engineering recuitment GATE EE 2023-24 Test Series Power Electronics and Drives Choppers Step Down Choppers
A step-down chopper has an input voltage 250 V and the output voltage is 187.5 V. If the conduction time of the thyristor chopper is 150 μ sec. Now if the frequency is increased by 30% keeping the conduction time of thyristor current, then which of the following is/are true?
1
Time period = 153.85 μsec
2
Output voltage = 243.75 V
3
TOFF is 50 μsec
4
Frequency of operation is 5 kHz