US20080101865A1 - Hydrodynamic Drive Train for Energy Converters that use Ocean Currents - Google Patents

Hydrodynamic Drive Train for Energy Converters that use Ocean Currents Download PDF

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Publication number
US20080101865A1
US20080101865A1 US11/720,564 US72056405A US2008101865A1 US 20080101865 A1 US20080101865 A1 US 20080101865A1 US 72056405 A US72056405 A US 72056405A US 2008101865 A1 US2008101865 A1 US 2008101865A1
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United States
Prior art keywords
generation system
energy generation
power
accordance
water turbine
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Abandoned
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US11/720,564
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English (en)
Inventor
Andreas Basteck
Martin Tilscher
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Voith Turbo GmbH and Co KG
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Voith Turbo GmbH and Co KG
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Assigned to VOITH TURBO GMBH & CO. KG reassignment VOITH TURBO GMBH & CO. KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: TILSCHER, MARTIN, BASTECK, ANDREAS
Publication of US20080101865A1 publication Critical patent/US20080101865A1/en
Abandoned legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D15/00—Transmission of mechanical power
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H47/00—Combinations of mechanical gearing with fluid clutches or fluid gearing
    • F16H47/06—Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the hydrokinetic type
    • F16H47/08—Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the hydrokinetic type the mechanical gearing being of the type with members having orbital motion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/40—Transmission of power
    • F05B2260/403—Transmission of power through the shape of the drive components
    • F05B2260/4031—Transmission of power through the shape of the drive components as in toothed gearing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/48—Control of exclusively fluid gearing hydrodynamic
    • F16H61/50—Control of exclusively fluid gearing hydrodynamic controlled by changing the flow, force, or reaction of the liquid in the working circuit, while maintaining a completely filled working circuit
    • F16H61/52—Control of exclusively fluid gearing hydrodynamic controlled by changing the flow, force, or reaction of the liquid in the working circuit, while maintaining a completely filled working circuit by altering the position of blades
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

