239results about "Fixed transformers" patented technology

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.

The present disclosure relates to a system (10) including a transformer (12) including a tank (14) configured to receive a liquid (20). The system (10) further includes an overflow device (22) and a connection device (24) configured to fluidly connect the tank (14) and the overflow device (22). The overflow device (22) includes an elastically deformable flexible member (26). The overflow device (22) is configured, under deformation of the flexible member (26), to periodically receive a portion of the liquid (20) from the tank (14) and return at least a portion of the received liquid to the tank (14) through the connection device. The system (10) further includes a heat transfer device (42) configured to provide a flow (44) of a cooling medium (46) in at least a portion of the overflow device (22) and / or the connection device. The present disclosure also relates to additional systems.

Transmission (210) for a vehicle (1201) with a drive shaft (221) and an output shaft (222), with an automatic transmission (213) composed of a plurality of planetary gear sets for switchable adjustment of a plurality of speed ratios between a speed of the drive shaft (221) and a speed of the output shaft (222), and with a reversing unit (215) connected in series in a drive connection between the drive shaft (221) and the output shaft (222) to the automatic transmission (213) for switchable adjustment of a reversal of the direction of rotation acting on the plurality of speed ratios between a direction of rotation of the drive shaft (221) and a direction of rotation of the output shaft (222), characterized in that the transmission (210) has a transmission housing (225; 441, 443, 545) in which the automatic transmission (213) and the reversing unit (215) are jointly arranged are that the gearbox housing (225;441, 443, 545) a housing wall (441, 545) extending continuously in the direction of extension of the drive shaft (221) and the output shaft (222) and enclosing the automatic transmission (213) and the reversing unit (215), and a housing cover (443) closing the housing wall (441, 545) on the side of the output shaft (222), wherein the output shaft (222) extends through an opening in the housing cover (443).

The invention relates to an iron core for a transformer and the transformer. The present invention suppresses an increase in process coefficient due to magnetic flux transfer in the lamination direction of an iron core by controlling the variation in the thickness of an insulating film of an oriented electromagnetic steel sheet with an insulating film used in the iron core. The iron core for the transformer is formed by stacking a plurality of single layers formed by one or a plurality of oriented electromagnetic steel plates with insulation films, and each single layer is provided with at least one steel plate discontinuous part extending along the direction intersecting with the flow direction of magnetic flux in the single layer. The standard deviation (sigma) of the thickness of the insulating film in a region sandwiched between the steel plate discontinuous section of one single layer and the steel plate discontinuous section of the other single layer, which are adjacent in the lamination direction, is 2-5 [mu] m (inclusive).

The present application relates to a kind of transformer winding and transformer for inhibiting inter-pie potential difference, comprising: first tap pie, including first knotted section and first continuous section connected with each other, and the turns of wire on first knotted section and first continuous section all include multiple turns;Second tap pie, including second knotted section and second continuous section connected with each other, and the turns of wire on second knotted section and second continuous section all include multiple turns;Wherein, the turns of wire of first continuous section and the turns of wire of second continuous section are adjacent number of turns continuous;First knotted section is connected with second knotted section, and the turns of wire of first knotted section and second knotted section are adjacent number of turns discontinuous.Above-mentioned transformer winding for inhibiting inter-pie potential difference, can be adjusted the number of turns of knotted section, to effectively inhibit the inter-pie potential difference of knotted winding.The method for improving the inter-pie potential difference distribution of knotted structure winding of traditional, effectively inhibits the inter-pie potential difference under the lightning impulse of winding, improves insulation reliability, easy to operate, will not increase production cost.

To provide a magnetic element which is available as a non-contact connector while suppressing a size or cost by reducing the number of components.SOLUTION: A magnetic element 100 comprises: a first magnetic component 102 including two or more coils 12 (12a, 12b); and a second magnetic component 104 which is paired with the first magnetic component 102 and separated from the first magnetic component 102. Two magnetic flux paths are switched by inverting magnetic flux generated from at least one of the coils 12 (12a, 12b), thereby switching between a non-contact connector mode in which the first magnetic component 102 and the second magnetic component 104 are magnetically coupled and operated as a non-contact connector which performs power transmission with no electrical contact in one magnetic flux path and a single body mode in which the first magnetic component 102 is operated as a single body in the other magnetic flux path.SELECTED DRAWING: Figure 1

