112 results about "Planar transformers" patented technology

The invention discloses a low-loss planar transformer design method suitable for an LLC resonant converter, and the method comprises the steps: firstly collecting the index parameters of the LLC resonant converter, setting the target parameters of a planar transformer, selecting a magnetic core model meeting the requirements according to an AP method, and then carrying out the design of a winding structure, finally, modeling and simulation of the planar transformer are completed in finite element software, and if the simulation result does not meet the set parameter and loss requirements, selection of the magnetic core model and design of the winding structure need to be conducted again; and if the set parameters and the loss requirements are met, finishing the design.

The utility model provides a high-power switching power supply planar transformer with an adjustable turn ratio, which comprises a magnetic core, and a winding component is fixed in the magnetic core; the winding assembly is formed by stacking a plurality of secondary winding copper sheets and a plurality of primary winding copper sheets in a crossed mode, two primary leading-out terminals are arranged on the side portion of the same end of each primary winding copper sheet, and two secondary leading-out terminals are arranged on the end portion of each secondary winding copper sheet. The primary leading-out terminal connects a plurality of primary winding copper sheets in series through a primary fixing bolt, and the secondary leading-out terminal connects a plurality of secondary winding copper sheets in series through a secondary fixing bolt. According to the utility model, a plurality of primary leading-out terminals and secondary leading-out terminals are arranged on the winding, and the primary and secondary turns of the transformer can be flexibly selected by connecting different leading-out terminals; and the tedious process in the PCB winding manufacturing process is omitted, the raw material cost and the production and processing cost are greatly reduced, and the production period is shortened.

The invention discloses a design method of a PCB (Printed Circuit Board) integrated multi-winding planar transformer, which comprises the following steps of: forming a flat spiral or snake-shaped wire, a primary winding and a secondary winding on a multi-layer PCB through an etching process; the primary winding and the secondary winding are alternately arranged in different layers of the PCB, and an even-number-layer symmetrical laminated structure is adopted for layout; a flaky soft magnetic material with high magnetic conductivity is selected as a magnetic core, and the magnetic core is embedded into the slotting area of the PCB to be fixed; a grounding shielding layer is inserted between the adjacent winding layers; a heat conduction via hole array is arranged in a winding area of the PCB, heat generated by a winding layer is conducted to a large-area heat dissipation copper foil on the bottom layer of the PCB, and a vertical heat dissipation channel is formed. According to the planar flyback transformer, the windings are etched on the multi-layer PCB, the alternating symmetrical layout is adopted, the magnetic core is embedded, and the shielding layer and the heat conduction via hole array are arranged, so that the integrated design of the planar flyback transformer is realized.

The invention discloses a PCB and a production method and application thereof, the PCB comprises a PCB substrate, the PCB substrate is provided with a plurality of pads, a planar transformer and a plurality of lines, the PCB substrate is provided with first grooves corresponding to the pads one by one, and the PCB substrate is provided with second grooves corresponding to the planar transformer; copper foil layers are deposited on the inner wall of the first groove and the surface of the PCB substrate corresponding to the plurality of lines, so that a bonding pad and lines are formed, and a tin alloy layer is arranged on the copper foil layer corresponding to the bonding pad area; the planar transformer is embedded in the second groove, the planar transformer comprises a magnetic core and a coil, and the coil is electrically connected with the copper foil layer. According to the invention, the generation of welding spot bubbles can be effectively avoided, the welding quality and the heat dissipation performance can be improved, the production process can be simplified, the production cost can be reduced, and the product integration can be improved.

This invention provides a planar transformer and a power conversion circuit, comprising a first composite winding layer, a second composite winding layer, a third composite winding layer, a fourth composite winding layer, and a primary winding, arranged sequentially from top to bottom. The first composite winding layer includes a first winding and a second winding; the second composite winding layer includes a third winding; the third composite winding layer includes a fourth winding; and the fourth composite winding layer includes a fifth winding and a sixth winding. The advantages of this invention are: it provides a planar transformer with a reasonable structure that can effectively suppress common-mode noise. This planar transformer does not have a shielding winding between the primary and secondary windings; by adjusting the structure of the secondary winding, it achieves the purpose of reducing common-mode noise, reducing the number of PCB layers, lowering production costs, and reducing debugging time, thus possessing good practical and application value.

