Integrated inductor and electronic equipment

Abstract

The utility model provides an integrated inductor and electronic equipment, and belongs to the technical field of filtering. The integrated inductor is used for a three-phase four-wire power grid and comprises a magnetic core, three phase line windings and a middle line winding, and the magnetic core comprises four magnets which are connected end to end, so that the magnetic core is in an annular closed quadrilateral frame shape; the three phase line windings and the middle line winding are wound on at least one magnet and are arranged at intervals in the annular direction of the magnetic core, and the number of turns of any phase line winding is the same as that of turns of the middle line winding; wherein at least two of the three phase line windings and the middle line winding and the magnetic core jointly form a common mode inductor, and any one of the three phase line windings and the middle line winding and the exposed magnets on the two opposite sides of the winding jointly form a differential mode inductor. The integrated inductor can simultaneously realize the functions of a common-mode inductor and a differential-mode inductor.

Description

Technical Field

[0001] The present disclosure relates to the field of filtering technology, and in particular to an integrated inductor and electronic device. Background Art

[0002] In electronic devices such as photovoltaic inverters, it is usually necessary to set common-mode inductors to suppress common-mode interference, and set differential-mode inductors to suppress differential-mode interference.

[0003] Common-mode and differential-mode inductors are typically installed separately in electronic devices. However, this separate design results in the inductors for common-mode and differential-mode suppression occupying a large area on the circuit board, which in turn increases the size of the electronic device. Utility Model Content

[0004] The present disclosure provides an integrated inductor and an electronic device, which are applied to a three-phase four-wire power grid. The integrated inductor can simultaneously realize the functions of a common-mode inductor and a differential-mode inductor.

[0005] In a first aspect, the present disclosure provides an integrated inductor, wherein the integrated inductor is used for a three-phase four-wire power grid, and the integrated inductor includes a magnetic core, three phase windings for connecting to three phase lines of the three-phase four-wire power grid, and a neutral winding for connecting to a neutral line of the three-phase four-wire power grid;

[0006] The magnetic core includes four magnets connected end to end, so that the magnetic core is in the shape of a circumferentially closed quadrilateral frame;

[0007] The number of turns of any one of the phase windings is the same as the number of turns of the neutral winding, the three phase windings and the neutral winding are wound around at least one of the magnets, and the three phase windings and the neutral winding are arranged at intervals along the circumferential direction of the magnetic core;

[0008] In which, at least two of the three phase windings and the neutral winding form a common-mode inductor together with the magnetic core, and any one of the three phase windings and the neutral winding forms a differential-mode inductor together with the exposed magnets on opposite sides of the winding, wherein the exposed magnets are part of the magnets in the magnetic core corresponding to the interval between the winding and the adjacent winding.

[0009] The solution disclosed herein arranges three phase windings and one neutral winding in circumferentially spaced intervals along the magnetic core, so that any one winding and the exposed magnets on opposite sides of the winding can jointly form a differential-mode inductor, and any two windings and the magnetic core can jointly form a common-mode inductor. Thus, the integrated inductor can simultaneously implement the functions of common-mode inductance and differential-mode inductance, equivalent to integrating the common-mode inductance and differential-mode inductance into a single device. Compared to traditional solutions in which common-mode inductance and differential-mode inductance are separately arranged, this reduces the board area occupied by the inductor components used to achieve common-mode and differential-mode suppression on the circuit board, and reduces the cost of the inductor components.

[0010] The solution shown in the present disclosure adopts a rectangular magnetic core in the shape of a quadrilateral frame. Compared with the traditional circular magnetic core, the rectangular magnetic core can provide a larger internal winding cavity while keeping the inductance size basically unchanged, thereby facilitating the winding to pass through the winding cavity and be wound onto the magnet, reducing the difficulty of winding and helping to achieve automated winding.

[0011] In the solution shown in the present disclosure, since the magnetic flux generated by the winding is related to the current flowing through the winding, as well as the wire diameter size and the number of coil turns of the winding, while ensuring the consistency of the wire diameter size, the number of turns of the phase winding and the number of turns of the neutral winding are set to be the same. The magnetic fluxes generated by the phase winding and the neutral winding in response to the power supply current can offset each other, thereby avoiding suppression of the power supply current and affecting the normal operation of the three-phase power supply.

[0012] In a possible implementation, the wire diameter of any one of the phase windings is the same as the wire diameter of the neutral winding.

[0013] In a possible implementation, the three phase windings and the neutral winding are respectively wound on four different magnets; or,

[0014] Any two of the three phase windings and the neutral winding are wound on the same magnet; or

[0015] Any three of the three phase windings and the neutral winding are wound on the same magnet; or

[0016] The three phase windings and the neutral winding are wound on the same magnet.

[0017] In the solution shown in the present disclosure, since the winding in the integrated inductor and the exposed magnets on opposite sides of the winding can jointly form a differential-mode inductor, the size of the exposed magnets will affect the differential-mode inductance. Therefore, the differential-mode inductance can be adjusted by adjusting the layout of the phase winding and the neutral winding on the magnetic core to optimize the filtering effect.

[0018] In a possible implementation, the four magnets include a first magnet and a second magnet that are opposite to each other;

[0019] Any one of the three phase windings and the neutral winding is wound on the first magnet, and the remaining three are wound on the second magnet; or,

[0020] Any two of the three phase windings and the neutral winding are wound around the first magnet, and the remaining two are wound around the second magnet.

[0021] The solution shown in the present disclosure distributes the four windings on two opposite magnets, so that any winding corresponds to a larger exposed magnet size; and compared with the layout method of winding the four windings on different magnets, the user can easily avoid the influence of the size of the magnets on different sides of the magnetic core on the differential mode inductance by controlling the size of the two opposite magnets in the magnetic core to be consistent.

[0022] In a possible implementation, the neutral winding is wound around the first magnet, and the three phase windings are wound around the second magnet.

[0023] The solution shown in the present disclosure sets the neutral winding separately from the three phase windings, which helps users to easily distinguish different neutral windings and phase windings, thereby improving the efficiency of connecting the multiple windings to the three-phase four-wire power grid.

[0024] In a possible implementation, the incoming end and the outgoing end of any one of the three phase windings are located on opposite sides of the magnetic core, and the incoming ends of the three phase windings are located on the same side of the magnetic core.

[0025] The inlet end of the phase winding is an end of the phase winding where the power current flows in, and the outlet end of the phase winding is an end of the phase winding where the power current flows out.

