49 results about "Magnetic integration" patented technology

The invention discloses a magnetic integrated structure suitable for a high-power LLC converter. The structure consists of two groups of magnetic cores which are symmetrically arranged up and down, wherein each group of magnetic cores comprises a U-shaped magnetic core and an I-shaped magnetic core which is matched with the inner side of a side column of the U-shaped magnetic core. The primary winding and the secondary winding of the transformer are both divided into two parts which are wound on the left magnetic core and the right magnetic core respectively, and the winding directions of the secondary winding on the magnetic column are opposite. Decoupling integration of functions of the inductor and the transformer is achieved by distributing the windings. In the design process of the PCB winding, the needed inductance value can be accurately adjusted by adjusting the area of the I-shaped strip-shaped magnetic core, and the inductance value error caused by the fact that the number of turns of the winding is the fraction is effectively avoided. Meanwhile, by changing the air gap of the magnetic core, the sizes of the excitation inductance and the resonance inductance can be flexibly adjusted in equal proportion. In addition, the planar windings are arranged on the two sides of the magnetic core respectively, the window area of the magnetic core is remarkably increased, the number of parallel stacking layers of the PCB windings on a single magnetic column is reduced, and therefore the heat dissipation performance of the transformer is improved.

The invention discloses a three-phase staggered four-switch buck-boost integrated LLC (Logical Link Control) DCDC (Direct Current to Direct Current) isolation converter. The converter comprises a transformer based on magnetic integration design and a primary side circuit and a secondary side circuit which are connected with two sides of the transformer, the primary side circuit comprises a three-phase staggered parallel four-switch boost-buck circuit and a three-phase LLC resonant circuit, and each stage of four-switch boost-buck circuit comprises four switch tubes and a preceding-stage inductor. The front two switch tubes are located between the positive electrode and the negative electrode of the direct-current bus and form a front bridge arm, the rear two switch tubes are located between the middle bus and the negative electrode of the direct-current bus and form a rear bridge arm, and the front-stage inductor is connected between the middle point of the front bridge arm and the middle point of the rear bridge arm. The three ends of the three-phase LLC resonant circuit are correspondingly connected with the midpoints of the three rear axle arms respectively; the resonant capacitors of the LLC circuits are in angular connection, and other circuits of the LLC circuits are in star connection; the secondary side circuit is composed of a three-phase interleaved parallel full-wave rectification circuit. The invention has the advantages of wide input, high efficiency, high power density and high switching frequency.

The embodiment of the present application discloses an isolated power converter. In the embodiment of the present application, the isolated power converter comprises a primary side circuit, a transformer and a secondary side circuit, wherein the secondary side circuit comprises a current conversion circuit and a feedback control circuit, the current conversion circuit excites the secondary side leakage inductance of the secondary side winding via a secondary side switch component in a secondary side switch network to realize current conversion, and the feedback control circuit is configured to control the switching state of the secondary side switch component in the secondary side switch network according to an output feedback signal representing an output signal. Thus, the embodiment can directly adjust the secondary side switch component in the secondary side switch network, so that the secondary side leakage inductance can serve as a power storage element, realize magnetic integration of the transformer, and thus can eliminate the feedback signal path of the primary side and the secondary side, reduce the control complexity and manufacturing cost.

The application discloses a bidirectional DC-DC converter and a control method, the converter adopts a magnetic integration technology and a switching multiplexing technology to combine a Boost circuit and a series resonant circuit, and realizes single-stage bidirectional DC-DC power conversion; compared with a two-stage converter composed of a traditional Boost and series connection, the number of power switching devices is reduced, and the efficiency and power density of the converter are improved; through the Boost interleaved parallel technology on the low-voltage side, the input current ripple is almost zero, the application occasions of the converter are increased, and the converter is particularly suitable for various applications such as a battery energy storage system and a new energy vehicle.