The application discloses a planar transformer and a processing equipment thereof, and relates to the technical field of assembling equipment. The planar transformer and the processing equipment thereof comprise a feeding mechanism and a stacking mechanism. The feeding mechanism is connected with the stacking mechanism and is used for transmitting three parts of the planar transformer to the stacking mechanism respectively. The three parts are stacked and bonded by the stacking mechanism. The bottom of the feeding mechanism and the bottom of the stacking mechanism are both arranged to be inclined to facilitate the sliding of the parts. The three sheet-shaped parts of the planar transformer are positioned and stacked and bonded in a folding mode. The assembling precision is ensured, and a mechanical arm and other precise and high-cost equipment and a high-precision control system are not needed, so that the cost is greatly reduced, the same effect can be achieved, the air supply assembly can simultaneously utilize the air suction and air outlet functions, the parts can be sucked to avoid falling during the turning, and the parts can be blown out after the stacking, so that the operation is simple and convenient.

A set of two planar transformers comprising a magnetic core and at least two printed circuit boards, each printed circuit board comprising: - at least one layer of electrically insulating material and at least one first and second electrically conductive tracks, and - at least one primary winding is formed by the first track and at least one secondary winding formed by the second track, and the magnetic core, comprising: a first part defining a first end of the first transformer, a third part defining a second end of the second transformer, and a second part disposed between the first and third parts and shared between the two transformers, the second part of the magnetic core comprising a plate and several branches perpendicular to the surface of said plate, all or part of these branches passing through both of the printed circuit boards.Abbreviation figure: Figure 1.

This invention discloses a planar transformer winding preparation device and method, relating to the field of planar transformer winding preparation technology. The device includes a conductor assembly comprising two C-shaped clamps symmetrically distributed, with a guide seat fixed between them. A column is vertically fixed to the upper end of the guide seat, and an inverted portal frame is fixed to the upper end of the column. An I-beam wheel is rotatably mounted at the bottom inner side of the inverted portal frame, and an elliptical pressure roller rolls onto the I-beam wheel. A lifting rod is rotatably sleeved within an annular groove, and an elliptical steel ring is fixed to the upper end of the lifting rod. The two sidewalls of the elliptical steel ring are fixedly connected to the upper end of the inner sidewall of the inverted portal frame. This invention increases the sliding resistance between the copper wire and the outer wall, tensioning the output copper wire and preventing differences in resistance between the inner and outer copper wires, thus avoiding a voltage difference between them and preventing excessive heat generation that could significantly degrade the transformer winding performance.

The invention discloses a winding jig for manufacturing an EMI coil of a planar transformer and an EMI coil manufacturing method, and relates to the technical field of transformer manufacturing, the winding jig comprises a plurality of winding reels which are sequentially arranged in a sleeving mode, and the winding reels comprise an inner ring winding reel, an outer ring winding reel and at least one middle winding reel; the winding reel and the next winding reel are in sliding fit with each other in the axial direction of the winding reel; the front end of the middle winding reel and the front end of the outer ring winding reel are each provided with a wire pushing part, and when the winding reel slides forwards relative to the previous winding reel, the wire pushing parts on the winding reel push winding wires wound on the outer side face of the previous winding reel forwards. The winding jig can be used for adjusting the intervals of the windings to control the distributed capacitance, and diversified matching with the EMI requirement of the whole power supply is achieved; according to the winding jig structure, the corresponding preparation method is easy to realize automation and has the cost advantage, and the efficiency of power supply and transformer manufacturers is improved.

