Interleaved parallel inverter inductor

Abstract

The invention discloses an interleaved parallel inversion inductor which comprises a bottom plate, three magnet yokes, a plurality of magnetic core columns and four coils, the three magnet yokes are sequentially arranged at equal intervals in the preset direction, and every two adjacent magnet yokes are arranged in parallel; the plurality of magnetic core columns are respectively arranged between two adjacent magnet yokes; the four coils are respectively wound on the side surfaces of the plurality of magnetic core columns corresponding to the four magnetic circuits in a matched manner; the bottom plate is arranged on the bottom side of the three magnet yokes; the four coils are combined in pairs to form two coil groups, the two coil groups extend along the arrangement direction of the three magnet yokes, the two coils of the same coil group are accommodated between the two adjacent magnet yokes, the two coils of the same coil group are respectively and correspondingly wound on the side surfaces of the plurality of magnetic core columns corresponding to the two adjacent magnetic circuits, and the two coils of the same coil group are connected in series. According to the interleaved parallel inverter inductor, leakage inductance can be effectively reduced, the energy transmission density is improved, and meanwhile the redundancy and reliability of the inductor are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of inductors, and in particular to an interleaved parallel inverter inductor. Background Art

[0002] Interleaved parallel inverter inductors are key components in power electronics systems, particularly in multiphase inverters or interleaved parallel DC-AC / DC-DC topologies. Their design significantly improves system efficiency, power density, and dynamic performance through time-interleaved control of the multiphase inductors and coordinated magnetic circuit design. Interleaved parallel inverter inductors typically consist of multiple independent inductors (e.g., two-phase or three-phase), each corresponding to a branch of the inverter (e.g., a two-phase interleaved parallel buck inverter). By integrating the multiphase inductors into a single core (e.g., a three- or four-leg core), the shared magnetic circuit reduces size and losses. For example, a two-phase interleaved inductor can be integrated into an E-shaped three-leg core, with independent windings on each leg and a shared magnetic circuit in the middle leg. Through time-interleaved control and coordinated magnetic circuit design, interleaved parallel inverter inductors achieve current ripple reduction, improved core utilization, and system miniaturization, making them a core technology for modern, high-efficiency power electronics systems. The deep synergy between its structural characteristics and working principles provides key support for high power density and high reliability applications.

[0003] However, the energy transmission density and integration of existing staggered parallel inverter inductors are insufficient and have room for improvement. Summary of the Invention

[0004] Based on this, it is necessary to provide an interleaved parallel inverter inductor to address the problems of insufficient energy transmission density and integration of existing interleaved parallel inverter inductors.

[0005] A staggered parallel inverter inductor comprises a base plate, three magnetic yokes, a plurality of magnetic core columns, and four coils. The three magnetic yokes are arranged in sequence and at equal intervals along a preset direction, and two adjacent magnetic yokes are arranged parallel to each other, thereby forming a storage space for the magnetic core columns and the coils. The plurality of magnetic core columns are respectively arranged between two adjacent magnetic yokes to form two parallel magnetic circuits, which are combined with the two magnetic yokes to form a complete magnetic circuit, that is, the three magnetic yokes are combined with the plurality of magnetic core columns to form four magnetic circuits. Based on this, the four coils are respectively wound around the side surfaces of the plurality of magnetic core columns corresponding to the four magnetic circuits, thereby forming the main functional structure of the staggered parallel inverter inductor. The base plate is arranged on the bottom side of the three magnetic yokes, and one side surface of the base plate is in contact with the bottom side surface of the three magnetic yokes, thereby stably supporting the three magnetic yokes, the plurality of magnetic core columns, and the four coils.

[0006] The four coils are combined in pairs to form two coil groups. The two coil groups are extended along the arrangement direction of the three magnetic yokes. The two coils in the same coil group are accommodated between two adjacent magnetic yokes. In addition, the two coils in the same coil group are respectively wound around the side surfaces of several magnetic core columns corresponding to two adjacent magnetic circuits, and the two coils in the same coil group are connected in series.

[0007] In one embodiment, each of the magnetic core columns is configured as a columnar structure. In one embodiment, each of the magnetic core columns is configured as a main body extending uniformly along a direction, and both ends of the magnetic core column are configured as flat end surfaces.

[0008] In one embodiment, a plurality of magnetic core bodies between two adjacent magnetic yokes are stacked and extended to form a magnetic circuit of a preset length.