This invention relates to a bipolar self-equalizing DC-DC converter based on magnetic integration and a soft-switching optimization method. It includes two full-bridge circuits, a four-winding transformer, and a voltage-balanced coupling inductor. The first full-bridge circuit outputs two voltages, which are respectively input to the first and second primary windings of the four-winding transformer. One end of the first and second secondary windings of the four-winding transformer is connected to the midpoints of the first and second arms of the second full-bridge circuit, respectively. The other ends of the first and second secondary windings of the four-winding transformer are connected to one end of the primary and secondary windings of the voltage-balanced coupling inductor, respectively. The other ends of the primary and secondary windings of the voltage-balanced coupling inductor are also connected to one end of a first load and one end of a second load. This invention enables all power semiconductor devices to achieve zero-voltage switching characteristics.

This invention discloses a six-phase current-sharing common-mode integrated reactor, belonging to the fields of power electronic magnetic components, electromagnetic interference suppression, and multi-path current-sharing filtering. The reactor includes three winding working columns and two magnetically integrated columns, which are connected to form a closed magnetic circuit. The top of each winding working column has a coil start-up terminal block and a coil end terminal block, while the bottom has a coil middle tap terminal block, with coils wound on all three terminal blocks. The three winding working columns are arranged at intervals, and the two magnetically integrated columns are respectively positioned between adjacent winding working columns, enabling magnetic integration of the three winding magnetic circuits through the magnetically integrated columns. An air gap is provided in each winding working column. This invention utilizes the opposite winding directions of the coils to cancel out the magnetomotive forces. When the current is balanced, it is in an inductive state; when the current is unbalanced, the common-mode inductor functions to force current sharing; the differential-mode inductor is used to filter out noise. This invention achieves six-phase common-mode integration with a single-coil scheme, resulting in small size and low cost.

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.

This invention relates to the field of power electronics and discloses a feedforward arc suppression circuit, control method, and high-voltage power supply. The feedforward arc suppression circuit includes: a resonant cavity current sampling comparator, an input voltage sampling comparator, a first optocoupler, a first resistor, a second resistor, a PI regulation circuit, a second optocoupler, a control chip, and a third resistor. This invention uses a feedforward constant voltage control method, combined with an arc-suppressing resistor connected in series at the main circuit output, to achieve rapid arc suppression. Simultaneously, by sampling the input voltage and using the resonant cavity's feedforward method, it achieves constant output voltage and overcurrent protection, ensuring the overall reliability of the circuit. It achieves complete magnetic integration of the series resonant inductor and parallel resonant capacitor in the LCC converter, effectively improving the converter's power density and reducing its weight.

The invention relates to a magnetic integration-based self-voltage-sharing bipolar direct-current converter with magnetic bias suppression and a method, and the magnetic integration-based self-voltage-sharing bipolar direct-current converter comprises a full-bridge module, a three-winding coupling inductor Tr, a leakage inductor Lk and a bipolar half-bridge module, and one end of a secondary winding of the three-winding coupling inductor Tr is connected with a first input end of the bipolar half-bridge module through the leakage inductor Lk; the other end of the secondary winding of the three-winding coupling inductor Tr is connected with the second input end of the bipolar half-bridge module; the first output end and the second output end of the bipolar half-bridge module are respectively connected with one end of the first load Ro1 and one end of the second load Ro2, and the third output end of the bipolar half-bridge module, the other end of the first load Ro1 and the other end of the second load Ro2 are connected. According to the invention, the voltage sharing of the bipolar output end under the unbalanced load is realized by using one voltage sharing inductor, and the power density is higher.