This utility model discloses a high-frequency planar transformer, including a transformer body, a planar winding, a cover, and a magnetic core. The planar winding is internally arranged in the transformer body and is formed by stacking PCB boards sequentially. A magnetic core is located at the center of the outer surface of the planar winding, and the magnetic core includes a lower base and an upper cover. The planar winding passes between the lower base and the upper cover, and pins are provided on both sides of the bottom of the planar winding, extending to the outside of the transformer body. Side posts are provided on both sides of the top of the lower base, and a center post is located at the center of the top of the lower base. A pre-drilled hole is provided at the center of the planar winding. This utility model, by installing the transformer body, planar winding, and magnetic core, ensures tight contact between the magnetic core and the winding, resulting in low leakage inductance. The upper cover and lower base are fixed with adhesive, leading to more uniform stress distribution and reducing the risk of magnetic core cracking.

This invention relates to the field of planar transformer technology, and in particular to a planar transformer, comprising a magnetic core, a winding assembly, the winding assembly including a primary winding and a secondary winding, an input terminal and an output terminal, an insulating partition, and a fixing clip, the fixing clip cooperating with a fixing slot on the magnetic core for fixing the upper and lower magnetic cores together; and a contact assembly disposed within the upper magnetic core, for automatically connecting the input and output terminals to the primary and secondary windings respectively and providing a locking effect. By setting the contact assembly inside the upper magnetic core, and utilizing an elastic column, a bending rod, and a linkage transmission mechanism, the electrical connection between the primary winding and the input terminal, and between the secondary winding and the output terminal, is automatically completed during the assembly of the upper and lower magnetic cores, without the need for additional welding processes. This organically combines the mechanical assembly action and the electrical connection action of the magnetic core, achieving an integrated effect of "assembly equals connection".

The invention discloses a planar transformer multi-pin pressing clamp which comprises a base, supporting columns installed on the two sides of the top end of the base, a supporting plate transversely arranged on the supporting columns and flush with the base, and a bearing plate installed on the base and used for supporting a planar transformer PCB, and a pressing plate is transversely arranged between the supporting plate and the bearing plate. The supporting plate is provided with a pressing pushing part used for driving the pressing plate to press the planar transformer PCB downwards. According to the invention, the operation is simple, the fixture is used as a support, the PCB is positioned and limited after being glued and stacked, the central hole and the flatness of the PCB after being glued and stacked are effectively solved one by one, the investment of human resources and the waiting time are reduced, and the operability and the consistency of the planar transformer in the processing process are ensured.

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 invention discloses a precise tin soldering device for pins of a planar transformer, which relates to the technical field of tin soldering equipment for pins of transformers and comprises a machine body, a tin furnace arranged at the bottom of the machine body, a baffle arranged at the top of the outer wall of the tin furnace, a transformer copper sheet body arranged at the top of the tin furnace and a loading mechanism arranged outside the machine body. The elastic force releasing mechanism is arranged in the loading mechanism, through the arrangement of the loading mechanism and the elastic force releasing mechanism, air in gaps can be discharged in a similar'extraction 'mode when tin soldering is conducted on the transformer copper sheet body, bubbles can be reduced, and then the problem of insufficient soldering is prevented; when the counterweight top block moves upwards, the gap of the transformer copper sheet body is converted from'closed 'into'negative pressure', a complete and gapless soldering tin connecting surface is formed, the phenomenon that a soldering tin point falls off or loosens due to vibration and temperature change in subsequent use is avoided, and the structural stability of pin connection of the planar transformer is ensured.

Disclosed is a PCB of a planar transformer including: a PCB substrate with a through hole and a double-sided winding part formed on double sides of the PCB substrate, wherein the double-sided winding part is of a symmetric structure, a via hole consistent with the through hole is formed in the center of the double-sided winding part, the via hole is aligned to the through hole to form a magnetic core hole, and the circumference of the via hole is raised to form wire blocking parts; and forming a wire passing groove in the wall of the magnetic core hole, wherein the wire passing groove allows a metal conducting wire to pass through to be planarly wound from inside to outside on double sides of the double-sided winding part at the same time so as to form two coils in series located on the double sides of the PCB substrate.

