107 results about "Magnetic integration" patented technology

An automotive power system includes an AC / DC power converter, a transformer, a switching bridge connected between the AC / DC power converter and transformer, and a switch bank connected with a secondary side of the transformer. The switch bank connects the secondary side between an electric machine and another switching bridge such that the electric machine, first switching bridge, transformer, and second switching bridge form an isolated DC / DC power converter. The system further includes one or more switches configured to directly connect the traction battery between the AC / DC power converter and second switching bridge.

The invention provides a magnetic integration optimization design method for an LLC resonant converter, and belongs to the technical field of power electronics. The integrated magnetic core structure comprises a magnetic core base with four winding magnetic columns and a top cover plate, and the magnetic integration method reduces the number and the size of magnetic elements and reduces the height of the magnetic elements. According to the magnetic core structure, the magnetic flux density is uniformly distributed, the magnetic core loss of the transformer is reduced, and the power density and efficiency of the transformer are improved. Primary side windings of the transformer are unevenly distributed on the four winding magnetic columns, secondary side windings of the transformer are evenly distributed on the winding magnetic columns, and leakage inductance is only generated on the primary side of the transformer due to the fact that the primary side windings of the transformer are unevenly distributed and the secondary side windings of the transformer are evenly distributed. Therefore, the generated leakage inductance is used as the resonant inductance of the LLC resonant converter, and integration of the transformer and the resonant inductance of the LLC resonant converter is realized. The magnetic integrated transformer with different transformation ratios and controllable leakage inductance can be realized by adjusting the number of turns of windings on the primary side and the secondary side of the transformer and air gaps of winding magnetic columns.

The invention discloses a transformer magnetic integration structure integrating double direct current inductors and leakage inductors and an integration method of the transformer magnetic integration structure. In order to solve the related problems that in an existing magnetic integration method, a magnetic core structure is complex in design and large in leakage magnetic flux, and an integration method lacks universality and the like, a single standard EE magnetic core is used for a common type converter with three magnetic element structures including a direct-current inductor, a leakage inductor and a transformer, the winding connection mode and the air gap parameters are reasonably designed, and the magnetic core structure is optimized. Compared with a discrete magnetic part, the number of magnetic elements of the converter can be reduced, the volume proportion of the magnetic part in the converter can be reduced, the volume of a converter system is further reduced, the power density is improved, the magnetic core design is simplified, and the manufacturing complexity of a magnetic integrated structure is reduced; unbalanced current of column windings on the two sides is suppressed, efficient and high-power-density operation of the system is achieved, and stability and reliability of operation of the system are improved.

The invention discloses a reactor and transformer magnetic integrated transformer, which relates to the technical field of transformers and comprises a frame body, a magnetic core and a winding cluster. The magnetic core is spliced into a square shape by iron-silicon blocks pressed by iron-silicon powder, a first rib frame is arranged on one side of the magnetic core, and a second rib frame is arranged on the other side of the magnetic core. The reactor winding is wound outside the first rib frame, the transformer winding is wound outside the second rib frame, and gaps are reserved between adjacent end faces. The frame body comprises a base, an upper cover plate, a lower retainer and an upper retainer which are connected and fixed through split bolts, so that the structural stability is enhanced; the transformer is made of an iron-silicon material, can work in a frequency range of 50-10KHZ, and realizes low loss and high efficiency. The transformer and the reactor are integrated, and the transformer has multiple functions of voltage transformation, filtering, energy storage, current limiting and the like. The input pins are respectively connected with different power supply systems, stable current can be provided for the load, various load requirements are met, and the circuit has a wide application prospect in the field of power electronics.

