Common-mode and differential-mode integrated inductor

Abstract

The common-mode and differential-mode integrated inductor comprises an installation plate, a magnetic core and two coils, a detachable fixing frame is arranged at the bottom end of the installation plate, the front end and the rear end of the fixing frame are warped upwards, the installation plate and the magnetic core are both clamped on the inner side of the fixing frame, four pins are fixedly arranged at the bottom end of the installation plate, and the two coils are arranged on the installation plate. Four supporting pieces are arranged at the bottom end of the fixing frame, each supporting piece comprises a supporting rod fixedly arranged at the bottom end of the fixing frame, the length of the supporting rods is larger than that of the pins, the supporting rods are made of plastic, and annular fracture grooves are formed in the outer ends of the supporting rods. The four supporting pieces are arranged below the fixing frame, the supporting rods with the length larger than that of the pins are used for supporting the inductor and blocking objects close to the inductor from the lower portion, the probability that the pins make contact with other objects and are stressed to deform is reduced, and the phenomenon that normal use of the inductor is affected due to pin deformation is avoided.

Description

Technical Field

[0001] This utility model relates to the field of inductor technology, specifically to a common-differential mode integrated inductor. Background Technology

[0002] An inductor is an energy storage element used in circuits. It can convert electrical energy in the circuit into magnetic energy and generate a magnetic field. This magnetic field impedes alternating current in the circuit and allows direct current to pass through smoothly, thereby enabling the circuit to filter and oscillate.

[0003] There are many types of inductors, among which the common-mode and differential-mode integrated inductor is a special type of inductor, mainly used in three-phase power systems. By combining the functions of common-mode and differential-mode inductors, it achieves common-mode suppression and differential-mode measurement of three-phase current.

[0004] Common-differential mode integrated inductors are generally composed of a magnetic core, coil, pins and other structures, such as a common-differential mode integrated inductor with publication number CN219759361U in the prior art;

[0005] In the structure of a common-mode integrated inductor, the pins are generally located at the bottom of the inductor, made of metal, and have a relatively slender shape. Before use, the pins are exposed without any protective measures, making them very easy to bend due to external forces and affect the normal use of the inductor. Utility Model Content

[0006] The purpose of this invention is to provide a common-mode integrated inductor. The inductor is supported by a support rod that is longer than the pins and blocks objects from approaching it from below. This reduces the probability of the pins being deformed due to contact with other objects, thus preventing pin deformation from affecting the normal use of the inductor.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a common-differential mode integrated inductor, comprising a mounting plate, a magnetic core and two coils, wherein the bottom end of the mounting plate is provided with a detachable fixing frame, the front and rear ends of the fixing frame are upturned, and the mounting plate and the magnetic core are both locked inside the fixing frame;

[0008] The mounting plate is fixedly provided with four pins at the bottom end, and the fixing frame is provided with four support members at the bottom end. The support members include support rods fixedly provided at the bottom end of the fixing frame, and the length of the support rods is greater than the length of the pins.

[0009] The support rod is made of plastic, and an annular fracture groove is provided at the outer end of the support rod, which is close to the connection between the support rod and the fixing frame.

[0010] Furthermore, the magnetic core is located on the top of the mounting plate, and the front and rear sides of the magnetic core are detachably connected to the two upturned parts at the front and rear of the fixing frame, respectively. Both coils are sleeved on the outer end of the magnetic core, and the two coils are symmetrically arranged on the left and right sides.

[0011] Furthermore, two fastening components are provided on both sides of the mounting plate. Each fastening component includes a fixing plate fixedly disposed on the outer end of the mounting plate, and a spring is fixedly disposed on the side of the fixing plate away from the mounting plate.

[0012] Furthermore, a mounting head is fixedly provided at the end of the spring away from the fixing plate, and a through hole is provided on the mounting head;

[0013] The two ends of the coil are respectively connected to two mounting heads on the corresponding side. The coil passes through the mounting head through a through hole, and one end of the coil can be fixed to the mounting head with solder.

[0014] Furthermore, the pin includes a winding post fixedly disposed at the bottom end of the mounting plate, and the bottom end of the winding post is fixedly provided with the pin body. The coil is wound around the outer end of the winding post after being connected to the fastening assembly.

[0015] Furthermore, an annular partition is fixedly provided at the outer end of the winding post, the annular partition separating the winding post from the needle body, and the winding part of the coil is located above the annular partition.