Definitions

  • the invention relates to a device and a method for creating electrical energy from an ocean current, wherein the created electrical energy is fed in particular into an electrical network with a mainly constant network frequency.
  • Ocean currents offer great potential for obtaining electrical energy without releasing emissions during energy creation.
  • Such ocean currents are either available permanently, e.g. the Gulf Stream, or they are caused by tides. In the case of the latter, areas are particularly interesting in which the tidal range is particularly strong and in which geographical uniquenesses, such as narrow flow-through areas or particularly molded bay areas, lead to a pronounced ocean current.
  • the state of the waves can be used to drive underwater current power machines.
  • Such conditions can be created through artificial means, such as inlet pools, through which the energy inherent to the waves can be taken advantage of.
  • an electrical generator driven at least indirectly by the power intake can be designed with a fixed speed.
  • Such fixed-speed energy generation systems can easily be impressed on an electrical integrated network with the use of asynchronous generators based on the principle-determined slip.
  • the disadvantage is that the speed of the power input results in decreased energy efficiency through the placement of the paddle-wheel position for holding it constant, i.e. the power input cannot extract the maximum energy from the ocean current.
  • the object of the invention is to specify a device for the generation of electrical energy from an ocean current as well as a method for the operation the same, which overcomes the disadvantages described above.
  • this type of energy generation system should be able to be operated in the partial-load operational range with a variable speed of the power intake with a simultaneously constant speed of the electrical generator.
  • the energy generation system should also allow the realization of other operating states.
  • a speed regulation of the power intake should be possible above the speed threshold, in order to prevent the occurrence of cavitation and to protect the fish population from the damaging rotating speed.
  • surge reduction and short-term energy storage for collecting and assessing load surges and energy peaks should be possible.
  • the energy generation system in the full-load area should be able to realize torque regulation as well as special operating states such as shut down and the reaction to a load rejection.
  • the inventor first identified that a water turbine driven by an ocean current via a drive must be connected with a quick running electrical generator in order to be able to design the electrical generator to be sufficiently small with respect to the water turbine.
  • the connection between the water turbine and the electrical generator is produced by means of a drive train, which comprises a hydrodynamic drive.
  • the hydrodynamic drive serves to transmit speed, on the other hand, for the implementation of the speed variability of the water turbine with the simultaneous speed constancy of the electrical generator. This is effectuated through the regulation and control of at least one hydrodynamic component in the hydrodynamic drive, wherein it is preferred in particular that the hydrodynamic drive is designed as a power branching drive.
  • the drive train according to the invention comprises an overriding drive, such as a planetary drive, for the power branching into a first power branch and at least one second power branch.
  • a quickly rotating shaft is arranged in the first power branch to drive an electrical generator.
  • the second power branch is at least indirectly connected with the first power branch via a hydrodynamic component, for example a hydrodynamic converter, a hydrodynamic coupling or a Trilok converter.
  • the electrical generator When the water turbine is started from the stopped position, the electrical generator is first accelerated until it reaches its target speed. In the normal mode then reached, the network frequency impresses a target speed depending on the number of poles on the electrical generator and thus the first power branch.
  • a typical speed of the electrical generator is for example 1500 rpm, so that small electrical generators can be used.
  • an effective operation of a hydrodynamic component connected at least indirectly with the first power branch, which is assigned to the second power branch is possible with such high speeds on the shaft of the first power branch. Due to the power flow regulated and controlled by the hydrodynamic component between the first and the second power branch, it is now possible to drive the water turbine with a speed that is optimal for the power conversion.
  • a hydrodynamic servo converter is used as the hydrodynamic component for the creation of a connection between the first and the second power branch, it has been shown that the characteristics of the servo converter match the characteristics of the power input with respect to the speed/power and the speed/torque ratio. This can be used to realize a self-regulating effect.
  • a drive train with a servo converter can be designed such that the water turbine can be driven optimally with respect to it speed with the simultaneously constant rotating speed with a certain, mainly constant setting of the guide wheel of the servo converter.
  • no regulation in the actual sense is necessary for the setting of an optimal speed of the water turbine.
  • the speed guidance for the speed limitation of the water turbine is effectuated by means of the selected setting for the hydrodynamic component in the hydrodynamic drive. If for example a servo converter is used and if the drive train of the energy generation system according to the invention is advantageously designed in a power-branching manner, then the power transmission from the first power branch to the second power branch can be effected via a change in the setting of the guide wheel of the servo converter. In general, any guide wheel setting in which the water turbine is optimally driven is abandoned.
  • a threshold in the power intake is also assigned to the threshold speed in an optimal power intake, i.e. a power intake along the parabolica.
  • an optimal power intake i.e. a power intake along the parabolica.
  • a special advantage of the energy generation system according to the invention with a hydrodynamic drive is that for the operating state of a speed-regulated water turbine fluctuations in the power input and in particular temporally quickly changing load fluctuations can be damped and its energy input can be used for short-term acceleration of the water turbine and thus as a short-term energy storage.
  • This property originates from the fact that a certain operating point is determined through the regulated and controlled setting of the hydrodynamic component. Fluctuations in the speed of the water turbine are then possible around this operating point. For this, a fluctuations width of ⁇ 10% and preferably ⁇ 5% and even more preferably ⁇ 3% are still tolerated.