[0026] The solution presented in this disclosure places the power-side terminals of the three phase windings on the same side of the magnetic core, and the core separates the winding's input and output terminals, thereby improving the safety of the integrated inductor. Furthermore, this arrangement allows at least two phase windings wound on the same magnet to adopt the same winding direction, eliminating the need to distinguish the corresponding wiring points on the circuit board for each phase winding's input (or output) terminal when connecting the integrated inductor to a circuit board.

[0027] In one possible implementation, the inlet end of the neutral winding and the inlet ends of each of the three phase windings are located on the same side of the magnetic core, and the outlet end of the neutral winding and the outlet ends of each of the three phase windings are located on the same side of the magnetic core, wherein the inlet end of the neutral winding is the end of the neutral winding into which the power current flows, and the outlet end of the neutral winding is the end of the neutral winding into which the power current flows out; or

[0028] The outgoing end of the neutral winding and the incoming end of each of the three phase windings are located on the same side of the magnetic core, and the incoming end of the neutral winding and the outgoing end of each of the three phase windings are located on the same side of the magnetic core.

[0029] The solution presented in this disclosure arranges the neutral winding's input and output terminals side by side with those of the phase windings, helping to improve wiring efficiency when connecting the integrated inductor to the circuit board. Furthermore, the ends of each winding receiving power supply current are positioned on the same side of the magnetic core, while the ends of each winding receiving power supply current are positioned on the opposite side of the magnetic core, enhancing the safety of the integrated inductor.

[0030] In a possible implementation, the integrated inductor further includes a partition;

[0031] The magnetic core is vertically arranged relative to the partition and connected to the partition.

[0032] In the solution shown in the present disclosure, two opposing magnets in the magnetic core are stacked in a direction perpendicular to the partition, so that the magnetic core can be arranged vertically relative to the partition. In this way, only one frame edge of the quadrilateral frame-shaped magnetic core is set on the partition and the subsequently connected circuit board, which helps to reduce the board area occupied by the integrated inductor on the circuit board, and thus helps to improve the space utilization of electronic equipment.

[0033] In a possible implementation, the partition includes a plate body and at least one limiting protrusion;

[0034] The limiting protrusion is located on a side of the plate body close to the magnetic core, and a side of the limiting protrusion away from the plate body abuts against the magnetic core to separate the magnetic core and the plate body.

[0035] The solution disclosed herein uses a stopper protrusion raised relative to the plate body to lift the magnetic core, creating a gap between the magnet on the side of the core closest to the partition and the partition. This allows the winding wound around the magnet near the partition to pass through this gap and be wound around the magnet. Furthermore, the stopper protrusion, by abutting against the magnet, secures the position of the magnetic core, thereby helping to stabilize the position of the winding wound around the core, preventing the winding from swaying and becoming detached from the circuit board.

[0036] In a possible implementation, the four magnets include a third magnet and a fourth magnet that are opposite to each other, and a stacking direction of the third magnet and the fourth magnet is parallel to the plate;

[0037] The at least one limiting protrusion includes a pair of end protrusions, one of the pair of end protrusions is located between the third magnet and the plate body, and the other is located between the fourth magnet and the plate body.

[0038] In the solution disclosed herein, end protrusions are provided corresponding to the third and fourth magnets, which are stacked in a direction parallel to the plate body. Thus, the pair of end protrusions can lift the magnetic core from two opposite ends. This improves the stability of the magnetic core when the number of limiting protrusions is limited (for example, only two limiting protrusions). In other words, by raising the limiting protrusions at least at two ends of the magnetic core, the number of limiting protrusions provided can be reduced while ensuring the stability of the magnetic core.

[0039] In a possible implementation, the end protrusion has a curved surface on a side away from the plate body;

[0040] The connection between the third magnet and the second magnet, and the connection between the fourth magnet and the second magnet each have a chamfered portion, and each of the chamfered portions is respectively against one of the arc-shaped surfaces. The second magnet is a magnet among the four magnets that is connected between the third magnet and the fourth magnet and is close to the plate.

[0041] The solution shown in the present disclosure is to set the side surface of the end protrusion away from the plate body as an arc-shaped surface. The arc-shaped surface can at least partially surround the chamfered portion in the magnetic core to increase the contact area between the magnetic core and the end protrusion, thereby improving the fixing effect of the end protrusion on the magnetic core.

[0042] In a possible implementation, the at least one limiting protrusion further includes at least one spacing protrusion, and the spacing protrusion is located between the pair of end protrusions;

[0043] Any one of the phase winding and the neutral winding is positioned between the end protrusion and the adjacent spacing protrusion, or is positioned between two adjacent spacing protrusions.

[0044] In the solution shown in the present disclosure, the spacing protrusion can be set in the middle part of the magnet in the magnetic core close to the plate body, so as to limit the winding wound on the magnet. In this way, the limiting protrusion can not only be used to lift and fix the magnetic core, but also to fix the winding to prevent the winding from moving on the magnetic core.

[0045] In a possible implementation, the plate body has a plurality of threading grooves, and the threading grooves penetrate the plate body along the thickness direction of the plate body;

[0046] The wiring terminals of each of the phase winding and the neutral winding correspond to the wire threading slots one by one, and the wiring terminals pass through the wire threading slots, wherein the wiring terminals are the inlet terminals for the power supply current flowing into the windings, or the outlet terminals for the power supply current flowing out of the windings;

[0047] At least one of the limiting protrusions is partially located between two adjacent threading grooves on the same side of the magnetic core to isolate the two adjacent threading grooves.

[0048] The solution shown in the present disclosure can increase the insulation distance between two adjacent wiring terminals inserted into the wire threading slots by extending the limiting protrusion between the two adjacent wire threading slots, thereby improving the safety of the integrated inductor.

[0049] In a possible implementation, a side of the partition close to the magnetic core has a wire accommodating groove, and the wire accommodating groove is used to accommodate a portion of the phase winding and the neutral winding located between the magnetic core and the partition.

[0050] In the solution shown in the present disclosure, when the lifting height of the limiting protrusion may not be sufficient to allow the winding to pass between the magnetic core and the partition, or the number of the limiting protrusions is small, a wire-accommodating groove is opened on the partition to accommodate the winding, thereby increasing the gap between the partition and the magnetic core and assisting in fixing the winding position.

[0051] In a second aspect, an electronic device is provided, comprising the integrated inductor according to the first aspect.

