Multi-phase TLVR inductor and electric device

Abstract

The utility model relates to the technical field of inductance piece structures, and provides a multiphase TLVR inductor and an electric device, the multiphase TLVR inductor comprises N single-phase TLVR inductors, N is greater than or equal to 2, each single-phase TLVR inductor comprises a magnetic core, a primary coil and a secondary coil, the primary coil and the secondary coil are installed on the magnetic core, and the secondary coil and the primary coil can be mutually inducted to form a mutual inductance coil group; and the secondary coils of the N single-phase TLVR inductors are electrically connected through the connecting piece. Thus, according to the layout form of the power supply circuit in the circuit board, the layout mode of the pins in the multi-phase TLVR inductor is planned, the pins which are easy to shield or the pins which are easy to interfere with each other during welding are connected through the connecting pieces in advance, normal connection is guaranteed, the problems of pseudo soldering, solder skips and the like are avoided, the operation difficulty is simplified, and the production efficiency is improved. And the product quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of inductor structure, in particular to a multi-phase TLVR inductor and an electrical component. Background Art

[0002] Data centers utilize powerful ASICs such as CPUs, GPUs, machine learning accelerators, network switches, and servers that consume significant current—up to kiloamperes, for example—and experience rapid fluctuations in their power requirements. Multiphase voltage regulators (VRs) have traditionally been used to power these loads. However, these conventional VRs are reaching their performance limits, for example, in terms of transient response and current sourcing capability.

[0003] TLVR (Trans Inductor Voltage Regulator) means using a tuned inductor in series with the secondary winding of a coupled inductor to increase the coupled current, thereby rapidly increasing the transient current response speed.

[0004] like Figure 9 As shown, when designing the structure of the existing TLVR inductor, in order to be compatible with the power supply architecture of ordinary inductors, its four pins are arranged in sequence. When multiple TLVRs are installed on a circuit board, each pin of each TLVR inductor needs to be soldered to the power supply circuit of the circuit board.

[0005] During the operation, it was found that the four pins were arranged compactly, which made short circuits prone to occur during welding; and the two pins located on the inside were inconvenient to operate during welding, which made it easy for problems such as cold soldering and leaking soldering to occur. Moreover, during the subsequent inspection of the welding quality of each pin, the two inner pins were relatively hidden, and the staff's vision was obstructed, making it difficult to obtain information clearly. This resulted in complicated operations in the product assembly and inspection process, relatively low efficiency, and low work quality.

[0006] To address this issue, existing techniques propose changing the pin layout, placing the inner pins on the periphery of the core to reduce obstruction and facilitate operation. However, in actual production, the pin layout must be designed based on the circuit board layout requirements. When the inductors are arranged in a matrix, the periphery of the inductors may be obstructed, causing the pins originally located on the periphery to be blocked by other electrical components.

[0007] Therefore, there is an urgent need for a multi-phase TLVR inductor and electrical components to solve the above technical problems. Utility Model Content

[0008] The purpose of the utility model is to provide a multi-phase TLVR inductor and electrical components, which can reduce the occurrence of cold solder joints, leaky solder joints and the like, ensure the connection reliability between each pin, and simplify the soldering process between the circuit board and improve the soldering quality.

[0009] To achieve this purpose, the present invention adopts the following technical solutions:

[0010] A multi-phase TLVR inductor, characterized by comprising:

[0011] N single-phase TLVR inductors, N ≥ 2, each single-phase TLVR inductor includes a magnetic core, and a primary coil and a secondary coil mounted on the magnetic core, the secondary coil being able to form a mutual inductance coil group with the primary coil;

[0012] Connecting piece, the secondary coils of N single-phase TLVR inductors are electrically connected through the connecting piece.

[0013] As a preferred technical solution of the above-mentioned multi-phase TLVR inductor, the primary coil and the secondary coil each include two pins; all the pins are located at the same end of the magnetic core in the third direction.

