The structure of the integrated molded inductor is mainly composed of a seat body and a winding body. The winding body is buried in the metal magnetic powder and die-casted. There are two types of products: plug-in type and SMD patch type. The SMD pin is the lead pin of the winding body directly formed on the surface of the seat body. The utility model has higher inductance and smaller leakage inductance than traditional inductors. The structure of the integrated molded inductor is an SMD structure design. The characteristics of the integrated molded inductor manufacturing process allow it to not damage the inductor during use, and improve production efficiency. Because the structure of the integrated molded inductor still maintains excellent temperature rise current and saturation current under high temperature and high frequency environment, and has full magnetic shielding performance, it has been widely used in the fields of computers, communications, consumption, industry and automotive electronics.
The integrated molded inductor is more reliable than traditional power inductors and NR inductors. The integrated molded inductor of the same size has a larger working current, and its fully shielded structure also has a better magnetic shielding effect. Since the integrated molded inductor is a die-casting process, its magnetic core is in close contact with the coil, which can prevent the coil from moving under the action of the magnetic field and generating noise. The maximum operating frequency of traditional power inductors is generally around 100KHz, while the maximum operating frequency of NR inductors is only around 1MHz, but the operating frequency of one-piece molded inductors can reach 5MHz. Its operating frequency is much higher than that of traditional power inductors. In terms of production technology, one-piece molded inductors are fully automatically produced by equipment, with high product stability and consistency, and are very suitable for use in high-reliability products.
The characteristics and applications of one-piece molded inductors are mainly: its magnetic glue coating structure, SMD surface mount inductor. The one-piece molding structure can avoid noise and can greatly reduce the buzzing sound. The fully enclosed structure has a good magnetic shielding effect and can effectively reduce electromagnetic interference. The same size DC impedance is low, which can ensure that the current resistance inductance value drops smoothly. The general application frequency can reach 5MHz, which is suitable for reflow soldering SMT process. The product is lead-free and complies with the RoHS directive. It is suitable for DC-to-DC rectification applications on power lines in power supplies, personal computers and other handheld electronic devices, and is suitable for automotive, medical, aerospace and other industries with high reliability requirements. The current of the inductor of the same size is 30% higher than that of the traditional inductor. Low side and small size can save a lot of space. Large current saves more power, and maintains excellent temperature rise current and saturation current characteristics in high-frequency and high-temperature environments.
The development and application of one-piece molded inductors mainly arise from: the CPU main frequency is getting higher and higher, so there are high requirements for stable power supply and filtering. One-piece molded inductors solve this problem. It can work for a long time under high current conditions and can provide stable power supply for the CPU. In addition, the inductor also has the function of filtering. Secondly, good material properties and special design make the inductor structure more stable and the impedance lower, so it has higher efficiency. The development of power supply technology has also promoted the development of inductors: industrial power supplies, military power supplies, etc. As the size of electronic products becomes smaller and the power becomes larger, electronic components are also developing towards small size and high power.
With the development of the inductor industry, manufacturing technology and R&D technology are constantly improving, and the structural advantages of molded inductors are more prominent. One-piece molded inductors are new inductor products that have been updated and replaced. They have a wider range of uses and have been recognized by the market.
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