AC three-phase common mode inductor

Abstract

The utility model discloses an AC (Alternating Current) three-phase common mode inductor, which belongs to the technical field of inductance elements and comprises a supporting seat frame, a magnetic core shell, an annular magnetic core, a winding group, a connecting sheet and a connecting terminal, a magnetic core shell is arranged on the supporting seat frame, and an annular magnetic core is accommodated in the magnetic core shell; the three winding groups are uniformly distributed, wound and connected outside the magnetic core shell, each winding group is provided with a first winding unit and a second winding unit, and the first winding unit and the second winding unit are oppositely arranged on the two sides of the magnetic core shell respectively; the plurality of connecting sheets and the plurality of connecting terminals are arranged on the other side surface of the supporting seat frame relative to the magnetic core shell, and one end part of each first winding unit is correspondingly connected with one end part of one second winding unit through one connecting sheet; and the other end part of each first winding unit and the other end part of each second winding unit are correspondingly connected with one connecting terminal. The technical problem how to improve the current endurance capability of the three-phase common-mode inductor is solved.

Description

Technical Field

[0001] This utility model relates to the technical field of inductor components, and in particular to an AC three-phase common-mode inductor. Background Technology

[0002] An inductor, often simply called an inductor, is a passive electronic component that can store magnetic field energy. Its main characteristic is that when current flows through it, it generates a magnetic field around it. When the current changes, this magnetic field also changes. As a result, an electromotive force (EMF) is generated across the inductor, which attempts to resist the change in current.

[0003] Inductors are further classified into self-inductance and mutual inductance. Self-inductance is the electromagnetic induction phenomenon caused by a change in the current within the coil itself. Mutual inductance, on the other hand, occurs when a change in the current in one coil induces an electromotive force in an adjacent coil. Both self-inductance and mutual inductance inductors have wide applications in practical circuits. In general, inductors play a crucial role in electronic circuits, performing functions such as filtering, oscillation, delay, and notch filtering. They are essential components that are frequently considered and used in circuit design within the field of electronic engineering.

[0004] Based on this, Chinese patent CN212485061U discloses a three-phase common-mode inductor, which includes a base plate, an iron core, and three coils. The iron core includes three winding sections spaced apart, with any two winding sections separated by a connecting section. The three coils are respectively wound on the corresponding winding sections and connected to the base plate. The winding sections and the connecting sections together form a hexagonal iron core structure. This structure allows for a perfect match between the coils and the iron core, reducing the coil diameter, improving the utilization rate of the iron core window, and effectively reducing the amount of copper or aluminum wire used and the volume of the inductor. Furthermore, this structure allows for the use of automated winding equipment to directly wind the coils onto the iron core, reducing the processing time for both the coils and the iron core.

[0005] However, while the aforementioned water-cooled three-phase common-mode inductor can reduce manufacturing costs, it suffers from poor inductance. Specifically, in a three-phase circuit, common-mode interference refers to interference signals acting simultaneously between the three-phase power supply and ground. The three-phase common-mode inductor provides a high-impedance path to channel the common-mode interference signal to ground, thereby filtering and suppressing it. Three-phase common-mode inductors are commonly used in industrial power environments, especially in high-current, high-voltage scenarios. This is because industrial power typically uses three-phase electricity with higher voltages (e.g., 380V); therefore, inductors capable of handling large currents are required. The AC three-phase common-mode inductor is a special type of inductor, commonly used for filtering and suppressing common-mode interference in three-phase circuits; its main characteristic is its three-winding configuration, distinguishing it from ordinary two-winding common-mode inductors. Therefore, improving the current-carrying capacity of the AC three-phase common-mode inductor and enhancing its inductance are pressing technical problems that need to be addressed. Utility Model Content

[0006] Therefore, it is necessary to provide an AC three-phase common-mode inductor to address the technical problem of how to improve the current withstand capability of a three-phase common-mode inductor.