[0014] As a preferred technical solution of the above-mentioned multi-phase TLVR inductor, the two pins of the primary coil are located on opposite sides of the magnetic core in the second direction, and the two pins of the secondary coil are located on opposite sides of the magnetic core in the first direction; or, the four pins are distributed sequentially along the second direction;

[0015] The first direction, the second direction and the third direction are perpendicular to each other.

[0016] As a preferred technical solution for the above-mentioned multi-phase TLVR inductor, any coil in the primary coil and the secondary coil also includes a coil body connected to two pins, the coil body of the secondary coil is located on the inner side of the coil body of the primary coil, and a first insulating layer is provided on the surface of the coil body of the primary coil and / or the surface of the coil body of the secondary coil.

[0017] As a preferred technical solution of the above-mentioned multi-phase TLVR inductor, the coil body of the primary coil and the coil body of the secondary coil are fixed by bonding.

[0018] As a preferred technical solution of the above-mentioned multi-phase TLVR inductor, the primary coil and the magnetic core are fixed by bonding, and / or the secondary coil and the magnetic core are fixed by bonding.

[0019] As a preferred technical solution of the above-mentioned multi-phase TLVR inductor, the connector and the pin are fixed by any one of laser welding, ultrasonic welding, solder paste welding, and riveting.

[0020] As a preferred technical solution of the above-mentioned multi-phase TLVR inductor, the magnetic cores of two adjacent single-phase TLVR inductors are fixed by bonding.

[0021] As a preferred technical solution of the above-mentioned multi-phase TLVR inductor, a second insulating layer is provided on the end surface of the magnetic core that is in contact with the circuit board.

[0022] An electrical device is also provided, comprising a circuit board and the above-mentioned multi-phase TLVR inductor, wherein the circuit board is provided with a power supply circuit, and the pins of the multi-phase TLVR inductor that are not connected by the connector are welded to the power supply circuit.

[0023] Beneficial effects of the utility model:

[0024] The present invention provides a multi-phase TLVR inductor and electrical component. The multi-phase TLVR inductor includes N single-phase TLVR inductors, where N is greater than or equal to 2. Each single-phase TLVR inductor includes a magnetic core, a primary coil mounted on the magnetic core, and a secondary coil. The secondary coil can form a mutual inductance coil group with the primary coil through mutual inductance. Connectors are also provided, and the secondary coils of the N single-phase TLVR inductors are electrically connected via the connectors. Thus, the pin layout of the multi-phase TLVR inductor is planned based on the layout of the power supply circuit in the circuit board. Pins that are easily obscured or relatively close to each other and prone to interference during soldering are first connected via the connectors to ensure proper connection. Pins that are easily soldered to the circuit board are then soldered to the circuit board to avoid problems such as cold solder joints and leaky solder joints. This simplifies the operation and improves product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0026] Figure 1 Schematic diagram of the structure of a multi-phase TLVR inductor provided by an embodiment of the present utility model;

[0027] Figure 2 This is a schematic structural diagram of a first magnetic core sub-body provided by an embodiment of the present utility model;

[0028] Figure 3 This is a schematic diagram of the assembly of the primary coil and the secondary coil provided in an embodiment of the present utility model;

[0029] Figure 4 This is a schematic diagram of the assembly of the primary coil, the secondary coil and the first magnetic core sub-body provided by an embodiment of the present utility model;

[0030] Figure 5 This is a schematic diagram of the pin arrangement of the multi-phase TLVR inductor provided by the embodiment of the utility model Figure 1 ;

[0031] Figure 6This is a schematic diagram of the pin arrangement of the multi-phase TLVR inductor provided by the embodiment of the utility model Figure 2 ;

[0032] Figure 7 This is a schematic diagram of the pin arrangement of the multi-phase TLVR inductor provided by the embodiment of the utility model Figure 3 ;

[0033] Figure 8 This is a schematic diagram of the pin arrangement of the multi-phase TLVR inductor provided by the embodiment of the utility model Figure 4 ;

[0034] Figure 9 It is a structural diagram of a single-phase TLVR inductor in the prior art.