[0016] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0017] 1. By setting four support members below the fixed frame, the inductor is supported by support rods longer than the pins and objects approaching the inductor from below are blocked, reducing the probability of the pins being deformed due to contact with other objects, and avoiding the deformation of the pins from affecting the normal use of the inductor.

[0018] 2. The main body of the metal wire is wound around the magnetic core to form a coil. The unwound metal wires at both ends of the coil are tightened by the fastening assembly to ensure that the coil is in a tight state. After the metal wire is passed through the fastening assembly, it is fixed to the pin. The tension of the metal wire on the pin is greatly reduced, preventing the tension of the metal wire from bending and deforming the pin. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0020] Figure 1 This is a top view of the structure of this utility model;

[0021] Figure 2 This is a bottom view of the structure of this utility model;

[0022] Figure 3 This is a structural diagram of the fastening component of this utility model;

[0023] Figure 4 This is a diagram of the pin structure of this utility model;

[0024] Figure 5 This is a structural diagram of the support component of this utility model.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Mounting plate; 2. Magnetic core; 3. Coil; 4. Fixing bracket; 5. Support component; 501. Support rod; 502. Annular fracture groove; 6. Fastening assembly; 601. Fixing plate; 602. Spring; 603. Mounting head; 604. Through hole; 7. Pin; 701. Pin body; 702. Winding post; 703. Annular partition. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0028] This utility model provides, for example Figure 1-5 The common-mode integrated inductor shown includes a mounting plate 1, a magnetic core 2 and two coils 3. The bottom end of the mounting plate 1 is provided with a detachable fixing frame 4. The front and rear ends of the fixing frame 4 are upturned. The mounting plate 1 and the magnetic core 2 are both stuck inside the fixing frame 4.

[0029] The magnetic core 2 is located on the top of the mounting plate 1. The front and rear sides of the magnetic core 2 are detachably connected to the two upturned parts of the fixing frame 4. The two coils 3 are both sleeved on the outer end of the magnetic core 2, and the two coils 3 are symmetrically arranged on the left and right sides.

[0030] First, insert the mounting plate 1 downwards into the inside of the fixing frame 4, connecting the mounting plate 1 and the fixing frame 4 into a whole. Then, initially wind the coil 3 around the outer end of the magnetic core 2, and then place the magnetic core 2 above the mounting plate 1 and insert it into the fixing frame 4 to connect with the fixing frame 4. The mounting plate 1, magnetic core 2, coil 3, and fixing frame 4 constitute the main body of the common-differential mode integrated inductor.

[0031] To prevent pin 7 from bending or deforming due to stress, such as Figure 1 , 2 As shown in Figure 5, the bottom end of the mounting plate 1 is fixedly provided with four pins 7, and the bottom end of the fixing frame 4 is provided with four support members 5. The support member 5 includes a support rod 501 fixedly provided at the bottom end of the fixing frame 4. The length of the support rod 501 is greater than the length of the pins 7.

[0032] The support rod 501 is made of plastic, and an annular fracture groove 502 is provided at the outer end of the support rod 501. The annular fracture groove 502 is close to the connection between the support rod 501 and the fixing frame 4.

[0033] Four support members 5 are set at the bottom of the mounting bracket 4. The main body of the support member 5 is a support rod 501 made of plastic. Since the length of the support rod 501 is greater than the length of the pin 7, if the inductor is placed on the table before use, the bottom of the support rod 501 will contact the table and support the inductor as a whole, so that the pin 7 is suspended and not under force. When an object approaches the inductor from below, the support rod 501 will contact the object first, effectively preventing the pin 7 from contacting the object. In this way, the probability of the pin 7 being deformed due to contact with other objects is reduced, and the deformation of the pin 7 is prevented from affecting the normal use of the inductor.

[0034] The function of the annular fracture groove 502 is that when the inductor needs to be installed on the circuit board for use, the support rod 501 can be broken off from the annular fracture groove 502 by external force. After the support rod 501 is broken, it no longer plays a blocking role and will not interfere with the normal use of pin 7.

[0035] To keep coil 3 taut, such as Figure 1-3 As shown, two fastening components 6 are provided on both sides of the mounting plate 1. The fastening component 6 includes a fixing piece 601 fixedly disposed on the outer end of the mounting plate 1, and a spring 602 is fixedly disposed on the side of the fixing piece 601 away from the mounting plate 1.

