1.
The input voltage with resistive load of a single phase half wave controlled rectifier is 400 sin 314t. For the firing angle of 60°, the average output voltage is __________.
A
(\frac{300}{\pi})
B
(\frac{200}{\pi})
C
(\frac{100}{\pi})
D
(\frac{400}{\pi})
Answer and explanation
Correct Answer: A — \(\frac{300}{\pi}\)
The average output voltage of a single-phase half-wave controlled rectifier is (V_{o(avg)} = \frac{V_m}{2\pi}(1 + \cos\alpha)). With (V_m = 400) V and (\alpha = 60°): (V_{o(avg)} = \frac{400}{2\pi}(1 + \cos 60°) = \frac{400}{2\pi} \times 1.5 = \frac{300}{\pi}).