28 results about "Magnetic integration" patented technology

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.

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 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.

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 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 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 an integrated magnetic element based on a mixed winding and a design method, belongs to the technical field of power electronics, and aims to solve the problems that an existing planar transformer is large in winding loss, difficult in leakage inductance adjustment and limited in power density due to the fact that an independent resonant inductor needs to be externally connected in a high-frequency and high-turn-number application scene. The integrated magnetic element comprises a magnetic core which is provided with a first side column, a second side column and a middle column, and the three columns are all provided with air gaps; the primary side windings are formed by winding Litz wires and are respectively connected in series with the three columns; and the secondary winding adopts a planar PCB winding and is only wound on the middle column, and the winding direction of the secondary winding is opposite to that of the primary winding. By adjusting the air gap length of each magnetic column and the turn number distribution of the primary winding, the leakage inductance is configured to be a resonant inductance value required by the LLC resonant converter, and the magnetic integration of the transformer and the resonant inductance is realized. The invention further provides a corresponding design method. According to the invention, the Litz wire is combined with the PCB winding, and meanwhile, an external resonant inductor is omitted through magnetic integration.

This invention discloses a three-phase positively coupled inductor for a switched-capacitor converter, relating to the field of inductor technology. Addressing the problem of high inductance loss and difficulty in miniaturization of existing inductors when applied to resonant switched-capacitor converters, this invention includes a printed circuit board (PCB). The PCB contains a magnetic core with a first winding, a second winding, and a third winding running through it. The second winding has the opposite winding direction to the first winding, while the third winding has the same winding direction as the first winding. When connected to the switched-capacitor converter circuit, the current flowing through the second winding is opposite to the current flowing through the first winding, and the current flowing through the third winding is the same as the current flowing through the first winding. This invention achieves magnetic integration through a PCB-embedded three-phase positively coupled structure to reduce the inductor size, while simultaneously increasing the inductance density through the positive coupling effect, resulting in higher inductance and lower inductance loss.

The invention discloses a magnetic integrated transformer, a system and a preparation method, and belongs to the technical field of transformers. The magnetic integrated transformer comprises a first magnetic core which is provided with a first side and a second side which are opposite, and the first side is provided with a first winding; the second side is provided with a second winding; the second magnetic core is arranged on the inner side of the first magnetic core and distributed along the symmetry axis of the first side and the second side, the second magnetic core and the first magnetic core form a magnetic leakage magnetic circuit, the magnetic leakage magnetic circuit is used for generating leakage inductance serving as resonant inductance of the magnetic integrated transformer, and the magnetic leakage magnetic circuit is provided with an adjustable air gap. The second magnetic core and the first magnetic core are matched to form the magnetic leakage magnetic circuit, the leakage inductance generated by the magnetic leakage magnetic circuit is directly used as the resonant inductance required by the resonant topology, an independent resonant inductor does not need to be additionally arranged, a magnetic core and a winding of the independent resonant inductor are omitted in a magnetic integration mode, and the overall size of the transformer can be greatly reduced.

The application discloses a transformer magnetic integration structure integrating double direct-current inductors and leakage inductors and an integration method thereof. In order to overcome the problems of complex magnetic core structure design, large leakage magnetic flux and lack of universality of the integration method in the prior art, the application uses a single standard EE magnetic core to realize integration of double direct-current inductors, leakage inductors and transformers by reasonably designing winding connection mode and air gap parameters for the transformer with three magnetic element structures of direct-current inductor, leakage inductor and transformer. Compared with separate magnetic components, the application can reduce the number of magnetic elements of the transformer, reduce the volume proportion of the magnetic components in the transformer, further reduce the volume of the transformer system, improve the power density, simplify the magnetic core design, reduce the manufacturing complexity of the magnetic integration structure, suppress the unbalanced current of the two side column windings, realize high-efficiency and high-power-density operation of the system, and improve the stability and reliability of the system operation.

The invention discloses an integrated magnetic element based on asymmetry of side columns and a design method thereof, solves the problem of how to reduce the cost and improve the power density of a power supply, and belongs to the technical field of magnetic integration. The magnetic core comprises a first side column, a second side column and a middle column located between the first side column and the second side column, and the first side column and the second side column are asymmetric in structure; the transformer winding is wound on the middle column; the resonant inductor winding comprises a first inductor winding wound on the first side column and a second inductor winding wound on the second side column; air gaps are formed in the first side column, the second side column and the middle column; the magnetic resistance of the first side column, the magnetic resistance of the second side column, the number of turns of the first inductance winding and the number of turns of the second inductance winding are configured to meet the decoupling condition, so that magnetic fluxes generated by the first inductance winding and the second inductance winding on the middle column are mutually counteracted, and magnetic decoupling with the transformer winding is achieved.

