82 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 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 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.

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 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.

The utility model provides a magnetic integrated self-tuning wireless energy transmission device, and relates to the technical field of wireless power transmission. The device comprises a primary side circuit and a secondary side circuit, wherein the primary side circuit is used for converting input direct current into alternating current and transmitting the converted alternating current to the secondary side circuit in the form of energy; the primary side circuit comprises a primary side H-bridge circuit, a primary side resonant capacitor, a transmitting coil, a primary side current transformer, a primary side zero-crossing comparator and a primary side NOT gate; the secondary side circuit is used for sensing the energy from the primary side circuit, converting the generated induction current into direct current and transmitting the direct current to a load; the secondary side circuit comprises a magnetic integrated receiving coil, a secondary side resonant capacitor, a secondary side H-bridge circuit, a secondary side current transformer, a secondary side zero-crossing comparator, a secondary side NOT gate and a direct current capacitor. According to the utility model, the magnetic integration and self-tuning technologies are combined, so that the cost is reduced, and the efficiency and stability of energy transmission are effectively improved.

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 invention discloses a matrix transformer magnetic integration structure applied to an LLC resonant converter, which includes a magnetic core and windings. The magnetic core includes an upper magnetic core cover, a lower magnetic core cover, and a six-column magnetic core therebetween; the windings include a primary winding and a secondary winding; the primary winding and the secondary winding are arranged around the magnetic core columns of the six-column magnetic core to form a transformer: two magnetic columns are provided on the front surface of the six-column magnetic core, and four magnetic columns are provided on the back surface. The primary winding is wound around the front magnetic columns, and the secondary winding is wound around the four back magnetic columns, and an isolation layer is laid between the secondary windings; a air gap with a length of l <subgt;g5< / subgt; is left in the middle of the six-column magnetic core; an air gap with a length of l <subgt;g6< / subgt; is left between the upper magnetic core cover and the magnetic core; an air gap with a length of l <subgt;g1< / subgt; is left between the lower magnetic core cover and the magnetic core. The present invention controls the air gaps l <subgt;g1< / subgt>, l <subgt;g5< / subgt>, l

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.