Snubber circuit, switched-mode power supply as well as of the saturable inductor

摘要

A snubber circuit has a saturable inductor formed out of amorphous alloy and others connected in series to the driver of a switching element. A switching power-supply is either of a flyback self-excited type or of a separately excited type, and is provided with a saturable inductor connected in series between a switching element connected in series to the primary coil of a transformer and a driving circuit which operates this switching element. This saturable inductor enhances the efficiency and suppresses noises, and is used for the above-mentioned snubber circuit and switching power-supply. The exciting current Iex is less than 3(A), and the magnetic flux Ζ (Wb/m2) is within 2 to 20 % of the product of the operation cycle T(sec) by the circuit voltage E(V).