Storage Choke : Direct current flows through the choke, with delta-shaped alternating current superposed. The frequency of this alternating current can be twice the switching frequency, depending on the topology of the Switched Mode Power Supply.
Resonant Circuit Choke : An alternating current of same frequency as that of the switching frequency flows in these inductors.
Pulse Choke : High current flows in a short time through the choke, depending upon the duty cycle of the operating frequency. For rest of the time the choke is in de-energized condition.
PFC Choke : In these chokes the current flowing is up to twice the frequency of mains supply in-put. In addition a high-frequency alternating current is super imposed on it.
Non Linear Chokes : The inductance curve of these chokes depends upon the amount of current flowing through it. These are stepped air gap or transducer choke.
Chokes for EMI/EMC Application : These chokes are used at the input of a SMPS to filter common and differential mode noise generated due to switching circuits of the power supply.
Tuned Circuit Inductors: Tuned Circuit Inductors chokes are used in a series or parallel tuned circuit to select a frequency for further processing
The core materials normally used are: