1
GATE EE 2006
+2
-0.6
A voltage commutated chopper operating at $$1$$ $$kHz$$ is used to control the speed of $$dc$$ motor as shown in figure. The load current is assumed to be constant at $$10$$ $$A.$$ The average output voltage of the chopper will be

A
$$70$$ $$V$$
B
$$47.5$$
C
$$35$$ $$V$$
D
$$0$$
2
GATE EE 2006
+2
-0.6
A voltage commutated chopper operating at $$1$$ $$kHz$$ is used to control the speed of $$dc$$ motor as shown in figure. The load current is assumed to be constant at $$10$$ $$A.$$ The minimum time in $$\mu$$ sec for which the $$SCR$$ $$M$$ should be ON is

A
$$280$$
B
$$140$$
C
$$70$$
D
$$0$$
3
GATE EE 2006
+2
-0.6
A voltage commutation circuit is shown in figure. If the turn off time of the $$SCR$$$$s$$ is $$50$$ $$\mu \sec$$ and as safety margin of $$2$$ is considered, what will be the approximate minimum value of capacitor required for proper commutation? A
$$2.88\,\,\mu \,F\,$$
B
$$1.44\,\,\mu \,F\,$$
C
$$0.91\,\,\mu \,F\,$$
D
$$0.72\,\,\mu \,F\,$$
4
GATE EE 2005
+2
-0.6
The given figure shows a step $$-$$ down chopper switched at $$1$$ $$KHz$$ with a duty ratio $$D = 0.5.$$ The peak - peak ripple in the load current is close to A
$$10$$ $$A$$
B
$$0.5$$ $$A$$
C
$$0.125$$ $$A$$
D
$$0.25$$ $$A$$
GATE EE Subjects
Electromagnetic Fields
Signals and Systems
Engineering Mathematics
General Aptitude
Power Electronics
Power System Analysis
Analog Electronics
Control Systems
Digital Electronics
Electrical Machines
Electric Circuits
Electrical and Electronics Measurement
EXAM MAP
Joint Entrance Examination