Ferrite core capable of reducing loss

Abstract

The invention relates to the field of ferrite magnetic cores, and discloses a ferrite magnetic core capable of reducing loss, which comprises a semicircular magnetic core, fixing structures are arranged at the top and the bottom of the magnetic core, a coil winding is wound on the surface of the magnetic core, each fixing structure comprises a rotating block, a sliding block is arranged on one side of each rotating block, and the sliding block is arranged on the other side of each rotating block. The ferrite core capable of reducing the loss comprises two magnetic cores, sliding blocks are arranged on the two sides of each magnetic core, sliding grooves are formed in the tops and the bottoms of the two sides of each magnetic core, the sliding grooves are matched with the sliding blocks, and the two magnetic cores can be clamped and fixed through rotation of the rotating blocks. The rotation of the rotating block is completed through the cooperation of the linkage block and the rotation, so that a user can quickly split a round ferrite magnetic core into two semicircular ferrite magnetic cores, and winding of a coil winding can be more quickly completed through a winding machine during production.

Description

Technical Field

[0001] The invention relates to the technical field of ferrite cores, in particular to a ferrite core capable of reducing loss. Background Art

[0002] In the patent application with application announcement number CN102709029A, it includes a circular center column and a square frame, a U-shaped opening is set on one side of the square frame, and the circular center column is located in the U-shaped opening. The advantages are: the magnetic core adopts a three-dimensional structure of a circular center column, and the winding is completely wrapped except for the end in contact with the PCB board, with good shielding performance. At the same time, the cross-section of the wound coil is circular, making the winding of the coil easier; this unique shape minimizes the influence of the air gap formed on the contact surface when the two magnetic cores are assembled, and provides a greater ratio of volume to total space utilization.

[0003] In the prior art including the above-mentioned patents, the ferrite core will increase its loss at high temperature due to the change of parameters such as magnetic permeability and saturation magnetization. The loss of the ferrite core mainly includes hysteresis loss and eddy current loss. Hysteresis loss is the energy loss caused by overcoming friction during the magnetization process of the core, while eddy current loss is the energy loss caused by eddy currents in the core. Both losses will increase with the increase of temperature. It is necessary to reduce the temperature of the core by heat dissipation, which can effectively reduce the change of these parameters and thus reduce the core loss. In addition, when the ferrite core is produced and damaged, the coil winding needs to be removed. The coil winding on the circular closed ferrite core is very difficult to remove and takes a long time. Summary of the invention

[0004] The problem to be solved by the present invention is that the coil winding on the ferrite core is inconvenient to wind and the core is worn out too quickly at high temperature, affecting the service life.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: a ferrite core capable of reducing loss, the core is semicircular, the top and bottom of the core are both provided with fixed structures, the surface of the core is wound with coil windings, both sides of the core are equidistantly provided with a plurality of limit grooves in a circular array, the opening of the limit groove is smaller than the internal cavity, a heat dissipation hole is connected between the opposite sides of the two limit grooves, the inner diameter of the heat dissipation hole is smaller than the internal cavity of the limit groove, and the top and bottom of the heat dissipation hole are both provided with auxiliary holes; The fixing structure comprises a rotating block, a sliding block is provided on one side of the rotating block, sliding grooves are provided on the top and bottom of both sides of the magnetic core, the sliding grooves are adapted to the sliding blocks, and the two magnetic cores can be fixed by rotating the rotating block.

[0006] Preferably, the rotating block can rotate along the sliding groove through a sliding block, and positioning grooves are provided on the top and bottom of the front side of the magnetic core.

[0007] Preferably, a linkage block is provided on one side of the rotating block, and the linkage block is meshed with the rotating block.

[0008] Preferably, a movable rod is slidably penetrated through the front side of the linkage block, and fixed plates are fixedly provided on both sides of the movable rod.

[0009] Preferably, fixing pins are fixedly provided on both sides of the back side of the fixing plate, and the fixing pins are matched with the positioning grooves.

