Question

For the second quadrant operation of type E chopper

(a) Only CH2 is on

(b) CH1 and CH2 is on

(c) CH2 and CH3 is on

(d) CH2 and CH4 is on

I have been asked this question in quiz.

I'd like to ask this question from Type E Choppers-1 topic in portion Choppers of Power Electronics

Answer 1

The correct answer is (d) CH2 and CH4 is on

Explanation: With CH2 on, negative current flows through L, CH2, CH3 and CH4. When CH2 is turned off, current is fed back to the diodes by D1 and D4. Load voltage is positive and current is negative, hence second current operation is operated.