DE102013204102A1 - Electricity generation by electromechanical conversion - Google Patents

Electricity generation by electromechanical conversion

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Publication number
DE102013204102A1
DE102013204102A1 DE201310204102 DE102013204102A DE102013204102A1 DE 102013204102 A1 DE102013204102 A1 DE 102013204102A1 DE 201310204102 DE201310204102 DE 201310204102 DE 102013204102 A DE102013204102 A DE 102013204102A DE 102013204102 A1 DE102013204102 A1 DE 102013204102A1
Authority
DE
Germany
Prior art keywords
shaft
bearing bush
generator
electromechanical
transducer
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Withdrawn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
DE201310204102
Other languages
German (de)
Inventor
Carsten Schuh
Thorsten Steinkopff
Andreas Wolff
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.)
Siemens AG
Original Assignee
Siemens 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
Application filed by Siemens AG filed Critical Siemens AG
Priority to DE201310204102 priority Critical patent/DE102013204102A1/en
Publication of DE102013204102A1 publication Critical patent/DE102013204102A1/en
Withdrawn legal-status Critical Current

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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02NELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N2/00Electric machines in general using piezo-electric effect, electrostriction or magnetostriction
    • H02N2/18Electric machines in general using piezo-electric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators

Abstract

An electromechanical generator (11) has a bearing bush (12) in which a shaft (13) is rotatably mounted, wherein the bearing bush (12) is deformable depending on a rotational position of the shaft (13) and has at least one with the bearing bush ( 12) mechanically coupled electromechanical transducer (16). One method is to generate electrical energy from a rotation (R) of a shaft (13; 32) whereby the shaft (13; 32) inserted into a bearing bush (12) is rotated, rotating the shaft (13; 32) Bearing bush (12) is thrown outwardly in terms of angle of rotation locally and at least one electromechanical transducer (16, 22) is deformed by the bulging in order to generate an electrical voltage.