The utility model provides a multi-mode transformer which is applied to the technical field of power electronics. The multi-mode transformer comprises two magnetic cores, each magnetic core comprises a preset number of magnetic column units, and the magnetic column units of the two magnetic cores are bonded; the preset number is greater than 1; the PCB unit is located between the two magnetic cores, a preset number of first containing areas are formed in the PCB unit, the PCB unit is arranged on any magnetic core, and the opposite magnetic column units in the two magnetic cores are arranged in the same first containing area at the same time. And magnetic integration of a plurality of transformer magnetic cores can be realized. According to the multi-mode transformer, magnetic flux density control in multi-transformer magnetic integration design can be optimized, the magnetic saturation phenomenon is reduced, the heat dissipation performance of the transformer is improved, the complexity of winding layout is simplified, and therefore the overall performance of the transformer is improved, and the service life of the transformer is prolonged.

The invention discloses an astronavigation-used LLC planar magnetic integration method, which comprises the steps of selecting an EE-type magnetic core, designing three magnetic columns, and ensuring uniform magnetic flux distribution due to the fact that air gaps between a middle column and side columns are equal; the resonant inductor and the transformer of the LLC circuit are integrated on the same EE-type magnetic core, so that the functions of the resonant inductor and the transformer can be realized through the same magnetic core; through the design principle that side column magnetic flux counteracts in a middle column, a magnetic flux path is optimized, and magnetic hysteresis loss is reduced; establishing an equivalent magnetic circuit of LLC planar magnetic integration by applying a magnetic circuit Ohm law, calculating a key inductance value, and converting a magnetic circuit model into a circuit equivalent model through a dual theorem; and designing and optimizing the working mode of the LLC circuit according to the established equivalent circuit model so as to ensure high efficiency and high power density. The resonant inductor and the transformer of the LLC circuit are integrated on the same EE-type magnetic core, so that the size of a magnetic element is effectively reduced, the power density of a power supply is improved, the hysteresis loss is reduced, and the overall efficiency is improved.

The invention discloses an integrated magnetic part which is composed of magnetic columns, a top cover and a bottom cover, the top cover and the bottom cover are arranged at the two ends of the magnetic columns, the magnetic columns are two magnetic columns with windings, primary windings and secondary windings are wound on the magnetic columns at the same time, the primary windings of the two magnetic columns with the windings are connected in series, and the two secondary windings used for full-wave rectification are wound on the two magnetic columns respectively. And the two magnetic columns with the windings alternately work between a transformer column state and an inductance column state in a working period through the reversal of each half period of the secondary windings. The integrated magnetic part structure comprises two middle columns which wind a primary side winding and a secondary side winding at the same time, multiplexing of an inductor column and a transformer column can be achieved through time-sharing work of the two middle columns, and then coupling magnetic integration of a transformer and an inductor is achieved.

The invention discloses a wireless coupling energy transfer coil anti-offset system and method based on magnetic integration, the system comprises a primary side compensation circuit, a transmitting coil, a receiving coil Ls and a secondary side compensation circuit which are arranged between a system primary side and a system secondary side, and the primary side compensation circuit comprises a primary side compensation inductor LT, a primary side parallel compensation capacitor CT and a primary side series compensation capacitor Cp; the secondary side compensation circuit comprises a secondary side compensation inductor L2, a secondary side parallel compensation capacitor C2 and a secondary side series compensation capacitor Cs; the transmitting coil comprises an energy transmitting sub-coil Lp arranged on the primary side slip ring and an integrated reverse series coil Lf; and the secondary side compensation inductor L2 and the receiving coil Ls are integrally arranged on the secondary side slip ring. According to the invention, the anti-offset characteristic of the wireless slip ring system is effectively improved in a targeted manner by introducing the transmitting coil which is connected in series reversely and the receiving coil integrated with the resonant inductor into the bilateral LCC topology.

This invention relates to a symmetrical voltage doubler type high-gain DC-DC boost converter, belonging to the technical field of power electronic converters. It solves the problem that traditional symmetrical converters cannot simultaneously achieve simple circuit structure, high boost capability, and electromagnetic interference immunity. This invention combines capacitors, diodes, and coupled inductors in a specific connection method of symmetrical interleaved parallel connection and magnetic integration to form an integrated, miniaturized high-gain conversion unit, balancing structural simplification and performance optimization. This invention is primarily applied in DC power conversion applications with high boost ratios.