[0052] The electronic device may be, for example, a switching power supply or an inverter. Because the integrated inductor used in the electronic device can simultaneously implement common-mode inductance and differential-mode inductance functions, compared to conventional solutions in which common-mode inductors and differential-mode inductors are separately provided, the board area occupied by the inductor components used to achieve common-mode and differential-mode suppression on the circuit board is reduced, and the cost of the inductor components is reduced, thereby reducing the size of the electronic device and reducing the cost of the electronic device. Furthermore, the integrated inductor core used in the electronic device is arranged vertically relative to the partition, further reducing the board area occupied by the core and improving the space utilization of the electronic device.

[0053] In addition, the integrated inductor used in this electronic device adopts a rectangular magnetic core in the shape of a quadrilateral frame. Compared with the traditional circular magnetic core, the rectangular magnetic core can provide a larger internal winding cavity while the inductor size remains basically unchanged, making it easier for the winding to pass through the winding cavity and be wound onto the magnet, reducing the winding difficulty, helping to achieve automated winding, and thus improving the processing efficiency of electronic equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 A schematic structural diagram of a three-phase four-wire power grid provided by an exemplary embodiment of the present disclosure;

[0055] Figure 2 A first structural schematic diagram of an integrated inductor provided by an exemplary embodiment of the present disclosure;

[0056] Figure 3 A second structural diagram of an integrated inductor provided by an exemplary embodiment of the present disclosure;

[0057] Figure 4 A third structural schematic diagram of an integrated inductor provided by an exemplary embodiment of the present disclosure;

[0058] Figure 5 A fourth structural diagram of an integrated inductor provided by an exemplary embodiment of the present disclosure;

[0059] Figure 6 A fifth structural diagram of an integrated inductor provided by an exemplary embodiment of the present disclosure;

[0060] Figure 7 A sixth structural diagram of an integrated inductor provided by an exemplary embodiment of the present disclosure;

[0061] Figure 8 for Figure 7 Exploded diagram;

[0062] Figure 9 A seventh structural diagram of an integrated inductor provided by an exemplary embodiment of the present disclosure;

[0063] Figure 10 for Figure 9 Exploded diagram;

[0064] Figure 11 for Figure 9 Top view of the center partition.

[0065] Reference numerals

[0066] 1. Magnetic core; 11. First magnet; 12. Second magnet; 13. Third magnet; 14. Fourth magnet; 15. Bare magnet; 16. Winding cavity; 17. Chamfered portion;

[0067] 2. Phase winding; 21. First phase winding; 22. Second phase winding; 23. Third phase winding;

[0068] 3. Neutral winding;

[0069] 4. Partition; 41. Plate body; 411. Wire threading groove; 42. Limiting protrusion; 421. End protrusion; 422. Spacing protrusion; 4211. Arc surface; 43. Wire accommodating groove; 44. Isolation protrusion. DETAILED DESCRIPTION

[0070] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0071] The embodiments of the present disclosure relate to an integrated inductor and an electronic device having the same. The integrated inductor and the electronic device can be applied to a three-phase four-wire power grid and filter the common-mode signals and differential-mode signals in the three-phase four-wire power grid, thereby suppressing common-mode interference and differential-mode interference.

[0072] The following explains the terms involved in the embodiments of the present disclosure.

[0073] Three-phase four-wire power grid: consists of three phase wires (live wires) and one neutral wire (neutral wire). The three phase wires are used to provide three voltages (currents) of equal magnitude, the same frequency, and a phase difference of 120°, as a three-phase AC power supply. When the three phase wires are connected in a star configuration, a wire extending from the connection point is called the neutral wire.

[0074] Common-mode signal: For a pair of input terminals of a system, if the signal polarity and current direction are the same, it is called a common-mode signal.

[0075] Differential mode signal: For a pair of input terminals of a system, if the signal polarity and current direction are opposite, it is called a differential mode signal.

[0076] Common-mode inductor: An inductor used to filter common-mode interference signals.

[0077] Differential mode inductor: an inductor used to filter differential mode interference signals.

[0078] Figure 1 is a structural diagram of a three-phase four-wire power grid provided by an exemplary embodiment of the present disclosure, such as Figure 1 As shown, the three-phase four-wire power grid includes a first phase line L1, a second phase line L2, a third phase line L3 and a neutral line N, wherein a winding is connected to each of the three phase lines and the neutral line. Figures 2 to 5 The four integrated inductors provided in the exemplary embodiments of the present disclosure are as follows: Figures 2 to 5 As shown, the integrated inductor includes a magnetic core 1 and four windings. The windings connected to the phase lines L1, L2, and L3 are called phase windings, and the winding connected to the neutral line N is called the neutral winding. In other words, the integrated inductor includes a magnetic core 1, three phase windings 2, and one neutral winding 3.

[0079] Each winding has an input terminal and an output terminal, wherein the input terminal is the terminal where the power current flows into the winding, and the output terminal is the terminal where the power current flows out of the winding. Figure 1 As shown, the phase winding connected to the first phase line L1 (hereinafter referred to as the "first phase winding 21" for ease of distinction) has its inlet terminal A1 closest to the three-phase power supply, and its outlet terminal A2 closest to the electrical device. Thus, when the first phase winding is connected to the circuit, current flows from the inlet terminal A1 of the first phase winding 21 to the outlet terminal A2. Similarly, for the phase winding connected to the second phase line L2 (hereinafter referred to as the "second phase winding 22"), when connected to the circuit, current flows from the inlet terminal B1 of the second phase winding 22 to the outlet terminal B2. For the phase winding connected to the third phase line L3 (hereinafter referred to as the "third phase winding 23"), when connected to the circuit, current flows from the inlet terminal C1 of the third phase winding 23 to the outlet terminal C2. When the neutral winding 3 is connected to the circuit, current flows from the inlet terminal N1 of the neutral winding 3 to the outlet terminal N2.

[0080] like Figures 2 to 5 As shown, the magnetic core 1 includes four magnets connected end to end, so that the magnetic core 1 is in the shape of a circumferentially closed quadrilateral frame. Exemplarily, the magnetic core 1 includes a first magnet 11, a second magnet 12, a third magnet 13, and a fourth magnet 14, wherein the first magnet 11 and the second magnet 12 are arranged opposite to each other, the third magnet 13 and the fourth magnet 14 are arranged opposite to each other, and the third magnet 13 is connected between the first end of the first magnet 11 and the first end of the second magnet 12, and the fourth magnet 14 is connected between the second end of the first magnet 11 and the second end of the second magnet 12. The first end and the second end are two opposite ends of the magnet.