[0007] An AC three-phase common-mode inductor includes: a support frame, a core housing, a toroidal core, winding groups, connecting pieces, and connecting terminals; the core housing is disposed on the support frame, and the toroidal core is housed within the cavity of the core housing; three winding groups are evenly distributed and wound around the core housing, each winding group having a first winding unit and a second winding unit, the first winding unit and the second winding unit being respectively disposed opposite to each other on both sides of the core housing; a plurality of connecting pieces and a plurality of connecting terminals are disposed opposite to the core housing on the other side of the support frame, one end of each first winding unit is connected to one end of a second winding unit via a connecting piece, and the other end of each first winding unit and the other end of each second winding unit are respectively connected to a connecting terminal.

[0008] Furthermore, the support frame is provided with a support block, a receiving cavity, a clamping part, a partition block, several insertion holes, and several fixing mounting holes.

[0009] Furthermore, the support block is provided with the receiving cavity, and the magnetic core housing is disposed in the receiving cavity; the clamping part is disposed in the receiving cavity, and the clamping part is engaged with the side of the magnetic core housing.

[0010] Furthermore, the three partition blocks are disposed below the support block relative to the accommodating cavity, and the three partition blocks are evenly spaced apart; a plurality of insertion holes are evenly distributed in the support block, and a plurality of fixing holes are evenly distributed around the periphery of the support block.

[0011] Furthermore, the magnetic core housing has a first housing, a second housing, and an annular cavity; the first housing and the second housing are arranged to open and close relative to each other, the annular cavity is disposed between the first housing and the second housing, and the annular magnetic core is disposed in the annular cavity.

[0012] Furthermore, each of the first winding units has a first winding portion, a first pin, and a second pin; the first winding portion is wound around the outside of the magnetic core housing, the first pin and the second pin are respectively connected to the two ends of the first winding portion, and the first pin and the second pin are respectively inserted into an insertion hole.

[0013] Furthermore, each of the second winding units has a second winding portion, a third pin, and a fourth pin; the second winding portion is wound around the other side of the magnetic core housing relative to the first winding portion, the third pin and the fourth pin are respectively connected to the two ends of the second winding portion, and the third pin and the fourth pin are respectively inserted into an insertion hole.

[0014] Furthermore, the connecting piece can be a U-shaped copper sheet structure, and the connecting piece connects the first pin and the third pin respectively.

[0015] Furthermore, the connection terminal has a pin connection piece, a plug end, and an auxiliary connection sleeve.

[0016] Furthermore, one end of the pin connector is connected to the second pin or the fourth pin, and the other end of the pin connector is connected to the connector terminal. The auxiliary connector sleeve connects the connector terminal and the pin connector respectively.

[0017] In summary, this utility model discloses an AC three-phase common-mode inductor comprising a support frame, a core housing, a toroidal core, winding groups, connecting pieces, and connecting terminals. The core housing is mounted on the support frame, and the toroidal core is housed within the inner cavity of the core housing. Three winding groups are evenly distributed and wound around the core housing. Each winding group comprises a first winding unit and a second winding unit, which are respectively disposed opposite to each other on both sides of the core housing. A plurality of connecting pieces and a plurality of connecting terminals are disposed opposite to the core housing on the other side of the support frame. One end of each first winding unit is connected to one end of a second winding unit via a connecting piece, and the other end of each first winding unit and the other end of each second winding unit are respectively connected to a connecting terminal. This invention relates to an AC three-phase common-mode inductor. Through a series design of a first winding unit, a second winding unit, a connecting piece, and connecting terminals, it significantly increases parameters such as the number of turns in the inductor coil, thereby enhancing the inductor's inductance and improving its current withstand capability. Furthermore, by placing the toroidal core within the core housing, it further reduces magnetic induction losses. Therefore, this invention solves the technical problem of how to improve the current withstand capability of a three-phase common-mode inductor. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an AC three-phase common-mode inductor according to the present invention;

[0019] Figure 2 This is a schematic diagram of the exploded structure of an AC three-phase common-mode inductor from another direction according to this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of an AC three-phase common-mode inductor in another direction according to this utility model. Detailed Implementation

[0021] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0022] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0026] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening 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 possible implementation.

