Forward converter circuit has many advantages, first of
all, its topological structure simple and, secondly, its input
and output is electrical isolation; and, finally, multi-channel
output, it can. Based on the above advantages, in small and
medium power forward converter circuit has been very
widely used in the power supply. Conventional switching
power supplies is the root cause of low power factor
rectifier filter capacitor to the output voltage of the circuit
after smoothing, but makes the input current spikes.
Therefore, power factor correction circuit and rectifier filter
capacitor is the core ideas separated by controlling the
means to input impedance characteristics of rectifier circuit
by capacitance becomes a purely resistive