[0081] Any one of the four magnets can be a straight column or a curved column, such as an arc or a wave, as long as the four magnets can be connected to each other to form a quadrilateral frame.

[0082] like Figures 2 to 5 As shown, the magnetic core 1 has a winding cavity 16, and the three phase windings 2 and the neutral winding 3 mentioned above can partially pass through the winding cavity 16 and be wound on at least one magnet in the magnetic core 1, for example, wound on any one of the first magnet 11, the second magnet 12, the third magnet 13 and the fourth magnet 14, or wound on any two of the above four magnets.

[0083] The three phase windings 2 and the neutral winding 3 are arranged along the circumferential direction of the magnetic core 1 at intervals, so that there is a gap between two adjacent windings, so that part of the magnet in the magnetic core 1 can be exposed without being covered by the three phase windings 2 and the one neutral winding 3. This part of the magnet can be called the exposed magnet. In other words, the exposed magnet 15 is the part of the magnet in the magnetic core 1 corresponding to the interval between the winding and its adjacent winding. At least two of the three phase windings 2 and the neutral winding 3 form a common-mode inductor together with the magnetic core 1, and any one of the three phase windings 2 and the neutral winding 3 can form a differential-mode inductor together with the exposed magnets 15 on opposite sides of the winding. The differential-mode inductor can be used to filter the differential-mode signal.

[0084] For example, Figure 1 and Figure 2 As shown, when a common mode signal is applied to the first phase line L1 and the neutral line N to generate a common mode current, the common mode current flowing through the first phase winding 21 and the neutral line winding 3 can induce the first phase winding 21 and the neutral line winding 3 to generate magnetic flux. The direction of the magnetic flux generated by the first phase winding 21 on the magnetic core 1 is the same as the direction of the magnetic flux generated by the neutral line winding 3 on the magnetic core 1. For example, Figure 2 From the perspective of , the first phase winding 21 and the neutral winding 3 both generate clockwise magnetic flux, so that the magnetic fluxes generated by the first phase winding 21 and the neutral winding 3 reinforce each other, increasing the inductive reactance of the two windings to the common-mode current, so that the common-mode current is further suppressed, thereby achieving the purpose of attenuating the common-mode current and realizing the filtering of the common-mode signal applied to the first phase line L1 and the neutral line N.

[0085] In a three-phase four-wire power grid, a common-mode signal can also be applied to three or four power lines at the same time, for example, simultaneously applied to the first phase line L1, the second phase line L2 and the neutral line N, and the first phase line winding 21, the second phase line winding 22 and the neutral line winding 3 generate the same magnetic flux direction in response to the common-mode signal, so that the first phase line winding 21, the second phase line winding 22 and the neutral line winding 3 can form a common-mode inductance together with the magnetic core 1; or, a common-mode signal is simultaneously applied to the first phase line L1, the second phase line L2 and the third phase line L3, and the first phase line winding 21, the second phase line winding 22 and the third phase line winding 23 respond to the common-mode signal. The magnetic flux direction generated by the common-mode signal is the same, so that the first phase winding 21, the second phase winding 22 and the third phase winding 23 can form a common-mode inductor together with the magnetic core 1; or, the common-mode signal is applied to the first phase line L1, the second phase line L2, the third phase line L3 and the neutral line N at the same time, and the magnetic flux direction generated by the first phase winding 21, the second phase winding 22, the third phase winding 23 and the neutral line winding 3 in response to the common-mode signal is the same, so that the first phase winding 21, the second phase winding 22, the third phase winding 23 and the neutral line winding 3 can form a common-mode inductor together with the magnetic core 1.

[0086] Due to the gap between two adjacent windings, the magnetic flux generated by one winding cannot all pass through the center of the winding and couple to the adjacent winding. Instead, a part of the magnetic flux will leak from the exposed magnet not covered by the winding and form a closed loop through the air. The role of this leakage magnetic flux in the circuit can be equivalent to a series inductive impedance, which can act as a differential mode inductor to attenuate the differential mode current and suppress differential mode interference.

[0087] In a three-phase, four-wire power grid, a differential-mode signal can be applied between at least one of the first, second, and third phase lines L1, L2, and L3, and the neutral line N. The direction of the magnetic flux generated by any phase winding 2 in response to the differential-mode signal is opposite to the direction of the magnetic flux generated by the neutral winding 3 in response to the differential-mode signal. This allows the coupled magnetic flux generated by the phase windings 2 and neutral winding 3 passing through the windings to cancel each other out, thereby preventing the normal operation of the three-phase power supply.

[0088] For example, Figure 1 and Figure 2 As shown, when a differential-mode signal is applied to the first phase line L1 and the neutral line N, resulting in a differential-mode current, when the differential-mode current flows through the first phase line winding 21, the first phase line winding 21 and the exposed magnets 15 on its opposite sides can jointly form a differential-mode inductor to attenuate and filter the differential-mode signal applied to the first phase line L1; at the same time, the neutral line winding 3 and the exposed magnets 15 on its opposite sides can jointly form a differential-mode inductor to attenuate and filter the differential-mode signal applied to the neutral line N. In addition, the magnetic flux directions generated by the first phase line winding 21 and the neutral line winding 3 in response to the differential-mode signal are opposite, for example, Figure 2 From the perspective of , the first phase winding 21 can generate a clockwise magnetic flux, and the neutral winding 3 generates a counterclockwise magnetic flux.

[0089] In a three-phase, four-wire power grid, the current flowing through the neutral line N is equal to the sum of the currents flowing through the first, second, and third phase lines L1, L2, and L3. To prevent the phase windings 2 and neutral winding 3 from affecting the normal operation of the three-phase power supply, the number of turns of any phase winding 2 can be the same as the number of turns of the neutral winding 3. In other words, the first, second, and third phase windings 21, 22, 23 each have the same number of turns, and the number of turns of the phase windings 2 is the same as the number of turns of the neutral winding 3.

[0090] In one example, the wire diameter of any phase winding 2 can be the same as the wire diameter of the neutral winding 3. Since the magnetic flux generated by a winding is related to the current flowing through the winding, as well as the wire diameter and number of turns of the winding, while ensuring the consistency of the wire diameters, the number of turns of the phase winding 2 and the number of turns of the neutral winding 3 are set to be the same. This allows the magnetic fluxes generated by the phase winding 2 and the neutral winding 3 in response to the power supply current to offset each other, thereby avoiding suppression of the power supply current.