[0027] Please refer to the following: Figures 1 to 3 This utility model discloses an AC three-phase common-mode inductor comprising: a support frame 1, a magnetic core housing 2, a ring magnetic core 3, winding groups 4, connecting pieces 5, and connecting terminals 6; the magnetic core housing 2 is disposed on the support frame 1, and the ring magnetic core 3 is housed within the inner cavity of the magnetic core housing 2; the three winding groups 4 are evenly distributed and wound around the outside of the magnetic core housing 2, each winding group 4 being provided with a first winding unit 401 and a second winding unit 402, the first winding unit 401 and the second winding unit 402 being respectively disposed opposite to each other on both sides of the magnetic core housing 2; a plurality of connecting pieces 5 and a plurality of connecting terminals 6 are disposed opposite to the magnetic core housing 2 on the other side of the support frame 1, one end of each first winding unit 401 is connected to one end of a second winding unit 402 via a connecting piece 5, and the other end of each first winding unit 401 and the other end of each second winding unit 402 are respectively connected to a connecting terminal 6.

[0028] Specifically, in the technical solution disclosed in this utility model of an AC three-phase common-mode inductor, the support frame 1 is preferably made of insulating material, such as plastic; and the magnetic core housing 2 provided on the support frame 1 can also be made of plastic; the magnetic core housing 2 completely encloses the annular magnetic core 3 and is placed on the support frame 1; the entire annular body of the annular magnetic core 3 can be completely insulated; then, the three winding groups 4 are evenly arranged and wound on the magnetic core housing 2 to form the main winding body of the AC three-phase common-mode inductor. Each winding group 4 consists of two winding units, namely a first winding unit 401 and a second winding unit 402; in particular, one end of each first winding unit 401 is connected to one end of each second winding unit 402 through a connecting piece 5, and the other end of each first winding unit 401 and the other end of each second winding unit 402 are connected to a connecting terminal 6. More specifically, in each of the winding groups 4, one lead end of the first winding unit 401 and the second winding unit 402 are connected by the connecting piece 5; the connecting piece 5 is preferably made of a conductor material such as copper or copper alloy; the connecting piece 5 is used to electrically connect the two winding units to each other; and the other lead end of each winding unit, namely the first winding unit 401 and the second winding unit 402, is electrically connected to an external circuit through the connecting terminal 6; thus, in a winding group 4, unlike the form of a three-phase common mode inductor formed by a single winding end ring arrangement disclosed in the prior art, the AC three-phase common mode inductor of this utility model can significantly increase the number of turns of the inductor coil and other parameters through the series design of the first winding unit 401, the second winding unit 402, the connecting piece 5 and the connecting terminal 6, thereby enhancing the inductance of the inductor and improving the current withstand capability of the inductor; moreover, by setting the toroidal magnetic core 3 in the magnetic core housing 2, the generation of magnetic induction loss can be further reduced.

[0029] Furthermore, the support frame 1 is provided with a support block 101, a receiving cavity 102, a clamping part 103, a partition block 104, a plurality of insertion holes 105, and a plurality of fixing mounting holes 106; the receiving cavity 102 is provided on the support block 101, and the magnetic core housing 2 is disposed in the receiving cavity 102; the clamping part 103 is disposed in the receiving cavity 102, and the clamping part 103 is engaged with the side of the magnetic core housing 2; the three partition blocks 104 are disposed below the support block 101 relative to the receiving cavity 102, and the three partition blocks 104 are evenly spaced; the plurality of insertion holes 105 are evenly distributed in the support block 101, and the plurality of fixing mounting holes 106 are evenly distributed around the periphery of the support block 101.

[0030] Specifically, the support block 101 is a basic support structure, and the accommodating cavity 102 provided thereon can match the outer shape of the magnetic core housing 2, thereby accommodating the magnetic core housing 2 therein. The accommodating cavity 102 is also provided with at least one set of clamping parts 103, which clamp and engage the middle and sides of the magnetic core housing 2, thereby confining the magnetic core housing 2 within the accommodating cavity 102. The partition block 104 can be used to separate the winding assembly 4; the insertion hole 105 can be used to insert the lead end connecting the winding assembly 4; the fixed mounting hole 106 is used to fix the support frame 1 in a predetermined external environment, such as an external circuit board.

