Common-mode choke design considerations applied to domestic induction heating

In this work, a design calculation method for common-mode chokes (CMC) is presented. With this purpose, a similar method to that employed in a typical inductor design where the input current characteristics define both the maximum magnetic flux and the winding losses has been adapted. In order to get a suitable design that provides a CMC optimization, considerations with regard to both current components, the common-mode (CM) and the differential-mode (DM) current, have been taken into account. Therefore, the CM current contributes to the magnetic flux in the core, which is associated to the core saturation and core losses, whereas the DM current generates the copper losses. Finally, a CMC for domestic induction heating appliances is designed.