The invention discloses a converter based on a symmetric LLC resonant cavity, and relates to the technical field of converters. By adopting a magnetic integration technology, two transformers are integrated according to a matrix integration scheme, then a resonant inductor and the transformers are integrated through a decoupling integration scheme, and a winding structure drawn by a PCB is matched, so that the resonant cavity is formed. A specific magnetic core structure composed of an inductance magnetic core, a cover plate and a transformer magnetic core is designed, coupling of discrete magnetic elements on the physical structure is achieved, on the premise that main functional performance parameters of the symmetric LLC resonant cavity converter are not changed, compared with traditional discrete magnetic elements, the total weight of the magnetic elements is reduced by 26%, and the overall performance of the symmetric LLC resonant cavity converter is improved. The overall loss of magnetic elements is reduced, and the design requirements of light weight and miniaturization of parts of the aviation airborne DC / DC converter under the working conditions of high voltage, medium power and high power are better met.

The present application relates to magnetic coupling resonance type wireless power transmission technology, and particularly to a variable rotation gain magnetic integrated resonance compensation wireless power supply system and method, the system comprising a power transmitting module unit and a power receiving module unit, adopting a magnetic integrated resonance compensation topology structure to realize gain-adjustable external wireless power supply output; the coil design of the compensation inductance magnetic integration to the receiving or transmitting coil is completed, the coupling coefficient of the receiving or transmitting coil and the corresponding integrated compensation coil is reduced, the overall transmission efficiency of the system is improved, and the gain adjustable range is increased; only three capacitors and a magnetic compensation inductance constitute a resonance topology network, the system output gain can be changed without changing the coil parameters, thereby realizing an output customized wireless power supply system, and the three compensation capacitors only need to be changed to adjust the wide range gain, which is more convenient, practical and economical.

The present application provides a single-stage three-port magnetic integrated topology, an on-board charger and a control method thereof, in which the AC side conversion circuit in the single-stage three-port magnetic integrated topology realizes voltage polarity conversion processing for the AC side of the single-stage three-port magnetic integrated topology, and adopts a matrix conversion structure to realize the power factor correction function instead of the additional PFC rectifier circuit in the prior art, and further, the PFC rectifier circuit and the corresponding PFC inductor and the large-capacity electrolytic capacitor between the positive and negative poles of the intermediate busbar in the subsequent stage in the prior art can be omitted, thereby reducing the number of devices and increasing the power density, and the single-stage conversion structure without the PFC rectifier circuit can reduce one stage of power conversion compared with the prior art, further improving the conversion efficiency and simplifying the control scheme. Furthermore, the high-voltage side can be controlled to realize transport voltage clamping through a low impedance design, thereby realizing port power decoupling and reducing the complexity of control.

The application provides a flow-fed bidirectional DC-DC converter based on magnetic integration and double transformers, which comprises a feed inductance, a low-voltage end basic full-bridge circuit, a high-voltage end basic full-bridge circuit, a high-voltage end basic half-bridge circuit and a double transformer, the input end of the low-voltage end basic full-bridge circuit is connected with a low-voltage terminal, the input end of the low-voltage end basic full-bridge circuit and the low-voltage terminal are further connected in series with the feed inductance, the output end of the low-voltage end basic full-bridge circuit is connected with the input end of the double transformer, the output end of the low-voltage end basic full-bridge circuit and the input end of the double transformer are further connected in series with the leakage inductance, the output end of the double transformer is connected with the high-voltage end basic full-bridge circuit and the high-voltage end basic half-bridge circuit respectively, and the high-voltage end basic full-bridge circuit and the high-voltage end basic half-bridge circuit are connected in parallel to a high-voltage terminal. The application has the beneficial effects that the transformer leakage inductance current peak value is controllable, the voltage gain range is expanded, and the soft switching performance in the full load range of the converter is ensured.

