NEW
New Website Launch
Experience the best way to solve previous year questions with mock tests (very detailed analysis), bookmark your favourite questions, practice etc...
1

### GATE EE 2000

Subjective
A $$dc$$ motor with armature resistance $${R_a}$$ is fed from a step down chopper in the continuous mode, and operates at some known speed and known excitation current. The motor current rises from $${I_{\min }}\,\,$$ to $${I_{\max }}\,\,$$ in the $${T_{on}}$$ period Ton of the chopper; and drops from $${I_{\max }}\,\,$$ to $${I_{\min }}\,\,$$ in the $${T_{off}}$$ period Toff of the same circuit. Both the rise and fall of the current may be assumed to be approximately linear. What is the average power loss in the machine armature?

Average power loss $$= {\left( {{{{{\rm I}_{\max }} + {{\rm I}_{\min }}} \over 2}} \right)^2}\,\,{R_a}$$
Write for Us

Do you want to write for us? Help us by contributing to our platform.

#### Questions Asked from Choppers and Commutation Techniques

On those following papers in Marks 5
Number in Brackets after Paper Indicates No. of Questions
GATE EE 2002 (1)
GATE EE 2001 (1)
GATE EE 2000 (1)

### Joint Entrance Examination

JEE Main JEE Advanced WB JEE

### Graduate Aptitude Test in Engineering

GATE CSE GATE ECE GATE EE GATE ME GATE CE GATE PI GATE IN

NEET

Class 12