The invention discloses an oil-immersed amorphous planar transformer, and relates to the technical field of transformers, the oil-immersed amorphous planar transformer comprises a case, an upper cover, an exhaust pipeline, a pressure release valve, a foam pushing assembly, a defoaming assembly and a collecting assembly; the foam pushing assembly reciprocates up and down along the exhaust pipeline along with the change of the air pressure in the case, when the temperature in the case is increased and the air pressure is also increased, the foam pushing assembly moves upwards, and when the air pressure is reduced, the foam pushing assembly automatically moves downwards; the defoaming assembly reciprocates along with the foam pushing assembly, the defoaming assembly rotates relative to the exhaust pipeline, bubbles reaching the bottom of the exhaust pipeline can be effectively removed in the rotating process, and the bubbles are prevented from entering an air escape valve along with pressure rise. And in the up-and-down reciprocating movement process of the foam pushing assembly, the collecting assembly can collect and store impurities in the oil liquid below the foam pushing assembly.

This invention discloses a high-frequency, low-loss planar transformer core structure, relating to the field of planar transformer technology. It includes a multi-layered outer shell; a core support component is adjustable on the top of the multi-layered shell; modular core components are mounted and fixed on the core support component; magnetic flux at the air gap edge is eliminated through a composite magnetic circuit of ferrite and soft magnetic composite materials, reducing eddy current losses; and elastically pre-tightened core columns ensure magnetic circuit stability. A three-stage heat dissipation system is employed, consisting of heat pipe equalization, microchannel liquid cooling, and shell radiation, reducing the hot spot temperature difference to within 5°C and achieving a thermal resistance of only 0.05 K / W. Elastic gaps compensate for assembly tolerances and thermal expansion, guide locking enables precise positioning, and shock absorbers attenuate vibration by more than 80%. Integrated temperature, pressure, and strain sensors provide over-temperature protection, dynamic heat dissipation, and stress warning.

The application discloses a planar transformer aging prediction parameter correlation analysis method, system and device, and relates to the technical field of planar transformers. The application receives change data of to-be-analyzed parameters of a planar transformer at different time points; takes data recorded at zero time as a standard value to normalize the rest of the data; processes the normalized data through curve fitting to take parameter data with a slope closest to 1 as a reference sequence; uses a grey correlation degree analysis method to calculate correlation coefficients of the rest of the parameters and the selected reference sequence, and normalizes the correlation coefficients. The application uses the grey correlation degree analysis method to comprehensively apply multiple parameters of the planar transformer, provides a theoretical basis for weight distribution when the influence of the multiple parameters on the prediction process is comprehensively considered, and finally constructs a planar transformer life prediction model according to a mathematical statistics method, thereby improving the accuracy and reliability of planar transformer aging prediction.

Described is an apparatus comprising a substrate, a first coil below a surface of the substrate, and a second coil below the surface of the substrate. The first coil has first and second ends. In at least one example, the second coil is laterally adjacent to the first coil, the second coil having third and fourth ends. The apparatus further comprises a semiconductor die on the surface of the substrate and coupled to the first and third ends via metal interconnects in the substrate. The apparatus comprises a passive component on the surface of the substrate and coupled between the second end and the fourth end, the passive component overlapping at least parts of the first and second coils.