According to the method for integrating the magnetic devices in the phase-shifted full bridge + LLC hybrid bridge arm circuit, a phase-shifted full bridge transformer, an LLC transformer and an output filter inductor of the phase-shifted full bridge are integrated into two magnetic devices by adopting a magnetic integration technology, and resonant inductors of the phase-shifted full bridge and an LLC converter are replaced by adjusting an air gap to control a leakage inductance value; each magnetic integrated transformer comprises an E-shaped magnetic core and a magnetic cover, the magnetic cover is arranged on the E-shaped magnetic core, and the E-shaped magnetic core comprises three magnetic columns. According to the invention, the utilization efficiency of the magnetic core is optimized, the power density of the power supply is improved, and a novel solution is provided for realizing an aerospace secondary power supply.

The invention discloses a non-isolated LLC resonant conversion circuit, which belongs to the field of electric energy conversion and comprises a primary side switch module, a resonant module and a secondary side switch module. The input voltage, the primary side switch module, the resonance module, the secondary side switch module and the output voltage are connected in sequence. According to the non-isolated LLC resonant conversion circuit, the secondary winding adopts a star-shaped connection structure, the circuit can achieve most of the advantages of a traditional isolated three-phase LLC, such as realization of a zero-voltage switch, and in addition, through a non-isolated technology, volt seconds and winding current are reduced, the size of a transformer is reduced, and magnetic core loss and winding loss are reduced. And the method can be realized in a transformer magnetic integration mode, the magnetic core material consumption is reduced, and the overall space utilization rate and the magnetic performance stability of the transformer are improved. The transformer does not need to additionally design an insulation structure and a winding interval meeting the isolation requirement, the design of the transformer is further simplified, the size is reduced, and meanwhile magnetic core loss and winding loss are reduced.

The invention relates to a magnetic integration design method for a wireless electric energy transmission system, belongs to the technical field of wireless electric energy transmission, and solves the problems that in the prior art, an extra mutual coupling effect is introduced during magnetic integration design of the wireless electric energy transmission system, and the energy transmission performance of the system is reduced. LCC compensation is adopted as a transmitting compensation network and a receiving compensation network of the wireless power transmission system; a magnetic integrated structure of the wireless power transmission system is determined, a transmitting coil L1 and a receiving coil L2 are rectangular coils and are parallel to each other in direction, a transmitting end compensation inductor Lf1 and a receiving end compensation inductor Lf2 are DD coils and are perpendicular to each other in direction, and a connecting line of centers of two coils in the DD coils serves as the direction of the compensation inductor; and determining parameters of the transmitting end compensation network, the receiving end compensation network, the receiving coil L1 and the receiving coil L2 by adopting finite element simulation based on the design indexes. The coupling effect which is additionally introduced is completely eliminated, and the energy transmission performance of the system is not affected while the power density is improved.

The application discloses a phase-shift full-bridge and LLC hybrid converter magnetic integration planar transformer and system, which comprises a first magnetic core, a second magnetic core, a first magnetic core side column, a first magnetic core middle column, a second magnetic core middle column and a second magnetic core side column; the first magnetic core and the second magnetic core are oppositely arranged, and a primary winding and a secondary winding are sequentially arranged between the first magnetic core and the second magnetic core; the first magnetic core is provided with the first magnetic core middle column, the second magnetic core middle column, the first magnetic core side column and the second magnetic core side column; the first magnetic core middle column and the second magnetic core middle column are arranged between the first magnetic core side column and the second magnetic core side column; through the innovative design of the magnetic integration planar transformer and the strategy of bridge arm reuse, the application not only significantly improves the power density, the magnetic core utilization rate and the overall efficiency of the converter, but also greatly simplifies the system structure and reduces the cost, thereby providing a brand-new solution for realizing a high-performance and miniaturized power conversion system and having wide application prospects and important practical value.

