Question

For the first quadrant operation of type E chopper

(a) Only CH1 is on

(b) CH1 and CH2 is on

(c) CH1 and CH3 is on

(d) CH1 and CH4 is on

This question was addressed to me in quiz.

I need to ask this question from Type E Choppers-1 topic in chapter Choppers of Power Electronics

Answer 1

Right answer is (d) CH1 and CH4 is on

Easiest explanation: With CH1 and CH4 on, load voltage = Vs and load current flows. Both V and I are positive giving Ist quadrant operation.