The invention belongs to the technical field of high-frequency planar transformers, and relates to a planar transformer with trapezoidal double-concave waist side columns for a CDR converter, which comprises a primary side 8-shaped winding, a secondary side fractional-turn winding, two circular middle column magnetic cores, two rectangular side column magnetic cores and a trapezoidal double-concave waist side column magnetic core, the trapezoidal double-concave waist core column is positioned on the outer side between the two circular middle columns, and forms a triangular layout with the circular core column; the primary side 8-shaped winding is wound around the two circular core columns in an 8-shaped manner in the anticlockwise direction; the secondary side fractional-turn winding is composed of four independent half-turn windings which are wound around the two rectangular side columns and the two circular middle columns respectively. According to the invention, the problem that the transformer of the CDR topology simultaneously realizes the inductance magnetic integration and the winding fractional turn is solved, so that the converter of the CDR topology can still consider the advantages of the magnetic integration and the fractional turn in a follow current state, and the loss of the whole machine is obviously reduced.

The utility model relates to the technical field of electrical equipment, and specifically relates to a high -voltage DC -DC panel transformer, and the transformer includes two groups of symmetrically arranged magnetic core positioning blocks, and the opposite sides of the two groups of magnetic core positioning blocks are equipped with fixed slots, the middle part of the fixed slot is equipped with a magnetic core column, the fixed slot is equipped with the winding coil and the annular sheet that are alternately stacked, the magnetic core column passes out the annular sheet bending center and winding coil spin center, and the two groups of winding coils are equipped with the isolation ring, have good practicality and economy, and is beneficial to the promotion and use of equipment.

The invention relates to the technical field of planar transformers, in particular to a PCB (printed circuit board) high-power planar transformer, which adopts the technical scheme that the PCB high-power planar transformer comprises a plurality of layers of PCB substrates and a magnetic core penetrating through the plurality of layers of PCB substrates, the plurality of layers of PCB substrates at least comprise a first PCB layer and a second PCB layer, a primary winding is arranged on the first PCB layer, a secondary winding is arranged on the second PCB layer, and the magnetic core is arranged between the first PCB layer and the second PCB layer. The primary windings and the secondary windings are electrically connected between layers through metalized through holes, and the primary windings and the secondary windings are arranged in adjacent PCB layers in a staggered mode. The winding type transformer has the advantages of low leakage inductance and high power density, and solves the problems of large leakage inductance and large size of a traditional winding type transformer in high-frequency and high-voltage application.

This application discloses a planar transformer, comprising: a first circuit board having a first through hole, a first winding portion, and a plurality of first connecting portions, each first connecting portion being electrically connected to the first winding portion; a second circuit board having a second through hole, a second winding portion, and two second connecting portions, each second connecting portion being electrically connected to the second winding portion, the first circuit board and the second circuit board being stacked, and each first connecting portion being electrically connected to the second connecting portion; a magnetic core extending into the first and second through holes to form an electromagnetic induction path, the magnetic core including a first magnetic portion and a second magnetic portion facing each other to clamp the first circuit board and the second circuit board; and a plurality of terminals electrically connected to corresponding first and second connecting portions. This application can reduce the height and board area of ​​the product, which is beneficial for the wiring design of high-current windings, and the product can be modified and functional components can be added by disassembling and replacing one of the circuit boards.

The utility model discloses a full-bridge converter module without a blocking capacitor. The full-bridge converter module comprises an input filtering unit, a first inversion bridge arm, a second inversion bridge arm, a planar transformer T, a first rectification bridge arm, a second rectification bridge arm, a planar inductor Lf, an output capacitor Co and a square wave detection unit M, the output capacitor Co is connected between the output positive end and the output negative end; a load Rload is connected between the output positive end and the output negative end; according to the full-bridge converter module, a planar magnetic technology is adopted, blocking capacitor configuration is avoided, positive and negative volt-second products are calculated through square wave voltage sampled by a resistance voltage division circuit and driving edge time captured by a comparator circuit, duty ratio control quantity is output, primary side full-bridge driving signal pulse width is dynamically adjusted, and magnetic flux balance control is achieved; the problem that the blocking capacitor occupies a large area is solved, and the high-power density design of the brick power supply module can be realized.

