Molded Power Choke Inductor are also called common-mode inductors. They are widely used in computer switching power supplies and internals. Their anti-noise and EMI filtering functions are used to suppress the electromagnetic waves generated by high-speed signal lines from radiating radiation. Next, Yite Electronics will give a detailed explanation on common mode inductors, starting from its design considerations and performance characteristics today.
According to the requirements of the cmolded Power Choke Inductor's rated current, DC resistance, and impedance value at a specific frequency, the design is generally carried out from the following aspects.
1. According to the impedance, first calculate the minimum inductance value that requires common mode inductance.
2. Select the appropriate core material and core size.
3. Determine the number of turns of the coil according to the parameters.
4. According to different requirements, such as temperature and cost performance, select the appropriate wire.
The performance characteristics of Molded Power Choke Inductors are as follows:
1). High permeability: The permeability of common mode inductors is 5-15 times that of ferrite, so it has greater insertion loss and has a greater suppression effect on conducted interference than ferrite.
2). High saturation magnetic induction: it is not easy to be magnetized to saturation in the case of strong current interference in the circuit.
3). Excellent temperature stability: In the case of large temperature fluctuations, the performance change rate is lower than that of ferrite, with excellent stability, and the performance change tends to be linear.
Regarding the content of common-mode inductors in terms of design considerations and performance characteristics, there are many items to pay attention to when designing inductors, such as temperature, size, material, and so on. The editor of Yite Electronics will talk about the working principle of common-mode inductors and the industry fields of its application in detail.
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