WO2005005827A1 - Electromagnetic piston for water-pumping windmills - Google Patents

Electromagnetic piston for water-pumping windmills Download PDF

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Publication number
WO2005005827A1
WO2005005827A1 PCT/ES2004/000302 ES2004000302W WO2005005827A1 WO 2005005827 A1 WO2005005827 A1 WO 2005005827A1 ES 2004000302 W ES2004000302 W ES 2004000302W WO 2005005827 A1 WO2005005827 A1 WO 2005005827A1
Authority
WO
WIPO (PCT)
Prior art keywords
characterized
reinvindication
device according
mill
upper
Prior art date
Application number
PCT/ES2004/000302
Other languages
Spanish (es)
French (fr)
Inventor
Juan Carlos Couceyro
Original Assignee
Couceyro, Adrienne
Couceyro, Mariana
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to ESP/200301670 priority Critical
Priority to ES200301670 priority
Application filed by Couceyro, Adrienne, Couceyro, Mariana filed Critical Couceyro, Adrienne
Publication of WO2005005827A1 publication Critical patent/WO2005005827A1/en

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D9/00Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
    • F03D9/10Combinations of wind motors with apparatus storing energy
    • F03D9/11Combinations of wind motors with apparatus storing energy storing electrical energy
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D9/00Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
    • F03D9/20Wind motors characterised by the driven apparatus
    • F03D9/25Wind motors characterised by the driven apparatus the apparatus being an electrical generator
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D9/00Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
    • F03D9/20Wind motors characterised by the driven apparatus
    • F03D9/28Wind motors characterised by the driven apparatus the apparatus being a pump or a compressor
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K35/00Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit
    • H02K35/02Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit with moving magnets and stationary coil systems
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K7/00Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/18Structural association of electric generators with mechanical driving motors, e.g. turbine
    • H02K7/1892Generators with parts oscillating or vibrating about an axis
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/72Wind turbines with rotation axis in wind direction
    • Y02E10/725Generator or configuration
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00Climate change mitigation technologies for sector-wide applications
    • Y02P80/10Efficient use of energy
    • Y02P80/156Efficient use of energy in fluid distribution systems
    • Y02P80/158Solar or wind-powered water pumping not specially adapted for irrigation

Abstract

The invention relates to a device which is used to store electrical power in batteries. The inventive device is associated with a rural windmill and operates without interrupting the water-pumping function thereof. The device comprises: a magnetic piston (1) having one end which is connected to the rod of the pumping element of the windmill and one end which is connected to the machine output of the mill; and a stator (2) which is fixed to the tower of the mill using fixing means (6, 7), the magnetic piston (1) moving axially and alternately inside said stator. The invention also relates to the rural windmill which comprises the aforementioned device in order to generate electricity and to the use of the electricity generated thereby.

Description

 . ELECTROMAGNETIC PACKING FOR WIND MILLS WATER PUMPS

The present invention is related to a. device for accumulating electrical energy in batteries associated with a rural windmill, without interrupting its function of pumping water, with a rural mill that comprises it and with the use of the electrical energy generated by said device. More particularly, it is a piston that is fitted - directly at the exit of the Mill machine, and that slides with alternative movement inside a stator attached to the tower of said Mill. This electricity-generating function is fulfilled at the same time that the Mill pumps water with a cadence proportional to the wind, accumulating it in a tank, commonly called the Australian tank. The windmills generating electricity of art, are high-performance and high-speed machines, which must be perfectly adapted to electric generators, which in turn require a high rotation speed for proper operation. For this reason, the rotor of these devices has blade seals, which are generally thin, and is directly coupled to a generator that is calculated to obtain a maximum performance set at normal wind speeds. In addition they do not need a large torque for starting, because the generator has a minimum floor that allows a packing until it starts to generate electricity. The rural mill, however, needs a lot of torque to lift a large column of water and is also slow moving, since it drives an aspirating / impelling machine. For this reason it has many widened blades at the ends to be able to rotate between 5 and 4Q revolutions per minute (RPM), an incompatible value for standard generators. A mechanical multiplier 20 to 1 or a generator calculated at such a low rotation frequency would be very heavy and uneconomic. In addition there would be no place in the turret of the Mill to place a device of such magnitude, or mention the fact that it would be a very unreliable and difficult to maintain set. Since standard rotary generators are unsuitable for coupling to a rural water extraction mill, we have developed the present invention. Through a simple coupling and avoiding gears, oil, mechanical drives, collectors, coals, etc., we have taken the axial oscillatory movement of the Mill, configuring an extremely reliable assembly. The device of the invention comprises, in general terms, a magnetic plunger that is coupled to the output of the Mill. On the other hand, a stator ae fixed to the tower of said