[0035] In the picture:

[0036] 1. Single-phase TLVR inductor;

[0037] X, first direction; Y, second direction; Z, third direction;

[0038] 100, magnetic core; 110, first magnetic core sub-body; 111, receiving groove; 112, center column; 113, first side wall; 114, second side wall; 120, second magnetic core sub-body;

[0039] 200, primary coil; 210, first input pin; 220, first output pin; 230, first winding body;

[0040] 300, secondary coil; 310, second input pin; 320, second output pin; 330, second winding body;

[0041] 400, connecting piece; 410, first connecting piece; 420, second connecting piece. DETAILED DESCRIPTION

[0042] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0043] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0044] In the present invention, 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.

[0045] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0046] like Figures 1 to 8 As shown, the present invention provides a multi-phase TLVR inductor, including N single-phase TLVR inductors 1, N ≥ 2, each single-phase TLVR inductor 1 includes a magnetic core 100, and a primary coil 200 and a secondary coil 300 installed on the magnetic core 100, the secondary coil 300 can form a mutual inductance coil group with the primary coil 200; the secondary coils 300 of the N single-phase TLVR inductors 1 are electrically connected through a connector 400.

[0047] The primary coil 200 and the secondary coil 300 are insulated and not electrically connected. The primary coil 200 is used to connect to the power supply circuit, and the secondary coil 300 is used to connect to the power supply circuit and form a mutual inductance coil group with the primary coil 200. The single-phase TLVR inductor 1 has relatively high transient response performance, meets load requirements, and reduces losses. It can maintain a small output capacitance value, thereby reducing the installation area and system cost.

[0048] Specifically, the primary coil 200 and the secondary coil 300 each include two pins. That is, each single-phase TLVR inductor 1 includes four pins. When assembling the single-phase TLVR inductor 1 to a circuit board, each of the four pins must be soldered to the power supply circuit on the circuit board to complete the electrical connection. However, when multiple single-phase TLVR inductors 1 are soldered and mounted together on a circuit board to form a multi-phase TLVR inductor, adjacent single-phase TLVR inductors 1 can easily become blocked, resulting in insufficient clearance for some pins. This can lead to cold or leaky solder joints during the soldering process, or even short circuits due to the densely distributed pins.

[0049] To this end, in this embodiment, before the N single-phase TLVR inductors 1 are installed on the circuit board, some of the pins of the secondary coil 300 are first connected through the connector 400 to ensure their electrical connection. Then, the pins not connected through the connector 400 are directly soldered to the power supply circuit on the circuit board. In this way, the layout of the pins in the multi-phase TLVR inductor is planned according to the layout of the power supply circuit in the circuit board, and the pins that are easily blocked or the pins that are relatively close and easily interfere with each other during soldering are first connected through the connector 400 to ensure their normal connection. Then, the pins that are easy to solder to the circuit board are soldered to the circuit board to avoid problems such as cold soldering and leaking soldering. This simplifies the operation difficulty and improves product quality.

[0050] Optionally, the primary coil 200 and the secondary coil 300 each include two pins, and all the pins are located at the same end of the magnetic core 100 in the third direction Z. This facilitates connection of the pins.

[0051] Optionally, the two pins of the primary coil 200 are located on opposite sides of the magnetic core 100 in the second direction Y, and the two pins of the secondary coil 300 are located on opposite sides of the magnetic core 100 in the first direction X; or, the four pins are distributed sequentially along the second direction Y; the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0052] Assume that the primary coil 200 is provided with a first input pin 210 and a first output pin 220 , and the secondary coil 300 includes a second input pin 310 and a second output pin 320 .

