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In order to reduce the power loss of the common mode choke coil during high frequency tasks, the designer must be familiar with the characters that the windings play in the loss and the appropriate choice for reducing this loss. These options include the ability to obtain inductor tasks in large ripple currents with high power levels often used to reduce the loss of the metal foil winding process used. Designers have found the best inductor design with the Litz line, which is a new thing for the design process. This kind of thing promises to use the optimized number of wires and the placement of the winding position within the appropriate skeleton window to avoid some molding process.

The inductor used as a switched-mode power supply is susceptible to high-frequency ripple currents, and high frequencies can cause large resistance values ​​for useful windings. Thus, we can think of the large copper loss in the windings. The winding resistance of the switching power supply inductor is composed of two parts, including the DC resistance value and the skin effect and the proximity effect (AC) resistance value. The power loss in any magnetic device is the sum of the losses that occur in these effects. For this reason, the design of the magnetic device becomes more difficult due to the mutual influence between these effects. For example, some common approaches to reduce AC losses, such as the use of the Litz line, can greatly reduce the cross-sectional area of ​​the conductor, but also dramatically increase the dc resistance value. Copper foil winding inductors are often used to minimize winding losses in places where large DC current is used, due to the use of favorable windings in the windings window. However, even a small number of AC current can cause great loss in these copper foil rings by common mode choke manufacturers .

As the copper foil winding can be applied to the window and the occurrence of DC resistance is very small, so the copper foil winding is often forced to use. Reference 1 leads to the development of copper foil winding forming techniques with minimal copper loss and alternating copper loss. The copper foil formed with this new technique is distributed at the air gap adjacent to the current across the air gap of the air gap, and the skin effect and the near effect are minimized. The use of forming copper foil winding technology to create the inductor like Leeds wire winding has a small AC resistance, both copper foil winding the same small DC resistance. In practice, forming copper foil winding technology for high current, large ripple inductors, can minimize the loss of the winding.

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