SUBSTITUTE SHEET (RULE 26) up / down transmitted by the pump rod. Said stator has at least one iron toroid formed, with an inner housing for at least one field coil. Said coil preferably has a copper winding with a certain number of turns. Said plunger is made up of magnets, which can be rare earth (Nd, Fe, B), ceramics or any other ferromagnetic material, in order to create NSN magnetic fields whose field lines are closed in the stator inside which the collecting coils

During the axial movement of said plunger, an electric voltage is induced in said at least one coil, and in this way the Mill pumps electricity that accumulates in batteries, preferably located at the base thereof, in the same way that it pumps water to accumulate it in the tank

It is then an object of the present invention, a device for accumulating electrical energy in batteries associated with a rural windmill, without interrupting its function of pumping water, wherein said device comprises a magnetic piston linked by one of its ends to the rod of the pump of said Mill and at the other end of it at the machine outlet of said Mill, and a stator fixed to the tower of said Mill by means of fixing means, through which said magnetic piston moves axially and alternatively. Still another object is the rural windmill that includes the device of the invention. In order to achieve a better understanding of the invention, the various figures that illustrate it are detailed below.

Figure 1 is a section of a first embodiment of the device of the invention. Figure 2 is a section of a second embodiment of the device of the invention.

Figure 3 is a schematic of the alternative displacement of the plunger inside the stator, in the case of a single field.

Figure 1 shows a first preferred embodiment example that includes a magnetic plunger 1, consisting of a bearing core consisting of a tube of diamagnetic material, into which a plurality of permanent magnets 1C and polar pieces are threaded. of magnetic material ID, in a sequence such that they generate a magnetic field of determined polarity and intensity. Permanent magnets can be constructed from ceramic elements, rare earth (Nd, Fe, B), or any type of magnetizable material that meets the desired specifications. A stator 2 is fixed to the Mill tower, through which said piston moves magnetic 1. Said stator is, preferably and by way of example, a toroidal bell of magnetic material, with an inner housing for a coil 3 composed of n turns, preferably of copper wire of a given diameter.

The values of the number of turns n and the diameter of the copper wire are values that depend on the nominal voltage of the machine, and its determination is within the reach of the mid-level technician, according to the desired electrical energy requirements.

One of the ends of said magnetic plunger 1, more specifically the upper one, is coupled by means of an upper coupling 4 to the machine outlet of the Mill (not illustrated), and the other end of said plunger 1, more specifically the lower, is coupled by means of a lower coupling 5 to the rod of the Mill pump (not shown). Said stator 2 is fixed to the tower of said mill by fastening means such as, for example, upper and lower mounting rings 7 that include tensioners 8. For better fit, the magnetic piston 1 reproduces the axial oscillatory movement, which comes from the crank-crank assembly of the gearbox or mill machine (not illustrated). Said movement is sinusoidal in nature, with a stroke (c) between 0.18 to 0.20 meters and a velocity V of approximately 0.2 m / sec. When said piston moves with respect to stator 2, a variation of magnetic flux is generated and when varying the concatenation of field lines that cross said coil 3 thus generates an electromotive force. Said electromotive force is an electrical voltage also of a sinusoidal nature, which is subsequently rectified in a diode bridge to be accumulated in batteries, located at the base of the mill tower (not illustrated). The maximum energy transfer will occur at maximum speed, that is, when coil 3 concatenates the greatest amount of magnetic field lines per second. A second preferred embodiment is illustrated in Figure 2. There, the plunger 1 is formed by a plurality of magnets IC and by polar pieces of magnetic material ID in a given sequence. Said piston 1 also reproduces an oscillatory axial movement, which comes from the crank-crank assembly of the gearbox or mill machine (not illustrated). However, for the present embodiment, the stator 2 is multipolar, that is to say it has a plurality of internal housings for coils 3, preferably of the toroidal type and vertically coupled. In this way a better use of axial movement is achieved to accumulate a greater amount of electrical energy. In addition, if permanent magnets 1C constructed from rare earths are used, such as Nd, Fe, B, also called superimanes, they allow reducing the amount of copper wire turns n that They make up each coil 3, reducing the volume and weight of the device, while optimizing the obtaining of electrical energy.

