WO2012136396A1 - Piézo-transformateur, procédé de fabrication d'un piézo-transformateur et onduleur équipé d'un piézo-transformateur - Google Patents

Piézo-transformateur, procédé de fabrication d'un piézo-transformateur et onduleur équipé d'un piézo-transformateur Download PDF

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Publication number
WO2012136396A1
WO2012136396A1 PCT/EP2012/051590 EP2012051590W WO2012136396A1 WO 2012136396 A1 WO2012136396 A1 WO 2012136396A1 EP 2012051590 W EP2012051590 W EP 2012051590W WO 2012136396 A1 WO2012136396 A1 WO 2012136396A1
Authority
WO
WIPO (PCT)
Prior art keywords
phases
input
piezoelectric transducer
voltage
conductive layer
Prior art date
Application number
PCT/EP2012/051590
Other languages
German (de)
English (en)
Inventor
Vicente Garcia Alvarez
Niko ZEBA
Original Assignee
Robert Bosch 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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2012136396A1 publication Critical patent/WO2012136396A1/fr

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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
    • H10N30/802—Circuitry or processes for operating piezoelectric or electrostrictive devices not otherwise provided for, e.g. drive circuits
    • 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
    • H10N30/07—Forming of piezoelectric or electrostrictive parts or bodies on an electrical element or another base
    • H10N30/072—Forming of piezoelectric or electrostrictive parts or bodies on an electrical element or another base by laminating or bonding of piezoelectric or electrostrictive bodies
    • 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
    • H10N30/07—Forming of piezoelectric or electrostrictive parts or bodies on an electrical element or another base
    • H10N30/072—Forming of piezoelectric or electrostrictive parts or bodies on an electrical element or another base by laminating or bonding of piezoelectric or electrostrictive bodies
    • H10N30/073—Forming of piezoelectric or electrostrictive parts or bodies on an electrical element or another base by laminating or bonding of piezoelectric or electrostrictive bodies by fusion of metals or by adhesives
    • 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
    • H10N30/40—Piezoelectric or electrostrictive devices with electrical input and electrical output, e.g. functioning as transformers

