Method for realizing thin, light and small secondary side of CI-shaped closing and separating type transformer, namely example description of method for realizing thin, light and small secondary side of CI-shaped closing and separating type transformer
Through the thin and light design of the CI-shaped and integrated fractional transformer and automatic charging control, the electromagnetic radiation and manual plug-in problems of the charging equipment are solved, achieving efficient and convenient wireless charging.
Patent Information
- Application Number
- CN202410005048.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-03
- Publication Date
- 2025-07-04
AI Technical Summary
Existing rechargeable power tools and equipment have electromagnetic radiation problems, and socket-type products need to be manually operated and are susceptible to dust, which cannot meet users' convenient charging needs.
The CI-shaped and integrated fractional transformer is adopted. The secondary edge core uses high-quality materials with high magnetic permeability and low iron loss. It is designed as a thin and light structure. It is heat-dissipated through air cooling and combined with automatic charging control ports to achieve a charging method without manual plugging.
Effectively reduce electromagnetic radiation, improve charging efficiency and convenience, reduce manual operations, and improve user experience.
Smart Images
Figure CN120261128A_ABST
Abstract
Description
Technical Field
[0001] The present invention is a method for realizing a thin, light and small secondary side of a CI-shaped split transformer and an illustrative example, belonging to the field of electronic technology.
[0002] There are some "abbreviations" in the claims of the present invention and in this specification. For convenience, they are explained as follows: a. The meaning of "CI-shaped split transformer" is: the front view of the iron core or magnetic core of the primary side of the split transformer is in a horizontal "c" shape, and the front view of the iron core or magnetic core of the secondary side is in a horizontal "I" shape. b. "Transformer core" is an abbreviation of "transformer iron core or magnetic core". c. The meaning of "thin, light and small secondary side" is: for the split transformer secondary side core of the same product applying the technology of the present invention, compared with the primary side core, it has the characteristics of being thin, light and small. Specifically: ① The "thickness of the secondary side core" < 30% of the "total thickness of the primary side core", ② The "weight of the secondary side core" < 35% of the "weight of the primary side core", ③ The "volume of the secondary side core" < 40% of the "volume of the primary side core". In addition, due to the different placement directions of the transformer (upright, horizontal, vertical, etc.) and the different cognitions and habits of each observer, its "thickness" can also be referred to as "height" or "width". Background Art
[0003] There are many users of rechargeable devices in China, such as rechargeable electric tools, rechargeable spot welders, rechargeable soldering irons, rechargeable electric vehicles, rechargeable portable heating and cooling control products, mobile phones, and iPads, etc., and they often need to be charged. Many users have quite high requirements for the convenience of charging such devices. For this reason, some scientific and technological workers have developed air-core coil wireless charging devices and magnetic adsorption charging interfaces, which have brought convenience to many users. However, the former has disadvantages such as electromagnetic radiation, and the maximum charging current of the latter is limited. And traditional jack-type products have problems such as the jack being affected by dust and the need for manual operation for plugging and unplugging, and the increase in contact resistance may be caused by many operation times.
[0004] The present invention and the related patents of "split transformer" previously applied by the applicant provide an innovative technical basis for solving the above problems. That is, by using these invention methods, the electromagnetic radiation can be greatly reduced to a negligible level, medium and high power charging can be achieved, and manual operation of "inserting the plug into the jack or inserting the jack into the plug" is not required. Summary of the Invention
[0005] The content of the present invention is as follows: A method for achieving a thin, light, and small secondary side in a CI-shaped split-type transformer and an illustrative example thereof. The secondary side of the split-type transformer core can be made of high-quality magnetic conductive material with a magnetic permeability μ > 10,000 under the working condition of 100 kHz and an iron loss ≤ 100 W / kg to form an "I"-shaped secondary core and a "c"-shaped primary core. The secondary core is characterized by being thin, light, and small relative to the primary core. Specifically: ① The "thickness of the secondary core" < 30% of the "total thickness of the primary core", ② The "weight of the secondary core" < 35% of the "weight of the primary core", ③ The "volume of the secondary core" < 40% of the "volume of the primary core". The secondary main winding and the primary main winding can each be wound with enameled copper flat wire or enameled aluminum flat wire that can be directly soldered. When the secondary side and the primary side are closed for operation, there is a wind with a speed > 5 m per second blowing towards the secondary winding and the secondary core for heat dissipation. Positive significance
[0006] The present invention and the related patents of the "split-type transformer" previously applied for by the present inventor provide an innovative method for numerous rechargeable devices. Compared with the air-core coil type wireless charging devices or magnetic adsorption type charging devices sold on the current market, by applying the innovative methods of these inventions, the electromagnetic radiation caused by charging can be significantly reduced to negligible levels, and the charging power and power utilization efficiency can be significantly improved. Compared with the socket-type products previously sold on the market, manual operations such as "inserting the plug into the socket or inserting the socket into the plug" are not required during charging, which is convenient for users and saves time. Therefore, promoting the application of the innovative methods of these inventions is of great significance. Description of the drawings
[0007] The following is an example to illustrate the feasibility of the present invention in combination with each drawing.
[0008] Figure 1 A front view of an implementable example of the "CI-shaped split-type transformer core with a thin, light, and small secondary side and winding" of the present invention is described. In the figure, ① represents its secondary iron core, ② represents its secondary winding wire package, ③ represents its primary iron core; ④ represents its primary winding wire package. In addition, the lead wires of each winding wire package, the cooling fan, and the winding skeleton are omitted and not drawn in the figure.
