1297results about "Fixed transformers" patented technology

A method and system are disclosed for providing electrical power from a utility electric grid to a fracturing operation, and an electrically powered fracturing system. A mobile substation includes at least two transformer units that are operatively coupled to the utility electric grid in a parallel orientation, wherein the transformer units are capable of accessing power from the utility electric grid and stepping down the power for delivery to a switchgear. An electric motor is operatively coupled to a hydraulic fracturing pump and operatively controlled by a variable frequency drive. At least one open air relay cable is operatively coupled between the switchgear and the electric motor and capable of delivering power to the electric motor.

A method and system are disclosed for providing electrical power from a utility electric grid to a fracturing operation, and an electrically powered fracturing system. A mobile substation includes at least two transformer units that are operatively coupled to the utility electric grid in a parallel orientation, wherein the transformer units are capable of receiving power from the utility electric grid and stepping down the power for delivery to a switchgear. An electric motor is operatively coupled to a hydraulic fracturing pump and operatively controlled by a variable frequency drive. At least one open air relay cable is operatively coupled between the switchgear and the electric motor and capable of delivering power to the electric motor.

A method for obtaining an improved transformer design for a power plant, including the steps of defining one or more critical temperatures (θhwnormal, θhwcontingency, θh, θo) in the operation of the transformer, determining a limit (θhw,maxnormal, θhw,max contingency, θh,max, θo,max) for at least one of the critical temperatures and obtaining an adjusted design of the transformer by using a data set of transformer loading, the data set comprising the amount of time (H) at a specific load level (κ) for a specific ambient temperature (θa). The method further includes the step of producing a transformer having the adjusted values of the design parameters (Δθhr, Δθor, R, x, y) and / or using a transformer having the adjusted values of the design parameters (Δθhr, Δθor, R, x, y) in the power plant.

The invention relates to the technical field of transformers, and discloses a cottonseed-based natural ester insulating oil transformer which comprises a three-dimensional roll iron core, a coil assembly, cottonseed-based natural ester insulating oil and an oil tank, the three-dimensional roll iron core and the coil assembly are arranged in the oil tank, and the oil tank is filled with the cottonseed-based natural ester insulating oil; the pressure of the cottonseed-based natural ester insulating oil is received through the blocking block, the movable shaft abuts against the buffer spring, and therefore the height of the blocking block is adjusted, the backflow speed of the cottonseed-based natural ester insulating oil is made to be matched with the pressure of the cottonseed-based natural ester insulating oil, and the stability of the internal pressure of the oil tank is effectively guaranteed; the inner pressure of the outer sleeve rod is changed, the effect of monitoring the inner pressure of the oil tank is achieved by monitoring the air pressure of the outer sleeve rod, the overall safety of the device is effectively guaranteed, the pressure relief effect can be achieved by increasing the backflow speed of the cottonseed-based natural ester insulating oil when high pressure is achieved, and the safety of the device is further guaranteed.

One embodiment relates to a toroidal core assembly. The annular belt magnetic core is formed by winding a ferromagnetic belt, and the magnetic conduction piece is arranged on the annular belt magnetic core. A magnetic conductor is disposed laterally on the endless belt core such that it (mechanically) is in contact with the narrow sides of the plurality of tape layers of the endless belt core.

The application provides an oil-immersed transformer, which comprises an oil tank body, a transformer body and a heat dissipation device, the oil tank body is made of aluminum alloy material and comprises an oil tank cover plate, an oil tank shell wall, an oil tank bottom plate and two oil tank fixing seats, the transformer body is arranged inside a space surrounded by the oil tank body, the transformer body comprises a planar winding core, a high-voltage coil, a low-voltage coil, an upper clamp and a lower clamp, the upper clamp and the lower clamp are made of aluminum alloy material, the heat dissipation device is fixed to the outer wall of the oil tank shell wall, and the heat dissipation device has the advantages of small density, light weight, strong heat dissipation capacity, non-magnetic conductivity and high mechanical strength, so that the volume of the transformer is reduced, the weight of the transformer is reduced, the heat dissipation effect is good, and the operation state is stable; and the planar winding core structure is adopted, so that the no-load loss and the no-load current are low, the structure is compact and reasonable, and the operation reliability of the product is improved.