[0009] In one embodiment, each of the magnetic circuits is formed by stacking four magnetic cores.

[0010] In one embodiment, the staggered parallel inverter inductor further includes a plurality of air gaps, which are respectively disposed between two adjacent magnetic core columns and between the magnetic core column and the magnetic yoke. That is, each air gap is disposed at the end surface of the corresponding magnetic core column.

[0011] In one embodiment, the air gap sheet is configured as a ring-shaped plate structure with a central portion passing through the end surface of the magnetic core column.

[0012] In one embodiment, the staggered parallel inverter inductor further includes a plurality of insulating papers, each insulating paper being coated on the corresponding side surfaces of a plurality of continuously arranged magnetic core columns.

[0013] In one embodiment, the side surface of each insulating paper corresponding to the magnetic core column is configured as a hollow cylindrical structure.

[0014] In one embodiment, the staggered parallel inverter inductor further includes a plurality of partitions, and the plurality of partitions are respectively disposed on the facing side surfaces of adjacent magnetic yokes.

[0015] In one embodiment, each of the above-mentioned partitions is provided with an avoidance groove, which is provided in the center of the partition and passes through both sides of the partition.

[0016] In one embodiment, the avoidance groove corresponds to the end surface of the magnetic core column.

[0017] In one embodiment, the base plate is provided with a plurality of pads, which are arranged equidistantly on the base plate surface corresponding to the bottom ends of the three yokes. When the yoke is mounted on the base plate, each pad abuts against the bottom end of the corresponding yoke.

[0018] In one embodiment, the above-mentioned base plate is also provided with a plurality of wire outlet holes, which pass through both sides of the base plate. When four coils are installed on the base plate, the two lead ends of each group of two coils connected in series extend to the other side of the base plate through the corresponding wire outlet holes.

[0019] The above-mentioned staggered parallel inverter inductor is connected in series through two coils of the same coil group to form a two-phase magnetic integrated inductor structure, and the two coil groups are set in parallel in actual application, so that the two coils in series of the same phase realize close coupling of the magnetic circuit through the corresponding two adjacent magnetic yokes and several magnetic core columns. The two coils are connected in series to effectively improve the equivalent inductance value; and the parallel connection between the two-phase four coils can share the load current and effectively reduce the single-phase current stress. Combined with the above-mentioned series-parallel structure, the staggered parallel inverter inductor of the present invention can effectively reduce leakage inductance and improve energy transfer density, while improving the redundancy and reliability of the inductor; through the magnetic integration between the coils, the volume of the magnetic core can be effectively reduced, and the structural compactness of the inductor can be improved. By parallel shunting, the copper loss is reduced and the control bandwidth is equivalently improved, which accelerates the load transient response, so that the staggered parallel inverter inductor of the present invention is effectively improved in efficiency, power density and anti-interference ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the structure of staggered parallel inverter inductors in one embodiment; Figure 2 Schematic diagram of the exploded structure of staggered parallel inverter inductors in one embodiment. DETAILED DESCRIPTION