[0091] In other examples, the wire diameters of the phase winding 2 and the neutral winding 3 may be different. In this case, the number of turns of the neutral winding 3 may be different from the number of turns of the phase winding 2 .

[0092] When the differential-mode signal frequency is constant, the greater the inductance of the differential-mode inductor, the stronger its ability to filter the differential-mode signal, thereby improving the effect of suppressing differential-mode interference. The integrated inductor provided in the embodiments of the present disclosure can increase the differential-mode inductance and thus improve the filtering effect by adjusting the size of the exposed magnetic body 15, for example, by adjusting the layout of the four windings on the magnetic core 1, or by changing the shape of the magnetic core 1 to increase the distance between two adjacent windings.

[0093] In one example, Figure 2 As shown, the three phase windings 2 and the neutral winding 3 can be wound on four different magnets. For example, the first phase winding 21 can be wound on the first magnet 11, the second phase winding 22 can be wound on the second magnet 12, the third phase winding 23 can be wound on the third magnet 13, and the neutral winding 3 can be wound on the fourth magnet 14. The two windings wound on two opposing magnets (for example, the first phase winding 21 and the second phase winding 22 wound on the first magnet 11 and the second magnet 12, respectively) can be arranged relative to each other or staggered.

[0094] In one example, Figure 3 As shown, any two of the three phase windings 2 and the neutral winding 3 are wound on the same magnet. In specific implementation, the four windings can be wound in pairs on two opposite magnets. For example, any two of the phase windings 2 and the neutral winding 3 (for example, the first phase winding 21 and the neutral winding 3) are wound on the first magnet 11, and the remaining two (for example, the second phase winding 22 and the third phase winding 23) are wound on the second magnet 12. Alternatively, any two of the phase windings 2 and the neutral winding 3 are wound on the same magnet, and the remaining two are respectively wound on two magnets that are different from the magnet and are different from each other. For example, the first phase winding 21 and the neutral winding 3 are wound on the first magnet 11, the second phase winding 22 is wound on the third magnet 13, and the third phase winding 23 is wound on the fourth magnet 14.

[0095] In one example, Figure 4 As shown, any three of the three phase windings 2 and the neutral winding 3 are wound on the same magnet. In a specific implementation, the remaining winding can be wound on a magnet adjacent to the magnet where the three windings are located, or it can be wound on a magnet opposite to the magnet where the three windings are located. For example, any one of the three phase windings 2 and the neutral winding 3 is wound on the first magnet 11, and the remaining three are wound on the second magnet 12 opposite to the first magnet 11. Alternatively, any one of the three phase windings 2 and the neutral winding 3 is wound on the first magnet 11, and the remaining three are wound on the third magnet 13 adjacent to the first magnet 11.

[0096] In one example, the neutral winding 3 can be wound on the first magnet 11, and the three phase windings 2 can be wound on the second magnet 12, so that the neutral winding 3 can be more clearly separated from the phase windings 2, so that the user can connect the multiple windings to the three-phase four-wire power grid.

[0097] In one example, Figure 5 As shown, the three phase windings 2 and the neutral winding 3 are wound on the same magnet. For example, the four windings can be wound side by side on the second magnet 12. The neutral winding 3 can be located on one side of the three phase windings 2 or between any two phase windings 2, which is not limited in the present embodiment.

[0098] In one example, the winding can be wound with any one of bare wire, enameled wire, or film-coated wire, and the winding material can be any one of copper wire, aluminum wire, and copper-clad aluminum wire. In the winding, the cross-sectional shape of the wire can be any one of circular, trapezoidal, and rectangular. In one example, the winding can be wound with flat wire, such as a wire with a trapezoidal or rectangular cross-sectional shape. Compared to round wire, flat wire is conducive to reducing the size of the winding and can make it easier to wind the coil onto the magnetic core 1.

[0099] In one example, the rectangular magnetic core 1 can be made of high-conductivity ferrite, nanocrystal, or other high-conductivity core materials. The magnetic core 1 can be housed in an insulating housing conforming to the core 1, or the outer wall of the magnetic core 1 can be coated with an insulating coating. The housing or coating improves the wear resistance of the magnetic core 1, thereby increasing its service life.

[0100] The integrated inductor provided in the embodiment of the present disclosure adopts a rectangular magnetic core. Compared with the traditional circular magnetic core, the rectangular magnetic core can provide a larger winding cavity 16 while the inductor size remains basically unchanged, thereby facilitating the winding to pass through the winding cavity 16 and be wound onto the magnet, reducing the difficulty of winding and facilitating the realization of automated winding.

[0101] In the integrated inductor provided by the embodiment of the present disclosure, each winding needs to be connected to the corresponding power line through a circuit board, wherein the input and output ends of each winding can serve as the pins of the winding to connect the winding to the circuit board.

[0102] like Figure 6 As shown, the incoming and outgoing terminals of any one of the three phase windings 2 can be located on opposite sides of the magnetic core 1, and the incoming terminals of the three phase windings 2 can be located on the same side of the magnetic core 1. In other words, the incoming terminals of the three phase windings 2 can be located on the first side of the magnetic core 1, and the outgoing terminals of the three phase windings 2 can be located on the second side of the magnetic core 1. The first side and the second side are opposite sides of the magnetic core 1. It is understandable that the first side and the second side can be opposite sides symmetrical about the plane where the magnetic core 1 is located, or they can be opposite sides within the plane where the magnetic core 1 is located. In this way, the connection terminals A1, B1, and C1 of the three phase windings 2 close to the power supply side are arranged on the same side of the magnetic core 1, and the incoming and outgoing terminals of the windings are separated by the magnetic core 1, which can improve the safety of the integrated inductor.

[0103] The first phase winding 21 connected to the first phase line L1, the second phase winding 22 connected to the second phase line L2, and the third phase winding 23 connected to the third phase line L3 need to generate magnetic fluxes in the same direction in response to the common-mode signals applied to the first phase line L1, the second phase line L2, and the third phase line L3. In this case, if the input ends of the three phase windings 2 are set on the same side of the magnetic core, at least two phase windings 2 wound on the same magnet can adopt the same winding direction, so that when the integrated inductor is connected to the circuit board, it is not necessary to distinguish the connection points on the circuit board corresponding to the input ends (or output ends) of each phase winding 2.

