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In the single phase voltage controller circuit shown in the figure given below, for what range of triggering angle (α), the output voltage (v0) is not controllable?
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- 0° < α < 45°
- 45° < α < 135°
- 90° < α < 180°
- 135° < α < 180°
Correct Option: A
R + jXL = (50 + j 50) Ω
| ∴ tan φ = | = | = | = 1 | |||
| R | R | 50 |
⇒ φ = 45°
Hence firing angle α must be greater than 45° Thus for 0 < α < 45°, VO is uncontrollable.
