Question

A single-phase full converter is delivering a constant load current. When converter has firing angle of ${35}^{\circ }$ and the overlap angle of $4^{\circ }$, then value of inductive voltage regulation will be

Answer 1

Using relation,

$cos\alpha -cos(\alpha +\mu )=constant$ ...$\left(1\right)$

$\alpha ={35}^{\circ },\mu =4^{\circ }$

$K=cos{35}^{\circ }-cos(35+4^{\circ })=0.042$

At $\alpha =0^{\circ }$

Let, $\mu ={\mu }_0$

$K=cos{0}^{\circ }-cos(0^{\circ }+{\mu }_0)$

$0.042=1-cos{\mu }_0$

$\cos {\mu }_0=0.958$

${\mu }_0={16.66}^{\circ }$

Inductive voltage regulation
= $\frac{1-cos{\mu }_0}{2}=0.0209$