Common mode inductance is around the same core in the same number of turns, wire diameter equal to the opposite to the two sets of coils. A differential mode inductor is a coil wound around an iron core.
common mode choke coil is characterized by: the same core on the two sets of coils around the opposite, so the core is not afraid of saturation. The largest core material used in the market is high-conductivity ferrite material.
differential mode choke coil are characterized by high current applications. As a coil around a core, when the power flow into the coil increases, the core of the coil will be saturated, so the market with the most core material is metal powder core material. Especially iron core material (due to cheap).
Difference between Common Mode Inductance and Differential Mode Inductance
The design of the power filter can usually be considered from both common mode and differential mode. Common mode filter is the most important part of the common mode choke, compared with the differential mode choke, common mode choke is a significant advantage of its high inductance, and the volume is small, the design common mode choke An important issue to consider when designing a flow loop is its leakage inductance, which is the differential mode inductance. Typically, the leakage inductance is calculated assuming that it is 1% of the common mode inductance, in fact, the leakage inductance is between 0.5% and 4% of the common mode inductance. The influence of this error may not be negligible in designing the optimal performance choke.
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