[0053] One embodiment is as follows: Figure 6As shown, the two pins of the primary coil 200 are located on opposite sides of the magnetic core 100 in the second direction Y, and the two pins of the secondary coil 300 are located on opposite sides of the magnetic core 100 in the first direction X. The first output pin 220 and the first input pin 210 are respectively disposed on opposite edges of the magnetic core 100 in the second direction Y. The first input pin 210 and the first output pin 220 are located on a first straight line, and the second input pin 310 and the second output pin 320 are located on a second straight line. The first straight line intersects the second straight line. The first-order second input pin 310 is formed on one end surface of the magnetic core 100 in the first direction X, and the n-th-order second output pin 320 is formed on the other end surface of the magnetic core 100 in the first direction X. Thus, when soldering the multi-phase TLVR inductor to the circuit board, the second output pin 320 of the previous sequence is connected to the second input pin 310 of the next sequence via the connector 400, and the first output pin 220, the first input pin 210, the second input pin 310 of the first sequence, and the second output pin 320 of the nth sequence are soldered to the circuit board. Preferably, the first straight line is perpendicular to the second straight line. In this case, along the first direction X, the second output pin 320 of the previous sequence and the second input pin 310 of the next sequence are closest and located on the same straight line. The connector 400 has a simple design and facilitates connection.

[0054] Another embodiment is as follows: Figure 5 As shown, the four pins are distributed sequentially along the second direction Y. Specifically, in the same installation position, the first input pin 210, the second input pin 310, the second output pin 320, and the first output pin 220 are arranged sequentially along the fourth direction. The fourth direction forms an angle α with the first direction X, satisfying 0°<α<180°. Preferably, α=90°, that is, the fourth direction is parallel to the second direction Y. The first input pin 210 and the first output pin 220 are located at the two side edges of the magnetic core 100 in the second direction Y. In the first direction X, the first-order second output pin 320 of the multi-phase TLVR inductor is connected to the second-order second input pin 310 via a connector 400. The second-order second output pin 320 is connected to the third-order second input pin 310 via a connector 400, and so on, until the second output pin 320 at the n-1th order is connected to the second input pin 310 at the nth order via a connector 400. When welding a multi-phase TLVR inductor to a circuit board, it is only necessary to weld all the first output pins 220, the first input pins 210, the second input pins 310 at the first order, and the second output pins 320 at the nth order to the circuit board. The pins welded to the circuit board are mostly distributed on the peripheral edge of the magnetic core 100, which facilitates welding operations and detection of welding effects, thereby ensuring connectivity.

[0055] In this manner, the first input pin 210 and the first output pin 220 are located outside the second input pin 310 and the second output pin 320. That is, the first input pin 210 and the first output pin 220 are closer to the edge of the magnetic core 100 in the second direction Y. Pins located in this position are easier to solder and easier to inspect the soldering results. When soldering the multi-phase TLVR inductor to a circuit board, only the first input pin 210 and the first output pin 220 need to be soldered to the circuit board. The second input pin 310 at the beginning of the first direction X and the second output pin 320 at the end of the first direction X need to be soldered to the circuit board. The remaining second input pins 310 and second output pins 320 are all connected by the connector 400. This ensures that each pin of the multi-phase TLVR inductor is electrically connected, maintaining a stable connection to the circuit board. By eliminating the soldering process for some of the second output pins 320 and second input pins 310 to the circuit board, production efficiency and quality can be improved.

[0056] In other embodiments, Figure 7 and Figure 8 As shown, the first output pin 220, the first input pin 210, the second output pin 320 and the second input pin 310 are all formed on the opposite side edges of the magnetic core 100 in the second direction Y. However, since the pins of the primary coil 200 and the pins of the secondary coil 300 are close to each other, when the multi-phase TLVR inductor is soldered to the circuit board, the primary coil 200 and the secondary coil 300 are prone to short circuit. At this time, the first output pin 220 of the previous sequence and the first input pin 210 of the next sequence can be connected in advance through the connector 400, and / or the second output pin 320 of the previous sequence and the second input pin 310 of the next sequence can be connected through the connector 400. In this way, the distance between two adjacent solder joints on the same side of the magnetic core 100 in the second direction Y is increased, which facilitates the welding operation and reduces the risk of short circuit.