[0010] Compared with the prior art, the technical solution of the present invention has the following advantages: (1) A fixed structure is provided on the magnetic core, and the fixed structure can dock and lock the magnetic core through two rotating rotating blocks. The rotation of the rotating block is completed by the coordinated rotation of the linkage block, which allows the user to quickly split a circular ferrite core into two semicircular ferrite cores. When winding the coil winding in production, it can be completed more quickly through the winding machine. Compared with manual interlaced winding, it is faster and more convenient, and the rotating cross lock is more secure and will not affect the normal operation of the magnetic core when in use. Two fixing pins are also provided on the body of the linkage block. The fixing pins can cooperate with the magnetic force of the magnetic core to firmly fix in the positioning groove to prevent the linkage block from loosening when the magnetic core is in use; (2) The magnetic core is also provided with a limit groove, a heat dissipation hole and an auxiliary hole. The limit groove is used to position the coil after the coil is wound to avoid the accumulation of the coil and the instability of heat accumulation. A conical cavity is provided inside the limit groove. The limit groove is composed of two inner and outer limit grooves and is interconnected through the heat dissipation hole. The airflow generated when the machine is running will enter from the auxiliary hole and then be discharged from the limit groove through the heat dissipation hole or from the auxiliary hole on the other side to cool the magnetic core by air flow. When the machine is used for a long time and the airflow becomes hot, the aperture of the heat dissipation hole is smaller than the limit groove. The smaller the aperture, the faster the flow rate, and the higher the temperature of the airflow. Then, the magnetic core body and the coil winding wound on the limit groove can be cooled. Double cooling can reduce the high temperature loss of the magnetic core. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a front view schematic diagram of the magnetic core structure of the present invention; Figure 3 It is an exploded schematic diagram of the magnetic core structure of the present invention; Figure 4 It is a schematic diagram of the limiting groove structure of the present invention; Figure 5It is a schematic cross-sectional view of the magnetic core structure of the present invention; Figure 6 This is a schematic diagram of the auxiliary hole structure of the present invention; Figure 7 It is a schematic diagram of the linkage block structure of the present invention; Figure 8 It is a schematic diagram of the rotating block structure of the present invention.

[0012] In the figure: 1. coil winding; 2. magnetic core; 3. fixed structure; 301. fixed plate; 302. rotating block; 303. slider; 304. linkage block; 305. slide groove; 306. movable rod; 307. fixing pin; 4. auxiliary hole; 5. limiting groove; 6. heat dissipation hole. DETAILED DESCRIPTION

[0013] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0014] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. "Include" or "comprise" and other similar words used in the present disclosure mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and other similar words are not limited to physical or mechanical connections, but may also include electrical connections, whether direct or indirect. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0015] like Figures 1 to 8 As shown, a ferrite core capable of reducing loss provided by the present invention comprises a semicircular core 2, a fixing structure 3 is arranged on the top and bottom of the core 2, a coil winding 1 is wound on the surface of the core 2, a plurality of limiting grooves 5 are equidistantly arranged in a circular array on both sides of the core 2, the opening of the limiting groove 5 is smaller than the internal cavity, a heat dissipation hole 6 is connected between opposite sides of the two limiting grooves 5, the inner diameter of the heat dissipation hole 6 is smaller than the internal cavity of the limiting groove 5, and auxiliary holes 4 are arranged on the top and bottom of the heat dissipation hole 6, Figure 5 The magnetic core 2 is cut into pieces, and the positional relationship between the heat dissipation hole 6 and the limiting groove 5 can be clearly seen. The heat dissipation hole 6 is located inside the magnetic core 2; The fixing structure 3 includes a rotating block 302 , a slider 303 is provided on one side of the rotating block 302 , and grooves 305 are provided on the top and bottom of both sides of the magnetic core 2 , and the grooves 305 are adapted to the slider 303 , and the two magnetic cores 2 can be fixed by rotating the rotating block 302 .

[0016] The rotating block 302 can rotate along the sliding groove 305 through the sliding block 303 , and positioning grooves are provided on the top and bottom of the front side of the magnetic core 2 .

[0017] A linkage block 304 is provided on one side of the rotating block 302 , and the linkage block 304 is meshed with the rotating block 302 .