Another variant with respect to the device of figure 1, is formed by linking the ends of the magnetic plunger 1 to the mill. The upper and lower couplings 5 described in FIG. 1, comprise, for the present embodiment, respectively, upper and lower mechanical transmission supports 9.9 ', associated respectively and by one of their faces to the mill machine outlet and the rod of the pump, and on the other of its faces to upper and lower elastic elements 10,10 ', which are associated respectively to each of the ends of said piston 1.

Preferably said upper and lower elastic elements 10,10 'are springs. Said 10,10 'springs have their ends supported on upper and lower 14,14' carrier elements. These 9.9'transmission supports can include 15.15 'upper and lower reinforcing tubes inside. The rod of the pump is coupled to said lower mechanical transmission support 9 'by a lower coupling 12'; and the drive shaft of the Mill machine, is coupled to said upper mechanical transmission support 9, by means of an upper coupling 12. The transmission bars 11 link said mechanical transmission supports 9.9 'to each other. Said transmission bars 11 pass through a cage J formed by a set of upper and lower guide covers 18,18 'and lateral compression shafts 13 that link said guide covers 18,18' to each other. Inside said cage J, a stator 2 is observed. Said transmission bars 11 and said plunger 1 pass through said upper guide cover 18 through anti-friction bushings 16 and 17; and said lower guide cover 18 'through lower anti-friction bushings 16 and 17'. Finally, the device includes 6.7 fixing bars that fix said cage to the Mill tower (not illustrated). Said fixing bars 6.7 also include S tensioners for a better fit.

Stator 2 preferably has a weather-resistant surface coating, in particular resistant to water action, based on suitable varnishes such as epoiά. The coils 3 are also subjected to a treatment similar to that of the stator 2, which makes them weatherproof to prevent moisture condensation. The other parts are preferably stainless steel, and the moving parts are self-lubricated, thus generating a set suitable for the weather. The use of permanent magnets 1 C of rare earths (Nd, Fe, B) of very high coercive force, superior to 10,000 Oersted, generates a strong attraction between the plunger 1 and the stator 2, which initially causes said plunger 1 to be immobilized. When the upper 9 and lower 9 premium mechanical supports move axially due to the action of the pump rod, the elastic elements or lower 10 and upper 10 premium springs are compressed and stretched respectively, accumulating potential displacement energy, which is released when the force of the pump rod exceeds said coercive force. At that moment, the magnetic piston 1 initiates an accelerated movement which, due to its low mass, is of an average speed much higher than the speed of the pump rod, which continues to be independent with its axial oscillatory movement. This constitutes a very important speed multiplier in voltage induction.

In its displacement within said stator 2, the piston 1 transforms its mechanical energy into electrical energy, and for this reason it lowers its speed until it stops at the next coil 3, but with opposite polarity, generating an energy pulse. The distance between two poles is called the polar pass "p". Since a polar pass "p" is approximately one tenth of the Mill's run, there are 10 energy pulses for the rise and another 10 energy pulses for the descent. In this way all the energy of the wheel is used, the machine is designed to take approximately 25% of the energy in electrical production and the rest for the extraction of water, apart from the losses of the system. Figure 3 illustrates a scheme of the movement of the magnetic plunger 1. The movement in question is applicable both to a stator that includes a coil 3, as in the case of Figure 1; as for the one that includes multiple coils 3, as in the case of Figure 2. In order to illustrate the movement of the magnetic plunger 1, the cutting of a stator 2 with toroidal housings T is shown, of which only one of them includes a coil (B) 3.

The beginning of the movement begins when the upper 9 and lower 9 'mechanical transmission supports move upwards due to the action of the pump rod. Said rod moves upwardly a polar passage "p" exerting a force Fm. The upper spring 10 is stretched to a value Fm 2, equal to the value that the lower spring 10 'is compressed. A moment later, when the force of the pump rod exceeds the coercive force Fe of the permanent magnets 1C present in said plunger 1, the latter starts its stroke. Said piston 1, when it reaches the middle of its path, passes through a neutral magnetic axis E, with a minimum flow. Immediately afterwards he begins to be attracted to the next field. At 75% of his career, the attraction of the next field is Fc / 2. Once the piston 1 traveled a polar path "p", the direction of flow with respect to the beginning of movement, changing polarity. In this way, the next polar step "p" reverses the process described above and so on. In this way the speed of variation of the magnetic field flux in the coils 3 will depend on the springs constant 10,10 ', which should be equal, and not on the speed of the pumping rod, which governs the frequency of swing, that is the charge energy. In this way, the device has a very low floor, and always generates electricity even at low wind speeds. Consequently we are in the presence of a damped electromagnetic circuit, whose usable energy will be given by a train of pulses in which each of them has a Fe xp value that is finally