The invention provides a partially isolated three-port resonant direct-current converter and a control method thereof, which are applied to a photovoltaic energy storage system, a photovoltaic port is a two-phase interleaved boost circuit, and the first input end of the boost circuit is connected with the output end of a photovoltaic module in the photovoltaic energy storage system; the battery port is a second input end of the two-phase interleaved boost circuit and an input end of the resonance circuit, and is connected with a battery in the photovoltaic energy storage system; the load port is an output end of the resonance circuit and is connected with a load in the photovoltaic energy storage system; the two-phase interlaced boost circuit and the resonant circuit are integrated into a single-stage structure through multiplexing of a switch bridge arm, and magnetic integration is realized through a coupling inductor, so that the number of devices is reduced, and the power density of the device is improved; the maximum power of the photovoltaic module is tracked or charging and discharging of the battery are controlled by adjusting the duty ratio of the first switch bridge arm, the output voltage of the load is controlled by adjusting the duty ratio of the third switch bridge arm, and independent port control and wide voltage gain are achieved under the fixed switch frequency.

The invention belongs to the field of magnetic core loss measurement, and particularly relates to a thin film magnetic core high-frequency loss measurement method. According to the technical scheme, an initial magnetization curve and hysteresis loops under different external magnetic field intensities are measured by using a vibration sample magnetometer (VSM), then a two-winding method measurement platform is built, and high-frequency phase deviation is calibrated by using an air core transformer; after the loss curve of the laminated thin film magnetic core is obtained through calculation, a finite element model containing the thin film magnetic core is established and corrected; and finally, determining the complex permeability of the laminated thin film magnetic core, substituting the complex permeability into the finite element model, eliminating the influence of the air core coupling main magnetic flux on the magnetic induction intensity measurement value in the thin film magnetic core, carrying out iterative updating on the loss curve, and taking the loss curve obtained by the last iterative updating as output. According to the technical scheme, the thin film magnetic core loss suitable for magnetic integration under high frequency can be accurately measured.

The utility model relates to the technical field of magnetic integration, and discloses a magnetic integrated inductor and electronic equipment, the magnetic integrated inductor comprises an upper top plate, a lower bottom plate, a left side column, a right side column, N wrapping posts, N coils and N-1 middle columns, N is a natural number greater than or equal to 2; the left side column, the N-1 middle columns and the right side column are sequentially arranged between the upper top plate and the lower bottom plate. One wrapping post is arranged between the left side post and the adjacent middle post, one wrapping post is arranged between the right side post and the adjacent middle post, and one wrapping post is arranged between every two adjacent middle posts; and one coil is correspondingly wound on one winding post. By means of the special structural design, the overall size, weight and loss of the inductor can be further reduced, a better electromagnetic compatibility effect is further obtained, high power density is achieved, the performance of the inductor is improved, and application and popularization of the inductor are facilitated.

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 utility model discloses a magnetic integrated wireless charging system for a support frame of an electric bicycle, and relates to the technical field of high-frequency energy utilization and magnetic integrated wireless energy transmitting and receiving. The system comprises a ground magnetic integration type wireless energy transmitting module and an electric bicycle magnetic integration type wireless energy receiving module, the ground magnetic integration type wireless energy transmitting module comprises a transmitting end magnetic integration type magnetic coupling mechanism, and an E-shaped magnetic core is adopted; according to the magnetic integrated wireless energy receiving module of the electric bicycle, the I-shaped magnetic core is adopted, the transmission efficiency is improved by increasing the transmissible area, and the manufacturing cost is reduced while the required effect is achieved through the combination of the I-shaped magnetic core and the E-shaped magnetic core. Compared with existing wired charging, potential safety hazards caused by plugging and unplugging and exposing of an electrified assembly are eliminated.

