192 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 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 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.

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 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.

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.

Capacitorless solid-state power filter for power converters and electrical power systems. The capacitorless solid-state power filter has a high-frequency planar transformer and a high-frequency power converter. The capacitorless solid-state power filter injects voltage harmonics into the output voltage of a power converter or other source of raw voltage to attain a smoothed output voltage suitable for a given electrical load component. The capacitorless solid-state power filter can be implemented with a DC-DC and / or a DC-AC power converter to provide a smoothed output voltage, such as a flat wave (DC) or a sinusoidal wave (AC). The power converter is capable of generating a smoothed output voltage without relying on capacitors. The capacitorless solid-state power filter may be incorporated into different types of electrical power systems, such as marine systems, aeronautic systems, and / or utility power grids.

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 relates to a planar transformer with improved reliability. A galvanic insulation device includes: an upper coil in a first insulating layer; a lower coil in the second insulating layer; a current insulating region extending between the first insulating layer and the second insulating layer; and a first conductive via. Each of the upper coil and the lower coil includes a turn, a first electrical contact region and a second electrical contact region electrically coupled to the turn. A first conductive via is coupled to the first structural portion of the lower coil (2b), to the turn or to the first or second electrical contact area. The first structural portion includes a first stress dissipation region having a curved shape and not aligned with the upper 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.

An embodiment of the present invention relates to a dual-winding planar transformer and a printed circuit board for the dual-winding planar transformer. The planar transformer includes a first primary winding, a second primary winding, and a secondary winding, which are constructed on four stacked PCB layers, wherein the first primary winding is constructed on the first and second PCB layers, the second primary winding is constructed on the fourth and third PCB layers, and the secondary winding is constructed on the second and third PCB layers. Each PCB layer includes through holes for connecting the primary and secondary windings, and electrical connections between the windings at each level are achieved through access through holes and access through holes on each PCB layer. The planar transformer ensures electrical connection and energy transfer between the windings through a reasonable layout and winding design. The dual-winding planar transformer proposed in the present invention has a simple processing technology, low cost, and is conducive to mass production.

The present disclosure provides a planar transformer, relating to the field of transformer technology. The planar transformer comprises a primary coil and a secondary coil, at least one of which comprises a winding coil. The winding coil is wound around a metal conductor coated with a corona-resistant polyimide fluororesin sintered film. The polyimide fluororesin sintered film is securely fixed to the outer surface of the metal conductor by sintering. Due to the excellent insulation properties of the polyimide fluororesin sintered film and the method of fixing the polyimide fluororesin sintered film, the planar transformer fabricated from the winding coil exhibits excellent insulation performance, good corona resistance, and a long service life.

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 planar transformer comprises windings and a coupling assembly, the windings comprise a first winding and a second winding arranged opposite to the first winding, and the first winding and the second winding are both formed by bending metal foils; the coupling assembly comprises a magnetic core, a coil and an outgoing line, the coil is arranged between the first winding and the second winding, the magnetic core is arranged on the outer side of the first winding and the outer side of the second winding, the windings achieve electromagnetic coupling through the magnetic core and the coil, one end of the outgoing line is connected with the coil, and the other end of the outgoing line is connected with an external circuit. Compared with a traditional planar transformer which uses a flat wire, the winding formed by bending the metal foil has the advantages that the vertical space of the planar transformer is reduced, the situation that wrinkles and damage possibly occur in the winding process of the traditional flat wire is avoided, and the reliability of the planar transformer is improved.

The utility model discloses a planar transformer and a coil structure thereof, the coil structure comprises multiple layers of flexible printed circuit boards, and the multiple layers of flexible printed circuit boards are mutually connected through connecting parts formed by folding. Each layer of flexible printed circuit board comprises a flexible printed circuit board substrate, a first wire printed on a first surface of the flexible printed circuit board substrate and a second wire printed on a second surface of the flexible printed circuit board substrate, and the first wires of the multiple layers of flexible printed circuit boards are the same wire. The second wires of the multi-layer flexible printed circuit board are the same wire, so that interlayer interconnection of the multi-layer flexible printed circuit board can be realized without punching, and the manufacturing process of the coil structure is simplified.