10 will transform into electricity. The energy value of each pulse is constant, since it comes from the same 10,10 'springs with equal elongations and compressions. The device of the invention, as mentioned above is intended to be coupled to a rural windmill, and more specifically it can be electrically connected in parallel to a photovoltaic device mounted on the tower of said

15 Mill, to optimize the accumulation of electrical energy which is accumulated in batteries through a diode rectifier bridge. Said accumulated energy is used to power desalination devices of the water extracted by said Mill, to supply electricians for rural wiring, lighting or for any other low-consumption electrical device.

twenty

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30

35

Claims

Claims
1. A device for accumulating electrical energy in batteries associated with a rural windmill, without interrupting its function of pumping water, characterized in that said device comprises a magnetic plunger (1) linked by one of its ends to the rod of the pump of said Mill, and at the other end of it at the machine outlet of said Mill, and a stator (2) fixed to the tower of said mill by means of fixing means (6, 7) through which it travels axially and alternately , said magnetic plunger (1).
2. Device according to Reinvindication 1, characterized in that said plunger (1) comprises a bearing core constituted by a tube of diamagnetic material, into which a plurality of permanent magnets (1C) and polar pieces of magnetic material (ID) are threaded, in a sequence such that they generate a magnetic field of determined polarity and intensity.
3. Device according to Reinvindication 1, characterized in that said permanent magnets (1C) are constructed from ceramics, rare earths (Nd, Fe, B), or any other type of magnetizable material that meets the desired specifications.
4. Device according to Reinvindication 1, characterized in that said stator (2) is preferably a toroidal bell of magnetic material, with at least one inner housing for at least one coil (3), said stator (2) preferably has a coating surface resistant to weathering, in particular, resistant to the action of water, based on suitable varnishes such as epoxy type.
5. Device according to Reinvindication 4, characterized in that said at least one coil (3) is composed of n turns, preferably of copper wire of determined diameter and subjected to a treatment similar to that of the stator (2) that makes them resistant to weathering to prevent moisture condensation.
6. Device according to Reinvindication 5, characterized in that the number of turns n and the diameter of the copper wire are values that depend on the nominal attention of the machine.
7. Device according to Reinvindication 1, characterized in that the moving parts thereof are self-lubricated.
8. Device according to Reinvindication 1, characterized in that the linking of said one of the ends of the magnetic plunger (1) to the machine outlet of the Mill is carried out by means of an upper coupling (4), and the linking of said other end of the piston (1) to the pump rod of the Mill, is carried out by means of a lower coupling (5).
9. Device according to Reinvindication 8, characterized in that said upper coupling (4) with said machine output of the Mill, and said lower coupling (5) with said rod of the pump, are direct couplings.
10. Device according to Reinvindication 8, characterized in that said upper (4) and lower (5) couplings respectively comprise upper and lower mechanical transmission supports (9.9 '), associated respectively and by one of their faces at the output of Mill machine and the rod of the pump, and on the other of its faces to upper and lower elastic elements (10,10 '), which are associated respectively to each of the ends of said plunger (1).
11. Device according to Reinvindication 10, characterized in that said upper and lower elastic elements (10,10 ') are springs.
12. Device according to Reinvindication 11, characterized in that said upper and lower springs (10,10 ') have their ends supported by upper and lower carrier elements (14,14').
13. Device according to Reinvindication 10, characterized in that said upper and lower mechanical transmission supports (9.9 ') can include upper and lower reinforcement tubes (15.15') inside.
14. Device according to Reinvindication 10, characterized in that the pump rod is coupled to one of the faces of said lower mechanical transmission support (9 ') by means of a lower coupling (12) and the drive shaft of the Mill machine is coupled to one of the faces of said upper support (9), by means of an upper coupling (12).
15. Device according to Reinvindication 10, characterized in that the transmission bars (11) link said mechanical transmission supports (9.9 ') with each other.
16. Device according to Reinvindication 15, characterized in that said transmission bars (11) pass through a cage (J) formed by a set of lower upper guide covers (18,18 ') and lateral compression shafts (13) that link to said guide covers (18.18 ') with each other.
17. Device according to Reinvindication 16, characterized in that said stator (2) is located inside said cage (J).
18. Device according to Reinvindication 15 and 16, characterized in that said transmission bars (11) and said piston (1) pass respectively, said covers- upper lower guides (18,180 through upper and lower anti-friction bushings (16,17;, YT).
19. Device according to Reinvindication 1, characterized in that the linking of the ends of said piston (1) to the machine's output from the Mill and to the pump rod of the Mill is carried out by hydraulic means.
20. Device according to Reinvindication 1, characterized in that said piston (1) reprouce an axial oscillatory movement that comes from the crank arm assembly of said mill.
21. Device according to Reinvindication 1, characterized in that said fixing means (6,7) comprise upper and lower mounting rings, and include, for a better fit, tensioners (8).
22. Rural windmill characterized in that it comprises the device of any of the Reinvindications 1 to 21.
23. Rural windmill according to Reinvindications 22, characterized in that said device is electrically connected in parallel to a photovoltaic device mounted on the tower of said Mill, to optimize the accumulation of electrical energy.
24. Use of the electrical energy generated in the Reinvindications Mill 23 and 24 characterized in that it is accumulated in batteries through a bridge of rectifying diodes.
25. Use of the electric energy according to Reinvindication 24, characterized in that said accumulated energy is used to feed desalination devices of the water that said Mill extracts.
26. Use of electrical energy according to Reinvindication 24, characterized in that said accumulated energy is used to power eletromers of rural fences.
27. Use of electrical energy according to Reinvindication 24-, characterized in that said accumulated energy is used in lighting or to power any low-consumption electrical device.
PCT/ES2004/000302 2003-07-07 2004-06-28 Electromagnetic piston for water-pumping windmills WO2005005827A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ESP/200301670 2003-07-07
ES200301670 2003-07-07