The invention provides a magnetic integrated planar transformer suitable for a sum circuit, and relates to the technical field of electronic power. The magnetic integrated planar transformer suitable for the sum circuit comprises two same magnetic cores, a first-class winding magnetic column, a first-class non-winding magnetic column, a primary winding, a secondary winding and Ts, air gaps are formed in the winding columns and the non-winding columns of the magnetic cores, the non-winding columns are used as leakage magnetic flux paths, the primary winding and the secondary winding Ts are wound on the magnetic cores according to a certain turn number distribution ratio, and the primary winding and the secondary winding Ts are wound on the magnetic cores according to a certain turn number distribution ratio. And the number of turns of the primary winding wound on the column is as follows. Magnetic integration of circuits can be achieved, meanwhile, the transformer and the resonant inductor of the converter are integrated, the size and weight of a power magnetic part are greatly reduced, and the power density of the converter is improved.

The invention discloses a T-type three-level single-stage DAB micro inverter topology based on magnetic integration and a control method, and relates to the technical field of inverters, the topology comprises a photovoltaic input, a power grid output, a symmetrical input capacitor, a primary side bridge arm, a transformer, a secondary side alternating current bridge arm, a symmetrical output capacitor and an output filter inductor; the transformer and the output filter inductor are integrated together through the magnetic integration technology, and the number of independent components is reduced, so that the size is reduced, and the cost is reduced. Meanwhile, the magnetic core loss is effectively reduced by the technology, so that the power density of the system is improved; in control, single-stage power conversion is realized through three-level modulation of a primary side bridge arm and power grid synchronous control of a secondary side bidirectional switching tube. The topology integrates the advantages of a single-stage structure and a multi-stage structure, has the advantages of a single-stage topology and a multi-stage topology at the same time, reduces the voltage stress of a device, and achieves wide-range voltage input.

The invention discloses a voltage converter based on a fractional turn current multiplier, a plurality of power supply modules can work in an interlaced parallel mode, the functions of voltage regulation, inter-phase current sharing, temperature monitoring, phase removal and the like can be achieved in cooperation with a multi-phase digital controller, and the phase removal function is beneficial to improving the light load efficiency. In order to reduce the size of a magnetic core assembly and improve the performance of a converter, an inductance magnetic core is multiplexed as a part of a transformer, and a novel transformer and inductance magnetic integration scheme based on fractional turn current multiplier topology is provided. The invention further provides a single-stage vertical power supply module of the voltage converter based on the fractional turn current multiplier, a four-phase integrated vertical inductor is designed, four-phase output inductors are integrated into a metal powder core, the current density of the voltage regulation module is greatly improved through the vertical structure design, and the structure is compact, so that the overall height of the module is very small.

The invention provides an aerospace secondary power supply LLC magnetic integration structure, and aims to provide a lightweight integration scheme for an aerospace secondary power supply. The primary windings are respectively wound on magnetic columns in the middle and on two sides of the magnetic core so as to generate ideal leakage inductance to replace resonant inductance. A relation exists between leakage inductance and the number of turns Tp1 and Tp2 of the magnetic columns on the two sides, and under the condition that the total equivalent number of turns Tp of the primary side is kept unchanged, when Tp1 and Tp2 change, excitation inductance is almost kept unchanged. And the cost is reduced while the power density of the converter is improved. The transformer comprises a pair of oppositely-arranged three-magnetic-column magnetic cores and a primary winding complex variable winding, and part of the primary winding is wound on magnetic columns on the two sides respectively. The secondary sides are all wound on the middle column; the primary side is connected to the primary side circuit, and the secondary side is connected to the output rectification circuit.

