245 results about "Planar transformers" patented technology

The invention relates to the technical field of transformers and discloses a high-frequency small planar transformer which comprises a transformer body, the transformer body comprises a lower magnetic core, an upper magnetic core is installed at the top end of the lower magnetic core, and a base plate, a cooling mechanism and a distance adjusting mechanism are arranged on the inner side of the upper magnetic core and the inner side of the lower magnetic core correspondingly. The cooling mechanism is arranged on the transformer body, more excellent heat dissipation and installation functions are achieved, a movable frame and a pull block are driven to move through reset of a first spring, an insertion block is clamped into a positioning groove to form an inverted-L-shaped layout, an upper magnetic core is transversely and longitudinally limited, and the upper magnetic core can be conveniently and rapidly installed. And meanwhile, the substrate is in contact with the cavity network, the internal high-performance fluorinated liquid absorbs heat and is changed from a liquid state to a gas state, enters the condenser through the conveying pipe after phase change, is cooled by the cooling fins to be in a liquid state and then circulates back to the cavity network through the water pump and the conveying pipe, local overheating is avoided, and the heat dissipation efficiency is improved.

A quasi-planar transformer can include a first winding comprising one or more turns of wire, a second winding comprising one or more turns of a conductive trace disposed on a printed circuit board, and a magnetic core positioned with respect to the first and second windings so as to provide a magnetic flux path coupling the first and second windings. The first winding can be a primary winding having a first half wound in a clockwise direction on a first side of the printed circuit board and a second half wound in a counterclockwise direction on a second side of the printed circuit board, wherein the first and second halves are formed of a single continuous wire. The single continuous wire can pass through an opening in the printed circuit board. The first and second halves of the primary winding can be secured to the printed circuit board.

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 invention discloses a fractional-turn winding structure applied to a boost planar transformer and a design method, and relates to a fractional-turn winding structure and a design method. The planar transformer aims to solve the problems that an existing planar transformer is large in stray capacitance and large in work loss. The fractional turn winding structure applied to the boost type planar transformer comprises three winding units, and the three winding units are sequentially arranged between a first magnetic core and a second magnetic core of the boost type planar transformer in an overlapped mode from top to bottom. The invention belongs to the technical field of power conversion.

The invention discloses a winding laminated structure design method and device for optimizing high-frequency copper loss of a planar transformer. The method comprises the steps that 1, parameters of a to-be-optimized planar transformer winding are determined; 2, a lamination combination is arranged for the windings, the number of copper layers corresponding to the windings and the number of turns of the windings in the copper layers are determined, and the copper layers have no sequential relation; 3, the current amplitude and phase of each copper layer in the lamination combination are calculated, the currents of the copper layers are sequentially connected in a vector mode on a complex plane according to an optimal path, a local optimal lamination structure is obtained, and the optimal path judgment basis is that after the current vectors of the copper layers are connected end to end, the sum of squares of the distances from the end points of all the vectors to the original point is minimum; 4, calculating the copper loss of the local optimal laminated structure based on a preset high-frequency copper loss analysis model; step 5, setting different lamination combinations for the windings, and repeating the step 3 and the step 4 until all possible combinations are traversed; and step 6, comparing the local optimal laminated structure copper loss corresponding to all combinations, and selecting the copper loss with the minimum copper loss as the global optimum. According to the method, high-frequency skin and proximity loss can be effectively inhibited, and high-frequency copper loss is reduced.

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.

A laminate transformer includes a multilayer substrate having at least first, second, third, and fourth metal layers. The second metal layer and the third metal layer are separated by a voltage barrier having a thickness. A first multiloop coil has at least a first loop on the first metal layer and at least a second loop on the second metal layer. A second multiloop coil has at least a third loop on the third metal layer and at least a fourth loop on the fourth metal layer. A partial EMI shield for the first multiloop coil is on the second metal layer. A partial EMI shield for the second multiloop coil is on the third metal layer.

The utility model provides a planar transformer. The planar transformer comprises a PCB winding and two magnetic cores. Each magnetic core comprises a magnetic cover, and a transformer magnetic column, an inductance magnetic column and a side column which are arranged on the magnetic cover; the PCB winding is wound on the transformer magnetic column and the inductance magnetic column; the transformer magnetic columns, the inductance magnetic columns and the side columns of the two magnetic cores are oppositely arranged; and the magnetic cover and the side column surround the transformer magnetic column, the inductance magnetic column and the PCB winding. The problems of high height and electromagnetic compatibility of the magnetic integrated device are solved, the height of the magnetic integrated device is reduced, leakage magnetic flux is shielded, and the effect of optimizing electromagnetic compatibility is achieved.