Publications (1)

Publication Number Publication Date
WO2005005827A1 true WO2005005827A1 (en) 2005-01-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ES2004/000302 WO2005005827A1 (en) 2003-07-07 2004-06-28 Electromagnetic piston for water-pumping windmills

Country Status (1)

Country Link
WO (1) WO2005005827A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106300872A (en) * 2016-09-12 2017-01-04 华南理工大学 A kind of shaft tower resonance energy taking device

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1271490A (en) * 1969-12-06 1972-04-19 Dornier System Gmbh Improved electric power generator for a floatable body
US3696251A (en) * 1969-06-30 1972-10-03 Univ North Wales Method of generating electricity and electrical generator
ES8103516A1 (en) * 1980-02-26 1981-02-16 Pinel Jimenez Marcos Systems for the generation of electric energy, magnetic flux variation cion
ES8802633A1 (en) * 1986-02-27 1987-07-01 Prat Jove Felipe Power generator unit of linear displacement
US5366342A (en) * 1992-08-13 1994-11-22 Softwind Limited Partnership Water pumping push-pull windmill
ES2073971A1 (en) * 1991-11-15 1995-08-16 Sorelec Driving mechanism reciprocating pump.
EP0909008A2 (en) * 1997-09-16 1999-04-14 Halliburton Energy Services, Inc. Downhole current generator

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3696251A (en) * 1969-06-30 1972-10-03 Univ North Wales Method of generating electricity and electrical generator
GB1271490A (en) * 1969-12-06 1972-04-19 Dornier System Gmbh Improved electric power generator for a floatable body
ES8103516A1 (en) * 1980-02-26 1981-02-16 Pinel Jimenez Marcos Systems for the generation of electric energy, magnetic flux variation cion
ES8802633A1 (en) * 1986-02-27 1987-07-01 Prat Jove Felipe Power generator unit of linear displacement
ES2073971A1 (en) * 1991-11-15 1995-08-16 Sorelec Driving mechanism reciprocating pump.
US5366342A (en) * 1992-08-13 1994-11-22 Softwind Limited Partnership Water pumping push-pull windmill
EP0909008A2 (en) * 1997-09-16 1999-04-14 Halliburton Energy Services, Inc. Downhole current generator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106300872A (en) * 2016-09-12 2017-01-04 华南理工大学 A kind of shaft tower resonance energy taking device

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