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 invention relates to the technical field of heating systems, and particularly discloses a heating system adopting a photovoltaic direct drive and mains supply coupled double-source heating technology, comprising a photovoltaic direct drive module which is composed of a photovoltaic array and a high-frequency isolation type direct drive converter, the direct drive converter adopts a three-level ANPC topological structure, and a deep learning-based MPPT algorithm is built in the direct drive converter; the commercial power coupling module is used for connecting commercial power with photovoltaic direct drive output in parallel through a bidirectional coupler based on a magnetic integration technology; the intelligent energy management unit comprises a sensor group and a coupling controller, and the sensor group collects photovoltaic array output power, mains supply voltage, heating load requirements and environment temperature signals in real time; and the waste energy recovery module is connected with the photovoltaic direct drive module and the heating terminal in parallel, comprises an excess electric energy recovery unit and is composed of a DC-DC converter and a phase change heat storage device, photovoltaic power generation, mains supply complementation and energy recovery technologies are combined, and efficient and intelligent clean energy heating is achieved.

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 invention relates to the technical field of power electronics, in particular to an input and output common-ground interleaving magnetic integration three-level bidirectional converter. Comprising eight switching tubes, a pair of coupling inductors L1 and L2, flying capacitors Cf1 and Cf2, switching tubes S11, S12, S13 and S14 are sequentially connected in series to form a three-level bridge arm B1, switching tubes S21, S22, S23 and S24 are sequentially connected in series to form a three-level bridge arm B2, the flying capacitor Cf1 is connected with the bridge arm B1 in parallel, and the flying capacitor Cf2 is connected with the bridge arm B2 in parallel; one end of the inductor L1 is connected between the switching tubes S12 and S13, and the other end of the inductor L1 is connected to the positive electrode of the low-voltage side; one end of the inductor L2 is connected between the switch tubes S22 and S23, and the other end of the inductor L2 is connected to the positive electrode of the low-voltage side. The voltage stress of the switching tube is half of that of a high-voltage side, and the equivalent switching frequency is one time of that of the switching tube. And the interleaving parallel structure greatly reduces the current ripples on the low-voltage side.

The invention provides a magnetic integration device and electronic equipment, the magnetic integration device at least comprises a main circuit board and two paths of power conversion groups, the two paths of power conversion groups are arranged side by side, and any power conversion group comprises a first circuit board, a second circuit board and a magnetic integration module; wherein the first circuit board and the second circuit board are arranged on the main circuit board in a spaced mode in the first direction, and the magnetic integration module is fixed to the main circuit board through the first circuit board and the second circuit board; and the magnetic integration module is connected with devices on the first circuit board and the second circuit board. By means of the mode, the magnetic integration module and the circuit board are integrally arranged to optimize the size, and by means of the interval arrangement mode, an air channel is optimized, heat dissipation is improved, and the efficiency of the device is improved.

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.

The single-phase two-in-one magnetic integrated BOOST boost inductor comprises a combined magnetic core, the combined magnetic core is provided with a cross beam magnetic core, upper jaw magnetic cores are arranged on the left side and the right side of the upper end of the cross beam magnetic core, and lower jaw magnetic cores are arranged on the left side and the right side of the lower end of the cross beam magnetic core. A middle column magnetic core is arranged between the upper jaw magnetic core and the lower jaw magnetic core on the left side of the cross beam magnetic core, a middle column magnetic core is arranged between the upper jaw magnetic core and the lower jaw magnetic core on the right side of the cross beam magnetic core, and the combined magnetic core is of a structure with two square-shaped magnetic cores in mirror symmetry. Inductive windings are symmetrically wound on the two sides of the combined magnetic core, the inductive windings are wound on the middle column magnetic cores on the corresponding sides, and isolation plates are arranged between the inductive windings and the upper jaw magnetic core and between the inductive windings and the lower jaw magnetic core. The cross beam magnetic core, the upper jaw magnetic core, the lower jaw magnetic core and the center pillar magnetic core are made of ferrite power materials. According to the utility model, the problem of unstable product quality caused by high difficulty in production and assembly because the combination of a magnetic powder core and a ferrite or an amorphous block is mostly adopted in a magnetic integration scheme is solved.

