The common mode choke is an important part of anti-electromagnetic interference, which can provide very high impedance at a broadband condition. The main part of most of EMI filters is the common mode choke. Two winding turns of common mode choke are the same, producing equal flux in opposite direction. These two fluxes offset each other and bring the magnetic core in an unbiased state.
Switch power, UPS uninterruptible power, transducer, EMC filter, inverter welding machine, wind power, photovoltaic inverter, air conditioner, copier, medical equipment, etc.