The invention discloses a boost-buck and power flow control integrated transformer system. The transformer system comprises a transformer main body which receives the voltage of a three-phase power supply device and performs step-up or step-down processing on the voltage; and the phase angle adjusting device is magnetically connected with the transformer main body and is electrically isolated from the transformer main body, the phase angle adjusting device is used for adjusting the phase angle of the voltage subjected to the step-up or step-down processing of the transformer main body and outputting the voltage subjected to the phase angle adjustment to a power transmission line. By combining the power flow control function with the transformer, the occupied area of the whole set of equipment can be reduced, the number of control loops and the number of equipment can be reduced, the investment cost can be reduced, the anti-short-circuit capability of the transformer can be improved, the structural complexity can be reduced, and the voltage to ground of a tap switch can be reduced.

The utility model discloses a three-phase five-column transformer and a circuit device. The three-phase five-column transformer comprises a first magnetic core structure and a second magnetic core structure, wherein the first magnetic core structure and the second magnetic core structure are the same in structure; wherein each magnetic core structure comprises a magnet yoke, two side columns and three middle columns which are integrally formed; the distance between each side column and the nearest middle column is half of the distance between the two adjacent middle columns; the first winding coils are respectively arranged on three middle columns of the first magnetic core; the three first winding coils are electrically connected in a triangular manner; the second winding coils are respectively arranged on three middle columns of the second magnetic core; and the three second winding coils are electrically connected in a triangular manner. The transformer is more compact in structure, the utilization rate of the magnetic core is increased to a certain extent, miniaturization development of the transformer is facilitated, and the stability of the magnetic core structure in the transformer is improved.

This inductor comprises a magnetic body, a first conductor, and a second conductor. The magnetic body has a bottom surface, a top surface, and side surfaces. The first conductor has a first internal conductor that is provided inside the magnetic body, and a first external conductor that is provided outside the magnetic body. The second conductor has a second internal conductor that is provided inside the magnetic body, and a second external conductor that is provided outside the magnetic body. The first outer conductor has a first lead-out portion that is connected to the first inner conductor on a side surface of the magnetic body and extends toward the bottom surface side, and the second outer conductor has a second lead-out portion that is connected to the second inner conductor on a side surface of the magnetic body and extends toward the bottom surface side. At least a portion of the first lead-out portion and the second lead-out portion overlap each other when viewed from a direction perpendicular to the side surfaces of the magnetic body.

The invention relates to an electromagnetic transient model construction method based on a phase-shifting transformer and a current prediction method and system, and belongs to the field of transformers. According to winding coupling, interphase coupling and a magnetic circuit structure of an exciting transformer in the phase-shifting transformer, an exciting transformer electromagnetic transient model is constructed; constructing an electromagnetic transient model of the series transformer according to winding coupling, interphase coupling and a magnetic circuit structure of the series transformer in the phase-shifting transformer; according to the electrical connection relation between the iron core in the exciting transformer and the iron core in the series transformer, the electromagnetic transient model of the exciting transformer is connected with the electromagnetic transient model of the series transformer, the electromagnetic transient model of the phase-shifting transformer is generated, and compared with a steady-state model, the influence of interphase and winding coupling is considered in the model construction process, so that the model construction efficiency is improved. And a magnetic circuit structure and an iron core structure are considered, so that higher accuracy of the model in an electromagnetic transient process is achieved.

A resin film (100) comprising a core layer (2) and adhesive resin layers (1) which are respectively provided to both sides of the core layer (2), wherein: the adhesive resin layers (1) each comprise an adhesive resin composition that contains an epoxy resin; the dielectric breakdown strength of a cured product of the adhesive resin composition is not less than 300 kV / mm; the core layer (2) comprises a polyimide film; and the dielectric breakdown strength of the polyimide film is not less than 300 kV / mm.