Description

  • The invention relates to an electromechanical generator, comprising at least one electromechanical converter. The invention further relates to a method for generating electrical energy by means of at least one electromechanical transducer which is deformed to generate an electrical voltage. The invention is particularly applicable to the power supply of surveillance systems, data transmission systems, or the like.
  • For power supply without current tap from a supply network ("self-sufficient power supply") independent electric generators are known, which have a non-electrically driven motor, e.g. Gasoline or diesel generators. For self-sufficient power supply also solar cells, wind turbines or hydroelectric turbines are known. However, such devices are comparatively large and complicated and may be heavily dependent on environmental influences, e.g. Solar cells from the sunlight.
  • It is also known that a deformation of an electromechanical transducer at this generates a voltage which can be tapped for supplying electrical consumers. As electromechanical transducers, e.g. piezoelectric transducer known.
  • It is the object of the present invention to overcome the disadvantages of the prior art, at least in part, and in particular to provide a possibility for self-sufficient power supply, which has a compact and simple design and / or allows high energy density in a small space.
  • This object is achieved according to the features of the independent claims. Preferred embodiments are in particular the dependent claims.
  • The object is achieved by an electromechanical generator, comprising a bearing bush, in which a shaft is rotatably arranged, wherein the bearing bush is elastically deformable depending on a rotational position of the shaft, and having at least one mechanically coupled to the bearing bush electromechanical transducer.
  • This makes it possible to generate electrical energy from a movement of a rotating shaft. In particular, this shaft may constitute part of a plant whose primary objective is to provide a mechanical drive, e.g. an engine. The electromechanical generator can be mounted in particular as an additional device for generating electricity on the shaft. The rotation of the shaft can be used, for example, to supply electrical energy for a self-sufficient supply, e.g. of surveillance systems, data transmission systems and the like.
  • The bearing bush is thus elastically deformable, in particular by means of the shaft, in comparison to an unclaimed, "normal" state. In particular, the elastic deformation may include at least one local elastic deformation on the bearing bush, in particular at least one outward "bulge". If the shaft rotates relative to the bearing bush, the at least one local deformation is rotated in the same way as a rotational position of the shaft on the bearing bush.
  • It is a development that the shaft is housed in the bearing bush in a press fit. The interference fit deforms the bushing in response to pressure acting on its inner surface.
  • Characterized in that the electromechanical transducer is mechanically coupled to the bearing bush, the local deformation of the bearing bush is transmitted to the electromechanical transducer, whereby it is deformed. The deformation of the electromechanical transducer in turn generates an electrical voltage to the electromechanical transducer, which can be tapped or used for the electrical supply of at least one load.
  • The electromechanical converter may in particular be arranged outside the bearing bush. He may contact the bearing bush, e.g. supported or at a small distance from it.
  • The bushing may e.g. Made of steel. The bearing bush may be coated on its inner side facing the shaft with an abrasion-resistant layer to avoid abrasion. The bushing may in particular be a hollow cylindrical body, but is not limited thereto. In particular, any body having a continuous hollow cylindrical cavity may also be used, e.g. a shape of an outer contour of this body may differ from a hollow cylindrical shape.
  • The at least one electromechanical transducer may comprise at least one piezoelectric, magnetostrictive and / or electrostrictive transducer.
  • It is an embodiment that at least one outside projection is provided on the shaft.
  • The outside projection may be an integral part or portion of the shaft or may be a self-contained element that is rotated with the shaft. An electrical energy generated per revolution of the shaft from the at least one electromechanical transducer may be at least approximately proportional to a number of outside projections, since a number of deformations of an electromechanical transducer depends on the number of local deformations it experiences during one revolution.
  • It is a development that a maximum diameter of the shaft including the at least one outer-side projection is greater than a normal diameter of the bearing bush. This causes in a particularly simple manner that the outer-side projection contacted the bearing bush locally and deformed or buckled outwards.
  • It is still an embodiment that the shaft (outside the projection) and the at least one outer-side projection contact an inner side of the bearing bush. As a result, an outside projection can be saved. It is a development of the fact that the shaft or the portion of the shaft located in the bearing bush runs in the center of the bearing bush. This may mean, in particular, that a longitudinal axis of the shaft (or of the section located in the bearing bush) is offset laterally or radially relative to a longitudinal axis of the bearing bush.
  • It is a further development that the shaft extends at least partially acentric in the bearing bush, has no outer projection (but, for example, has a purely cylindrical outer contour) and presses on the bearing bush or press-fitted with the bearing bush. This allows a particularly simple design. Such a shaft may be, for example, a conventional camshaft.
  • It is a refinement preferred for reducing friction between the shaft and the bearing bush, that the shaft is at least partially a two-part shaft with an inner shaft core and a shaft shell surrounding the shaft core, wherein shaft core and shaft shell separated by at least one roller bearing, in particular ball bearings are. Thus, in particular with an acentric bearing and rotation of the shaft, e.g. a conventional camshaft in the bearing bush friction with the bushing by avoiding a sliding friction and introduction of rolling friction can be reduced. The shaft core has in particular a circular shape in cross section, the shaft shell in cross section, at least on an inner contour facing the shaft core, likewise has a circular shape. The wave shell has in cross-section particularly preferably a ring shape.
  • It is a further embodiment that the shaft has at least two outer projections and only the outer projections contact an inner side of the bearing bush. The shaft outside these projections then does not contact the bearing bush, but serves only for the rotational movement of the projections along the bearing bush. This embodiment has the advantage that the shaft can be arranged collinear or in cross-section concentric with the bearing bush. Furthermore, the transducers can be uniformly deformed in a simple manner.