  • the full-load area In the partial load area, in which the energy generation system according to the invention is operated optimally along the parabolica and advantageously as of a certain speed threshold in a speed-limited or speed-driven manner, the full-load area was connected. This is characterized in that a maximum torque is achieved on the power input. Above this torque threshold, a torque regulation for the water turbine takes place, wherein additional servo elements, which limit the power taken in by the water turbine, are used for the energy generation system according to the invention in addition to the setting of the hydrodynamic components in the drive train.
  • a power limitation which has slow reaction times, is achieved through a change in the angle position of the paddle wheels of the water turbine, while through the setting of the hydrodynamic component in the case of a servo converter through the setting of the guide wheel, a short term power limitation is performed for the electrical generator.
  • the slow system of the angel adjustment of the paddle wheels of water turbine can thus be bridged in the short term with the more quickly adjustable servo converter.
  • a hydrodynamic coupling is used as the hydrodynamic component instead of a servo converter, then no self-regulation can be realized for the power-optimal guidance of the water turbine.
  • the setting of the hydrodynamic coupling must be actively regulated in order to guide in the partial-load area the speed of the water turbine in a power optimal manner along the parabolica.
  • the advantage of using a hydrodynamic coupling instead of a servo converter is however an increase in the power efficiency of the drive train, in particular under full-load conditions. If a Trilok converter is used as an alternative hydrodynamic component, there are also advantages in terms of efficiency in certain power areas or operating phases with respect to a hydrodynamic servo converter.
  • FIG. 1 shows an energy generation system according to the invention in a schematically simplified manner.
  • FIG. 2 shows a preferred embodiment of the drive train of the energy generation system with a first and a second power branch.
  • FIG. 3 shows three operational areas of an energy generation system according to the invention in the speed/torque diagram.
  • FIG. 4 shows the self-regulation effect when using a hydrodynamic servo converter in the drive train for the realization of a power-optimal speed guidance in the part-load area.
  • FIG. 5 represents the setting of the guide wheel of a hydrodynamic servo converter during the transition between the individual operating ranges from FIG. 3 .
  • FIG. 6 illustrates the short-term energy storage and the load-surge reduction of an energy generation system according to the invention in the speed-regulated range.
  • FIG. 7 shows in a schematically simplified manner three regulation levels for the operation of an energy generation system according to the invention.
  • FIG. 1 shows the energy generation system according to the invention in a schematically simplified manner.
  • An electrical generator 11 which is coupled with an electrical network 60 , is hereby driven at least indirectly by means of a water turbine 3 .
  • the water turbine 3 can be designed within the framework of expert ability. For example, a two-or multi-blade propeller structure can be selected. Furthermore, additional structures can be provided around the water turbine, which serve to protect or guide the current.
  • a hydrodynamic drive train 1 is used between the water turbine 3 and the electrical generator 11 .
  • a hydrodynamic drive train 1 is to be understood in the present invention as a power-branched drive train, which comprises a first power branch 7 and at least one second power branch 18 .
  • a power branching drive used for the power branching of the power fed to the hydrodynamic drive train on the drive side can be a planetary wheel set.
  • this can be a planetary wheel set.
  • a connection is established between the first and the second power branch 7 , 18 by means of a hydrodynamic component, which is assigned to the second power branch so that it is possible to impress different rotating speeds on the water turbine 3 starting from a constant rotating speed of the electrical generator 11 .
  • the energy generation system can also have optional components. These are additional drives, which are located upstream or downstream from the hydrodynamic drive train.
  • additional drives which are located upstream or downstream from the hydrodynamic drive train.
  • a transmission stage 4 designed as a planetary wheel set serves as a first transmission of the speed of the water turbine.
  • a transmission element 50 that comprises a coupling and/or a brake can be provided between the hydrodynamic drive train 1 and the electrical generator 11 . These can also be located between the additional drive 4 and the hydrodynamic drive train 1 .
  • FIG. 1 The mechanical holding structures for the energy generation system are not shown in detail in FIG. 1 .
  • An embodiment is preferred in which the components shown in FIG. 1 are combined as a structural unit and encased in a water-tight housing so that this structural unit can be entirely submersed. This structural unit can then be delivered along a support structure up to a depth preferred for the energy generation.
  • FIG. 2 shows an advantageous embodiment of the hydrodynamic drive train 1 of an energy generation system according to the invention. Its input shaft 2 is thereby at least indirectly connected with the water turbine 3 of a wind power system according to the invention.
  • a drive 4 with a constant transmission ratio is placed between the rotor 3 of the wind power machine and the input shaft 3 .
  • a planetary drive is used as the power branching drive 5 of the drive train 1 , wherein the input shaft 2 is connected with the planetary wheel carrier 6 .
  • the first power branch 7 feeds power via the sun wheel 9 of the planetary wheel drive to the output shaft 10 of the drive train.
  • This output shaft 10 drives at least indirectly the electrical generator 11 and is connected with the hydrodynamic servo converter 12 .
  • the output shaft is at least indirectly connected with the pump wheel 13 of the hydrodynamic servo converter 12 .
  • a guide wheel with adjustable blades, with which the power flow to the turbine wheel 14 can be adjusted, is used as the reaction member 15 in the hydrodynamic converter 12 .
  • a return power flow in turn takes place via the turbine wheel 14 , which is fed via a second, fixed planetary wheel set 16 , and in turn has an effect on the outer wheel 17 of the power branching drive 5 and affects the transmission ratio. This represents the second power branch 18 of the power branching drive, which serves to return power.
  • FIG. 3 Three main operational areas are differentiated for the operation of the energy generation system according to the invention. These are shown in FIG. 3 .
  • the power obtained from the water turbine is hereby represented in any units depending on the speed of the water turbine, also in any units.
  • the energy generation system is operated at partial load. This begins as of a certain speed and ends at a certain speed threshold Dmax.
  • the curve shown in FIG. 3 in operational range I represents a target curve, which shows a power-optimal speed guidance of the water turbine 3 .