[0018] A movable rod 306 is slidably penetrated through the front side of the linkage block 304 , and fixed plates 301 are fixedly arranged on both sides of the movable rod 306 .

[0019] Fixing pins 307 are fixedly provided on both sides of the back side of the fixing plate 301 , and the fixing pins 307 are matched with the positioning grooves.

[0020] The working principle and use process of the present invention are as follows: when producing the magnetic core 2, the coil winding 1 needs to be wound on its surface. When winding, the split magnetic core 2 can cooperate with the machine to speed up the production efficiency. When winding, the coil winding 1 needs to be aligned on the limit groove 5. After winding, the two magnetic cores 2 can be aligned. After alignment, the rotating blocks 302 at the top and bottom of the two magnetic cores 2 will be meshed with each other, and then the linkage block 304 will be inserted into the tooth grooves after the two rotating blocks 302 are meshed. After being inserted, the fixed plate 301 can be rotated. The fixed plate 301 will drive the linkage block 304 to rotate through the movable rod 306. The linkage block 304 drives the two rotating blocks 302 to rotate. The rotating block 302 will drive the slider 303 to rotate along the slide groove 305. After rotating 90°, the two rotating blocks 302 will be clamped together. At this time, the movable rod 306 is slid and pushed into the linkage block 304. At this time, the two fixing pins 307 on the back of the fixing plate 301 will be magnetically fixed to the positioning grooves opened on the surface of the magnetic core 2 to further fix the two magnetic cores 2, thereby preventing the magnetic core 2 from loosening during operation and increasing stability. After the magnetic core 2 is installed in the machine for use, as the operating temperature of the machine gradually rises, the airflow generated by the operation of the machine will enter the limiting groove 5 from the auxiliary hole 4, and will be blown out from the other limiting groove 5 and the auxiliary hole 4 through the heat dissipation hole 6. Since the heat dissipation hole 6 is small and slender, the flow rate can be increased to cool down the high-temperature airflow. The fast-flowing airflow can reduce the heat of the magnetic core 2 body, and the blown airflow can also cool down the coil winding 1. Double cooling reduces the high-temperature loss of the magnetic core 2.

[0021] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A ferrite core capable of reducing losses, comprising a magnetic core (2), characterized in that: The magnetic core (2) is semicircular in shape, and a fixing structure (3) is provided at the top and bottom of the magnetic core (2). A coil winding (1) is wound around the surface of the magnetic core (2). A plurality of limiting grooves (5) are equidistantly provided on both sides of the magnetic core (2) in a circular array, and the opening of the limiting grooves (5) is smaller than the internal cavity. A heat dissipation hole (6) is connected between the opposite sides of the two limiting grooves (5), and the inner diameter of the heat dissipation hole (6) is smaller than the internal cavity of the limiting groove (5). Auxiliary holes (4) are provided at the top and bottom of the heat dissipation hole (6); The fixing structure (3) comprises a rotating block (302), a sliding block (303) is provided on one side of the rotating block (302), sliding grooves (305) are provided on the top and bottom of both sides of the magnetic core (2), the sliding grooves (305) are adapted to the sliding blocks (303), and the two magnetic cores (2) can be fixed by rotating the rotating block (302) to be clamped.

2. A ferrite core with reduced loss according to claim 1, characterized in that: The rotating block (302) can rotate along the sliding groove (305) via the sliding block (303), and positioning grooves are provided at the top and bottom of the front side of the magnetic core (2).

3. A ferrite core with reduced loss according to claim 2, characterized in that: A linkage block (304) is provided on one side of the rotating block (302), and the linkage block (304) is meshed with the rotating block (302).

4. A ferrite core capable of reducing loss according to claim 3, characterized in that: A movable rod (306) is slidably penetrated through the front side of the linkage block (304), and fixed plates (301) are fixedly arranged on both sides of the movable rod (306).

5. The ferrite core with reduced loss according to claim 4, characterized in that: Fixing pins (307) are fixedly provided on both sides of the back side of the fixing plate (301), and the fixing pins (307) are matched with the positioning grooves.

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