We provide liquid-cooled thermal management solutions to improve volumetric power density for pulse load power converters and other applications where space is constrained. [Solution] A power converter using a liquid cooling system to cool a liquid-cooled transformer 100, wherein the coils 135 of the transformer 120 are in physical / thermal contact with a cold plate 160 embedded in a thermally conductive solid (epoxy or resin) and sandwiched between the coils and / or in contact with the outer surface of the coils. In addition / or, the cold plate may also be in physical / thermal contact with the transformer core. A cooling fluid is supplied so as to flow through the cold plate. In another embodiment, the transformer is immersed in a cooling fluid such as oil in a thermally controlled housing that houses the coils. The cold plate is in physical / thermal contact with the housing. The cooling fluid supplied into the cold plate conducts heat from the oil-surrounded transformer.

This invention relates to a method for improving the axial short-circuit withstand capability of a vegetable oil transformer. The method includes: arranging the number of turns of the high-voltage and low-voltage winding coils of the vegetable oil transformer in a symmetrical vertical structure, placing the partially turned coils at the upper and lower ends of the windings; and arranging the radial oil channels of the high-voltage and low-voltage windings in a symmetrical vertical structure, placing the larger oil channels at the upper and lower ends of the windings to ensure symmetrical oil channel arrangement. The above-mentioned solution provided in this application, by arranging the number of turns of the high-voltage and low-voltage winding coils in a symmetrical vertical structure, and simultaneously arranging the radial oil channels of the high-voltage and low-voltage windings in a symmetrical vertical structure, ensures symmetrical oil channel arrangement, thereby effectively reducing the ampere-turn imbalance rate of the windings, thereby reducing the radial leakage flux during winding short circuits, reducing the axial force on the coils, improving the axial stability of the windings, and improving the axial short-circuit withstand capability of the vegetable oil transformer.

A distribution transformer for use in a providing electrical power to sites, includes a ferromagnetic core; a primary winding configured to be connected to a source grid at source grid voltage; and a secondary winding configured to be coupled to service cables to supply electrical energy to at least one of the sites at a first line voltage and at least another of the sites at a second line voltage, wherein the second line voltage is higher than the first line voltage.

The present invention relates to a winding arrangement (10) of a transformer (100), including at least one first winding (14) wound about at least one winding axis (16) and configured to be arranged about at least a portion of a core (102) of the transformer (100) and at least one second winding (22) wound at least partially about the first winding (14). The second winding (22) has a variable distance (30) from the first winding (14) along a length (32) of the second winding (22) which extends along the winding axis (16). The distance (30) between the first winding (14) and the second winding (22) is the smallest at a center or middle section (40) of the length (32) of the second winding (22). The present invention further relates to a transformer (100) and a method of manufacturing a winding arrangement (10) of a transformer (100).

The roll core (10) is configured by winding a grain-oriented electrical steel sheet (11) in the rolling direction. In a cross-section parallel to the rolling direction in a bent portion of a corner portion (12) of the roll core (10), the average value of KAM values in a region from the center of the plate thickness of the grain-oriented electrical steel plate (11) to the outer peripheral side of the roll core (10) is Kout, and the average value of KAM values in a region from the center of the plate thickness of the grain-oriented electrical steel plate (11) to the inner peripheral side of the roll core (10) is Kin. And the KR, which is defined by KR = Kin / Kout, is 1.05 to 1.6 inclusive.

A two-phase liquid-cooled power plant includes multiple cooling circuits that recirculate each working fluid around a closed-loop fluid path and transition it between liquid and vapor states to cool multiple devices. A portion of each fluid path is integrated with or in thermal contact with the device. The working fluid evaporates in each portion of the fluid path, maintaining operating temperatures at or near each of the different phase transition temperatures. The cooling circuits can be used to maintain different operating temperatures for hollow primary and secondary winding coils in a power transformer, parallel-connected hollow winding excitation coils and a common magnetic core in an electrical reactor, power semiconductor devices mounted on heat sink(s) with embedded fluid paths, or power semiconductor devices through which each fluid path passes.