[0104] In one example, Figure 6 As shown, the incoming terminals of the three phase windings 2 (i.e., incoming terminal A1 of the first phase winding 21, incoming terminal B1 of the second phase winding 22, and incoming terminal C1 of the third phase winding 23) can be arranged side by side with spacing between them, and the outgoing terminals of the three phase windings 2 (i.e., incoming terminal A2 of the first phase winding 21, incoming terminal B2 of the second phase winding 22, and incoming terminal C2 of the third phase winding 23) can be arranged side by side with spacing between them, and the arrangement direction of the multiple incoming terminals can be parallel to the arrangement direction of the multiple outgoing terminals. In this way, users can connect wires sequentially along the arrangement direction of the incoming terminals (or outgoing terminals), improving wiring efficiency.

[0105] The incoming end of the neutral winding 3 and the incoming end of each of the three phase windings 2 can be located on the same side of the magnetic core 1, and the outgoing end of the neutral winding 3 and the outgoing end of each of the three phase windings 2 can be located on the same side of the magnetic core 1. In this way, by placing the ends of each winding that receive the incoming power current on the same side of the magnetic core 1 and placing the ends of each winding that receive the outgoing power current on the opposite side of the magnetic core 1, the safety of the integrated inductor can be improved.

[0106] like Figure 6 As shown, when the incoming terminal N1 of the neutral winding 3 and the incoming terminal A1, B1, and C1 of the phase winding 2 are arranged side by side and at intervals on the same side of the magnetic core, the first phase winding 21, the second phase winding 22, and the third phase winding 23 wound side by side on the second magnet 12 can be wound in a clockwise direction; the neutral winding 3 wound on the first magnet 11 opposite to the second magnet 12 can be wound in a clockwise direction.

[0107] In other examples, the outlet end of the neutral winding 3 and the inlet end of each of the three phase windings 2 are located on the same side of the magnetic core 1 , and the inlet end of the neutral winding 3 and the outlet end of each of the three phase windings 2 are located on the same side of the magnetic core 1 .

[0108] like Figure 7 As shown, when the outlet terminal N2 of the neutral winding 3 and the inlet terminals A1, B1, and C1 of the phase winding 2 are arranged side by side and at intervals on the same side of the magnetic core, the first phase winding 21 and the second phase winding 22 wound side by side on the second magnet 12 can be wound in a counterclockwise direction; the neutral winding 3 wound on the first magnet 11 opposite to the second magnet 12 is also wound in a clockwise direction, and the third phase winding 23 wound on the second magnet 12 can be wound in a clockwise direction.

[0109] In one example, Figure 6 and Figure 7 As shown, the integrated inductor further includes a partition 4, and the magnetic core 1 is located on one side of the partition 4 and connected to the partition 4. Thus, the partition 4 can provide mounting support for the integrated inductor. The integrated inductor can be first mounted on the partition 4 and then fixed to the circuit board through the partition 4 to improve the mounting stability of the integrated inductor.

[0110] In addition, if Figure 6 and Figure 7 As shown, one of the two opposing magnets of the magnetic core 1 is located on the side of the other magnet away from the partition 4, so that the magnetic core 1 can be arranged vertically relative to the partition 4. The quadrilateral frame-shaped magnetic core 1 has only one frame edge set on the partition 4 and the subsequently connected circuit board, which helps to reduce the board area occupied by the integrated inductor on the circuit board, and thus helps to improve the space utilization of electronic equipment.

[0111] In one example, Figure 6 As shown, the first magnet 11 and the second magnet 12 can be stacked in a direction perpendicular to the partition 4 (or the plate 41 described below), wherein the second magnet 12 is close to the partition 4, and the first magnet 11 is located on the side of the second magnet 12 away from the partition 4. The third magnet 13 and the fourth magnet 14 are stacked in a direction parallel to the partition 4 (or the plate 41), and the extension direction of each of the third magnet 13 and the fourth magnet 14 can be perpendicular to the partition 4 (or the plate 41).

[0112] In order to allow the winding to be wound around the magnet (for example, the second magnet 12) close to the partition 4, there should be a certain gap between the magnet close to the partition 4 and the partition 4 for the winding wound thereon to pass through. Figure 8 and Figure 9 As shown, the partition 4 includes a plate body 41 and at least one limiting protrusion 42; the limiting protrusion 42 is located on the side of the plate body 41 close to the magnetic core 1, and the side of the limiting protrusion 42 away from the plate body 41 abuts against the magnetic core 1 to separate the magnetic core 1 and the plate body 41. The plate body 41 can be a flat plate-shaped member suitable for attaching to a circuit board; the limiting protrusion 42 can be a bump provided on the surface of the plate body 41 facing the magnetic core 1, used to lift the magnetic core 1 relative to the plate body 41.

[0113] In one example, there can be multiple limiting protrusions 42, which are arranged side by side and at intervals along the extension direction of the magnet (for example, the second magnet 12) in the magnetic core 1 that is parallel to and close to the plate body 41. The second magnet 12 can be offset against the multiple limiting protrusions 42 arranged side by side, so that the magnetic core 1 is lifted relative to the plate body 41 by the multiple limiting protrusions 42, thereby improving the fixing stability of the magnetic core 1 and preventing the magnetic core 1 from shaking relative to the partition 4.

[0114] In order to ensure the fixing stability of the magnetic core 1 and reduce the number of the limiting protrusions 42, the limiting protrusions 42 can at least lift the magnetic core 1 relative to the plate 41 from both ends of the magnetic core 1. Figure 8 and Figure 9 As shown, at least one limiting protrusion 42 includes a pair of end protrusions 421, one of the pair of end protrusions 421 is located between the third magnet 13 and the plate body 41, and the other is located between the fourth magnet 14 and the plate body 41, wherein the third magnet 13 and the fourth magnet 14 are two magnets in the quadrilateral frame-shaped magnetic core 1, and the stacking direction is parallel to the plate body 41.

[0115] Further, if Figure 8 As shown, two adjacent magnets can be smoothly connected by chamfering to avoid sharp corners on the outer edge of the magnetic core 1, so that the connection between the third magnet 13 and the second magnet 12, and the connection between the fourth magnet 14 and the second magnet 12 can each have a chamfered portion 17. Figure 8As shown, the second magnet 12 is the magnet among the four magnets connected between the third magnet 13 and the fourth magnet 14 and close to the plate 41 .

[0116] In addition, the connection between the third magnet 13 and the first magnet 11, and the connection between the fourth magnet 14 and the first magnet 11 can also each have a chamfered portion 17. The first magnet 11 is the magnet among the four magnets that is connected between the third magnet 13 and the fourth magnet 14 and away from the plate 41.

[0117] To further improve the fixing stability of the magnetic core 1, the end protrusion 421 has a curved surface 4211 on the side away from the plate 41. Each chamfered portion 17 can abut against one of the curved surfaces 4211.