Definitions

  • Piezotransformer method for producing a piezotransformer and inverter with a piezotransformer
  • the present invention relates to a piezoelectric transformer with at least two output phases electrically isolated from each other.
  • the transformation of an AC voltage of a certain voltage level into an AC voltage of a different voltage level is an important task.
  • the mains voltage which is usually 220 volts or 1 10 volts, must be transformed to the operating voltage of electrical equipment.
  • the operating voltage may be lower than the mains voltage, for example at 12 volts, or higher than the mains voltage, for example at 400 volts.
  • piezo transformers Another possibility for voltage transformation is offered by piezo transformers, which rely on a purely mechanical coupling of an input transducer with a
  • Output converters are based. There are the input converter and the
  • Oscillation can be offset when an AC voltage is applied to the element, or which can generate an AC voltage when the element is mechanically vibrated. If an input element which is brought into mechanical oscillation via an alternating voltage is then coupled mechanically with an output element which is set in oscillation by the input element, the output element generates an alternating voltage which corresponds to a voltage equal to the input voltage at the input element.
  • the transformation ratio of the input voltage to the output voltage is determined by the mechanical design of the piezotransformer.
  • Piezotransformatoren offer a very high efficiency of up to 90%, a very high transformation ratio of up to 1/1000 and a small size.
  • a piezoelectric transformer with an input-side piezoelectric transducer, an output-side piezoelectric transducer with at least two
  • Phases at least a first electrically non-conductive layer, which is arranged between the input-side piezoelectric transducer and the output-side piezoelectric transducer and which mechanically couples the input-side piezoelectric transducer and the output-side piezoelectric transducer, and at least one second electrically non-conductive layer, which between the Phases of the output side piezoelectric transducer is arranged.
  • a method for producing a piezoelectric transformer comprising the steps of connecting an input-side piezoelectric transducer to a first electrically non-conductive layer, connecting at least two phases to one another
  • the finding underlying the present invention is that two piezoceramic layers can be galvanically isolated from each other by providing an electrically non-conductive layer between these two piezoceramic layers.
  • the idea underlying the present invention is now to take this knowledge into account and to provide a single piezoceramic transformer whose output-side piezoelectric transducer has at least two phases, these two phases being insulated from one another by an electrically non-conductive layer.
  • the at least two phases are arranged in parallel. In a further embodiment, the at least two phases are arranged in series.
  • At least three phases are provided and between two adjacent phases, a second electrically non-conductive layer is provided in each case. If at least three phases insulated from one another are provided, it becomes possible with the aid of the piezotransformer to drive components of an electrical device which has a plurality of mutually independent phases. This is the case, for example, with inverters for multiphase electric motors. If such an inverter drives a polyphase electric motor, then the ground potential of each individual phase varies depending on the instantaneous state of the electric motor. In order to be able to control the independent phases, therefore, a voltage supply with an independent ground is required for each phase. By an efindungsgze touch piezotransformer these voltages can be easily and efficiently provided.
  • the first electrically non-conductive layer and / or the second electrically non-conductive layer has a ceramic layer. If the non-conductive layers are provided as ceramic layers, it is possible to produce them together with the piezoelectric transducers or the phases in a common process. This allows an efficient and cost-effective production of the piezoelectric transformer.
  • the non-conductive layers may also be formed as constituents of the piezoceramics of the input transducer and of the output transducer.
  • the insulation voltage can by a suitable dimensioning of
  • Piezocemics can be adjusted.
  • the non-conductive layers may also consist of other materials, for example plastics. These materials can be used in
  • isolation voltage can be selected.
  • the first electrically nonconductive layer and / or the second electrically nonconductive layer have an insulation voltage of 1 kV to 10 kV, in particular of 2 kV to 6 kV and in particular of 2.8 kV.
  • the input-side piezoelectric transducer and / or the phases of the output-side piezoelectric transducer have a rated voltage of 12 V to 1000 V, in particular from 250 V to 800 V, in particular from 300 V to 500 V. If different input voltages are provided for the piezotransformer, this can be used in a large number of applications.
  • the provision of different output voltages makes it possible to supply different electrical devices with the piezotransformer.
  • the piezoelectric transformer can also be used to supply fluorescent tubes in, for example, LCD screens, with a rated voltage of up to 400 V.
  • the input-side piezoelectric transducer and each of the phases have different nominal voltages or have the
  • the input-side piezoelectric transducer, the first electrically non-conductive layer, and the at least two phases of the output-side piezoelectric transducer are connected by means of sintering.
  • said elements may be joined by gluing, soldering or the like.
  • Fig. 1 shows an embodiment of a piezoelectric transformer according to the invention
  • Fig. 2 shows another embodiment of an inventive
  • FIG. 3 shows a further embodiment of an inventive
  • Fig. 4 shows an embodiment of an inverter with an inventive
  • FIG. 1 shows an embodiment of a piezoelectric transformer 1 according to the invention.
  • FIG. 1 shows by reference numeral 2 an input-side piezoelectric transducer which is mechanically coupled to a first electrically non-conductive layer 4.
  • the first electrically non-conductive layer 4 is in turn connected to an output-side piezoelectric transducer 3, which consists of a first
  • Phase 3a and a second phase 3b which are isolated from each other by a second electrically non-conductive layer 3c.