[0036] The spring 602 is fixedly provided with a mounting head 603 at one end away from the fixing plate 601, and a through hole 604 is provided on the mounting head 603;

[0037] The two ends of the coil 3 are respectively connected to two mounting heads 603 on the corresponding side. The coil 3 passes through the mounting head 603 through the through hole 604, and one end of the coil 3 can be fixed to the mounting head 603 by soldering.

[0038] The main body of the metal wire is regularly wound around the outer end of the magnetic core 2 to form a coil 3. The unwound metal wires at both ends of the coil 3 need to be connected to the pins 7. Before connecting the metal wires to the pins 7, the metal wires are first connected and fixed to the fastening assembly 6. When connecting, the spring 602 is bent upwards, and then the metal wire is pulled taut and passed through the through hole 604 and the mounting head 603. Solder is then applied to the through hole 604 to weld and fix the metal wires to the mounting head 603. After the solder solidifies, the spring 602 is released. Under the action of the elastic force, the spring 602 rebounds downwards and drives the mounting head 603. The elastic force acts on the metal wires, thereby tightening the metal wires at both ends of the coil 3 and keeping the coil 3 in a taut state.

[0039] To further reduce the stress on pin 7, such as Figure 1 , 2 As shown in Figure 4, the pin 7 includes a winding post 702 fixedly disposed at the bottom end of the mounting plate 1. The bottom end of the winding post 702 is fixedly provided with a pin body 701. After the coil 3 is connected to the fastening assembly 6, it is wound around the outer end of the winding post 702.

[0040] An annular partition 703 is fixedly provided at the outer end of the winding post 702. The annular partition 703 separates the winding post 702 from the needle body 701. The winding part of the coil 3 is located above the annular partition 703. The needle body 701, the winding post 702 and the annular partition 703 are all made of metal.

[0041] After the metal wire passes through and is welded to the fastening assembly 6, it is wound and fixed to the outer end of the winding post 702. The annular partition 703 separates the wound part from the needle body 701. The cross-sectional diameter of the winding post 702 is larger than that of the needle body 701, making it thicker. It is located at the root of the needle 7 and is not easily bent or deformed by the tension of the metal wire. Furthermore, the metal wire has been pressed and fixed by the fastening assembly 6 before being wound and fixed at the needle 7. Therefore, the tension of the metal wire on the needle 7 is greatly reduced, ensuring that the coil 3 is tightly wound on the magnetic core 2, while avoiding the tension of the metal wire from bending and deforming the needle 7.

[0042] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A common-mode integrated inductor, comprising a mounting plate (1), a magnetic core (2), and two coils (3), characterized in that: The mounting plate (1) has a detachable fixing frame (4) at its bottom end, and the fixing frame (4) is upturned at both the front and rear ends; The mounting plate (1) is fixedly provided with four pins (7) at the bottom end, and the fixing frame (4) is provided with four support members (5) at the bottom end. The support member (5) includes a support rod (501) fixedly provided at the bottom end of the fixing frame (4). The length of the support rod (501) is greater than the length of the pins (7). The support rod (501) is made of plastic, and an annular fracture groove (502) is provided at the outer end of the support rod (501).

2. The common-mode integrated inductor according to claim 1, characterized in that: The magnetic core (2) is located on the top of the mounting plate (1). The front and rear sides of the magnetic core (2) are detachably connected to the front and rear upturned parts of the fixing frame (4). The two coils (3) are both sleeved on the outer end of the magnetic core (2).

3. The common-mode integrated inductor according to claim 1, characterized in that: Two fastening components (6) are provided on both sides of the mounting plate (1). The fastening components (6) include a fixing piece (601) fixedly disposed on the outer end of the mounting plate (1). A spring (602) is fixedly disposed on the side of the fixing piece (601) away from the mounting plate (1).

4. The common-mode integrated inductor according to claim 3, characterized in that: The spring (602) is fixedly provided with a mounting head (603) at one end away from the fixing plate (601), and a through hole (604) is provided on the mounting head (603); The two ends of the coil (3) are respectively connected to two mounting heads (603) on the corresponding side.

5. The common-mode integrated inductor according to claim 4, characterized in that: The pin (7) includes a winding post (702) fixedly disposed at the bottom of the mounting plate (1). The bottom end of the winding post (702) is fixedly provided with a pin body (701). The coil (3) is wound around the outer end of the winding post (702) after being connected to the fastening assembly (6).

6. The common-mode integrated inductor according to claim 5, characterized in that: An annular partition (703) is fixedly provided at the outer end of the winding post (702), and the annular partition (703) separates the winding post (702) from the pin body (701).

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