High-power PFC inductor

Abstract

The utility model discloses a high-power PFC (Power Factor Correction) inductor, which relates to the field of PFC inductor structures and comprises a base, a magnetic core is vertically arranged on the base, coils are wound on two sides of the magnetic core, two ends of each coil are connected with pins, a plurality of pins are arranged at the bottom of the base, a mounting groove is arranged at the top of the base, and the bottom of the magnetic core is inserted into the mounting groove. A fixing device is arranged between the magnetic core and the inner wall of the mounting groove; according to the high-power PFC inductor, the fixing device is arranged between the base and the magnetic core, the problems that the contact area between the magnetic core and the base is small, and stability is poor can be effectively solved, and meanwhile excellent heat dissipation performance is kept.

Description

Technical Field

[0001] The utility model relates to the field of PFC inductor structure, in particular to a high-power PFC inductor. Background Art

[0002] High-power PFC inductors are inductors used in power factor correction (PFC) circuits. Their main function is to improve the power factor of the AC power supply, reduce harmonic pollution on the power grid, and improve energy utilization.

[0003] Since the high-power PFC inductor has a large power, it generates a lot of heat during operation. Therefore, it is necessary to enhance the heat dissipation effect of the high-power PFC inductor to avoid the influence of high temperature on the working performance of the high-power PFC inductor.

[0004] In the prior art, the magnetic core is arranged vertically to reduce the shielding of the fixing base on the magnetic core and the coil, increase the contact area between the magnetic core, the coil and the air, and thus improve the heat dissipation effect of the high-power PFC inductor.

[0005] However, with this setting, the contact area between the magnetic core and the base is reduced, and the center of gravity of the magnetic core is raised. The magnetic core is only fixed on the base through the welding connection between the coil and the pins. The single connection structure makes the stability of the high-power PFC inductor poor. Utility Model Content

[0006] The purpose of the utility model is to provide a high-power PFC inductor. The high-power PFC inductor is provided with a fixing device between the base and the magnetic core, which can effectively solve the problems of small contact area and poor stability between the magnetic core and the base, while maintaining excellent heat dissipation performance.

[0007] The above-mentioned optimized structure of the utility model is realized through the following technical scheme: a high-power PFC inductor, including a base, a magnetic core is vertically arranged on the base, coils are wound on both sides of the magnetic core, pins are connected at both ends of the coil, and multiple pins are arranged at the bottom of the base, a mounting groove is arranged on the top of the base, the bottom of the magnetic core is inserted into the mounting groove, and a fixing device is arranged between the magnetic core and the inner wall of the mounting groove.

[0008] In some embodiments, the fixing device includes at least two symmetrically arranged plug-in units, the plug-in units are arranged on the inner wall of the installation groove, the magnetic core is provided with a plug-in groove on one side close to the plug-in unit, and the plug-in unit is plugged into and matched with the plug-in groove.

[0009] In some embodiments, the plug-in unit includes a fixed plate, which is fixed on the inner wall of the mounting slot. A rotating groove is provided on the side of the fixed plate close to the magnetic core. A fixing rod is provided between the inner walls at both ends of the rotating groove. A rotating plate is sleeved on the fixed rod. The rotating plate is plugged into the plug-in slot, and torsion springs are provided between both ends of the rotating plate and the fixed rod.

[0010] In some embodiments, a limiting plate is provided on the top of one side of the fixed plate close to the magnetic core, and an end surface of the limiting plate and a center line of the rotating plate are located on the same vertical plane.

[0011] In some embodiments, the plug-in unit is disposed obliquely and forms an angle of 35°-65° with the vertical plane.

[0012] In some embodiments, a limiting groove is provided at the bottom of the installation groove, and the shape and size of the limiting groove are compatible with the shape and size of the bottom of the magnetic core.

[0013] In some embodiments, a support plate is provided in the limiting groove, the support plate is provided between the bottom of the limiting groove and the bottom of the magnetic core, and a return spring is provided between the bottom of the limiting groove and the support plate.

[0014] In some embodiments, the two coils are disposed above the mounting slot.

