Current-compensated chokes can be manufactured with different ferrite geometries; toroidal ring core and ribbed core are the best known. Different core materials enable their use in various frequency ranges. A very well-known component, but one not designed as a common mode choke, is the snap ferrite or the split ferrite sleeve.
WE-LHMD is a SMT-mountable storage choke from Würth Elektronik optimized for filter topologies in Class-D amplifiers. Thanks to their iron powder cores, the high-current inductors for audio applications (available in 1008 and 1213 packages) display stable behavior at high peak currents.
EMC noise is a common issue related to use of electrical drives. The following article published by Electronics Weekly written by Christofer Kronschnabl and Wolfgang Ernst of Panasonic discuss use of capacitors and inductors to suppress these effects.
Würth Elektronik introduces its WE-HIDA series of high-current inductor storage choke for audio amplifiers
With WE-HIDA, Würth Elektronik offers a storage choke optimized for Class D amplifiers. The high current inductor is characterized by low core losses, very low DC resistances from 2.5 mΩ to 14.8 mΩ and high saturation currents.
These chokes are available in three sizes with current handling capacities between 10 A and 17 A, and with a rated voltage of 250 V AC (50/60 Hz). Depending on the type, the inductance value is between 1.0 mH and 6.25 mH. The plastic material of the base plate and spacer in the middle of the ring core conforms with UL 94 V-0, and the highest CTI value of >600.
Panasonic released an application note on its low-loss power inductor (choke) within the fuel-injection solenoid circuit of an ECU featuring small size, ruggedness, and specifications tailored to the high-ripple-current dc-dc converter.