According to one aspect, an electronic device is proposed comprising a support substrate (SUP) and an electronic chip (CHP) assembled to the support substrate (SUP). The support substrate (SUP) includes an electric current sensor (SENS) comprising a planar transformer (TRSF) configured to: - detect a magnetic field (FLD) generated by an electric current to be monitored, and - deliver a voltage induced by this magnetic field in the planar transformer (TRSF) to said electronic chip (CHP). Figure for the abbreviation: Figure 1

This application provides a planar transformer and an active circuit, applied to a telecommunications device and a communications power supply in fields such as a 5G mobile communications technology and cloud computing. The planar transformer includes a winding structure and a magnetic core structure. The winding structure includes a primary-side winding and a secondary-side winding. The magnetic core structure includes a first magnet part, a second magnet part, and a plurality of magnetic cylinders. The plurality of magnetic cylinders are located between the first magnet part and the second magnet part. The primary-side winding is wound around M magnetic cylinders in the plurality of magnetic cylinders, wherein M is a positive integer equal to or greater than three (3). A cross-sectional area of at least one of the M magnetic cylinders is different from a cross-sectional area of another magnetic cylinder.

The utility model discloses a magnetic integrated planar transformer which comprises a plurality of transformers, a resonant capacitor Cr is arranged on the left side of each transformer, three transformer middle columns are engraved and integrated on the same planar magnetic core and share an upper side column and a lower side column, and a PCB winding is arranged on each transformer middle column on the integrated magnetic core. According to the magnetic integrated planar transformer provided by the utility model, a plurality of transformers in a power supply are integrated on the same magnetic core at the same time, and a PCB (Printed Circuit Board) is used for winding, so that the size and the weight of a magnetic piece can be reduced, more space is saved in the power supply for placing other devices, and a solution is provided for improving the power density of a high-power power supply.

A set of two transformers (1) comprising a magnetic core (11) and at least one first and one second printed circuit board (12), each printed circuit board comprising: - at least one layer of electrically insulating material, - at least one first and one second electrically conductive tracks, and - at least one primary winding formed by the first track and at least one secondary winding formed by the second track, each of the windings surrounding at least a part of the magnetic core (11), the magnetic core defining with the first printed circuit board the first transformer, and with the second printed circuit board the second transformer, the magnetic core comprising a first part (111), in particular referred to as I-shaped, and a second part (112), in particular referred to as E-shaped and comprising several branches (1121),all or part of these branches (1121) passing through the first and second printed circuit boards. Abbreviated figure: Figure 1,

A planar transformer including first and second parts of a core with least one of the first and second parts having a center post that resides in an aperture of a PWB. The PWB includes primary windings and secondary windings that surround the center post, are magnetically coupled by the core, and are electrically independent. Separating an uppermost winding from the first part of the core is a first prepreg structure and separating a lowermost winding from the second part of the core is a second prepreg structure. There being no windings disposed between the first and second prepreg structures and the core. This planar transformer structure inhibits the windings from electrically shorting through the core when the planar transformer is subjected to shock or vibration. One variant includes the use of pre-form adhesives sheets located between the solder mask layers of the PWB and the core.

The invention relates to the technical field of reliability of electronic components, and discloses a planar transformer voltage withstanding performance definite reliability modeling and evaluation method, which comprises the following steps: firstly, constructing a constitutive model fusing a physical mechanism, and establishing a time degradation model and a temperature influence model based on the geometric dimension, the material attribute and the environmental stress of an insulating layer; and introducing process capability parameters to characterize manufacturing fluctuations. Secondly, establishing a reliability evaluation model, defining a failure threshold and margin equation, and identifying physical parameters as random variables to quantify uncertainty; then, random variables are sampled through a Monte Carlo algorithm, virtual samples are generated, and the withstand voltage margin is calculated on the evaluation time sequence; and finally, counting the number of samples meeting the safety criterion, calculating instantaneous reliability and generating a full life cycle reliability curve. According to the method, the influence of the manufacturing process, the temperature stress and the time degradation on the pressure resistance is effectively decoupled and quantified, and high-confidence definite reliability evaluation is realized.