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 discloses an LLC magnetic integrated transformer, and relates to the technical field of LLC magnetic integrated transformers. The LLC magnetic integration transformer comprises an inductor magnetic core and a transformer magnetic core, the inductor magnetic core and the transformer magnetic core are both arranged to be in a U shape, and the surfaces of the sides, close to the transformer magnetic core, of the inductor magnetic core are fixedly connected with a first connecting protrusion and a second connecting protrusion correspondingly; the first protruding column and the second protruding column are fixedly connected to the surface of the side, close to the transformer magnetic core, of the inductor magnetic core, the primary coil and the secondary coil can be wound internally and externally separately, the inner side and the outer side are isolated and separated, and therefore the electrical safety distance is increased, the influence of leakage magnetic flux is reduced, and the efficiency of the transformer can be improved; meanwhile, the insulation performance between the coils can be improved, the turn ratio of the primary coil to the secondary coil can be adjusted according to the design requirement to adapt to different voltage conversion requirements, the mutual inductance effect between the primary coil and the secondary coil is reduced, and therefore energy loss is reduced.

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 present invention discloses a two-phase interleaved flying capacitor bidirectional DC converter based on coupled inductors, which relates to the field of power electronics technology. The DC converter is two-phase interleaved and parallel-connected, and the inductors between the two phases are magnetically coupled. It includes four groups of bridge arms, four flying capacitors, a pair of coupled inductors, and two filter capacitors. Among them, the coupled inductors are reversely coupled. Each group of bridge arms is composed of four power switches connected in series, with a total of sixteen power switches. The characteristics of the present invention are that it can perform bidirectional step-up and step-down. The voltage stress of each power switch is half of the voltage bus. Interleaved parallel connection can reduce the ripple of the output current while increasing the conversion efficiency of the converter. The magnetic integration technology further reduces the inductance and the volume of the converter, reduces the phase current ripple of each phase inductor, and improves the dynamic performance of the converter at the same time. It has good application and development prospects for the energy storage link of new energy distributed power generation systems such as light and wind.

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 utility model discloses a magnetic integrated structure, a composite sensor and power supply equipment. The magnetic integration structure comprises a primary side of the current transformer, a magnetic core assembly and an electromagnetic wire, the primary side of the current transformer is arranged in the magnetic core assembly in a penetrating mode, the electromagnetic wire is wound around the magnetic core assembly to form a resonant inductor, and the electromagnetic wire is further wound around the primary side of the current transformer to form a primary side winding of the current transformer. According to the scheme, the characteristic that the inductors and the primary side of the current transformer are connected in series is ingeniously utilized, the winding outgoing line of the inductors serves as the input of the current transformer, a primary side coil of the current transformer is saved, and meanwhile the situation that at least six electrical connection points (two inductors, two primary sides of the current transformer and two secondary sides of the current transformer) are needed for traditional inductive current sampling series connection of the current transformer is changed; and the number of the inductors is effectively reduced to four (one inductor, one current transformer primary side and two current transformer secondary sides), so that the production and process cost is reduced.

The invention discloses a magnetic integrated transformation device and a charger, the magnetic integrated transformation device comprises a magnetic core and windings wound on the magnetic core, the windings comprise a first winding, a second winding and a third winding, the first winding is divided into a first winding group a and a first winding group b, the first winding group a and the first winding group b are distributed at two sides of the second winding, and the third winding is distributed at two sides of the second winding. The second winding and the third winding are mutually laminated; magnetic leakage inductors are led out from the head and tail ends of the first winding; according to the invention, the integration of the OBC for charging the high-voltage battery and the LDC for charging the low-voltage battery is realized, the power inductance of the OBC is integrated through the leakage inductance of the transformer, the volume and weight of the magnetic element of the charger are effectively reduced, the charging and inversion functions of the charger are not influenced by the magnetic integrated transformation device provided by the invention, and the cost is reduced. The high-voltage battery and the low-voltage battery can be charged at the same time, and the power density of the charger is improved; the method provided by the invention has universality for OBC topologies with power inductors, such as a dual-active bridge converter and a resonant converter.

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.