[0021] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0022] In the description of the present invention, it should be understood that the terms "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 to 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 invention and simplifying the description, rather than indicating or implying 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 limiting the present invention.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0024] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0025] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0026] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0027] See also Figures 1 to 2The present invention discloses a staggered parallel inverter inductor 10, which includes a base plate 100, three magnetic yokes 200, a plurality of magnetic cores 300 and four coils 400. The three magnetic yokes 200 are arranged in sequence and equidistantly along a preset direction, and two adjacent magnetic yokes 200 are arranged parallel to each other, thereby forming a receiving space for the magnetic cores 300 and the coils 400; the plurality of magnetic cores 300 are respectively arranged between two adjacent magnetic yokes 200 to form two parallel magnetic paths, thereby combining the two magnetic yokes 200. 00 forms a complete magnetic circuit, that is, the three magnetic yokes 200 are combined with the plurality of magnetic core columns 300 to form four magnetic circuits; based on this, the four coils 400 are respectively corresponding to the four magnetic circuits and are wound on the side surfaces of the plurality of magnetic core columns 300, thereby forming the main functional structure of the staggered parallel inverter inductor 10; the bottom plate 100 is arranged on the bottom side of the three magnetic yokes 200, and one side surface of the bottom plate 100 is in contact with the bottom side surface of the three magnetic yokes 200, thereby stably supporting the three magnetic yokes 200, the plurality of magnetic core columns 300 and the four coils 400. Specifically, the four coils 400 are combined in pairs to form two groups of coils 400. The two groups of coils 400 extend along the arrangement direction of the three magnetic yokes 200. The two coils 400 of the same coil group 400 are accommodated between two adjacent magnetic yokes 200. In addition, the two coils 400 of the same coil group 400 are respectively wound on the side surfaces of several magnetic core columns 300 corresponding to two adjacent magnetic circuits. Furthermore, the two coils 400 of the same coil group 400 are connected in series to form a two-phase magnetic integrated inductor structure. Based on the above structure, the two groups of coils 400 are arranged in parallel in actual applications. Therefore, the two coils 400 connected in series in the same phase achieve close coupling of the magnetic circuit through the corresponding two adjacent magnetic yokes 200 and several magnetic core columns 300. The series connection of the two coils 400 can effectively improve the equivalent inductance value; and the parallel connection between the two-phase four coils 400 can share the load current, effectively reducing the single-phase current stress. Combined with the above-mentioned series-parallel structure, the staggered parallel inverter inductor 10 of the present invention can effectively reduce leakage inductance and improve energy transfer density, while improving the redundancy and reliability of the inductor; through the magnetic integration between the coils 400, the volume of the magnetic core can be effectively reduced, the structural compactness of the inductor can be improved, and the copper loss can be reduced and the control bandwidth can be equivalently improved through parallel shunting, thereby accelerating the load transient response, so that the staggered parallel inverter inductor 10 of the present invention is effectively improved in efficiency, power density and anti-interference ability.

[0028] Furthermore, each magnetic core leg 300 is configured as a columnar structure. In one embodiment, specifically, each magnetic core leg 300 is configured as a main body extending uniformly in one direction, and both ends of the magnetic core leg 300 are configured as flat end surfaces. Based on this, the main bodies of several magnetic core legs 300 are stacked and extended between two adjacent magnetic yokes 200 to form a magnetic circuit of a predetermined length. In one embodiment, specifically, each magnetic circuit is formed by stacking four magnetic core legs 300.

[0029] Furthermore, the staggered parallel inverter inductor 10 includes a plurality of air gaps 500, which are disposed between two adjacent magnetic core legs 300 and between a magnetic core leg 300 and a magnetic yoke 200. In other words, each air gap 500 is disposed at the end face of a corresponding magnetic core leg 300 to ensure that an air gap of a predetermined width is reserved between the magnetic yoke 200 and the magnetic core leg 300, and between the magnetic core legs 300. In one embodiment, the air gaps 500 are disposed at the end faces of the corresponding magnetic core legs 300 in the form of an annular plate structure with a continuous center.

[0030] Furthermore, the staggered parallel inverter inductor 10 includes a plurality of insulating papers 600, each of which is coated on the side surfaces of a corresponding plurality of consecutively arranged magnetic core legs 300 to enhance insulation between the magnetic core legs 300 and the corresponding coils 400. In one embodiment, each insulating paper 600 is configured as a hollow cylindrical structure on the side surface of the corresponding magnetic core leg 300 to ensure conformity and stability between the insulating paper 600 and the side surface of the magnetic core leg 300.

[0031] Furthermore, the staggered parallel inverter inductor 10 further includes a plurality of partitions 700, which are respectively disposed on the facing side surfaces of adjacent magnetic yokes 200, so that each partition 700 can strengthen the insulation between the magnetic yoke 200 and the corresponding coil 400. Specifically, each partition 700 is provided with an avoidance groove, which is disposed in the center of the partition 700 and passes through both sides of the partition 700, so that the corresponding magnetic core column 300 can be connected to the magnetic yoke 200 through the avoidance groove. In one embodiment, the avoidance groove corresponds to the end surface of the magnetic core column 300, thereby forming a connection channel for the magnetic core column 300 to pass through, ensuring a complete connection between the magnetic core column 300 and the magnetic yoke 200 while ensuring the insulation between the magnetic yoke 200 and the coil 400.

[0032] Furthermore, the base plate 100 is provided with a plurality of pads 110, which are arranged equidistantly on the surface of the base plate 100 corresponding to the bottom ends of the three yokes 200. When the yoke 200 is installed to the base plate 100, each pad 110 abuts against the bottom end of the corresponding yoke 200 to provide stable support.

[0033] Furthermore, the base plate 100 is also provided with a plurality of wire outlet holes a, which pass through both sides of the base plate 100. When the four coils 400 are installed on the base plate 100, the two lead ends of each group of two coils 400 connected in series extend to the other side of the base plate 100 through the corresponding wire outlet holes a, so as to improve the convenience of installation and welding of the inductor.