The invention relates to the technical field of power electronic conversion, and discloses a three-phase LLC charging module based on magnetic integration, which comprises an input EMI filter circuit, a PFC power factor correction circuit, a three-phase LLC main power circuit, an output anti-reverse connection circuit and a controller. The three-phase LLC main power circuit comprises a primary side switch network, a resonant capacitor network and a three-phase integrated magnetic part; the three-phase integrated magnetic piece adopts a three-column closed magnetic core structure, and a preset leakage inductance value is generated by arranging an insulating interlayer or a gap; the circuit does not contain an independent discrete resonant inductor element, but directly uses the leakage inductance value as a resonant inductor to be matched with a resonant capacitor network to form a resonant circuit. The loss is reduced by using a magnetic flux counteracting principle, and PFM control is performed based on a voltage gain model. The circuit structure is simplified through the magnetic integration technology, high power density and miniaturization are achieved, and meanwhile the active reverse connection prevention and soft start protection functions are achieved.

The invention discloses a bidirectional DC-DC converter and a control method, and the converter employs a magnetic integration technology and a switch multiplexing technology to combine a Boost circuit and a series resonance circuit, and achieves the single-stage bidirectional DC-DC power conversion. Compared with a traditional two-stage converter formed by Boost and series connection, the number of power switch devices is reduced, and the efficiency and the power density of the converter are improved; the low-voltage side adopts the Boost interleaving parallel technology, 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 automobile.

The utility model provides a magnetic integration device and equipment. The device is characterized in that a common magnetic column is arranged between a first bottom plate and a second bottom plate; one end of the first side column is connected with the first bottom plate, the other end is connected with the common magnetic column, one end of the second side column is connected with the first bottom plate, and the other end is connected with the common magnetic column to form a first ring; one end of the third side column is connected with the second bottom plate, the other end is connected with the common magnetic column, one end of the fourth side column is connected with the second bottom plate, and the other end is connected with the common magnetic column to form a second ring; wrapping posts with the same number are distributed in the first ring and the second ring; in the first ring, one end of each wrapping post is connected with the first bottom plate, and the other end of each wrapping post is connected with the common magnetic post; in the second ring, one end of each wrapping post is connected with the second bottom plate, and the other end of each wrapping post is connected with the public magnetic post; and each wrapping post is sleeved with a coil. Through the above mode, two paths of magnetic devices are constructed by using the common magnetic column so as to reduce the power loss, improve the power efficiency and reduce the size.

According to the astronavigation secondary power supply magnetic integration phase-shifted full-bridge circuit, magnetic elements in the circuit are integrated through a magnetic integration technology, and the magnetic elements are integrated into an integrated magnetic part; the circuit comprises a direct-current source Vin, a full-bridge inverter, an integrated magnetic part, a synchronous rectification network and a filter network which are connected in sequence, the integrated magnetic piece comprises two UI type magnetic cores, and the two UI type magnetic cores are arranged at a certain interval. The UI type magnetic core comprises a U-shaped magnet and a bottom plate, and a certain distance is formed between the U-shaped magnet and the bottom plate; the U-shaped magnet comprises two magnetic columns; a primary winding P is wound on the two magnetic columns close to the two UI type magnetic cores, and a secondary winding s1 and a secondary winding s2 are wound on the two magnetic columns close to the two UI type magnetic cores. The two UI-type magnetic cores are used as a transformer and an inductor to operate alternately so as to replace a filter inductor; meanwhile, leakage inductors of the two UI type magnetic cores serve as primary side energy storage inductors to be used for achieving soft switching of a full-bridge circuit. The size and the weight of the circuit are reduced, and the power density is improved.

A magnetic integrated structure includes a magnetic core, a first skeleton, a transformer winding and an inductor winding. The magnetic core includes a magnetic cover, a middle column and an inductor column arranged on the magnetic cover. An air gap is located on the middle column. The first skeleton is arranged on the middle column. The middle column passes through a first hollow part of the first skeleton. In a second direction, the first skeleton includes two first openings arranged oppositely. The transformer winding is at least partially arranged on the first skeleton. The inductor winding is arranged on the inductor column. In a third direction, the heights of the two first openings and the air gap are the same. The two first openings and the air gap form a first heat dissipation channel in the second direction. In a first direction, there is a gap between the transformer winding and the inductor winding. In the second direction, the gap forms a second heat dissipation channel. In the second direction, opposite sides of the magnetic cover are the air inlet and the air outlet of the first heat dissipation channel and the second heat dissipation channel. The present disclosure enhances the heat dissipation capacity of the overall magnetic integrated structure by arranging the first heat dissipation channel and the second heat dissipation channel.