  • An optimal speed of the water turbine 3 is assigned to a certain power input. If the water turbine 3 rotates with a lower or a higher speed than the optimal speed, then no optimal power of the ocean current can be obtained from the energy generation system.
  • the term speed guidance along a parabolica is also used for the power-optimal speed guidance in the operating range I.
  • an electrical generator 11 with a constant, preferably fast rotating speed is used. Synchronous generators that were once coupled with the network frequency are support in their rotating speed by the electrical integrated network 60 . This applies in a sufficient scope also to asynchronous generators, if they are operated in a rigidly running linear area. Starting from this constant speed of the electrical generator 11 , the input-side speed of the drive train and thus the speed of the water turbine 3 is guided through the control and/or regulation of the working connection between the first power branch 7 and the second power branch 18 of the drive train 1 , i.e. the power flow over the hydrodynamic components, such that it always rotates with a power-optimal speed.
  • a hydrodynamic servo converter 12 is used as the hydrodynamic component, there is the advantage that no regulation in the actual sense but rather a system-inherent self-regulating effect can be used for the power-optimal speed guidance of the water turbine 2 .
  • Curve E thereby represents the power taken in by the wind rotor; curve F is the power on the sun wheel 9 ; curve G is the power transmitted by the drive train; and curve H indicates the power flowing back from the hydrodynamic converter 12 to the power branching drive 5 via the second power branch 18 .
  • the setting of the guide wheel 15 of the hydrodynamic servo converter is also shown.
  • the operating range I in which kinetic energy is removed through the power input of the energy generation system according to the invention in a power-optimal manner under part-load conditions, could now be guided along the power parabolica up to the full-load area with a constant speed.
  • a speed threshold Dmax which is to be observed in order to avoid cavitation or to protect of fish, is normally exceeded as of a certain power input.
  • the operating range I is thus preferably abandoned and switched over to an operating range II, which is characterized by the holding constant of the speed of the water turbine.
  • the transition between the individual operating ranges is shown in FIG. 5 .
  • a mainly constant remaining guide wheel position in the present case at 25% of the adjustment travel is used in the sense of the self-regulation effect.
  • this optimal guide wheel position is abandoned and the guide wheel of the hydrodynamic servo converter 12 is readjusted depending on the power input to the water turbine 3 such that the water turbine speed remains mainly constant and only the torque taken in by the water turbine 3 and thus the power taken in vary.
  • a certain speed progression preferably a particularly steep speed progression, can be selected in one embodiment instead of an actual speed threshold. Characteristic for the operating range II is that the power-optimal speed guidance is abandoned.
  • the transition of the speed-limited operating range II on the torque-limited operating range III is shown in FIG. 5 .
  • the control and/or regulation for the effectuating a speed constancy is thereby abandoned above a threshold torque on the wind turbine 3 .
  • the power input through the water turbine 3 is limited with additional measures, for example a change in the paddle-wheel position of the water turbine 3 or an adjustment of an associated guide apparatus and another speed increase for the torque limitation is thereby prevented.
  • the guide wheel position of the hydrodynamic servo converter 12 is first changed in order to avert short-term torque surges or increases through the drive train, which causes a short-term speed increase in the water turbine. This is however limited by the paddle-wheel adjustment of the water turbine 3 taking place in the second step. This is not shown in detail in FIG. 5 .
  • FIG. 6 now shows the case of the operating range II, in which a certain target speed of the water turbine 3 is impressed through the deadjustment of the hydrodynamic servo converter 12 above a certain speed threshold range.
  • different working point can be selected through the deadjustment of the hydrodynamic servo converter 12 .
  • the speed is restricted in this manner.
  • additional operating states can also occur, for example the startup or shutdown of the energy generation system, the synchronization of the electrical generator with the network frequency, a load rejection, an emergency stop or special operating conditions, for example a test or protection mode.
  • an embodiment of the regulation and control for the energy generation system is preferred in the form of a hierarchical structure with a subdivision into three regulation levels. This is outlined in FIG. 7 .
  • the first regulation level is the energy generation system itself.
  • the drive train of the energy generation system is hereby preferably designed with a hydrodynamic servo converter as the hydrodynamic component, which leads to a self-regulation.
  • this system-inherent self-regulation must be replaced by an active regulation through speed guidance of the water turbine.
  • This first regulation level is overlaid by the second regulation level, which includes the regulator for the paddle-wheel position, the adjustment of the hydrodynamic component and a regulator for the power electronics of the generator.
  • a target vs. actual value comparison takes place for each of the named regulators, whereupon corresponding adjustment signals are output.
  • the third regulation level not every regulator of the second regulation level is activated for all operating ranges or operating states.
  • a control of the regulator activation as well as a regulator weighting or a graduated switching between individual regulators is effectuated by the third regulation level.
  • This not only selects the variables to be regulated depending on the operating state or the operating range, but it is also possible to use different regulators or different regulator settings for one and the same variable, e.g. the paddle-wheel position.
  • the regulation characteristics and the regulation speed can hereby be adjusted based on each special situation.
  • an adjustment of the regulator target values and the selected working points also results via the third regulation level as a superordinate control level.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
  • Hydraulic Turbines (AREA)
US11/720,564 2004-12-03 2005-11-30 Hydrodynamic Drive Train for Energy Converters that use Ocean Currents Abandoned US20080101865A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102004058258A DE102004058258A1 (de) 2004-12-03 2004-12-03 Vorrichtung und Verfahren zur Erzeugung elektrischer Energie aus einer Meeresströmung
DE102004058258.0 2004-12-03
PCT/EP2005/012777 WO2006058725A1 (de) 2004-12-03 2005-11-30 Hydrodynamischem anstriebstrang für meeresströmung energieumwandler