  • the two phases 3a and 3b are arranged in parallel with the second electrically non-conductive layer 3c opposite the input-side piezoelectric transducer 2 and the first electrically non-conductive layer 4.
  • the input-side piezoelectric transducer 2 is connected to a voltage source, which causes it to oscillate by means of an alternating voltage. Since the input-side piezoelectric transducer 2 via the first electrically non-conductive layer 4 mechanically with the output phases 3a and 3b of the output-side piezoelectric transducer. 3 is coupled, the mechanical vibration of the input-side piezoelectric transducer 2 is transferred to the phases 3a and 3b. The mechanical vibration causes in the phases 3a and 3b a change in size, which in turn by the
  • Piezoceramic of the phases 3a and 3b is converted into an electrical voltage.
  • the magnitude of the voltage is dependent on both the input voltage and the mechanical design of the piezoelectric transformer 1.
  • both the phases 3a and 3b, the piezoelectric transducers 2 and 3 and the electrically non-conductive layers 3c and 4 are provided of ceramic materials.
  • the non-conductive layers may also be provided of other materials, for example plastics, glass, or the like. It may depend on the needed
  • Insulating material can be selected.
  • the first non-conductive layer 4 is not provided as a separate layer, but an integral part of the input side
  • Piezoelectric transducer 2 A desired insulation voltage can be provided by suitable dimensioning of the piezoceramic of the input-side piezoelectric transducer 2.
  • the piezoceramic of the input side piezoelectric transducer 2 is not only used as a vibration generating element but also isolated the input side piezokermaischen converter electrically from the output side piezoelectric transducer.
  • the piezoelectric transformer 1 shown in Fig. 1 is provided for a nominal input voltage of 12 V and for an output voltage of the two phases 3a, 3b of 5 V. In a further embodiment, the piezoelectric transformer 1 shown in FIG.
  • the piezotransformer 1 of FIG. 1 can also be provided, for example, for a nominal output voltage of the two phases of 3.3 V, 12 V, 42 V, but also for substantially higher voltages of, for example, over 500 V.
  • the piezoelectric transformer 1 shown in FIG. 1 is also designed for powers of up to 15 W.
  • FIG. 2 shows another embodiment of a piezoelectric transformer according to the invention.
  • the piezoelectric transformer 1 shown in FIG. 2 differs from the piezoelectric transformer 1 shown in FIG. 1 in that the output side
  • piezoelectric transducer 3 has three phases 5, 6 and 7. Between each of the three phases 5, 6 and 7, an electrically non-conductive layer 13, 14 is provided. Furthermore, the piezoelectric transformer 1 shown in FIG. 2 differs from the piezoelectric transformer 1 shown in FIG. 1 in that the piezotransformer shown in FIG. 2 is designed for a rated input voltage of 400 V. The output voltage of the three phases 5, 6 and 7 is 12 V.
  • Such a performed piezoelectric transformer makes it possible, for example in one
  • Vehicle independent of a already existing in the vehicle 12 V electrical system to build a second 12 V electrical system, which consists of the high voltage battery of
  • Electric vehicle is powered.
  • This second 12 V electrical system can now be used to control the inverter for the electric machine and to operate the necessary sensors of the electric machine.
  • an independent of the existing 12 V electrical system of the vehicle operation of the electric machine is made possible.
  • Piezotransformators 1 adapted to other voltages of the vehicle high-voltage battery.
  • the input-side rated voltage of the piezoelectric transformer 1 may be between 250 V and 500 V, in particular the input side
  • FIG. 3 shows a further embodiment of a piezoelectric transformer 1 according to the invention.
  • the piezoelectric transformer 1 shown in FIG. 3 differs from the piezoelectric transformer 1 shown in FIG. 2 in that the three phases 10, 11 and 12 of the output-side piezoelectric transducer 3 do not , as shown in Fig. 2 in parallel, but arranged in series.
  • Such a piezoelectric transformer 1 can be adapted to specific material combinations or desired input or Ubernennprehensien. As a result, a flexible use of the piezotransformer 1 shown is possible.
  • FIG. 4 shows an embodiment of an inverter 17 according to the invention.
  • the inverter 17 according to the invention in FIG. 4 has a piezoelectric transformer 1 according to the invention, as shown in FIG.
  • the piezotransformer 1 in Fig. 4 has at each phase 5, 6 and 7 of the output-side piezoelectric transducer 3, two contacts 20-25, at which the generated AC voltage is tapped.
  • the AC voltage is supplied to each one of three rectifiers 30, 31 and 32.
  • Each of the rectifiers 30, 31 and 32 supplies the drive electronics 35, 36 and 37 for driving the driver components of one of the phases of an electric motor.
  • the input-side piezoceramic converter 2 of the piezotransformer 1 in the inverter 17 from FIG. 4 is coupled to an inverter 34, which converts the voltage of a high-voltage battery 33 into an alternating voltage.
  • the inverter 17 of Fig. 4 converts an input voltage of 400 V, as the
  • High-voltage battery 33 of an electric vehicle provides, in a 12 V
  • the inverter 17 from FIG. 4 thus makes it possible to supply the electronics, which contain the driver components of the motor phases, independently of a vehicle 12 V electrical system and to obtain the supply voltage for this electronics from the high-voltage battery 33 of the vehicle. This will make it possible for the
  • Electric motor of the electric vehicle to operate independently and self-sufficient from the existing 12 V electrical system and the existing 12 V battery of the vehicle.
  • a fault in the existing 12 V electrical system or the 12 V battery of the vehicle thus does not lead to a failure of the electric machine.
  • the electric vehicle could still be moved in such a case.
  • a piezoelectric transformer according to the invention can be used in any application which involves a transformation of alternating voltage from one
  • a piezoelectric transformer according to the invention is particularly suitable for use in aerospace applications and applications which requires a particularly low weight or volume of the components used.
  • Piezotransformatoren 1 are operated in parallel.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