The invention discloses an aviation 270V power converter, and relates to the technical field of power converters, the aviation 270V power converter comprises a heat dissipation component, a power component, a filtering component and a control component, the heat dissipation component, the power component, the filtering component and the control component are mechanically and fixedly connected through support columns and are electrically connected through connectors, and the power component is electrically connected with the control component through connectors. According to the invention, a single-stage isolated LLC full-bridge series resonance topology and an IPOP architecture are adopted, and a DSP28335 digital control platform and a magnetic integration design are combined, so that efficient conversion from 270V direct current to 28V direct current is realized, the rated output is 6kW, the temperature, mechanical and power supply compatibility and electromagnetic compatibility requirements of an airborne environment are met, the power-to-weight ratio, efficiency and reliability of the power converter are remarkably improved, and the power converter has a wide application prospect. And the airborne aviation power supply can be promoted to develop towards the digitization and high power density direction through parallel extension power.

The utility model discloses an LLC magnetic element winding integrated structure which comprises a resonant inductor middle column, a transformer middle column and a PCB winding, the resonant inductor middle column and the transformer middle column are transversely arranged in parallel, the PCB winding surrounds the resonant inductor middle column and the transformer middle column to be integrated together in a routing mode, and the PCB winding surrounds the resonant inductor middle column and the transformer middle column at the same time. A resonant inductor winding and a transformer primary winding can be integrated, so that winding loss and the size of a magnetic element are reduced, and the purpose of improving power density and efficiency is achieved. According to the magnetic integration mainly based on the PCB winding form, when a certain layer of PCB is provided with the resonant inductor and the transformer primary side winding at the same time, the winding modes of the resonant inductor and the transformer primary side winding are not independently carried out any more and are integrated together, so that the winding length is reduced, and the purposes of reducing winding loss and reducing the magnetic core size are achieved.

The invention discloses an integrated magnetic core structure based on a multi-magnetic-column transformer, and relates to the technical field of transformers, the integrated magnetic core structure comprises a magnetic core main body, at least two central magnetic columns are arranged in the middle of the magnetic core main body, the central magnetic columns are used for winding a transformer winding and an inductor winding, and a preset distance is reserved between every two adjacent central magnetic columns; according to the magnetic core, the air-gap-free side columns are additionally arranged on the two sides of the magnetic core, an extra magnetic circuit is provided for magnetic flux, the magnetic flux of the upper magnetic plate and the lower magnetic plate is dispersed, the overall height of the magnetic core is remarkably reduced, and the magnetic core is adaptive to a switching power supply scene with the limited height; the integrated multi-magnetic-column structure enables magnetic flux to uniformly circulate among the central magnetic column, the air-gap-free side columns, the upper magnetic plate and the lower magnetic plate, loss concentration caused by overhigh local magnetic density is avoided, magnetic core loss is effectively reduced, the overall efficiency of the converter is improved, function fusion of a transformer and an inductor is achieved through magnetic integration, and the power density is improved.

The invention discloses a magnetic integration structure of a transformer and an inductor, a design method, a device and a medium, relates to the technical field of magnetic integration, and provides the magnetic integration structure of the transformer and the inductor aiming at the problem that the size is too large after a multi-phase interleaving parallel technology is applied to a current single-phase DAB converter. Magnetic integration of two adjacent phases of corresponding magnetic element units is achieved through the decoupling columns, magnetic circuit parts of two adjacent phases of magnetic elements are shared, repeated magnetic conduction paths are reduced, and therefore the size of the magnetic core is reduced. In addition, due to the existence of the inductor wrapping post, the inductance value of the inductor can be made to be large enough in a small volume space, and the inductor is also suitable for large inductor design. Moreover, the primary side winding and the secondary side winding of each phase transformer of the magnetic integrated structure are wound on the same wrapping post, so that the phenomenon that the working current waveform of the multi-phase DAB converter is abnormal due to large difference between the primary side and the secondary side of the transformer and other inductance coupling conditions is avoided.