[0057] Exemplarily, the first input pin 210 and the first output pin 220 are spaced apart along the first direction X, and the second input pin 310 and the second output pin 320 are spaced apart along the first direction X, that is, the line connecting the two pins of the primary coil 200 is parallel to the line connecting the two pins of the secondary coil 300. In the first direction X, the first input pin 210 and the second input pin 310 at the mounting position at the head end are located on one end surface of the magnetic core 100 in the first direction X, and the first output pin 220 and the second output pin 320 at the mounting position at the tail end are located on the other end surface of the magnetic core 100 in the first direction X. When the multi-phase TLVR inductor is soldered to the circuit board, only the first input pin 210 and the second input pin 310 at the head end of the magnetic core 100 in the first direction X need to be soldered to the circuit board, and the first output pin 220 and the second output pin 320 at the tail end need to be soldered to the circuit board. The remaining pins located in the middle are connected via the connector 400. That is, the first connector 410 is used to connect the first output pin 220 and the first input pin 210, and the second connector 420 is used to connect the second output pin 320 and the second input pin 310. The first connector 410 and the second connector 420 are insulated from each other.

[0058] Exemplarily, a line connecting two pins of the primary coil 200 and a line connecting two pins of the secondary coil 300 are arranged at an angle.

[0059] In this way, when multiple sets of multi-phase TLVR inductors are required to be arranged in sequence along the second direction Y, all the pins in the middle of the multi-phase TLVR inductors are connected by the connector 400, and only the pins at the beginning and end of the first direction X are soldered to the circuit board. This can simplify the soldering process and ensure soldering quality, avoiding quality problems caused by obstruction or dense solder joints.

[0060] Optionally, each of the primary coil 200 and the secondary coil 300 further includes a coil body connecting the two pins. The coil body of the secondary coil 300 is located inside the coil body of the primary coil 200. A first insulating layer is provided on the surface of the coil body of the primary coil 200 and / or the surface of the coil body of the secondary coil 300. In this manner, the first input pin 210, the second input pin 310, the second output pin 320, and the first output pin 220 are all electrically connected. The provision of the first insulating layer between the first winding body 230 and the second winding body 330 prevents electrical connection between the primary coil 200 and the secondary coil 300 within the magnetic core 100.

[0061] It should be noted that, in the same installation position, any pin of the primary coil 200 is not electrically connected to any pin of the secondary coil 300 .

[0062] Optionally, the second winding body 330 is an enameled wire structure. The enameled wire structure is composed of a conductor and an insulating layer. The conductor bare wire is annealed and softened, and then painted and baked multiple times. The paint layer formed by the painting is the insulating layer.

[0063] Optionally, the coil body of the primary coil 200 and the coil body of the secondary coil 300 are fixed by bonding. In this way, the arrangement is easy to assemble and can reduce the use of connectors.

[0064] Optionally, the primary coil 200 and the magnetic core 100 are fixed by bonding, and / or the secondary coil 300 and the magnetic core 100 are fixed by bonding. In this way, the arrangement is easy to assemble and can reduce the use of connectors.

[0065] Optionally, the magnetic cores 100 of two adjacent single-phase TLVR inductors 1 are fixed by bonding. This arrangement facilitates assembly and can reduce the use of connectors.

[0066] Optionally, a second insulating layer is provided on the end surface of the magnetic core 100 that is in contact with the circuit board.

[0067] Exemplarily, the second insulating layer is an insulating coating. When the magnetic core 100 is fixed to the circuit board, the second insulating layer can prevent the magnetic core 100 from being electrically connected to the circuit board, thereby meeting the product's requirement of withstanding high voltage.

[0068] Optionally, the connector 400 and the pin are fixed by any one of laser welding, ultrasonic welding, solder paste welding, and riveting.