The aerosol-generating device includes a housing, and a power supply configured to supply electrical power to a heating element by way of a transformer assembly within the housing. The transformer assembly includes a magnetic flux guide, a primary circuit including a primary winding extending around a first portion of the magnetic flux guide and electrically connected to the power supply, and a secondary circuit including a secondary winding inductively coupled to the primary winding and extending around a second portion of the magnetic flux guide. The number of turns in the primary winding is greater than the number of turns in the secondary winding. The secondary circuit includes at least two electrical contacts configured to form an electrical connection with the heating element.

Provided are a method and apparatus for predicting a current of a load (550) in an autotransformer (540). A processor is configured to obtain a value of a current of a first input terminal (520) and a value of a current of a first stage of an autotransformer (530), predict whether a plurality of loads are unbalanced, based on the value of the current of the first input terminal (520), the value of the current of the first stage (530), and a characteristic of the autotransformer (540), and determine whether to open a relay (510), based on a result of the prediction and a current flowing through the autotransformer (540), wherein a turn ratio of the autotransformer (540) is 1.

To provide a transformer in which an iron core and a coil can be assembled easily and productivity can be improved, and to provide a transformer assembling method.SOLUTION: In a transformer in which two iron cores 100 in which a plurality of rectangular cylindrical bodies 111 bent in a rectangular cylindrical shape overlap in a thickness direction are inserted into a coil 200 such that long side portions 120 are adjacent to each other, both end portions 11211122 of each rectangular cylindrical body 111 in a bending direction are butted against each other, and each iron core 100 has a portion 112 of each rectangular cylindrical body 111 on one end side of the long side portion 120.SELECTED DRAWING: Figure 2

The present invention relates to a power supply device comprising a power supply circuit component and a planar transformer. The power supply circuit component comprises a first printed circuit board and a power conversion module, the first printed circuit board comprising a first surface and a second surface arranged opposite each other, and the power conversion module being arranged on the first surface. The planar transformer comprises a magnetic core assembly, at least one second printed circuit board, and at least one coil module, the magnetic core assembly comprising a first magnetic core and a second magnetic core, at least one of the first and second magnetic cores being arranged adjacent to the first printed circuit board, at least one second printed circuit board being arranged between the first magnetic core and the second magnetic core and comprising a first coil, at least one coil module being arranged between the first magnetic core and the second magnetic core and comprising a second coil and an injection-molded layer, the injection-molded layer covering at least a portion of the outer surface of the second coil.

The utility model discloses a transformer winding and three-phase transformer relates to transformer technical field, the transformer winding includes the two coil that distributes along the vertical direction, the opposite end face of two coil is both the meshing surface, each meshing surface protrudes towards the other meshing surface to form a plurality of protrusions, the multiple protrusions are distributed in the circumferential direction of the corresponding meshing face at intervals, a groove is formed between any two adjacent protrusions on each meshing face, the multiple protrusions of any meshing face and the multiple grooves of the other meshing face are consistent in number and correspond to each other in a one-to-one mode, and the correspondingly-arranged protrusions and the grooves are matched in shape. And the bulges on one meshing surface are inserted into the corresponding grooves on the other meshing surface, so that the two coils are meshed. According to the transformer winding, when the upper coil and the lower coil are in butt joint, the protrusions of the upper coil are inserted into the grooves of the lower coil, so that the upper coil and the lower coil are tightly attached, the upper coil and the lower coil can be effectively prevented from shaking relatively in the transportation process, and reliability is better.

This utility model relates to the field of power equipment technology, specifically to a three-winding oil-immersed transformer suitable for new energy wind power systems. By integrating low-voltage, medium-voltage, and high-voltage windings into one device, combined with a longitudinal seven-step core design, a compact layout with the low-voltage winding located inside, the medium-voltage winding in the center, and the high-voltage winding located outside, and a reinforced structure where the low-voltage leads are wrapped with 3mm thick corrugated paper and the medium and high-voltage leads are fixed with multi-strand cables and multi-position wooden clamps, this effectively solves the problem that traditional dual-winding transformers can only output two voltages and cannot meet the high / medium / low voltage multi-terminal grid connection requirements of wind power systems. The use of a U-shaped oil tank and high-strength dry bushings further reduces the equipment footprint, investment cost, and maintenance complexity, while improving impact resistance and heat dissipation performance, perfectly adapting to the trend of increasing single-unit installed capacity in new energy power generation.