[0031] Furthermore, the magnetic core housing 2 has a first housing 201, a second housing 202, and an annular cavity 203; the first housing 201 and the second housing 202 are arranged to open and close relative to each other, the annular cavity 203 is disposed in the first housing 201 and the second housing 202, and the annular magnetic core 3 is disposed in the annular cavity 203.

[0032] Furthermore, each of the first winding units 401 has a first winding portion 401a, a first pin 401b, and a second pin 401c; the first winding portion 401a is wound around the outside of the magnetic core housing 2, the first pin 401b and the second pin 401c are respectively connected to the two ends of the first winding portion 401a, and the first pin 401b and the second pin 401c are respectively inserted into an insertion hole 105.

[0033] Similarly, each of the second winding units 402 has a second winding portion 402a, a third pin 402b, and a fourth pin 402c; the second winding portion 402a is wound around the other side of the magnetic core housing 2 relative to the first winding portion 401a, the third pin 402b and the fourth pin 402c are respectively connected to the two ends of the second winding portion 402a, and the third pin 402b and the fourth pin 402c are respectively inserted into an insertion hole 105.

[0034] Furthermore, the connecting piece 5 can be a U-shaped copper sheet structure, and the connecting piece 5 is respectively connected to the first pin 401b and the third pin 402b.

[0035] Furthermore, the connection terminal 6 has a pin connection piece 601, a plug end 602, and an auxiliary connection sleeve 603; one end of the pin connection piece 601 is connected to the second pin 401c or the fourth pin 402c respectively, the other end of the pin connection piece 601 is connected to the plug end 602, and the auxiliary connection sleeve 603 connects the plug end 602 and the pin connection piece 601 respectively.

[0036] Specifically, the pin connecting piece 601 of the connecting terminal 6 can be electrically connected to the second pin 401c or the fourth pin 402c; thus, the plug-in terminal 602 can be electrically connected to the first winding portion 401a and the second winding portion 402a respectively; and the first pin 401b and the third pin 402b respectively provided between the first winding portion 401a and the second winding portion 402a can be electrically connected through the connecting piece 5; and the auxiliary connecting sleeve 603 can be sleeved on the pin connecting piece 601, thereby making the pin connecting piece 601 stably connected to the plug-in terminal 602, and connecting the plug-in terminal to the external circuit; thus, each winding group 4 can form a single-loop energized circuit with the external circuit.

[0037] Specifically, in order to avoid short circuits and other effects caused by the pins of adjacent winding groups 4 overlapping each other, the three partition blocks 104 provided under the support frame 1 can insulate and isolate the two connected pins.

[0038] In summary, the present invention discloses an AC three-phase common-mode inductor comprising a support frame 1, a magnetic core housing 2, a ring magnetic core 3, winding groups 4, connecting pieces 5, and connecting terminals 6. The magnetic core housing 2 is mounted on the support frame 1, and the ring magnetic core 3 is housed within the inner cavity of the magnetic core housing 2. The three winding groups 4 are evenly distributed and wound around the outside of the magnetic core housing 2. Each winding group 4 is provided with a first winding unit 401 and a second winding unit 402, which are respectively disposed opposite to each other on both sides of the magnetic core housing 2. A plurality of connecting pieces 5 and a plurality of connecting terminals 6 are disposed opposite to the magnetic core housing 2 on the other side of the support frame 1. One end of each first winding unit 401 is connected to one end of a second winding unit 402 via a connecting piece 5, and the other end of each first winding unit 401 and the other end of each second winding unit 402 are respectively connected to a connecting terminal 6. This invention relates to an AC three-phase common-mode inductor. Through the series connection of a first winding unit 401, a second winding unit 402, a connecting piece 5, and a connecting terminal 6, the inductor's winding turns and other parameters are significantly increased, thereby enhancing its inductance and improving its current withstand capability. Furthermore, by placing the toroidal core 3 within the core housing 2, magnetic induction losses can be further reduced. Therefore, this invention solves the technical problem of how to improve the current withstand capability of a three-phase common-mode inductor.