The present invention relates to a submodule for a semiconductor transformer in single packaging with reduced partial discharge quantity and excellent insulation performance that is capable of applying an equipotential structure for each stage of the submodule for the semiconductor transformer to further improve insulation performance by reducing partial discharge quantity in the semiconductor transformer while improving insulation performance by securing separation distance between a high voltage unit and a low voltage unit in the semiconductor transformer. The submodule for semiconductor transformer in single packaging with reduced partial discharge quantity and excellent insulation performance in the present invention comprises: a high voltage unit for converting high-voltage low-frequency AC power into high-frequency AC power; a transforming unit for converting the high-voltage AC power into low-voltage AC power; and a low voltage unit for converting the low-voltage AC power into low-voltage DC power.

An insulating chip includes: a first unit; and a second unit disposed on the first unit, wherein the first unit includes a first element insulation layer including a first element back surface and a first element head surface, a first insulation element embedded in the first element insulation layer, and a first connection electrode exposed from the first element back surface, the second unit includes a second element insulation layer including a second element back surface and a second element head surface, a second insulation element opposed to the first insulation element, and a second connection electrode exposed from the second element back surface, the first unit and the second unit are disposed so that the first element back surface is in contact with the second element back surface and the first connection electrode is electrically connected to the second connection electrode.

A method and system are disclosed for providing electrical power from a utility electric grid to a fracturing operation, and an electrically powered fracturing system. A mobile substation includes at least two transformer units that are operatively coupled to the utility electric grid in a parallel orientation, wherein the transformer units are capable of accessing power from the utility electric grid and stepping down the power for delivery to a switchgear. An electric motor is operatively coupled to a hydraulic fracturing pump and operatively controlled by a variable frequency drive. At least one open air relay cable is operatively coupled between the switchgear and the electric motor and capable of delivering power to the electric motor.

Provided is a transformer exciting inrush current suppression equipment assembly that realizes the cleaning ability of the mesh ventilation opening by utilizing natural wind power, ensures the cleaning functions of smog and windblown sand, and realizes the fall of attached dust. 【Solution means】 The transformer exciting inrush current suppression equipment assembly includes a transformer 1, a mesh ventilation opening 2 is fixedly attached to the side wall of the transformer, a stopper chute 3 is provided on the inner wall of the transformer, a slide lever 4 is slidably connected inside the stopper chute, a rotating piece 5 with dust is rotatably attached to the side wall of the slide lever, an interlocking block is fixedly attached to the side wall of the slide lever, a fixed plate 7 is attached to the side wall of the transformer, and an interlocking spring is fixedly attached between the fixed plate and the interlocking block. The present invention utilizes the interaction between the slide lever, the rotating piece with dust, the fixed plate, the interlocking spring and the pneumatic assembly, and between the dust collection tank and the rotating piece with dust.

The invention relates to the technical field of transformers, and discloses a three-phase self-coupling power transformer which comprises a three-phase self-coupling transformer, three sets of transformer shells are arranged in the middle of the three-phase self-coupling transformer, and six sets of fixing frames are fixedly arranged at the positions, close to the front end and the rear end, of the upper side and the lower side of the three-phase self-coupling transformer. Driving assemblies are arranged on the front sides, the upper sides and the lower sides of the three sets of transformer shells, three sets of cooling assemblies are arranged on the inner sides, close to the outer sides of the three sets of transformer shells, of the driving assemblies, and the driving assemblies comprise three sets of upper cooling liquid shells which are arranged on the upper sides of the three sets of transformer shells and correspond to the lower ends of the four sets of fixing frames correspondingly. According to the three-phase self-coupling power transformer, through overall cooperative use, the purpose of driving the cooling assembly is achieved, changing work of different cooling effects is completed, and meanwhile the situation that the cooling assembly is wrapped on the outer side of the transformer shell all the time, and normal natural heat dissipation is affected is avoided.

