6
PFC circuit
The PFC is finished by the DSP and the process is shown in the above dashed frame.
Firstly the hardware configuration sends signals that the DSP needs to the DSP to
process it, and then the DSP sends a group of pulse signals to drive the IGBT on and
off. Thus the current and voltage of the input utility power will be in the same phase
and the power factor is nearly 1.
3.4. Inverter circuit
Half-bridge inverter topology
The input of the half-bridge inverter topology is DC voltage, and the output is AC
voltage.
Half-bridge topology major advantage is that it subjects their transistors on the off
state to a voltage stress equal to the DC input voltage and not twice that as do the
push-pull and singled forward converter. An additional valuable feature of the
