Toroidal Inductors 22uh 47uh

Toroidal Inductors 22uh 47uh

Selecting the element values of a common-mode filter does not require a very complicated process. A relatively simple and intuitive design process can be achieved using standard filter arrangements, although these arrangements may be modified to use pre-defined component values.

Line filters prevent excessive noise between the electronics and the AC line; In general, the focus is on AC line protection. The use of a common-mode filter between an AC line (via a full impedance matching circuit) and a (noise) power converter. Common-mode noise (noise generated on both grounded lines at the same time) moves from the load end into the filter, so that the noise shared by both lines is greatly attenuated. Finally, the output of the filter added to the AC line (via the full impedance matching circuit) is negligible.

Two identical differential filters must be designed to design common-mode filters. Each filter corresponds to the circuit of the two poles, and the sensor on each side is coupled to a magnetic core.

For A differential input current (the input from A to B is along L1, and the input from B to A is along L2), the coupled net magnetic flux between the two sensors is 0.

Any self-induction caused by differential signals is caused by poor coupling of the two filters. The filter operates as an independent element, and its leakage sensing responds to the differential signal: the leakage sensing attenuates the differential signal.

When sensors L1 and L2 receive the same signal from the same grounded electrode, they both produce a non-zero net flux in the shared magnetic core. The two sensors then operate as independent components, and their common self-induction responds to the common differential signal: the common self-induction attenuates the common differential signal.