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Blog Entry# 1947761
Posted: Jul 31 2016 (21:16)
35 Responses
Last Response: Aug 03 2016 (22:28)
35 Responses
Last Response: Aug 03 2016 (22:28)
Gatiman Express (Nizamuddin / Agra Cant) is being hauled by Ghaziabad WAP5 locomotive. Why WAP7 which is more powerful is not used here?
9 Public Posts - Sun Jul 31, 2016
23 Public Posts - Mon Aug 01, 2016
yep, totally related to electric machines and electric drives ;)
when you go for v/f control, your motor has 3 'zones' of operation: Constant Torque region, Constant Power region and High speed region.
in Both P7 and P5's graph you'll see a flat region in the beginning. this is constant torque region, where we maintain v/f ratio constant, which means torque is also constant. As you must have guesses, as speed increases, frequency of rotation also increases and hence to keep v/f ration constant you have to increase input voltage to motor. However...
more...
when you go for v/f control, your motor has 3 'zones' of operation: Constant Torque region, Constant Power region and High speed region.
in Both P7 and P5's graph you'll see a flat region in the beginning. this is constant torque region, where we maintain v/f ratio constant, which means torque is also constant. As you must have guesses, as speed increases, frequency of rotation also increases and hence to keep v/f ration constant you have to increase input voltage to motor. However...
more...
1 Public Posts - Tue Aug 02, 2016
1 Public Posts - Wed Aug 03, 2016