WO2000045444A1 - Antriebsvorrichtung - Google Patents
Antriebsvorrichtung Download PDFInfo
- Publication number
- WO2000045444A1 WO2000045444A1 PCT/EP2000/000495 EP0000495W WO0045444A1 WO 2000045444 A1 WO2000045444 A1 WO 2000045444A1 EP 0000495 W EP0000495 W EP 0000495W WO 0045444 A1 WO0045444 A1 WO 0045444A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- drive device
- spring
- switch
- resonance frequency
- piezo actuator
- Prior art date
Links
- 230000010355 oscillation Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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
- H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
- H02N2/06—Drive circuits; Control arrangements or methods
- H02N2/065—Large signal circuits, e.g. final stages
- H02N2/067—Large signal circuits, e.g. final stages generating drive pulses
-
- 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
Definitions
- the invention relates to a drive device according to the preamble of claim 1.
- the starting point of the invention is an electroactic motor according to EP 0 552 346 B1 and DE 94 19 802 Ul.
- the piezo actuators used there and the mechanical drive components they move form a first spring-mass system, the drive components of which drive a second spring-mass system.
- Each of these spring-mass systems has a natural frequency, the spring-mass system comprising the piezo actuators having a relatively high resonance frequency in comparison to the other spring-mass system. It is assumed that the spring-mass system comprising the piezo actuator has the highest efficiency in resonance mode.
- the piezo actuators constantly operate at the resonance frequency of their spring-mass system, but the drive components only drive the driven spring-mass system for a relatively short time, the efficiency of the drive device is thereby relatively low. Since the frequency difference between the two resonance frequencies is considerable, there is also the effect that the spring-mass system comprising the piezo actuators goes out of resonance and thus the advantages of resonance operation are canceled.
- FIG. 1 shows a driving and driven spring-mass system with the piezo actuators contracted
- FIG. 1 shows the device of Figure 1 expanding
- FIG. 4 shows a first embodiment of a circuit
- FIG. 5 shows a second embodiment of a circuit
- FIG. 6 shows a third embodiment of a circuit
- FIGS. 7 to 10 different possible embodiments of the Hull curves
- FIGS 11 to 15 further embodiments of the circuit
- FIG. 16 shows a diagram to explain the mode of operation of the circuit according to FIG. 11
- a first arch spring 3 is arranged on a rigid foundation 7, between which a stack 4 is held taut by piezo actuators.
- a further arch spring 2 is arranged on the foundation, which carries a mass 1.
- the arch spring 3 has a contact surface 9 on the end face, which has a contact surface 9 'the mass 1 stands opposite Stack 4 is supplied with current via lines 5, 6 by an oscillation circuit (not shown).
- the bow spring 3 and the stack 4 form a first driving spring-mass system, while the bow spring 2 and the mass 1 form a second driven spring-mass system.
- the mass 1 moves in the direction of the double arrow 10 to the left.
- the stack 4 of the piezo actuators is drawn in here, that is to say without a power supply.
- energy is supplied to the stack 4 so that it expands to the right.
- the contact surface 9 ' is moved to the right, i. H. mass 1 moves in the direction of the double arrow to the right.
- the stack 4 of the piezo actuators is put out of operation. After the maximum amplitude of mass 1 to the right is reached, mass 1 moves to the left again, repeating the procedure described.
- the first spring-mass system oscillates in its natural frequency.
- the stack 4 can be switched on and off by a sensor 8 which is arranged on one of the contact surfaces 9, 9 '.
- the capacitors C1 and C2, the inductance L1 and the resistor R1 represent the equivalent circuit diagram of the first spring-mass system, which comprises the piezo actuator. Cl is inversely proportional to the spring constant of the arc spring 3, the inductance L1 is proportional to the moving mass of the first spring-mass system and Resistance R1 is proportional to the mechanical active power of the drive device.
- the second capacitance C2 essentially represents the static piezo capacitance plus external switching capacitances.
- the first spring-mass system is illustrated by M.
- an inductor L2 is connected in parallel to the piezo actuator.
- C2 and L2 thus form a parallel resonant circuit E with a predetermined resonance frequency.
- This resonance frequency is chosen so that it corresponds to the resonance frequency of the second spring-mass system.