The invention provides a three-phase coil holder structure of an internal coil of a transformer, and belongs to the technical field of internal coil components of the transformer, the three-phase coil holder structure comprises a coil rack arranged in an inner cavity of the transformer, coil clamping columns are uniformly arranged on the coil rack, closed end caps are arranged at the tops of the coil clamping columns, and the closed end caps are fixedly mounted at the bottom of a top frame; square clamping blocks and arc-shaped clamping blocks are sequentially and longitudinally embedded into inner cavities of the hidden groove sets in a staggered mode, three downhill extrusion bases or three uphill extrusion bases are selected to move according to the specification of a three-phase coil winding iron core, and when the coil frame is installed, the coil frame is moved towards the interior of the transformer, so that the three-phase coil winding iron core is installed. After the reverse arc-shaped plates on the two sides of the ohm-type elastic pre-connecting seat slide into the pre-connecting clamping seat, the reverse arc-shaped plates on the two sides of the ohm-type elastic pre-connecting seat are clamped through the sliding limiting clamping assembly, and the coil rack is pre-assembled, so that the stability of installing the coil rack in the transformer subsequently is ensured; therefore, convenience is brought to the installation process of related personnel.

A three phase transformer apparatus for a three phase electrical power transformation system is provided. For each phase of the three phase transformer apparatus the three phase transformer apparatus comprises: an upper core limb having a first end and a second end, a lower core limb having a third end and a fourth end, a first coil assembly comprising a first primary coil and a first secondary coil, and a second coil assembly comprising a second secondary coil and a control coil. The first primary coil and the first secondary coil of each first coil assembly are wound concentrically around the upper core limb or the lower core limb of the respective phase. The second secondary coil and the control coil of each second coil assembly are wound concentrically around the other of the upper core limb and the lower core limb of the respective phase. The second secondary coil of each second coil assembly is connected in series to the first secondary coil of the first coil assembly of the respective phase. The three phase transformer apparatus further comprises a first yoke portion connected between each of the first ends of the upper core limbs, a second yoke portion connected between each of the fourth ends of the lower core limbs, and at least one transfer yoke portion, configured to allow magnetic flux to flow between the first end of each upper core limb and the second end of the respective upper core limb, and to allow magnetic flux to flow between the third end of each lower core limb and the fourth end of the respective lower core limb. A controller is connected to the control coil of each phase and configured to apply a voltage or current waveform to the control coil in order to influence the transfer of energy between the first primary coils and the first and second secondary coils of the three phase transformer apparatus.

The objective of the present invention is to achieve downsizing of a power-receiving coil unit including a power-receiving coil.　A power-receiving coil unit (60) comprises: a first power-receiving coil (34a); a ferromagnetic first core member (65) having a first base part (65b) and a core part (65a) that protrudes to one side of the first base part and passes through the first power-receiving coil; a substrate (66) disposed on the other side of the first base part; and a transformer in which a primary-side coil is configured by wiring formed on the substrate. The first core member constitutes a part of the transformer core.

A power converter includes an autotransformer, first switches, and second switches. The autotransformer includes multiple windings. The first switches are coupled between an input node and an output node of the power converter. The second switches are coupled between a reference potential and the output node. Yet further, the first switches are operable to control switching of circuit paths including the multiple windings of the autotransformer. The second switches are operable to convey currents from the multiple windings of the autotransformer through the second switches to the output node.

The high-impedance autotransformer comprises an iron core, a series winding, a common winding I and a common winding II, the common winding I and the common winding II are distributed in the axial direction of the iron core and located on different sections of the iron core, and the series winding, the common winding I and the common winding II are sequentially connected to the iron core in a sleeved mode. The coil supporting block is arranged between the windings and is fastened with the iron core; the supporting cushion blocks are arranged on winding end faces at the two ends of the transformer, and the coil supporting blocks and the supporting cushion blocks are made of insulating materials. The self-coupling transformer solves the technical problems that the self-coupling transformer in the prior art is low in short-circuit impedance and easy to damage during short-circuit impact.

The invention comprises a method and apparatus for processing power, comprising the steps of: generating / using 3-phase power; feeding an AC drive with the 3-phase power, the AC drive generating a first output; and transforming the first output with a zigzag transformer, the zigzag transformer linked to at least one load output / load connector. The method and apparatus comprises an optional filter for filtering the 3-phase power prior to the step of transforming, the filter including a distributed gap core material.