[0039] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0040] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An AC three-phase common-mode inductor, characterized in that, It includes: support The support frame (1), magnetic core housing (2), toroidal magnetic core (3), winding assembly (4), connecting piece (5), and connecting terminal (6) are provided; the magnetic core housing (2) is disposed on the support frame (1), and the toroidal magnetic core (3) is housed in the inner cavity of the magnetic core housing (2); the three winding assemblies (4) are evenly distributed and wound around the magnetic core housing (2), and each winding assembly (4) is provided with a first winding unit (401) and a second winding unit (402), the first winding unit (401) and the second winding unit (402) are connected. 02) They are respectively disposed on both sides of the magnetic core housing (2); a plurality of connecting pieces (5) and a plurality of connecting terminals (6) are disposed on the other side of the support frame (1) relative to the magnetic core housing (2); one end of each first winding unit (401) is connected to one end of a second winding unit (402) through a connecting piece (5); the other end of each first winding unit (401) and the other end of each second winding unit (402) are connected to a connecting terminal (6).

2. The AC three-phase common-mode inductor according to claim 1, characterized in that: The support frame (1) is provided with a support block (101), a receiving cavity (102), a clamping part (103), a partition block (104), a number of insertion holes (105) and a number of fixing mounting holes (106).

3. An AC three-phase common-mode inductor according to claim 2, characterized in that: The support block (101) is provided with the accommodating cavity (102), and the magnetic core housing (2) is disposed in the accommodating cavity (102); the clamping part (103) is disposed in the accommodating cavity (102), and the clamping part (103) is engaged with the side of the magnetic core housing (2).

4. An AC three-phase common-mode inductor according to claim 3, characterized in that: The three partition blocks (104) are disposed below the support block (101) relative to the accommodating cavity (102), and the three partition blocks (104) are evenly spaced apart; a plurality of insertion holes (105) are evenly distributed in the support block (101), and a plurality of fixing holes (106) are evenly distributed around the support block (101).

5. An AC three-phase common-mode inductor according to claim 4, characterized in that: The magnetic core housing (2) has a first housing (201), a second housing (202), and an annular cavity (203); the first housing (201) and the second housing (202) are arranged to open and close relative to each other, the annular cavity (203) is disposed in the first housing (201) and the second housing (202), and the annular magnetic core (3) is disposed in the annular cavity (203).

6. An AC three-phase common-mode inductor according to claim 5, characterized in that: Each of the first winding units (401) has a first winding portion (401a), a first pin (401b), and a second pin (401c); the first winding portion (401a) is wound around the outside of the magnetic core housing (2), the first pin (401b) and the second pin (401c) are respectively connected to the two ends of the first winding portion (401a), and the first pin (401b) and the second pin (401c) are respectively inserted into an insertion hole (105).

7. An AC three-phase common-mode inductor according to claim 6, characterized in that: Each of the second winding units (402) has a second winding portion (402a), a third pin (402b), and a fourth pin (402c); the second winding portion (402a) is wound around the other side of the magnetic core housing (2) relative to the first winding portion (401a), the third pin (402b) and the fourth pin (402c) are respectively connected to the two ends of the second winding portion (402a), and the third pin (402b) and the fourth pin (402c) are respectively inserted into an insertion hole (105).

8. An AC three-phase common-mode inductor according to claim 7, characterized in that: The connecting piece (5) is a U-shaped copper sheet structure, and the connecting piece (5) connects the first pin (401b) and the third pin (402b) respectively.

9. An AC three-phase common-mode inductor according to claim 8, characterized in that: The connection terminal (6) has a pin connection piece (601), a plug end (602), and an auxiliary connection sleeve (603).

10. An AC three-phase common-mode inductor according to claim 9, characterized in that: One end of the pin connector (601) is connected to the second pin (401c) or the fourth pin (402c) respectively, and the other end of the pin connector (601) is connected to the plug-in terminal (602). The auxiliary connector sleeve (603) connects the plug-in terminal (602) and the pin connector (601) respectively.

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