The invention relates to the field of transformers, and particularly discloses an intelligent oil-immersed wound core power transformer and a using method.The intelligent oil-immersed wound core power transformer comprises a transformer body and a plurality of main heat dissipation fins, gaps are formed between the main heat dissipation fins, heat dissipation cavities are formed in the main heat dissipation fins, and the upper ends and the lower ends of the heat dissipation cavities communicate with the interior of the transformer body; oil in the transformer body can pass through the heat dissipation cavity; the bottom end of the heat dissipation cavity and the interior of the device body are sealed through a first pressure valve, the first pressure valve is configured to enable liquid in the heat dissipation cavity to flow into the device body under extrusion, and liquid in the device body cannot enter the heat dissipation cavity; an oil inlet nozzle is connected to one end, close to the interior of the transformer body, of the heat dissipation cavity; according to the configuration of the oil inlet nozzle, when the oil is all located in the transformer body, the liquid level of the oil is higher than the oil inlet nozzle, and when the oil is higher than the oil inlet nozzle in use, the oil enters the heat dissipation cavity from the oil inlet nozzle, the temperature of the oil is transmitted to the main heat dissipation fins, heat exchange is conducted between the oil and external air, and the purpose of oil heat dissipation is achieved.

A power supply according to an embodiment comprises: a substrate; a switching unit disposed on the substrate and alternately switching input direct current power so as to convert same into alternating current power; a transformer disposed on the substrate and converting the level of the alternating current power; a rectifying unit disposed on a substrate and rectifying the alternating current power having the level converted by the transformer; and an output inductor disposed adjacent to the transformer and having one end connected to the transformer, wherein a plurality of terminals included in the transformer include first and third terminals, a second terminal located between the first terminal and the third terminal, and an additional terminal extending from the second terminal to the outside of the first or third terminal, and the one end of the output inductor is connected to the additional terminal of the transformer.

To provide an RF filter that allows RF power to be provided to a heating element in an RF electrode without ingress.SOLUTION: A radio frequency (RF) filter includes an inductive element having a plurality of coil sections collectively forming a non-split coil of a cable of a twisted magnetic wire. The coil sections have different winding pitches. The cable of the twisted magnetic wire is configured for at least one channel, with two wires per channel. The cable of the twisted magnetic wire is connected at a first end to an electrical component that is to receive power from a power source, and the cable of the twisted magnetic wire is connected at a second end to a power source. A terminating capacitive element is electrically connected between a reference ground potential and each wire of the cable of the twisted magnetic wire at a respective location between the second end of the inductive element and the power source.SELECTED DRAWING: Figure 6

Power control apparatus for modulating electrical power signals and methods for modulating electrical power signals are disclosed. In one example, a power control apparatus comprises a magnetic core comprising a first limb and a second limb, with a primary winding around the first limb, and a secondary winding around the second limb. The power control apparatus comprises a voltage source converter having an AC connection, a DC connection, and a controller. The controller is configured to receive data associated with parameters of a first signal in the primary winding, compare the parameters of the first signal to parameters of a reference signal for the secondary winding, determine a harmonization signal which, when applied to the first limb, causes a second signal in the secondary winding to approximate the reference signal. The controller is configured to cause application of the harmonization signal to the first limb using the voltage source converter.

A power conversion apparatus includes: a three-phase inverter converting direct-current power into alternating-current power for a propulsion motor; and a magnetic core. The magnetic core includes: first and second cores penetrated by both a three-phase alternating-current power line and a common mode current circulation line; and a third core penetrated only by the three-phase alternating-current power line. The first core is disposed on a side closer to the three-phase inverter, the second core is disposed on a side closer to the propulsion motor, and the third core is disposed between the first core and the second core. In the first, second, and third cores, when at least one of three electric wires in the three-phase alternating-current power line is drawn out of the second core toward the propulsion motor, the at least one of the three electric wires is not in parallel with remaining one or two electric wires.