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US (1) US20080101865A1 (de)
EP (1) EP1817497A1 (de)
KR (1) KR20070085927A (de)
CN (1) CN101061313A (de)
DE (1) DE102004058258A1 (de)
WO (1) WO2006058725A1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080265579A1 (en) * 2007-04-30 2008-10-30 Voith Patent Gmbh Drive train for an immersion energy production system
US20100013230A1 (en) * 2008-07-17 2010-01-21 Dennis John Gray Flowing Water Energy Device
US20100201131A1 (en) * 2009-02-06 2010-08-12 Ignacio Peralta Systems and Methods for Converting Marine Currents into Electrical Energy
ES2395067A1 (es) * 2011-07-08 2013-02-07 Demetrio FERNÁNDEZ LÓPEZ Dispositivo multiplicador de par motor para la generación de energía eléctrica.
US10113626B2 (en) * 2013-11-14 2018-10-30 Voith Patent Gmbh Power transmission device
EP3674035A1 (de) 2018-12-07 2020-07-01 Pepperl+Fuchs AG Spannvorrichtung mit induktiver abfrageeinheit

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DE102008011261A1 (de) * 2008-02-27 2009-09-03 Emitec Gesellschaft Für Emissionstechnologie Mbh Wabenkörper mit flexiblen Verbindungsstellen
CN103307248B (zh) * 2013-06-26 2015-11-25 重庆大学 回流式液力机械自动变速传动装置
CN103644279B (zh) * 2013-12-23 2015-12-09 重庆望江工业有限公司 一种用于风力发电机组的恒速输出齿轮箱
CN105402078B (zh) * 2014-04-24 2017-08-11 南通大学 高传动效率的螺旋型永磁轴承容错结构洋流发电机

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US20070007769A1 (en) * 2003-03-31 2007-01-11 Andreas Basteck Drive train for the transmission of a variable power

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DE4321755B4 (de) * 1993-06-30 2006-07-27 Harald Von Hacht Vegetative Antriebskonzeption mit Hilfe eines stufenlosen servomechanischen Getriebes

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US20070007769A1 (en) * 2003-03-31 2007-01-11 Andreas Basteck Drive train for the transmission of a variable power

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080265579A1 (en) * 2007-04-30 2008-10-30 Voith Patent Gmbh Drive train for an immersion energy production system
US8039977B2 (en) * 2007-04-30 2011-10-18 Voith Patent Gmbh Drive train for an immersion energy production system
US20100013230A1 (en) * 2008-07-17 2010-01-21 Dennis John Gray Flowing Water Energy Device
US8007231B2 (en) 2008-07-17 2011-08-30 Dennis Gray Flowing water energy device
US20100201131A1 (en) * 2009-02-06 2010-08-12 Ignacio Peralta Systems and Methods for Converting Marine Currents into Electrical Energy
US7948108B2 (en) 2009-02-06 2011-05-24 Ignacio Peralta Systems and methods for converting marine currents into electrical energy
ES2395067A1 (es) * 2011-07-08 2013-02-07 Demetrio FERNÁNDEZ LÓPEZ Dispositivo multiplicador de par motor para la generación de energía eléctrica.
US10113626B2 (en) * 2013-11-14 2018-10-30 Voith Patent Gmbh Power transmission device
EP3674035A1 (de) 2018-12-07 2020-07-01 Pepperl+Fuchs AG Spannvorrichtung mit induktiver abfrageeinheit
DE102018009534B4 (de) 2018-12-07 2024-04-04 Pepperl+Fuchs Se Spannvorrichtung mit induktiver Abfrageeinheit

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CN101061313A (zh) 2007-10-24

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