[0015] In summary, the utility model has the following beneficial effects:

[0016] This type of high-power PFC inductor has a fixing device between the base and the magnetic core. Through the plug-in cooperation between the plug-in unit and the plug-in slot, the high-power PFC inductor is stably fixed, so that the magnetic core can remain stable when subjected to vibration or impact, thereby improving the reliability and service life of the product while maintaining excellent heat dissipation performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Figure 2 It is a top view of the utility model;

[0019] Figure 3 It is a cross-sectional view along the AA line of the present invention;

[0020] Figure 4 It is an enlarged view of B of the utility model;

[0021] Figure 5 This is a structural diagram of a magnetic core wound with a coil according to the utility model;

[0022] Figure 6This is a structural diagram of the utility model without the coil and the magnetic core.

[0023] In the figure: 1, base; 11, mounting slot; 2, magnetic core; 21, plug-in slot; 3, coil; 4, pin; 5, fixing device; 51, fixing plate; 52, fixing rod; 53, rotating plate. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] refer to Figure 1-6 A high-power PFC inductor includes a base 1, which can be made of a material with good insulation performance, such as plastic or ceramic, to ensure that the inductor will not be disturbed by an external electric field or magnetic field during operation. A magnetic core 2 is vertically arranged on the base 1, and a coil 3 is wound on both sides of the magnetic core 2. The winding method and number of turns of the coil 3 can be adjusted according to the specific inductance value and application scenario. Pins 4 are connected to both ends of the coil 3, and multiple pins 4 are arranged at the bottom of the base 1. The pins 4 can be fixed to the bottom of the base 1 by welding or other fixing methods to connect with an external circuit; four pins 4 can be respectively arranged at the midpoints of the four sides of the base 1, which is convenient for welding between the two ends of the coil 2 and the pins 4. A mounting groove 11 is arranged on the top of the base 1, and the bottom of the magnetic core 2 is inserted in the mounting groove 11. A fixing device 5 is arranged between the magnetic core 2 and the inner wall of the mounting groove 11, which can realize the stable fixation between the magnetic core 2 and the base 1.

[0026] In some embodiments, the fixing device 5 includes at least two symmetrically arranged plug-in units, which are arranged on the inner wall of the installation groove 11 and can be arranged in the center to improve the uniformity of the force on the magnetic core 2. The magnetic core 2 is provided with a plug-in groove 21 on the side close to the plug-in unit. The plug-in unit includes a fixing plate 51, which is fixed on the inner wall of the installation groove 11. The fixing plate 51 can be fixed on the inner wall of the installation groove 11 by screws or other fixing methods. The fixing plate 51 and the base can be integrally formed, and the fixing plate 51 is provided with a rotating groove on the side close to the magnetic core 2. A fixing rod 52 is provided between the inner walls at both ends of the rotating groove, and a rotating plate 53 is sleeved on the fixing rod 52. The rotating plate 53 is plugged into and matched with the plug-in groove 21. Torsion springs are provided between both ends of the rotating plate 53 and the fixing rod 52. When the magnetic core 2 is placed downward, the magnetic core 2 presses the rotating plate 53, so that the rotating plate 53 rotates downward on the fixing rod. When the rotating plate 53 contacts the plug-in groove 21, the torsion spring drives the rotating plate 53 to rotate in the opposite direction, so that the rotating plate 53 is plugged into and matched with the plug-in groove 21, thereby realizing the fixation of the magnetic core 2 by the fixing device 5.

[0027] In some embodiments, a limiting plate is provided on the top of the fixed plate 51 close to the magnetic core 2. The end face of the limiting plate and the center line of the rotating plate 53 are located on the same vertical plane, which can limit the reverse rotation of the rotating plate 53 and avoid failure of the plug-in unit to limit the magnetic core 2.

[0028] In some embodiments, the plug-in unit may be disposed obliquely and may form an angle of 35°-65° with the vertical plane, so as to decompose the vertical force applied by the magnetic core 2 to the plug-in unit and enhance the fixing effect of the plug-in unit on the magnetic core 2.