[0034] In summary, the staggered parallel inverter inductor disclosed by the present invention is connected in series by two coils of the same coil group to form a two-phase magnetic integrated inductor structure, and the two coil groups are set in parallel in actual application, so that the two coils in series of the same phase realize close coupling of the magnetic circuit through the corresponding two adjacent magnetic yokes and several magnetic core columns. The two coils are connected in series to effectively improve the equivalent inductance value; and the parallel connection between the two-phase four coils can share the load current and effectively reduce the single-phase current stress. Combined with the above-mentioned series-parallel structure, the staggered parallel inverter inductor of the present invention can effectively reduce leakage inductance and improve energy transfer density, while improving the redundancy and reliability of the inductor; through the magnetic integration between the coils, the volume of the magnetic core can be effectively reduced, the compactness of the inductor structure can be improved, the copper loss can be reduced by parallel shunting and the control bandwidth can be equivalently improved, and the load transient response can be accelerated, so that the staggered parallel inverter inductor of the present invention is effectively improved in efficiency, power density and anti-interference ability.

[0035] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0036] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A staggered parallel inverter inductor, characterized in that: include: A base plate, three magnetic yokes, a plurality of magnetic core columns, and four coils. The three magnetic yokes are arranged in sequence and at equal intervals along a preset direction, and two adjacent magnetic yokes are arranged parallel to each other, thereby forming a space for accommodating the magnetic core columns and the coils. The plurality of magnetic core columns are respectively arranged between two adjacent magnetic yokes to form two parallel magnetic circuits. In combination with the two magnetic yokes, a complete magnetic circuit is formed. That is, the three magnetic yokes and the plurality of magnetic core columns form four magnetic circuits. Based on this, the four coils are respectively wound around the side surfaces of the plurality of magnetic core columns corresponding to the four magnetic circuits, thereby forming the main functional structure of the staggered parallel inverter inductor. The base plate is arranged on the bottom side of the three magnetic yokes, and one side surface of the base plate abuts against the bottom side surface of the three magnetic yokes, thereby stably supporting the three magnetic yokes, the plurality of magnetic core columns, and the four coils. The four coils are combined in pairs to form two coil groups. The two coil groups are extended along the arrangement direction of the three magnetic yokes. The two coils in the same coil group are accommodated between two adjacent magnetic yokes. In addition, the two coils in the same coil group are respectively wound around the side surfaces of several magnetic core columns corresponding to two adjacent magnetic circuits, and the two coils in the same coil group are connected in series.

2. The interleaved parallel inverter inductor according to claim 1, characterized in that: Each magnetic core column is configured as a columnar structure.

3. The interleaved parallel inverter inductor according to claim 2, characterized in that: Each magnetic core column is configured as a main body extending uniformly along one direction, and both ends of the magnetic core column are configured as flat end surfaces.

4. The interleaved parallel inverter inductor according to claim 3, characterized in that: A plurality of magnetic core column bodies are stacked and extended between two adjacent magnetic yokes to form a magnetic circuit of a preset length.

5. The interleaved parallel inverter inductor according to claim 4, characterized in that: Each magnetic circuit is formed by stacking four magnetic core columns.

6. The interleaved parallel inverter inductor according to claim 5, characterized in that: The staggered parallel inverter inductor further includes a plurality of air gaps, which are respectively arranged between two adjacent magnetic core columns and between the magnetic core column and the magnetic yoke. That is, each air gap is arranged at the end surface of the corresponding magnetic core column.

7. The interleaved parallel inverter inductor according to claim 6, characterized in that: The end surface of the air gap sheet corresponding to the magnetic core column is set as a ring plate structure with a center passing through.

8. The interleaved parallel inverter inductor according to claim 7, characterized in that: The staggered parallel inverter inductor further includes a plurality of insulating papers, each of which is coated on the side surfaces of the corresponding and continuously arranged magnetic core columns.

9. The interleaved parallel inverter inductor according to claim 8, characterized in that: The side surface of each insulating paper corresponding to the magnetic core column is set to a hollow cylindrical structure.

10. The interleaved parallel inverter inductor according to claim 9, characterized in that: The staggered parallel inverter inductor further includes a plurality of partitions, which are respectively arranged on the facing side surfaces of adjacent magnetic yokes.

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