- C2 and L2 generate a sinusoidal envelope 10 for the high-frequency vibrations 11 of the first spring-mass system.
- the frequency of the oscillating circuit E consisting of C2 and L2 corresponds approximately to the resonance frequency of the second spring-mass system in the exemplary embodiment according to FIGS. 1 and 2 formed by the mass 1 and the arc spring 2.
- the resonance frequency of the oscillating circuit M can be 50 kHz, for example amount, while that of the resonant circuit E is, for example, 5 kHz.
- the inductance L2 is formed by a transformer T, the side of which can be connected to a DC voltage source V via a switch S1.
- the switch S1 is controlled by a control circuit 12, to which the current actual amplitudes of the high-frequency oscillation 11 and the desired amplitude of the low-frequency oscillation 10 are supplied.
- the actual and target amphtudes are compared with one another and, depending on this comparison, the switches S1 are opened or closed.
- the energy supplied to the resonant circuit E and thus the shape of the envelope 10 are thus determined. This is illustrated by the different shape of the envelopes 10 m in FIGS. 7, 8 and 9.
- the energy supply to the resonant circuit E by closing the switch S1 takes place when the envelope curve 10 has its amplitude minimum If an amount of energy 12 is fed in, an envelope 10 is obtained. If a larger amount of energy 12 'is added, an envelope 10' of greater amplitude results.
- the actual amplitude is tapped directly at the piezo actuator itself.
- a further piezo element C3 can be attached to and isolated from the piezo actuator, to which the vibrations of the piezo actuator are pressed and which thus supplies the control circuit 12 with a value that is proportional to the actual amplitude.
- FIG. 11 corresponds to that of FIG. 4, but with the difference that a switch S2 is additionally connected in the resonant circuit E. Its mode of operation is discussed in connection with FIG. 16.
- the circuit according to FIG. 12 differs from that according to FIG. 11 in that several piezo actuators C2], C2 2 , C2 3 and C2 are connected in parallel, which can be a stack 4 in each case. These are preferably the feed actuators and the spread actuators according to EP 0 552 346 B1.
- the circuit according to FIG. 13 differs from that according to FIG. 11 in that four piezo actuators or four stacks of such actuators are connected in series.
- these actuators are connected in a star connection.
- both the frequency of the resonant circuit E and that of the resonant circuit M can be changed.
- the secondary winding of the transformer T has a number of taps which can be switched separately into the resonant circuit E via switches S2j, S2 2 ,..., S2 m , which means that the size of the inductance L2 can be changed.
- the frequency of the envelope 10 can be changed.
- the change in the size of the inductance L2 takes place gradually.
- a continuous change in the inductance L2 is shown in FIG. 6, where an inductor D is additionally arranged on the transformer T.
- the current flow through the choke D can be changed by means of a stepless switch S3, represented here by a transistor which is controlled by the control circuit 12.
- 16 has a sinusoidal rising edge 14, a rectilinear section 15 and a sinusoidal falling edge 16.
- the switch S2 is closed and the sinusoidal curve is determined by the desired amplitude. If the maximum amplitude of the envelope 10 is reached, the switch S2 is opened, whereby the resonant circuit M is interrupted and all the energy of this resonant circuit is stored in the capacitance C2.
- the switch S2 is closed and the sinusoidal falling edge 16 results from the specification of the target amplitude.
