Finally, the maximal voltages of these components
can also be solved according to Table I, the calculations
show that S and Da need to handle a possible
peak voltage 506 V, D2 needs to handle the dc-link
voltage 133 V, and D1 needs to handle the maximal
input voltage 373 V.
According to the calculation, the component selection and
the photograph of the prototype are given in Fig. 8. A simple
voltage feedback loop based on UC3842 is used and a simple PI
controller is designed to obtain the desired 19 V output voltage.