L'invention concerne un piézo-transformateur (1) comprenant un convertisseur piézo-électrique côté entrée (2), un convertisseur piézo-électrique côté sortie (3) qui possède au moins deux phases (3a, 3b), au moins une première couche électriquement non conductrice (4) qui est disposée entre le convertisseur piézo-électrique côté entrée (2) et le convertisseur piézo-électrique côté sortie (3) et qui relie mécaniquement le convertisseur piézo-électrique côté entrée (2) et le convertisseur piézo-électrique côté sortie (3), et au moins une deuxième couche électriquement non conductrice (3c) qui est disposée entre les phases (3a, 3b) du convertisseur piézo-électrique côté sortie (3). L'invention concerne en outre un procédé de fabrication d'un piézo-transformateur, ainsi qu'un onduleur équipé d'un piézo-transformateur.
PCT/EP2012/051590 2011-04-05 2012-01-31 Piézo-transformateur, procédé de fabrication d'un piézo-transformateur et onduleur équipé d'un piézo-transformateur WO2012136396A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011006764A DE102011006764A1 (de) 2011-04-05 2011-04-05 Piezotransformator, Verfahren zum Herstellen eines Piezotransformators und Inverter mit einem Piezotransformator
DE102011006764.7 2011-04-05

Publications (1)

Publication Number Publication Date
WO2012136396A1 true WO2012136396A1 (fr) 2012-10-11

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DE (1) DE102011006764A1 (fr)
WO (1) WO2012136396A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106876574A (zh) * 2017-03-03 2017-06-20 合肥工业大学 一种阵列式压电变压器

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013100617B4 (de) 2013-01-22 2016-08-25 Epcos Ag Vorrichtung zur Erzeugung eines Plasmas und Handgerät mit der Vorrichtung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1220338A1 (fr) * 1999-06-01 2002-07-03 Beijing Hanzhiyuan Electron Co., Ltd. Transformateur piezo-electrique a structure composite multisortie en mode vibration d'extension
JP2004146503A (ja) * 2002-10-23 2004-05-20 Taiheiyo Cement Corp 圧電トランス素子
US20100277237A1 (en) * 2009-01-26 2010-11-04 Cymatics Laboratories Corp. Switchable power combiner

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1220338A1 (fr) * 1999-06-01 2002-07-03 Beijing Hanzhiyuan Electron Co., Ltd. Transformateur piezo-electrique a structure composite multisortie en mode vibration d'extension
JP2004146503A (ja) * 2002-10-23 2004-05-20 Taiheiyo Cement Corp 圧電トランス素子
US20100277237A1 (en) * 2009-01-26 2010-11-04 Cymatics Laboratories Corp. Switchable power combiner

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106876574A (zh) * 2017-03-03 2017-06-20 合肥工业大学 一种阵列式压电变压器
CN106876574B (zh) * 2017-03-03 2019-05-17 合肥工业大学 一种阵列式压电变压器

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