MCQs of AC-DC Converters (Power Electronics - 3140915)

Power Electronics (3140915) MCQs

MCQs of AC-DC Converters

Showing 101 to 107 out of 107 Questions

101.

In circulating current type of dual converter, the nature of voltage across reactor is

(a)	alternating
(b)	pulsating
(c)	direct
(d)	triangular

102.

Output voltage expression of 1-phase full converter

(a)	$\frac{3 V_{m}}{2 π} (1 + \cos α)$
(b)	$\frac{2 V_{m}}{π} (\cos α)$
(c)	$\frac{V_{m}}{π} (1 + \cos α)$
(d)	$\frac{3 \sqrt{3} V_{m}}{2 π} (\cos α)$

103.

Output voltage expression of 1-phase semiconverter

(a)	$\frac{3 V_{m}}{2 π} (1 + \cos α)$
(b)	$\frac{2 V_{m}}{π} (\cos α)$
(c)	$\frac{V_{m}}{π} (1 + \cos α)$
(d)	$\frac{3 \sqrt{3} V_{m}}{2 π} (\cos α)$

104.

Output voltage expression of 3-phase half-wave converter

(a)	$\frac{3 V_{m}}{2 π} (1 + \cos α)$
(b)	$\frac{2 V_{m}}{π} (\cos α)$
(c)	$\frac{V_{m}}{π} (1 + \cos α)$
(d)	$\frac{3 \sqrt{3} V_{m}}{2 π} (\cos α)$

105.

Output voltage expression of 3-phase semiconverter

(a)	$\frac{3 V_{m}}{2 π} (1 + \cos α)$
(b)	$\frac{2 V_{m}}{π} (\cos α)$
(c)	$\frac{V_{m}}{π} (1 + \cos α)$
(d)	$\frac{3 \sqrt{3} V_{m}}{2 π} (\cos α)$

106.

A 3-phase full converter can function as (i) converter for α= 0° to 180° (ii) converter for α= 0° to 90° (iii) inverter for α= 90° to 180° (iv) inverter for α = 0° to 90°

(a)	(i), (iii)
(b)	(ii), (iii)
(c)	(ii), (iv)
(d)	(i), (iv)

107.

In a dual converter, converters 1 and 2 work as under : (i) 1 as rectifier, 2 as inverter (ii) 1 as inverter, 2 as rectifier (iii) both as rectifiers (iv) both as inverters

(a)	(i), (ii)
(b)	(ii) only
(c)	(iv) only
(d)	(iii) only

Showing 101 to 107 out of 107 Questions