  • It is yet another embodiment that the at least one outer-side projection has at least one rotary element which is rotatably inserted into a trough of the shaft. As a result, a rolling friction of the outside projection with the bearing bush can be achieved, which allows a particularly simple way a small to negligible abrasion of the bearing bush. The at least one rotating element may e.g. a ball or a parallel to the shaft aligned needle or roller, which is inserted in a mating recess of the shaft. The rotary element may consist of the same material as the roller, or of a different material.
  • It is also an embodiment that the at least one outer-side projection has at least one cam. This allows a particularly simple embodiment of the generator.
  • It is also an embodiment that at least one of the electromechanical transducers is a radially to the bearing bush aligned linear transducer. As a result, in the case of a local deformation of the bearing bush at the location or in the vicinity of this linear transducer, the linear transducer can be compressed along its longitudinal extent and thus generate an electrical signal. In particular, the electromechanical linear transducer may be a piezoelectric linear transducer comprising a stack of linearly superimposed piezoelectric transducer elements, e.g. are also known in piezoelectric stack actuators ("stack converter").
  • It is a development that the linear transducer with one end (in particular a flat side) is mechanically coupled to the bearing bush, in particular is in contact therewith, and is supported with its other end to a rigid, stationary support member. As a result, a local deformation of the bearing bush can be converted into a deformation of the linear converter particularly effectively. In addition, the linear converter can so too be used as a support or strut for holding the bushing. In particular, a use of three or more linear transducers is advantageous, in particular if they are equidistantly angularly offset in a circumferential direction about a longitudinal axis of the bearing bush. The linear transducer may in particular be oriented so that its longitudinal axis is aligned radially to a longitudinal axis of the bearing bush.
  • It is still a development that the stationary support member is a rigid frame whose rigidity is particularly higher than a stiffness of the bearing bush. The frame may in particular be a firmly held or mounted hollow cylinder whose outer contour may basically be arbitrarily shaped.
  • It is also an embodiment that at least one of the electromechanical transducers is a bending transducer oriented tangentially to the bearing bush. This may in particular mean that a longitudinal axis of the bending transducer is aligned at least substantially tangentially to the bearing bush.
  • Thus, the local deformation of the bearing bush can be used to bend the bending transducer and to generate a usable electrical signal.
  • It is a development that the bending transducer is coupled with one end to the bearing bush. It is still a development that the bending transducer is centrally coupled to the bearing bush. It is also an embodiment that the bending transducer is firmly clamped at its at least one not coupled to the bearing bush end: the one with the end coupled to the bearing bush bending transducer can thus be clamped firmly at its other end and the center of the bearing bush coupled to bending transducer be firmly clamped at both ends. The bending transducer can rest directly on the bearing bush or be arranged at a small distance thereof.
  • It is also an embodiment that a gap between the bearing bush and the stationary support member, in particular frame, is filled with a filling compound. The filling compound prevents accidental dislocation or loosening of the elements embedded therein, in particular transducers, and also provides protection, e.g. against chemical stress, e.g. Corrosion. The filling compound may in particular be a pourable plastic, e.g. Epoxy resin, PE, PP and / or ABS etc.
  • It is a further development that a bending transducer embedded in the filling compound is held thereby, that is to say has no dedicated or additional holding or clamping. This can be dispensed with, since the filling compound holds the bending transducer and is also locally deformable by a deformation of the bearing bush. Thus, e.g. a filling material in the region of the local deformation of the bearing bush and the thus mechanically coupled portion of the bending transducer are mitverformt and consequently allow a deformation of the bending transducer, but at a greater distance thereof hold the bending transducer, e.g. at one or both ends.
  • The object is also achieved by a method for generating electrical energy from a rotation of a shaft, wherein a shaft inserted into a bushing is rotated, with the rotation of the shaft, the bearing bush angle of rotation locally bulged outward or bulged and by the buckling at least one electromechanical Transformer is deformed to generate an electrical voltage. The method allows the same advantages as the electromechanical generator and can be configured analogously.
  • Generally, a bushing may include any element or group of elements suitable for use in the electromechanical generator or method.
  • The above-described characteristics, features, and advantages of this invention, as well as the manner in which they will be achieved, will become clearer and more clearly understood in connection with the following schematic description of exemplary embodiments which will be described in detail in conjunction with the drawings. In this case, the same or equivalent elements may be provided with the same reference numerals for clarity.
  • 1 shows a cross section of an electromechanical generator according to a first embodiment;
  • 2 shows a cross section of an electromechanical generator according to a second embodiment; and
  • 3 shows a cross section of an electromechanical generator according to a third embodiment.
  • 1 shows a cross-section of an electromechanical generator 11 comprising a hollow cylindrical bearing bush 12 made of steel, in which a shaft 13 is rotatably arranged, as indicated by a direction of rotation R. A longitudinal axis L1 of the shaft 13 is parallel, but offset to a longitudinal axis L2 of the bearing bush 12 , The wave 13 is consequently azentrisch rotatable in the bearing bush 12 added. In a circular sector in cross-section trough 14 the wave 13 is a cylindrical roller or needle 15 used as a rotating element rotatable or rollable. The needle 15 thus provides an outside projection of the shaft 13 represents.
  • The wave 13 and the needle 15 are together in a press fit in the bearing bush 12 used, so that both the shaft at a first contact line K1 and the needle 15 at a second contact line K2 press the bearing bush locally outward. This will cause the bearing bush 12 in the region of the contact lines K1 and K2 elastically pressed locally outward and deformed or bulged. Specifically, this may have a common diameter D1 of the shaft 13 and the needle 15 larger than a normal diameter D2 of the undeformed bushing 12 , To insert the shaft 13 and the needle 15 like the bearing bush 12 for example, have been elastically deformed or pulled out of an unloaded or un-bent state out.