The invention provides an iron core for dismounting / transporting a transformer, which can control the performance reduction of the dismounting / transporting transformer. An iron core of a disassembly / transportation transformer for a disassembly / transportation transformer is a three-phase / five-column iron core in which a main column, a side column, and a plurality of yokes connecting an upper end portion and a lower end portion of the main column or the side column are formed by laminating a plurality of steel plates, the lower yoke connecting the lower end portions of the adjacent main columns and the lower yoke connecting each lower end portion of the main columns and the side columns are separated by two separation portions, and the steel plates are laminated at the separation portions by moving the positions of the steel plates at the continuous layers in the extension direction of the lower yokes, and a lap length at each of the partition portions provided at the lower yokes connecting the adjacent main columns is different from a lap length at each of the partition portions provided at each of the lower yokes connecting the main columns and each of the lower end portions of the side columns.

The application discloses a 72-pulse phase-shifting rectifier transformer and a turn number configuration method. A secondary winding comprises a first winding section, a second winding section and a third winding section, and a primary winding comprises a first winding, a second winding and a third winding. Each winding section comprises four windings, each winding comprises a phase-shifting section and a basic section, the basic section is located in the inner extension of the winding section, and the phase-shifting section is located in the outer extension of the winding section. The phase-shifting angles of the first winding section relative to the first winding are respectively -25°, -10°, 5° and -20°, the phase-shifting angles of the second winding section relative to the second winding are respectively -20°, -5°, 10° and 25°, and the phase-shifting angles of the third winding section relative to the third winding are respectively -15°, 0°, 15° and 30°. Twelve phase-shifting angles are used to output a three-phase circuit, a better power supply than the same winding elimination harmonic ability is obtained, multiple harmonics can be eliminated, high-order harmonics can be effectively suppressed, and temperature rise and loss can be reduced.

The present technology relates to circuit breaker devices having current sense transformers. The current sense transformer includes a core, a secondary winding, and a primary winding coupled to the power input. The secondary winding includes a first wire wrapped around the core a number of secondary winding turns. The primary winding includes a second wire wrapped around the core a number of primary winding turns. The number of primary winding turns includes a first number of primary winding turns in a first direction and a second number of primary winding turns in an opposite direction that magnetically cancel out the second number of primary winding turns in the first direction to generate an effective number of primary winding turns. The effective number of primary winding turns and the number of secondary winding turns make up a desired turns ratio.

To provide magnetic components and circuit devices that can be miniaturized and have high versatility. [Solution] The magnetic component MC comprises a non-inductive winding set (first non-inductive winding set 1) which is formed by connecting a pair of windings (first winding 1a, second winding 1b) wound so that the current flows in opposite directions to cancel out the magnetomotive force, and an inductive winding (first induction winding 2a, second induction winding 2b) wound to generate a magnetomotive force. In the magnetic component MC, the pair of windings included in the non-inductive winding set are arranged on the same magnetic path.

The present application provides an integrated magnetic assembly and a manufacturing method thereof for a multi-module DC-DC converter. The integrated magnetic assembly includes N primary windings, N secondary windings and N magnetic cores, and N is an integer greater than 1. The N magnetic cores are sequentially arranged, and each magnetic core includes a plate, a first common magnetic core column, a second common magnetic core column, an inductor magnetic core column and a transformer magnetic core column. The first common magnetic core column and the second common magnetic core column are arranged on the first side and the second side of the plate respectively. The inductor magnetic core column is configured to be wound with corresponding primary windings or corresponding secondary windings, and the transformer magnetic core column is configured to be wound with corresponding primary and secondary windings which are interleaved with each other.

To provide a soft magnetic powder capable of producing compacted powder with high packing properties, good magnetic properties, and the ability to withstand high voltages; a compacted magnetic core and magnetic element containing such soft magnetic powder; and an electronic device equipped with the magnetic element. [Solution] A soft magnetic powder characterized in that it is composed of Fe as the main component, Si in a content of 2.5% to 7.5% by mass, Cr in a content of 0.5% to 10.0% by mass, Al in a content of 0.05% to 0.50% by mass, C in a content of 0.005% to 0.050% by mass, and impurities, wherein a weighed 0.5g sample is placed in a cylinder with an inner diameter of 8mm and an axis in the vertical direction, and the withstand voltage is measured while the sample is sandwiched between electrodes from above and below and a load of 20 [kgf] (196 [N]) is applied, and the withstand voltage is measured to be 400 [V] or more.