[0069] Optionally, the magnetic core 100 includes multiple magnetic core sub-bodies, which are arranged sequentially along the first direction X and fixed to each other. A mounting position is formed between two adjacent magnetic core sub-bodies, and the primary coil 200 and the secondary coil 300 are installed in the mounting position. In this way, any number of magnetic core sub-bodies can be selected for assembly according to usage requirements, which enhances applicability. It should be noted that the number of selected magnetic core sub-bodies needs to be greater than three to form two or more mounting positions to form a multi-phase TLVR inductor.

[0070] In other embodiments, the plurality of magnetic cores 100 may be integrally formed.

[0071] Furthermore, the magnetic core sub-body includes a first magnetic core sub-body 110 and a second magnetic core sub-body 120. The first magnetic core sub-body 110 is provided with two ends respectively located at the head and tail of the first direction X. The second magnetic core sub-body 120 is clamped between the two first magnetic core sub-bodies 110. The first magnetic core sub-body 110 and / or the second magnetic core sub-body 120 is provided with a receiving groove 111. After the first magnetic core sub-body 110 and the second magnetic core sub-body 120 are fixedly connected, the receiving groove 111 is closed in the first direction X to form an installation position.

[0072] Exemplarily, two first magnetic core sub-bodies 110 are provided, located at the head and tail ends of the magnetic core 100 in the first direction X, respectively. A plurality of second magnetic core sub-bodies 120 are provided between the two first magnetic core sub-bodies 110. That is, if n mounting positions are required, n>1, then n-1 second magnetic core sub-bodies 120 need to be configured accordingly. When n=2, only one second magnetic core sub-body 120 is required, and the mounting position is formed between the first magnetic core sub-body 110 and the second magnetic core sub-body 120. When n>2, at least two second magnetic core sub-bodies 120 are required, and the mounting position is formed not only between the first magnetic core sub-body 110 and the second magnetic core sub-body 120, but also between the two second magnetic core sub-bodies 120.

[0073] If the first magnetic core body 110 is provided with a receiving groove 111, the receiving groove 111 is formed on the side of the first magnetic core body 110 facing the second magnetic core body 120; if the second magnetic core body 120 is provided with a receiving groove 111, the second magnetic core body 120 is provided with receiving grooves 111 on both opposite sides of the second direction Y.

[0074] Exemplarily, when n=2, at least one of the first magnetic core sub-body 110 and the second magnetic core sub-body 120 is provided with a receiving groove 111 .

[0075] Exemplarily, when n>2, the second magnetic core sub-body 120 is provided with a receiving groove 111 .

[0076] For example, Figure 2 and Figure 4 As shown, the accommodating groove 111 includes a first side wall 113 in the first direction X and two second side walls 114 symmetrically arranged in the second direction Y. The accommodating groove 111 is opened on the first magnetic core body 110. After the first magnetic core body 110 and the second magnetic core body 120 are fixed along the first direction X, the end surface of the second magnetic core body 120 in the first direction X can be fixed to the two second side walls 114. The accommodating groove 111 forms an installation position that is open only in the third direction Z, and the pins of the coil extend out of the installation position along the third direction Z.

[0077] In other embodiments, the magnetic core 100 includes a first magnetic core sub-body 110 and a second magnetic core sub-body 120, and the first magnetic core sub-body 110 and the second magnetic core sub-body 120 are each provided with multiple and one-to-one correspondence. The first magnetic core sub-body 110 and the second magnetic core sub-body 120 are mirror-imaged in the first direction X, and the first magnetic core sub-body 110 and the second magnetic core sub-body 120 are cross-arranged along the first direction X. The first magnetic core sub-body 110 and the second magnetic core sub-body 120 are both provided with a receiving groove 111, and the receiving groove 111 is only formed on one side end surface in the first direction X. When the first magnetic core sub-body 110 and the second magnetic core sub-body 120 arranged opposite to it are fixed, the receiving grooves 111 of the two are spliced ​​into an installation position, and the first magnetic core sub-body 110 and the second magnetic core sub-body 120 arranged opposite to it do not form an installation position. That is, a first magnetic core sub-body 110 and a second magnetic core sub-body 120 , and a coil sandwiched therebetween, form a single-phase TLVR inductor 1 , and multiple single-phase TLVR inductors 1 are fixed in the first direction X and connected via connectors 400 to form a multi-phase TLVR inductor.