[0029] In some embodiments, a limit groove is provided at the bottom of the installation groove 11, and the shape and size of the limit groove are compatible with the shape and size of the bottom of the magnetic core 2 to ensure that the magnetic core 2 can be stably inserted into the installation groove 11. A support plate is provided in the limit groove, and the support plate is provided between the bottom of the limit groove and the bottom of the magnetic core 2. A reset spring is provided between the bottom of the limit groove and the support plate. When the plug-in unit is plugged into the plug-in slot 21, the plug-in unit and the plug-in slot 21 can be plugged into place through the action of the reset spring, thereby ensuring the fixing effect of the plug-in unit on the magnetic core 2; at the same time, when the magnetic core 2 is vibrated or impacted, the reset spring can absorb part of the energy to further improve the stability.

[0030] In some embodiments, the two coils 3 are both disposed above the mounting slot 11 , so that there is no shielding around the coils 3 , thereby maximizing the heat dissipation area of ​​the coils 3 and ensuring the heat dissipation effect.

[0031] The specific working principle is as follows:

[0032] When the magnetic core 2 wound with two coils 3 is inserted into the installation slot 11, the magnetic core 2 presses the rotating plate 53, causing the rotating plate 53 to rotate downward on the fixing rod. When the rotating plate 53 contacts the plug-in slot 21, the torsion spring drives the rotating plate 53 to rotate in the opposite direction, so that the rotating plate 53 and the plug-in slot 21 are plugged in and matched, thereby achieving the initial fixation between the magnetic core 2 and the base 1. In this process, the bottom of the magnetic core 2 first presses the support plate downward to cause the reset spring to elastically deform. When the rotating plate 53 contacts the plug-in slot 21, the force acting on the magnetic core 2 is released. The magnetic core 2 moves upward through the action of the reset spring, achieving a full plug-in fit between the rotating plate 53 and the plug-in slot 21, and under the action of the limit plate, the rotating plate 53 is prevented from rotating in the opposite direction, thereby achieving further fixation of the magnetic core 2.

[0033] Then, the two end wires of the two coils 3 and the corresponding pins 4 are welded, and after cooling, the entire high-power PFC inductor is completed.

[0034] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-power PFC inductor, comprising a base (1), a magnetic core (2) being vertically arranged on the base (1), a coil (3) being wound around both sides of the magnetic core (2), pins (4) being connected to both ends of the coil (3), and a plurality of pins (4) being arranged at the bottom of the base (1), characterized in that: The top of the base (1) is provided with a mounting groove (11), the bottom of the magnetic core (2) is inserted into the mounting groove (11), and a fixing device (5) is provided between the magnetic core (2) and the inner wall of the mounting groove (11).

2. A high-power PFC inductor according to claim 1, characterized in that: The fixing device (5) comprises at least two symmetrically arranged plug-in units, the plug-in units being arranged on the inner wall of the installation slot (11), the magnetic core (2) being provided with a plug-in slot (21) on one side close to the plug-in unit, the plug-in unit being pluggably engaged with the plug-in slot (21).

3. A high-power PFC inductor according to claim 2, characterized in that: The plug-in unit comprises a fixed plate (51), the fixed plate (51) being fixed on the inner wall of the mounting groove (11), a rotating groove being provided on a side of the fixed plate (51) close to the magnetic core (2), a fixed rod (52) being provided between the inner walls at both ends of the rotating groove, a rotating plate (53) being sleeved on the fixed rod (52), the rotating plate (53) being plugged into and matched with the plug-in groove (21), and a torsion spring being provided between both ends of the rotating plate (53) and the fixed rod (52).

4. The high-power PFC inductor according to claim 3, characterized in that: A limiting plate is provided on the top of the fixed plate (51) on one side close to the magnetic core (2), and the end surface of the limiting plate and the center line of the rotating plate (53) are located on the same vertical plane.

5. The high-power PFC inductor according to claim 2, characterized in that: The plug-in unit is arranged obliquely and forms an angle of 35°-65° with the vertical plane.

6. The high-power PFC inductor according to claim 1, characterized in that: A limiting groove is provided at the bottom of the installation groove (11), and the shape and size of the limiting groove are compatible with the shape and size of the bottom of the magnetic core (2).

7. The high-power PFC inductor according to claim 6, characterized in that: A support plate is provided in the limiting groove, the support plate is provided between the bottom of the limiting groove and the bottom of the magnetic core (2), and a return spring is provided between the bottom of the limiting groove and the support plate.

8. The high-power PFC inductor according to claim 1, characterized in that: The two coils (3) are both arranged above the mounting groove (11).

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