - Lifetime EP1520338B1 (fr) 2002-04-22 2003-04-22 Piezomoteur

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP03732284A Expired - Lifetime EP1520338B1 (fr) 2002-04-22 2003-04-22 Piezomoteur

Country Status (4)

Country Link
EP (2) EP1500183A2 (fr)
JP (1) JP2005532769A (fr)
AU (2) AU2003233991A1 (fr)
WO (2) WO2003090338A2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006019871B4 (de) * 2006-04-28 2008-01-31 Audi Ag Sitz für ein Kraftfahrzeug
DE102007005041B4 (de) 2007-01-26 2011-09-22 Elliptec Resonant Actuator Ag Piezomotor mit Federungseinrichtung
DE102007021338A1 (de) * 2007-05-07 2008-11-13 Robert Bosch Gmbh Piezoelektrische Antriebsvorrichtung
DE102010001206A1 (de) 2010-01-26 2011-07-28 Robert Bosch GmbH, 70469 Verstellvorrichtung und verstellbare Kraftfahrzeugkomponente

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2445685B2 (de) * 1974-09-25 1977-09-22 Fink, Rudolf, Dipl.-lng.; Hoeffgen, Dietrich, Dipl.-Phys. Dr.rer.nat; 8672 Selb Verfahren zur herstellung eines keramikresonators
DE3309239A1 (de) * 1983-03-15 1984-09-20 Siemens AG, 1000 Berlin und 8000 München Piezoelektrischer motor
US5216313A (en) * 1988-12-16 1993-06-01 Alps Electric Co., Ltd. Ultrasonic wave linear motor
JPH05219762A (ja) * 1992-02-06 1993-08-27 Canon Inc 振動波モータ
GB2365206B (en) * 1997-09-05 2002-04-03 1 Ltd Piezoelectric driver device with integral sensing layer
JPH11191976A (ja) * 1997-12-26 1999-07-13 Asmo Co Ltd モータの駆動回路
US6870304B2 (en) * 2000-03-23 2005-03-22 Elliptec Resonant Actuator Ag Vibratory motors and methods of making and using same
JP3857020B2 (ja) * 2000-05-12 2006-12-13 富士通株式会社 圧電アクチュエータおよび情報記憶装置

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO03090338A3 *

Also Published As

Publication number Publication date
WO2003090338A3 (fr) 2004-04-08
JP2005532769A (ja) 2005-10-27
EP1520338B1 (fr) 2012-09-26
WO2003090339A2 (fr) 2003-10-30
EP1520338A2 (fr) 2005-04-06
WO2003090338A2 (fr) 2003-10-30
WO2003090339A3 (fr) 2004-05-27
AU2003239810A1 (en) 2003-11-03
AU2003233991A1 (en) 2003-11-03

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Inventor name: SCHULER, DIETER

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