An integrated transformer includes: two magnetic cores, wherein each magnetic core includes two magnetic yokes arranged opposite to each other along a first direction and two magnetic columns located between the two magnetic yokes, the two magnetic columns are arranged opposite to each other along a second direction; two short-circuited magnetic blocks, wherein one magnetic yoke in one of the magnetic cores is connected to one magnetic yoke in the other magnetic core through one of the short-circuited magnetic blocks to connect the two magnetic cores in series into a ring; four first windings, wound on four magnetic columns of the two magnetic cores, respectively; and a second winding, wound on the magnetic core or the short-circuited magnetic block, wherein magnetic flux directions generated by the second winding in two magnetic columns of any one of the magnetic cores are the same.

A power converter assembly may include multiple electrically conductive paths such as a first electrically conductive path, a second electrically conductive path, and a third electrically conductive path. The first electrically conductive path extends through first magnetically permeable material; the second electrically conductive path extending through second magnetically permeable material. The third electrically conductive path extends through both the first magnetically permeable material and the second magnetically permeable material. For example, the first electrically conductive path may be disposed alongside and in parallel with a first portion of the third electrically conductive path in the first magnetically permeable material; the second electrically conductive path may be disposed alongside and in parallel with a second portion of the third electrically conductive path in the second magnetically permeable material.

An apparatus such as a power converter includes a transformer assembly, a first series circuit path, and a second series circuit path. The transformer assembly includes multiple windings such as a first winding and a second winding. The first series circuit path includes a first circuit component disposed in series with a first winding of the multiple windings; the second series circuit path including a second circuit component disposed in series with a second winding of the multiple windings. The first series circuit path is connected in parallel with the second series circuit path.

A vehicle is provided that includes a basic structure; and coupled to the basic structure, power sources, a propulsion system and power distribution circuitry. The propulsion system includes a plurality of electric motors configured to power propulsors to generate propulsive forces that cause the vehicle to move. The power distribution circuitry is configured to deliver DC electric power from the power sources to the electric motors, the power distribution circuitry including a plurality of DC-to-DC converter assemblies configured to input the DC electric power from the power sources and deliver voltage-regulated outputs to the electric motors, a DC-to-DC converter assembly operatively coupled to multiple ones of the power sources and multiple ones of the electric motors, and the DC-to-DC converter assembly including a multiple-input and multiple-output (MIMO) transformer with a single transformer core.

The invention relates to a vehicle charging device (2) for inductively charging an energy store (7) of a vehicle (1), the vehicle charging device (2) comprising an interface (5) for receiving electrical power, a first part comprising at least one coil, a second part comprising power electronics, the invention relates to a vehicle charging device (2) comprising an interface (5), power electronics configured to convert electric power received with said interface (5) into a defined alternating current, and a cooling system comprising a fluid accelerator, a fluid inlet and a fluid outlet, said cooling system being configured to cool the vehicle charging device (2) with a fluid, where the first and second parts are spatially separate, where the first and second parts are spatially separated, where the first and second parts are separated from each other. The cooling system includes a first cooling path disposed in a first portion and a second cooling path disposed in a second portion, where a fluid inlet is disposed in the first portion and a fluid outlet is disposed in the second portion, and where a fluid accelerator is configured to deliver fluid from the first cooling path to the second cooling path.

Provided is a circuit capable of accurately testing the number of coil turns even with a transformer having a high turns ratio.A transformer turns number testing circuit (1) is configured to be able to connect primary-side coils (Np1 and Np2) and secondary-side coils (Ns1 and Ns2) of a reference transformer (CT1) and a to-be-tested transformer (CT2) in phase and in series, and includes: a reference-side resistance element (R1) included in a reference-side loop circuit (Lp1) formed between both ends of the secondary-side coil of the reference transformer; a to-be-tested-side resistance element (R2) included in a to-be-tested-side loop circuit (Lp2) formed between both ends of the secondary-side coil of the to-be-tested transformer; and a voltage detector (Rd) provided in a common line of the reference-side loop circuit and the to-be-tested-side loop circuit, the common line connecting a midpoint between the secondary-side coils of the reference transformer and the to-be-tested transformer and a midpoint between the reference-side resistance element and the to-be-tested-side resistance element.