  • On an outside of the bearing bush 12 are four piezoelectric linear transducers 16 arranged, in such a way that they with respect to their longitudinal axis L3 radially to the bearing bush 12 and whose longitudinal axis L2 are aligned. Neighboring linear transducers 16 are angularly offset from each other by 90 °.
  • Here are the linear transducers 16 with her first face 17a on the bearing bush 12 and are therefore directly mechanically coupled with it. With its second, opposite end face 17b are the linear transducers 16 on an inner side of a rigid frame formed as a hollow cylindrical body 18 on. In particular, the linear transducers 16 between the bearing bush 12 and the stiff frame 18 glued and / or pressed.
  • At the rotation angle of the shaft shown 13 becomes the bearing bush 12 in the area of the upper linear transducer 16 and the lower linear transducer 16 locally deformed outwards or buckled, more in the area of the upper linear transducer 16 , During local deformation, the upper linear transducer becomes 16 (stronger) and the lower linear transducer 16 (weaker) compressed, as indicated by the double arrows, so that a usable electrical voltage can be tapped at them. The frame 18 remains virtually undeformed.
  • When rotating in the direction of rotation R shaft 13 she moves the needle 15 in the same direction of rotation R on the bearing bush 12 along. The needle 15 while doing a rolling motion in the trough 14 and on the bearing bush 12 from, whereby abrasion can be kept low. To further reduce abrasion, the bushing likes 12 Be configured accordingly inside, for example, have an abrasion-resistant layer. With rotation of the shaft 13 the contact lines K1 and K2 move analogously ("angle of rotation") about the longitudinal axis L2 of the bearing bush 12 so that the bearing bush 12 depending on the rotational position of the shaft 13 deformed or bulged to the outside. Already run over areas of the bearing bush 12 spring back elastically. Overall, thus successively opposite pairs of linear transducers 16 compressed or compressed, periodically at constant rotational speed. With exactly one revolution of the shaft 13 So will every linear converter 16 once through the needle 15 and once directly through the wave 13 compressed. Overall, over the period of rotation of the shaft 13 four times electrical signals are tapped or used.
  • 2 shows a cross-section of an electromechanical generator 21 according to a second embodiment. The generator 21 has a similar basic structure as the generator 11 , where now no linear transducer with the bearing bush 12 are mechanically coupled, but piezoelectric bending transducer 22 , which are in a potting compound 23 are shed. The potting compound 23 , eg epoxy, PC, PP, PE, etc., is in the space between the frame 18 and the bearing bush 12 filled. The bending transducer 22 So be in the potting compound 23 held.
  • The elongated bending transducer 22 are with respect to their longitudinal extent L4 tangential to the bearing bush 12 aligned and can contact or run along it at a small distance. The bending transducer 22 in particular have their smallest distance (including possibly a contact) to the bearing bush 12 at its center. The two ends of the bending transducer 22 are through the potting compound 23 practically fixed or clamped.
  • With a rotation of the shaft 13 becomes the bearing bush 12 also in the places or areas of the elongated bending transducer 22 locally deformed, and analogous to the generator 11 , Due to the local deformation or buckling of the bearing bush 12 will also be the bending transducer 22 centered with the potting compound surrounding it 23 elastically deformed. The bending transducer 22 can generate usable electrical signals. The elastic deformation of the potting compound 23 However, it is negligible at some distance from the bushing 12 , namely in particular in the region of the ends of the bending transducer 22 , Thus, the potting compound spans 23 the bending transducer 22 is practically bilateral, but is malleable enough to bend the bending transducer 22 permit.
  • 3 shows a cross-section of an electromechanical generator 31 according to a third embodiment. The generator 31 has a similar basic structure as the generator 11 , where now the wave 32 centric to the bearing bush 12 is mounted and a plurality of circumferentially about its longitudinal axis L1 equidistantly distributed outside projections in the form of cams 33 having. This is the wave 32 outside the cam 33 no longer in contact with the bearing bush 12 , The bearing bush 12 gets through each of the cams 33 deformed or bulged outwards. This will be shown in the eight cams 33 each of the linear transducers 16 now compressed with the same strength eight times per turn. The exemplary four linear transducers 16 are even operated simultaneously, so that their electrical signals are particularly easy to superimpose. The cams 33 are not by rolling friction, but by sliding friction on the bearing bush 12 moved along. It is therefore preferred that the bearing bush 12 provided on the inside with an abrasion-resistant, smooth coating.
  • Again, like a potting compound 23 in a space between the frame 18 and the bearing bush 12 be filled.
  • Although the invention has been further illustrated and described in detail by the illustrated embodiments, the invention is not so limited and other variations can be derived therefrom by those skilled in the art without departing from the scope of the invention.
  • Thus, the generator according to the first embodiment may have more than one needle.
  • Also, the generator according to the first embodiment may have a cam or cams instead of the needle (s), and the generator according to the third embodiment may have needles instead of the cams.
  • Generally, "on", "an", etc. may be taken to mean a singular or a plurality, in particular in the sense of "at least one" or "one or more" etc., unless this is explicitly excluded, e.g. by the expression "exactly one", etc.
  • Also, a number may include exactly the specified number as well as a usual tolerance range, as long as this is not explicitly excluded.
  • The present invention provides an electromechanical generator ( 11 ) with a bearing bush ( 12 ), in which a wave ( 13 ) is rotatably disposed, disclosed, wherein the bearing bush ( 12 ) depending on a rotational position of the shaft ( 13 ) is deformable and has at least one with the bearing bush ( 12 ) mechanically coupled electromechanical transducers ( 16 ) on. A method is used to generate electrical energy from a rotation (R) of a wave ( 13 ; 32 ), which in a bearing bush ( 12 ) wave ( 13 ; 32 ) is turned, with the rotation of the shaft ( 13 ; 32 ) the bushing ( 12 ) is buckled locally locally to the outside and by buckling at least one electromechanical transducer ( 16 ; 22 ) is deformed to generate an electrical voltage.