[0009] Figures 2 to 4 It is a diagram of an innovative manufacturing example of the "CI-shaped split-type transformer core with a thin, light, and small secondary side and winding" of the present invention. Manufacturing Figure 1 In the first step of the rectangular basic iron cores of the secondary iron core shown in ① and the primary iron core shown in ③ in the manufacturing process: Use nm crystal thin strips to wind into rectangular basic iron cores, as Figure 2 shown. Figure 2 (a) is its front view (the rear view is similar), Figure 2 (b) is its top view (the bottom view is similar), Figure 2 (c) is its left view (the right view is similar),
[0010] Manufacture Figure 1 The second step of the secondary core shown in ① and the primary core shown in ③ is: Figure 2 Proper cutting of the rectangular base core shown in (a) can obtain Figure 1 The horizontally lying "C"-shaped primary core shown in ③ and Figure 1 The horizontally lying "I"-shaped secondary core shown in ①.
[0011] Figure 3 Describes the horizontally lying "I"-shaped secondary core described above. Figure 3 (a) is its bottom view, 3(b) is its front view (the rear view is similar), Figure 3 (c) is its top view, Figure 3 (d) is its left view (the right view is similar), Figure 3 (e) is Figure 3 A schematic diagram of cutting or grinding the four corners of the "I"-shaped secondary core shown in (d) into a circular arc. In this way, it is beneficial for winding, but there is a certain processing difficulty and it may increase the processing cost.
[0012] Figure 4 Describes the horizontally lying "C"-shaped primary core described above. Figure 4 (a) is its bottom view, Figure 4 (b) is its front view (the rear view is similar), Figure 4 (c) is its top view, Figure 4 (d) is its left view (the right view is similar), Figure 4 (e) is Figure 4 The sectional view of A-A' of (b). In this way, it is beneficial for winding, but there is a certain processing difficulty and it may increase the processing cost. Specific embodiments The following gives an example of a specific embodiment directly related to the present invention.
[0013] For the cutting of the base core described above, high-pressure precision water jet machining is preferably used; Figure 3 (e) and Figure 4 The circular arcs shown in (e) can be cut or ground into a circular arc with a high-speed grinding wheel in cold water at 3°C to 8°C.
[0014] Figure 1 The secondary wire package and the primary wire package described in can be wound with "good conductor enameled wire that can be directly soldered" on an injection molding skeleton that is resistant to 150°C high temperature and has a high enough withstand voltage insulation strength (for example, insulation strength ≥ 1000V). If the primary winding is externally connected to a power supply or the output voltage of the secondary winding is relatively high, then during winding, an insulating film resistant to 150°C high temperature (for example, single-layer insulation strength ≥ 500V) needs to be padded between layers.
[0015] The wire of the primary side main winding can be wound with enameled aluminum flat wire (when the wire coil is wound, special aluminum solder for welding is required during welding) to help reduce the cost of the winding.
[0016] Wound with nm crystal thin tape Figure 2 When winding the rectangular base iron core as shown, an adhesive resistant to high temperature of 150 °C needs to be sprayed between layers to help the wound rectangular base iron core solidify into a whole.
[0017] h in each figure 21 -h 43 , L 21 -L 45 and W 21 -W 41 The specific values of the dimensions of can each be selected within the range of 2 mm to 300 mm. The following specifically illustrates with examples for Figures 2 to 4 each dimension shown.
[0018] Figure 2 In, h 21 = h 23 = 12 mm, h 22 = 11 mm, L 21 = L 23 = 12 mm, L 22 = 55 mm, L 24 = 79 mm, W 21 = 25 mm.
[0019] Figure 3 In, h 31 = 6 mm, L 31 = L 33 = 3 mm, L 32 = 39 mm, L 34 = 45 mm, W 31 = 25 mm.
[0020] Figure 4 In, h 41 = h 43 = 12 mm, h 42 = 11 mm; L 41 = 75 mm, L 42 = 47 mm, L 43 = 41 mm, L 44 = 55 mm, L 45 = 14 mm, W 41 = 25 mm.
[0021] Figure 3 (e) and Figure 4 The arc radius in (e) can be taken as 3 mm.
[0022] According to the above data, through calculation, it can be known that the thickness of the secondary core < 18% of the total thickness of the primary core, the weight of the secondary core < 22% of the weight of the primary core, and the volume of the secondary core < 21% of the volume of the primary core.
[0023] The main control circuit of the related products of the present invention needs to have a charging control terminal CDK. When the related device needs to be charged and is placed at a predetermined position, the main control circuit will automatically detect whether the related device meets the charging requirements through the CDK terminal. If the requirements are met, the CDK terminal will output a valid level for starting charging, and the charging circuit and the cooling fan will start working. If the charging is full, the level of the CDK terminal will become an invalid state, and both the charging circuit and the cooling fan will stop working accordingly.
Claims
1. A method for realizing a thin, light and small secondary side of a CI-shaped combined split transformer and an illustrative example, characterized in that: For the secondary side of the CI-shaped combined split transformer core, high-quality magnetic conductive materials with a magnetic permeability μ > 10,000 under the working condition of 100 kHz and an iron loss ≤ 100 W / kg can be selected to make the "l"-shaped secondary core and the "c"-shaped primary core; compared with the primary core, the secondary core has the characteristics of being thin, light and small. Specifically: ① the "thickness of the secondary core" < 30% of the "total thickness of the primary core", ② the "weight of the secondary core" < 35% of the "weight of the primary core", ③ the "volume of the secondary core" < 40% of the "volume of the primary core". The secondary main winding and the primary main winding can each be wound with enameled rectangular copper wire or enameled rectangular aluminum wire that can be directly soldered; when the secondary side and the primary side are closed for operation, there is a wind with a speed > 5 m per second blowing towards the secondary winding and the secondary core for heat dissipation.