[0118] like Figure 7 and Figure 8 As shown, the arcuate surface 4211 is located on the surface of the end protrusion 421 close to the magnetic core 1, and the arcuate surface 4211 can be recessed in the direction away from the magnetic core 1 (close to the plate 41). The chamfered portion 17 in the magnetic core 1 can be located within the recessed side of the arcuate surface 4211, so that the arcuate surface 4211 can at least partially surround the chamfered portion 17, thereby increasing the contact area between the magnetic core 1 and the end protrusion 421, thereby increasing the fixing effect of the end protrusion 421 on the magnetic core 1. In one example, one end of the arcuate surface 4211 on one end protrusion 421 facing the other end protrusion 421 (arcuate surface 4211) can be substantially parallel to the plate 41. The arcuate surfaces 4211 on the two end protrusions 421 can be symmetrically arranged, for example, symmetrically arranged about the perpendicular bisector connecting the two end protrusions 421.

[0119] Due to the space limitation of electronic devices, the lifting height of the limiting protrusion 42 may not be enough to allow the winding to pass through between the magnetic core 1 and the partition 4. In this case, Figure 7 and Figure 8 As shown, the partition 4 may have a wire accommodating groove 43 on one side close to the magnetic core 1 , and the wire accommodating groove 43 is used to accommodate the portion of the phase winding 2 and the neutral winding 3 located between the magnetic core 1 and the partition 4 .

[0120] In one example, the wire accommodating groove 43 can be provided in one-to-one correspondence with the winding wound on the magnet (e.g., the second magnet 12) near the partition 4, and the size of the wire accommodating groove 43 can be substantially consistent with the size of the corresponding winding, so that the winding can be constrained in the wire accommodating groove 43. Therefore, the wire accommodating groove 43 can help fix the magnetic core 1 and the winding wound on the magnetic core 1.

[0121] The wire accommodating groove 43 may be a sunken groove formed on the plate body 41 to prevent the winding in the wire accommodating groove 43 from passing through the partition plate 4 and directly contacting the circuit board.

[0122] In other examples, such as Figure 9 As shown, at least one limiting protrusion 42 also includes at least one spacing protrusion 422, and the spacing protrusion 422 is located between a pair of end protrusions 421; any one of the phase winding 2 and the neutral winding 3 is limited between the end protrusion 421 and the adjacent spacing protrusion 422, or is limited between two adjacent spacing protrusions 422, so that the limiting protrusion 42 can be used not only to lift the magnetic core 1, but also to fix the winding to prevent the winding from moving on the magnetic core 1.

[0123] In this case, since there are a large number of limiting protrusions 42 for supporting the magnetic core 1, the two end protrusions 421 corresponding to the third magnet 13 and the fourth magnet 14 in the magnetic core 1 can be provided without arcuate surfaces, and the surfaces of the end protrusions 421 close to the magnetic core 1 can be set to be parallel to the plane of the plate body 41. For example, the shape of the end protrusions 421 can be substantially the same as the shape of the spacing protrusions 422.

[0124] In other examples, there may be only one limiting protrusion 42 , and the limiting protrusion may abut against the middle portion of the second magnet 12 to lift the magnetic core 1 in a balanced manner relative to the plate 41 .

[0125] like Figure 8 and Figure 10 As shown, the plate body 41 has a plurality of wire threading slots 411 that penetrate the plate body 41 along the thickness direction of the plate body 41. The wiring terminals of the phase winding 2 and the neutral winding 3 correspond to the wire threading slots 411 one by one, and the wiring terminals pass through the wire threading slots 411. The wiring terminals are the input terminals for the power supply current flowing into the windings, or the output terminals for the power supply current flowing out of the windings.

[0126] When the spacing between the terminals in the winding is small, especially the spacing between the output terminal N2 of the neutral winding 3 and the input terminals A1, B1, C1 on the same side thereof, or the spacing between the input terminal N1 of the neutral winding 3 and the output terminals A2, B2, C2 on the same side thereof, an isolation structure can be provided on the partition 4 to increase the insulation distance between adjacent input terminals and / or output terminals.

[0127] like Figure 11 As shown, at least one of the limiting protrusions 42 may be partially located between two adjacent threading grooves 411 on the same side of the magnetic core 1 to isolate the two adjacent threading grooves 411 .

[0128] In one example, Figure 11As shown, each limiting protrusion 42 may include a main body and an extension portion. The main body may be used to abut against the magnetic core 1. An extension portion may be provided on opposite sides of the main body, and the paired extension portions may extend along the plane of the plate 41 toward opposite sides of the magnetic core 1 to isolate two adjacent terminals on the first side of the magnetic core 1 and two adjacent terminals on the second side of the magnetic core 1, respectively. The thickness of the extension portion along the extension direction of the second magnet 12 may be less than the thickness of the main body along the extension direction of the second magnet 12.

[0129] When the limiting protrusion 42 includes a pair of end protrusions 421 and a plurality of spaced protrusions 422, the pair of end protrusions 421 can be symmetrically arranged; the shapes of the plurality of spaced protrusions 422 can be consistent. In one example, the shape of the spaced protrusions 422 can be a centrally symmetrical structure.

[0130] In addition, if Figure 8 As shown, the partition 4 may include an isolation protrusion 44. The isolation protrusion 44 may extend between the input terminal N1 of the neutral winding 3 and the output terminal A2 adjacent to the same side thereof to increase the insulation distance between the input terminal N1 and the output terminal A2. The isolation protrusion 44 may serve as one of the limiting protrusions 42 to abut against the magnetic core 1, or the isolation protrusion 44 may be spaced apart from the magnetic core 1.

[0131] An embodiment of the present disclosure further provides an electronic device, which includes the integrated inductor as described above.

[0132] In one example, the electronic device can be an inverter or a switching power supply, such as a differential-mode-common-mode inductor at the output of a photovoltaic inverter, or a common-mode inductor at the input of an inverter. In other examples, the electronic device can be a terminal device such as a mobile phone, tablet computer, desktop computer, laptop computer, or wearable device.

[0133] In the description of the present disclosure, it should be understood that the terms (if any) "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present application.

[0134] Unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" (if any) should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interactions between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0135] In addition, the terms "first" and "second" (if any) are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0136] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0137] In the description of this specification, reference to the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application.

[0138] The above description is merely an embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the principles of the present application shall be included in the scope of protection of the present application.