A resonant converter includes a first circuit board, a second circuit board, and a planar transformer. The planar transformer includes an iron core, a plurality of wirings, and a first conductive column. A first core column of the iron core penetrates through a first circuit board through hole of the first circuit board and a second circuit board through hole of the second circuit board respectively. The wirings are formed around the first circuit board through hole and the second circuit board through hole respectively, and the first conductive column electrically connects the wirings to form a winding of the planar transformer. A first via is used to electrically connect the winding and the power component embedded in any one sub-layer board of the first circuit board or the second circuit board, and the iron core is used to sleeve the winding to form the planar transformer.

The invention belongs to the technical field of planar transformers, and relates to a fractional-turn planar transformer of a matrix type integrated structure and a converter. Comprising M magnetic cores and a PCB (printed circuit board), and each magnetic core is provided with a plurality of layers of primary windings and N sections of secondary windings; a circuit structure is arranged between the secondary winding on the first surface and the secondary winding on the second surface, and a source electrode of a synchronous rectifier tube in the circuit structure is connected with a grounding end of an output capacitor; positive potential ends, back to two output capacitors in the circuit structure, on the first surface and the second surface are connected; according to the planar transformer, the advantages of the fractional turn scheme and the matrix scheme of the existing planar transformer are combined, the defects of the fractional turn scheme and the matrix scheme are suppressed, and the requirements of the market for the high-transformation-ratio transformer on the higher server power supply bus voltage are met.

A planar transformer assembly and a power adapter are provided. The planar transformer assembly includes a first printed circuit board (PCB). The first PCB includes a magnetic core, a first primary PCB winding, a first secondary PCB winding and a second secondary PCB winding. The magnetic core passing through the first PCB includes a first cover plate, a second cover plate, and a first magnetic pillar. The first magnetic pillar is connected to the first cover plate. The first magnetic pillar is separated from the second cover plate by a first air gap. The first primary PCB winding is wrapped around a first portion of the first magnetic pillar. The first secondary PCB winding and the second secondary PCB winding are wrapped around a second portion of the first magnetic pillar below the first portion. The second portion is a single portion of the first magnetic pillar.

A power module includes a PCB, a transformer module, and a power converter circuit. The PCB has a top surface and a bottom surface. The transformer module includes a magnetic core, and a primary winding and a secondary winding wound around the magnetic core. The magnetic core has a first core unit arranged on the top surface of the PCB and a second core unit arranged on the bottom surface of the PCB. The primary winding is formed by traces on multiple layers of the PCB, the secondary winding is formed by traces on multiple layers of the PCB, the multiple layers are stacked vertically to form a winding stack. The power converter circuit has power switches, wherein a part of the power switches are disposed on the top surface of the PCB, and another part of the power switches are disposed on the bottom surface of the PCB.

The invention provides a planar transformer temperature rise optimization simulation calculation method, which relates to the technical field of magnetic device simulation design, and mainly comprises the following steps: establishing a planar transformer equal ratio 3D model, solving a planar transformer winding impedance matrix, solving primary and secondary side waveform information of a planar transformer under specified working conditions, and solving the loss of the planar transformer. And solving electromagnetic-thermal bidirectional coupling temperature rise of the planar transformer. According to the method, based on excitation-loss-temperature rise coupling solution, the temperature rise of the planar transformer can be quickly and accurately simulated.

The invention discloses a small-size high-power power supply design method and application based on a planar transformer, and the method comprises the following steps: S1, employing a planar transformer structure comprising at least two layers of PCB windings and a low-loss ferrite magnetic core, enabling the windings to be formed through the etching of PCB copper foils, and enabling the leakage inductance of the adjacent winding layers to be reduced in a staggered stacking manner; s2, the planar transformer is integrated into an LLC resonant half-bridge topology circuit, and soft switching operation of a power supply system under high frequency is achieved by adjusting the primary and secondary turn ratio and resonance parameters of the planar transformer. PCB copper foil etching windings and low-loss ferrite magnetic cores are adopted, leakage inductance is reduced by stacking winding layers in a staggered mode, and the reliability of the power supply system is improved; the planar transformer is combined with laser cutting to precisely control an air gap, so that primary and secondary coupling coefficients are improved to a high coupling state, energy loss is reduced, the size of the transformer is effectively reduced, the planar transformer can be popularized to the fields of industrial power supplies, energy storage systems and the like, and balance of small size and high power is achieved through collaborative optimization of the planar transformer and a topological structure.