Claims (12)

  1. Electromechanical generator ( 11 ; 21 ; 31 ), comprising - a bearing bush ( 12 ) in which a wave ( 13 ; 32 ) is rotatably arranged, - wherein the bearing bush ( 12 ) depending on a rotational position of the shaft ( 13 ; 32 ) is deformable and - having at least one with the bearing bush ( 12 ) mechanically coupled electromechanical transducers ( 16 ; 22 ).
  2. Generator ( 11 ; 21 ; 31 ) according to claim 1, wherein - on the shaft ( 13 ; 32 ) at least one outside projection ( 15 ; 33 ) is available.
  3. Generator ( 11 ; 21 ) according to claim 2, wherein - the shaft ( 13 ) and the at least one outside projection ( 15 ) an inside of the bearing bush ( 12 ) to contact.
  4. Generator ( 31 ) according to claim 2, wherein - the shaft ( 32 ) at least two outboard projections ( 33 ) and - only the outside projections ( 33 ) an inside of the bearing bush ( 12 ) to contact.
  5. Generator ( 11 ; 21 ) according to one of claims 2 to 4, wherein the at least one outside projection at least one in a trough ( 14 ) the wave ( 13 ) rotatably inserted rotary member ( 15 ) having.
  6. Generator ( 31 ) according to one of claims 2 to 5, wherein the at least one outer-side projection at least one cam ( 33 ) having.
  7. Generator ( 11 ; 31 ) according to one of the preceding claims, wherein at least one of the electromechanical transducers is a radial to the bearing bush ( 12 ) aligned linear transducer ( 16 ).
  8. Generator ( 21 ) according to one of the preceding claims, wherein at least one of the electromechanical transducers is tangential to the bearing bush ( 12 ) aligned bending transducer ( 22 ).
  9. Generator ( 21 ; 31 ) according to one of the preceding claims, wherein a gap between the bushing ( 12 ) and the frame ( 18 ) with a filling material ( 23 ) is filled.
  10. Generator according to claim 1, wherein the shaft is rotatable acentrically in the bearing bush ( 12 ) is recorded.
  11. Generator according to claim 10, wherein the shaft is at least partially a two-part shaft with an inner shaft core and a shaft shell surrounding the shaft shell, wherein shaft core and shaft shell are separated by at least one rolling bearing.
  12. Method for generating electrical energy from a rotation (R) of a shaft ( 13 ; 32 ), whereby - in a bearing bush ( 12 ) wave ( 13 ; 32 ) is rotated, - with the rotation of the shaft ( 13 ; 32 ) the bushing ( 12 ) is thrown locally outwards at the same angle of rotation and - by buckling at least one electromechanical transducer ( 16 ; 22 ) is deformed to generate an electrical voltage.
DE201310204102 2013-03-11 2013-03-11 Electricity generation by electromechanical conversion Withdrawn DE102013204102A1 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105406764A (en) * 2015-11-24 2016-03-16 南京工业职业技术学院 Rotary type piezoelectric generator apparatus
DE102015100656B3 (en) * 2015-01-19 2016-04-21 Basbunar Hamdisana Piezoelectric generator and shaft-hub connection with such a piezoelectric generator
CN109546889A (en) * 2018-11-28 2019-03-29 厦门大学 A kind of piezoelectric type energy collection device of time-sharing multiplex
DE102017126206A1 (en) 2017-11-09 2019-05-09 Man Truck & Bus Ag Piezoelectric generator