Claims

1. An integrated inductor, characterized in that: The integrated inductor is used in a three-phase four-wire power grid, and comprises a magnetic core (1), three phase line windings (2) for connecting to three phase lines (L1; L2; L3) of the three-phase four-wire power grid, and a neutral line winding (3) for connecting to a neutral line (N) of the three-phase four-wire power grid; The magnetic core (1) comprises four magnets (11; 12; 13; 14) connected end to end, so that the magnetic core (1) is in the shape of a circularly closed quadrilateral frame; The three phase windings (2) and the neutral winding (3) are wound around at least one of the magnets (11; 12; 13; 14), and the three phase windings (2) and the neutral winding (3) are arranged at intervals along the annular direction of the magnetic core (1); The number of turns of any one of the phase windings (2) is the same as the number of turns of the neutral winding (3), wherein at least two of the three phase windings (2) and the neutral winding (3) together with the magnetic core (1) form a common-mode inductor, and any one of the three phase windings (2) and the neutral winding (3) together with the exposed magnets (15) on opposite sides of the windings form a differential-mode inductor, wherein the exposed magnets (15) are part of the magnets in the magnetic core (1) corresponding to the interval between the winding and the adjacent winding.

2. The integrated inductor according to claim 1, characterized in that: The wire diameter of any one of the phase windings (2) is the same as the wire diameter of the neutral winding (3).

3. The integrated inductor according to claim 1, characterized in that: The three phase windings (2) and the neutral winding (3) are respectively wound on four different magnets; or, Any two of the three phase windings (2) and the neutral winding (3) are wound on the same magnet; or, Any three of the three phase windings (2) and the neutral winding (3) are wound on the same magnet; or, The three phase windings (2) and the neutral winding (3) are wound on the same magnet.

4. The integrated inductor according to claim 3, characterized in that: The four magnets include a first magnet (11) and a second magnet (12) that are opposite to each other; Any one of the three phase windings (2) and the neutral winding (3) is wound around the first magnet (11), and the remaining three are wound around the second magnet (12); or, Any two of the three phase windings (2) and the neutral winding (3) are wound around the first magnet (11), and the remaining two are wound around the second magnet (12).

5. The integrated inductor according to claim 4, characterized in that: The neutral line winding (3) is wound around the first magnet (11), and the three phase line windings (2) are wound around the second magnet (12).

6. The integrated inductor according to claim 1, characterized in that: The inlet end and the outlet end of any one of the three phase windings (2) are respectively located on two opposite sides of the magnetic core (1), and the inlet ends of each of the three phase windings (2) are located on the same side of the magnetic core (1); The inlet end of the phase winding (2) is the end of the phase winding (2) into which the power supply current flows, and the outlet end of the phase winding (2) is the end of the phase winding (2) from which the power supply current flows out.

7. The integrated inductor according to claim 6, characterized in that: The inlet end of the neutral winding (3) and the inlet ends of the three phase windings (2) are located on the same side of the magnetic core (1), and the outlet end of the neutral winding (3) and the outlet ends of the three phase windings (2) are located on the same side of the magnetic core (1), wherein the inlet end of the neutral winding (3) is the end of the neutral winding (3) into which the power supply current flows, and the outlet end of the neutral winding (3) is the end of the neutral winding (3) from which the power supply current flows; or, The outlet end of the neutral line winding (3) and the inlet end of each of the three phase line windings (2) are located on the same side of the magnetic core (1), and the inlet end of the neutral line winding (3) and the outlet end of each of the three phase line windings (2) are located on the same side of the magnetic core (1).

8. The integrated inductor according to any one of claims 1 to 7, characterized in that: The integrated inductor further comprises a partition (4); The magnetic core (1) is arranged vertically relative to the partition (4) and is connected to the partition (4).

9. The integrated inductor according to claim 8, characterized in that: The partition plate (4) comprises a plate body (41) and at least one limiting protrusion (42); The limiting protrusion (42) is located on a side of the plate body (41) close to the magnetic core (1), and a side of the limiting protrusion (42) away from the plate body (41) abuts against the magnetic core (1) to separate the magnetic core (1) and the plate body (41).

10. The integrated inductor according to claim 9, characterized in that: The four magnets include a third magnet (13) and a fourth magnet (14) that are opposite to each other, and the stacking direction of the third magnet (13) and the fourth magnet (14) is parallel to the plate (41); The at least one limiting protrusion (42) comprises a pair of end protrusions (421), one of the pair of end protrusions (421) is located between the third magnet (13) and the plate body (41), and the other is located between the fourth magnet (14) and the plate body (41).

11. The integrated inductor according to claim 10, characterized in that: The end protrusion (421) has a curved surface (4211) on a side away from the plate body (41); The connection between the third magnet (13) and the second magnet (12), and the connection between the fourth magnet (14) and the second magnet (12) respectively have a chamfered portion (17), and each of the chamfered portions (17) is respectively abutted against one of the arc-shaped surfaces (4211). The second magnet (12) is a magnet among the four magnets that is connected between the third magnet (13) and the fourth magnet (14) and is close to the plate (41).

12. The integrated inductor according to claim 10 or 11, characterized in that: The at least one limiting protrusion (42) further comprises at least one spacing protrusion (422), wherein the spacing protrusion (422) is located between a pair of the end protrusions (421); Any one of the three phase windings (2) and the neutral winding (3) is limited between the end protrusion (421) and the adjacent spacing protrusion (422), or is limited between two adjacent spacing protrusions (422).

13. The integrated inductor according to claim 12, characterized in that: The plate body (41) has a plurality of threading grooves (411), and the threading grooves (411) penetrate the plate body (41) along the thickness direction of the plate body (41); The wiring terminals of the phase winding (2) and the neutral winding (3) correspond to the wire threading slot (411) one by one, and the wiring terminals pass through the wire threading slot (411), wherein the wiring terminals are inlet terminals for power supply current flowing into the winding, or outlet terminals for power supply current flowing out of the winding; At least one of the limiting protrusions (42) is partially located between two adjacent threading grooves (411) on the same side of the magnetic core (1) to isolate the two adjacent threading grooves (411).

14. The integrated inductor according to claim 8, characterized in that: The partition (4) has a wire accommodating groove (43) on one side close to the magnetic core (1), and the wire accommodating groove (43) is used to accommodate the portion of the phase winding (2) and the neutral winding (3) located between the magnetic core (1) and the partition (4).

15. An electronic device, characterized in that: The electronic device comprises the integrated inductor according to any one of claims 1-14.

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