[0078] Optionally, a center column 112 is provided in the installation position, the secondary coil 300 is arranged in a C-shape outside the center column 112, the second input pin 310 and the second output pin 320 are bent toward the center line of the center column 112, and the primary coil 200 is arranged in a "X" shape outside the secondary coil 300, and the first input pin 210 and the first output pin 220 are bent toward the side away from the center line of the center column 112.

[0079] For example, in this embodiment, the secondary coil 300 and the primary coil 200 are mounted on the same center column 112. By making the bending directions of the pins of different-level coils in the same installation position different, the spacing between the pins of different-level coils is increased to avoid electrical connection.

[0080] An electrical device is also provided, comprising a circuit board and the above-mentioned multi-phase TLVR inductor, wherein the circuit board is provided with a power supply circuit, and the pins of the multi-phase TLVR inductor that are not connected through the connector 400 are welded to the power supply circuit.

[0081] Furthermore, the above are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions are possible for those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. Multi-phase TLVR inductor, characterized by: include: N single-phase TLVR inductors (1), N≥2, each of the single-phase TLVR inductors (1) comprising a magnetic core (100), and a primary coil (200) and a secondary coil (300) mounted on the magnetic core (100), wherein the secondary coil (300) is capable of forming a mutual inductance coil group by mutual induction with the primary coil (200); A connecting member (400), wherein the secondary coils (300) of the N single-phase TLVR inductors (1) are electrically connected via the connecting member (400).

2. The multi-phase TLVR inductor according to claim 1, characterized in that: The primary coil (200) and the secondary coil (300) each include two pins; all the pins are located at the same end of the magnetic core (100) in the third direction (Z).

3. The multi-phase TLVR inductor according to claim 2, characterized in that: The two pins of the primary coil (200) are located on opposite sides of the magnetic core (100) in the second direction (Y), and the two pins of the secondary coil (300) are located on opposite sides of the magnetic core (100) in the first direction (X); or, the four pins are distributed in sequence along the second direction (Y); The first direction (X), the second direction (Y) and the third direction (Z) are perpendicular to each other.

4. The multi-phase TLVR inductor according to claim 2, characterized in that: Each of the primary coil (200) and the secondary coil (300) further comprises a coil body connected to the two pins, the coil body of the secondary coil (300) is located inside the coil body of the primary coil (200), and a first insulating layer is provided on the surface of the coil body of the primary coil (200) and / or the surface of the coil body of the secondary coil (300).

5. The multi-phase TLVR inductor according to claim 4, characterized in that: The coil body of the primary coil (200) and the coil body of the secondary coil (300) are fixed by bonding.

6. The multi-phase TLVR inductor according to claim 4, characterized in that: The primary coil (200) and the magnetic core (100) are fixed by bonding, and / or the secondary coil (300) and the magnetic core (100) are fixed by bonding.

7. The multi-phase TLVR inductor according to claim 2, characterized in that: The connector (400) and the pin are fixed by any one of laser welding, ultrasonic welding, solder paste welding, and riveting.

8. The multi-phase TLVR inductor according to claim 1, characterized in that: The magnetic cores (100) of two adjacent single-phase TLVR inductors (1) are fixed by bonding.

9. The multi-phase TLVR inductor according to claim 1, characterized in that: The end surface of the magnetic core (100) used for contacting the circuit board is provided with a second insulating layer.

10. An electrical device, characterized in that It comprises a circuit board and the multi-phase TLVR inductor according to any one of claims 2 to 7, wherein the circuit board is provided with a power supply circuit, and the pins of the multi-phase TLVR inductor that are not connected through the connector (400) are welded to the power supply circuit.

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