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29614851U1 (en) * 1996-08-27 1996-11-21 Kranz Walter Piezo generator
DE10054398A1 (en) * 2000-11-02 2002-05-08 Peter Heller Device for generation of electrical energy by piezoelectric effect, has piezoelectric converters arranged around gearwheel located on shaft in outer part and teeth of gearwheel compress piezoelectric converters periodically
DE102007059179A1 (en) * 2007-12-06 2009-06-10 Helmut Obieglo Medium and/or material process flow guiding and/or influencing device i.e. power machine, has permanent magnet exerting cyclic movements in fixed housing and delivering generated electrical resulting potential as net energy
US20090169364A1 (en) * 2007-12-31 2009-07-02 Geoff Downton Progressive cavity apparatus with transducer and methods of forming and use
US20090315431A1 (en) * 2008-06-19 2009-12-24 Omnitek Partners Llc Electrical generators for low-frequency and time-varying rocking and rotary motion
DE102009001163A1 (en) * 2009-02-26 2010-09-02 Robert Bosch Gmbh Piezoelectric generator for drive device of vehicle, particularly motor vehicle for electricity generation, has piezo unit which is tensed for generating alternating current periodically
DE202008010899U1 (en) * 2008-08-14 2011-11-07 Manfred Rennings Generator with piezo disk generators for power generation
DE102010039167A1 (en) * 2010-08-10 2012-02-16 Deutsches Zentrum für Luft- und Raumfahrt e.V. Energy recovery system for, e.g. wind-power plant, has electromechanical transducers that are arranged along inner circumference of inner bearing ring which rotates together with rotating shaft
US8294336B2 (en) * 2005-10-18 2012-10-23 Board Of Regents, The University Of Texas Systems Piezoelectric windmill apparatus

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29614851U1 (en) * 1996-08-27 1996-11-21 Kranz Walter Piezo generator
DE10054398A1 (en) * 2000-11-02 2002-05-08 Peter Heller Device for generation of electrical energy by piezoelectric effect, has piezoelectric converters arranged around gearwheel located on shaft in outer part and teeth of gearwheel compress piezoelectric converters periodically
US8294336B2 (en) * 2005-10-18 2012-10-23 Board Of Regents, The University Of Texas Systems Piezoelectric windmill apparatus
DE102007059179A1 (en) * 2007-12-06 2009-06-10 Helmut Obieglo Medium and/or material process flow guiding and/or influencing device i.e. power machine, has permanent magnet exerting cyclic movements in fixed housing and delivering generated electrical resulting potential as net energy
US20090169364A1 (en) * 2007-12-31 2009-07-02 Geoff Downton Progressive cavity apparatus with transducer and methods of forming and use
US20090315431A1 (en) * 2008-06-19 2009-12-24 Omnitek Partners Llc Electrical generators for low-frequency and time-varying rocking and rotary motion
DE202008010899U1 (en) * 2008-08-14 2011-11-07 Manfred Rennings Generator with piezo disk generators for power generation
DE102009001163A1 (en) * 2009-02-26 2010-09-02 Robert Bosch Gmbh Piezoelectric generator for drive device of vehicle, particularly motor vehicle for electricity generation, has piezo unit which is tensed for generating alternating current periodically
DE102010039167A1 (en) * 2010-08-10 2012-02-16 Deutsches Zentrum für Luft- und Raumfahrt e.V. Energy recovery system for, e.g. wind-power plant, has electromechanical transducers that are arranged along inner circumference of inner bearing ring which rotates together with rotating shaft

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015100656B3 (en) * 2015-01-19 2016-04-21 Basbunar Hamdisana Piezoelectric generator and shaft-hub connection with such a piezoelectric generator
CN105406764A (en) * 2015-11-24 2016-03-16 南京工业职业技术学院 Rotary type piezoelectric generator apparatus
DE102017126206A1 (en) 2017-11-09 2019-05-09 Man Truck & Bus Ag Piezoelectric generator
EP3490135A1 (en) * 2017-11-09 2019-05-29 MAN Truck & Bus AG Piezoelectric generator
CN109546889A (en) * 2018-11-28 2019-03-29 厦门大学 A kind of piezoelectric type energy collection device of time-sharing multiplex

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