Landscapes
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU25434/00A AU2543400A (en) | 1999-01-29 | 2000-01-22 | Drive device |
EP00903616A EP1086499A1 (de) | 1999-01-29 | 2000-01-22 | Antriebsvorrichtung |
JP2000596607A JP2002536146A (ja) | 1999-01-29 | 2000-01-22 | 駆動装置 |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19903484 | 1999-01-29 | ||
DE19903484.2 | 1999-01-29 | ||
DE19905191 | 1999-02-06 | ||
DE19905191.7 | 1999-02-06 | ||
DE19937209.8 | 1999-08-06 | ||
DE19937209A DE19937209A1 (de) | 1999-01-29 | 1999-08-06 | Antriebsvorrichtung |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2000045444A1 true WO2000045444A1 (de) | 2000-08-03 |
WO2000045444A8 WO2000045444A8 (de) | 2001-04-05 |
Family
ID=27218941
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2000/000495 WO2000045444A1 (de) | 1999-01-29 | 2000-01-22 | Antriebsvorrichtung |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1086499A1 (de) |
JP (1) | JP2002536146A (de) |
CN (1) | CN1300447A (de) |
AU (1) | AU2543400A (de) |
DE (1) | DE19937209A1 (de) |
WO (1) | WO2000045444A1 (de) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7224099B2 (en) | 2004-04-20 | 2007-05-29 | Elliptec Resonant Actuator Aktiengesellschaft | Molded piezoelectric apparatus |
GB2486560A (en) * | 2010-12-14 | 2012-06-20 | Bosch Gmbh Robert | Piezoelectric sound element |
EP3051687A1 (de) * | 2015-02-02 | 2016-08-03 | Seiko Epson Corporation | Treiberschaltung für piezoelektrisches element und roboter |
CN111472921A (zh) * | 2020-03-04 | 2020-07-31 | 温州大学 | 基于质量弹簧系统的波浪能压电发电浮标 |
US11234803B2 (en) | 2016-12-02 | 2022-02-01 | Shanghai Shift Electrics Co., Ltd. | Electric cleaning and care appliance, pressure alarming method and apparatus for the appliance |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ATE302995T1 (de) | 2001-06-06 | 2005-09-15 | Miniswys Sa | Piezoelektrischer antrieb |
DE10245324A1 (de) * | 2002-09-27 | 2004-04-08 | Abb Patent Gmbh | Ultraschall-Stehwellen-Zerstäuberanordnung |
DE10260363A1 (de) * | 2002-12-20 | 2004-07-08 | Robert Bosch Gmbh | Aktormodul mit einem piezoelektrischen, elektrostriktiven oder magnetostriktiven Aktor |
DE102015009833B3 (de) * | 2015-08-03 | 2017-01-19 | Kocks Technik Gmbh & Co Kg | "Lager für einen Walzenzapfen einer Walze oder für eine Walzenwelle eines Walzgerüsts und Walzgerüst" |
-
1999
- 1999-08-06 DE DE19937209A patent/DE19937209A1/de not_active Withdrawn
-
2000
- 2000-01-22 JP JP2000596607A patent/JP2002536146A/ja active Pending
- 2000-01-22 AU AU25434/00A patent/AU2543400A/en not_active Abandoned
- 2000-01-22 CN CN00800095A patent/CN1300447A/zh active Pending
- 2000-01-22 EP EP00903616A patent/EP1086499A1/de not_active Withdrawn
- 2000-01-22 WO PCT/EP2000/000495 patent/WO2000045444A1/de not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
No relevant documents disclosed * |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7224099B2 (en) | 2004-04-20 | 2007-05-29 | Elliptec Resonant Actuator Aktiengesellschaft | Molded piezoelectric apparatus |
GB2486560A (en) * | 2010-12-14 | 2012-06-20 | Bosch Gmbh Robert | Piezoelectric sound element |
GB2486560B (en) * | 2010-12-14 | 2017-02-22 | Bosch Gmbh Robert | Sound transducer with at least one piezo element |
EP3051687A1 (de) * | 2015-02-02 | 2016-08-03 | Seiko Epson Corporation | Treiberschaltung für piezoelektrisches element und roboter |
US9712087B2 (en) | 2015-02-02 | 2017-07-18 | Seiko Epson Corporation | Piezoelectric element drive circuit and robot |
US11234803B2 (en) | 2016-12-02 | 2022-02-01 | Shanghai Shift Electrics Co., Ltd. | Electric cleaning and care appliance, pressure alarming method and apparatus for the appliance |
CN111472921A (zh) * | 2020-03-04 | 2020-07-31 | 温州大学 | 基于质量弹簧系统的波浪能压电发电浮标 |
Also Published As
Publication number | Publication date |
---|---|
WO2000045444A8 (de) | 2001-04-05 |
AU2543400A (en) | 2000-08-18 |
CN1300447A (zh) | 2001-06-20 |
JP2002536146A (ja) | 2002-10-29 |
DE19937209A1 (de) | 2000-08-10 |
EP1086499A1 (de) | 2001-03-28 |
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