A voltage converter circuit includes a plurality of dual active bridges (DABs). Each DAB has a first stage with a plurality of first switches, a second stage with a plurality of second switches, and a transformer having a first winding coupled to a least one of the first switches and a second winding coupled to at least one of the second switches. At least one of the first and second stages of a plurality of the DABs that is a proper subset of the DABs are arranged in parallel with respect to the first winding of the transformer in each of the respective plurality of the DABs, with the parallel first stages of the plurality of the DABs being arranged in series with respect to the first winding of the transformer of at least one other DAB of the DABs, or at least one of the first and second stages of a plurality of the DABs that is a proper subset of the DABs are arranged in series with respect to the second winding of the transformer in each of the respective plurality of the DABs, with the series second stages of the plurality of the DABs being arranged in parallel with respect to the second winding of the transformer of at least one other DAB of the DABs.

The present invention relates to the technical field of planar transformers, and particularly to a planar transformer for a bidirectional inverter charger, which includes a bidirectional inverter charger main body. A planar transformer main body is installed inside the bidirectional inverter charger main body. An adjusting mechanism is rotatably connected to the planar transformer main body. An auxiliary mounting seat is rotatably connected to the adjusting mechanism. An air guide pipe is fixedly connected to the auxiliary mounting seat. A dust-proof mechanism is slidably matched with the auxiliary mounting seat. A drying mesh seat is placed inside the auxiliary mounting seat. A sealing regeneration seat is slidably arranged inside the auxiliary mounting seat. When the planar transformer is used outdoors or in a high-humidity environment, by setting the dust-proof mechanism and placing desiccants in the drying mesh seat, it can prevent dust, moisture or other pollutants from entering the interior of the device, thereby improving the reliability and durability of the device.

A wiring device including a first printed circuit board (PCB) that includes a first direct current (DC) output port and a second DC output port. The wiring device further includes a second PCB electrically connected with the first PCB, the second PCB including a planar transformer integrated with a surface of the second PCB and configured to output power at one or more DC voltage levels, a switch connected to the planar transformer, and a microcontroller. The microcontroller includes an electronic processor and is configured to control delivery of power from the planar transformer to at least one of the first DC output port and the second DC output port using the switch. The switch may have a Gallium Nitride (GaN) chemistry or a Silicon Carbide (SiC) chemistry.

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.

The invention discloses a planar transformer. The planar transformer comprises a magnetic core, a plurality of primary windings and a plurality of secondary windings. The magnetic core is provided with an accommodating groove; the multiple primary windings and the multiple secondary windings are arranged in the containing grooves and are arranged in the height direction of the magnetic core in a spaced mode, one secondary winding is arranged between any two adjacent primary windings, one primary winding is arranged between any two adjacent secondary windings, and the multiple primary windings and the multiple secondary windings are arranged in the height direction of the magnetic core in a spaced mode. The multiple primary windings and the multiple secondary windings are overlapped and abut against each other, the primary windings and the secondary windings are insulated, the multiple primary windings are arranged in parallel, and the multiple secondary windings are arranged in parallel. The space utilization rate of the magnetic core window can be improved, so that the power density of the transformer can be improved.

1. The name of this design product: Planar transformer. 2. Application of this design product: used in various electrical equipment. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

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.

A DAB module includes a planar transformer comprising a first winding, a second winding, and a magnetic core. The first winding can be formed as metallic traces on a first PCB and the second winding can be formed as metallic traces on a second PCB. The magnetic core can be formed around at least a portion of the first and second PCBs. The DAB module also includes first transistors formed on at least one of the first PCBs to form a first stage. The first transistors can be controlled to provide a first current through the first winding based on an input voltage to provide a second current in the second winding. The DAB module further includes second transistors formed on at least one of the second PCBs to form a second stage. The second transistors can be controlled to provide an output voltage based on the second current.

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.