Power Electronics Tutorial
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Solved Example
AC to DC Converters Solved Example
A single-phase AC voltage converter has the following details −
ON time = 6 min, OFF time = 4 min, frequency = 50Hz, and
Voltage source Vo = 110V
Calculate the following.
Triggering angle α
Solution −
$T=2 imes left ( T_{ON}+T_{OFF} ight )$ but $f=50Hz,$ $T=2 imes left ( 6+4 ight )=20mins$
$360^{circ}=20min,$ $1min=18^{circ}$
Therefore, $T_{OFF}=4min$
Then,
$$alpha =frac{4}{0.1} imes 1.8=72^{circ}$$Voltage Output
Solution −
$$V_{0}=left ( V_{S} imes D ight ),quad where quad D=frac{T_{ON}}{T_{ON}+T_{OFF}}=frac{6}{10}=0.6$$ $$T_{ON}=6min,quad T_{OFF}=4 min,quad V_{S}=110V$$ $$V_{0}left ( Voltage Output ight )=V_{S} imes D=110 imes 0.6=66Volts$$ Advertisements