Choke coil.

摘要

Two coils 3, 3 are wound over the piled portions of a first magnetic core possessing two closed magnetic circuits and a second magnetic core. The winding directions of the two coils are so set that the magnetomotive forces generated by the both coils may cancel each other in the second magnetic core. The magnetic fluxes flowing in the first magnetic core decrease the higher harmonics of the input current of the power source circuit, while the magnetic fluxes flowing in the second magnetic core 2 decrease the noise between the line and the ground. That is, the choke coil of the invention possesses the function of choke coil and the function of noise filter at the same time.