450results about "Fixed transformers" patented technology

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 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 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.

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 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 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.

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 application relates to a natural ester transformer winding structure, comprising a winding wire cake, further comprising: a shielding section arranged at the head end of the winding wire cake; and a large oil channel arranged at the head end and the tail end of the winding, the thickness of the large oil channel being larger than that of a basic oil channel in the winding. The above scheme provided by the application increases the longitudinal capacitance of the winding, the longitudinal capacitance can compensate the ground capacitance current of the winding, the impulse voltage distribution of the winding is more uniform, the impulse overvoltage capacity of the transformer is higher, if the shielding section is not used, the impulse voltage mostly falls on the head end of the winding, which is very harmful to the insulation of the head end of the winding, meanwhile, the arrangement of the large oil channel reduces the hot spot temperature rise of the winding end, improves the average temperature rise of the whole winding, ensures that the temperature rise of the transformer winding is more uniform, and further improves the reliability of the transformer during operation.

The utility model discloses a self-coupling phase-shifting transformer with a safe switching function, and particularly relates to the field of self-coupling phase-shifting transformers, which comprises an iron core, a high-voltage winding, a voltage-regulating winding, a public winding, a phase-regulating winding, a voltage-regulating on-load tap-changer, a phase-regulating on-load tap-changer and a no-load reversing tap-changer, the iron core comprises three central columns, and each central column is sequentially provided with a phase modulation winding, a voltage regulation winding, a common winding and a high-voltage winding from inside to outside. According to the utility model, when the potential of the tail end of the common winding is zero and the phase modulation on-load tap-changer is at a rated tap-changer position, the second electric mechanism of the no-load reversing tap-changer can be operated, and at the moment, the self-coupling phase-shifting transformer is at a zero phase angle position; the polarity conversion of the no-load commutation tap-changer can be ensured under the specific condition of zero phase angle, the safe operation of the no-load commutation tap-changer can be protected, and the safe switching is realized.

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.

To provide a device including an improved winding carrier.SOLUTION: A device (1) includes a winding carrier (2), at least one winding (3), a magnetic core (7), and first and second terminals (5, 6). The winding carrier (2) surrounds the magnetic core (7) in a defined area such that an insulation path between the terminals along the underside (14) of the device (1) does not include bridging by the magnetic core (7). In particular, the lower side (14) of the winding carrier (2) is in a closed configuration.SELECTED DRAWING: Figure 1A

A transformer including a core, such as, for example, a single-phase core, that includes a plurality of wound limbs, primary and secondary concentric windings formed on each limb of the plurality of wound limbs, and at least one tertiary concentric winding formed on fewer than all limbs of the plurality of wound limbs.

To provide a magnetic coupling type reactor capable of reducing loss.SOLUTION: A magnetic coupling type reactor comprises a core which has a first leg part and a second leg part extending in a first direction respectively and facing each other in a second direction orthogonal to the first direction, and a first coil and a second coil which are wound around the first leg part and second leg part so that directions of magnetic flux generated thereby differ from each other, and also includes a multilayer structure in which the first coil and the second coil are divided at least in the first direction in cross-sectional view along the first direction and the second direction.SELECTED DRAWING: Figure 4

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 three-phase choke comprises the following: an outer circumferential iron core and at least three iron-core coils that come into contact with or are attached to an inner surface of the outer circumferential iron core. The at least three iron-core coils have corresponding iron cores and corresponding windings wound around the iron cores, and gaps that can magnetically connect one of the at least three iron-core coils and an iron-core coil adjacent to the one ...

To improve the productivity of a transformer using a unicore.SOLUTION: In the transformer, a unicore is provided. The butt joint of the innermost block of the unicore is located at one position in the yoke part, and the butt joints outside the innermost block are located at two positions in the leg parts of the unicore.SELECTED DRAWING: Figure 1A

The invention relates to an N-phase transformer assembly (1, 1'-1""") with N phases for an N-phase LLC resonant converter, with N being a natural number greater than or equal to one. The N-phase transformer assembly (1, 1'-1""") comprises (i) a soft-magnetic core structure (2'-2‴‴), which soft-magnetic core structure comprises N openings (3, 3') passing through the soft-magnetic core structure and a closed-loop magnetic path (13) around each of the N openings (3, 3'), wherein at least one air gap (6) is present within the soft-magnetic core structure (2'-2‴‴), and (ii) N primary windings (4', 4", 4‴) and N secondary windings (5', 5", 5‴). The N primary windings and the N secondary windings correspond to a) each other in a bijective manner, to b) the N openings (3, 3') in a bijective manner and to c) the N phases in a bijective manner, wherein each primary winding of the N primary windings (4', 4", 4‴) is wound in such a way around the soft-magnetic core structure (2'-2‴‴) that it passes through the corresponding opening (3, 3'), wherein the N secondary windings (5', 5", 5‴) are not wound around the soft-magnetic core structure (2'-2‴‴) and each secondary winding of the N secondary windings (5', 5", 5‴) passes through the corresponding opening (3, 3'), wherein the corresponding primary winding and corresponding secondary winding pass through a same opening of the N openings (3, 3') and are part of a same phase of the N phases. For each phase of the N phases, (i) the corresponding primary winding is distanced from the corresponding secondary winding to provide through leakage a resonant inductance for a resonant tank of the LLC resonant converter, and the soft-magnetic core structure is designed to provide a magnetising inductance for the resonant tank of the LLC resonant converter.

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.

A light-source driving system includes a first controller, a switch circuit, and a second controller. The first controller is configured to control power transferred from a primary winding of a transformer to a first secondary winding and a second secondary winding of the transformer according to a load of a system circuit powered by the second secondary winding. The switch circuit is configured to enable the first secondary winding to provide a portion of the transferred power to a light source when the switch circuit is turned on. The second controller is coupled to the switch circuit and the first controller and is configured to monitor a status of the light source and control the switch circuit according to the status.

This application provides a planar transformer and a related device. The planar transformer includes a magnetic core. The magnetic core includes a first magnetic core cover, a second magnetic core cover, n first magnetic core pillars, and k second magnetic core pillars, the n first magnetic core pillars and the k second magnetic core pillars are disposed between the first magnetic core cover and the second magnetic core cover, and n and k each are an integer greater than 0. A primary-side winding and a secondary-side winding that are coupled to each other are disposed on each of the n first magnetic core pillars, and an auxiliary inductor winding is disposed on each of the k second magnetic core pillars. When power is supplied, a first magnetic flux cancels a part of a second magnetic flux when passing through the first magnetic core cover and the second magnetic core cover, the first magnetic flux is a magnetic flux generated by auxiliary inductor windings disposed on the k second magnetic core pillars, and the second magnetic flux is a magnetic flux generated by primary-side windings disposed on the n first magnetic core pillars. The planar transformer provided in this application becomes thinner.

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.