The role of series inductors
The inductor is connected in series in a circuit to play a role in smoothing the current, in addition to energy storage. Of course, inductors in series in the circuit should be divided into what circuit, if the series in the AC circuit, inductors mainly play a current limiting role, if the rectifier circuit, it mainly plays a filtering role, the characteristics of the inductor is to pass DC, AC resistance, the reason for the storage, is that in the circuit, the current is large, the inductor hinder the current change, the electrical energy will be stored, the current is small, the inductor will release the electrical energy, friends see Some books on rectifier and filter circuits will understand.
Series inductance calculation formula
As shown in the figure on the right, n inductors are connected in series, and similar to the method described earlier, the equivalent inductance can be calculated as:
Because the magnetic field generated by the inductor will be coupled with the winding coil of its adjacent inductor, it is difficult to avoid the interaction between the adjacent inductors. Physical mutual inductance M can give a measure of this impact.
The equivalent mutual inductance Leq of a series circuit composed of two inductors with inductance L1 and L2 and mutual inductance m is:
1)Assuming that the magnetic field or magnetic flux generated by two inductors have the same direction, it is called “parallel mutual assistance”, which is expressed by equation,
2