what is difference between AC VVVF drive & Dc VVVF drive
explain their working principle?
Answer Posted / gangadhar
Frequency is related for only alternating current, so there
is no dc drive if you want run by the dc first convert dc
into ac after words you can use VVVF drives
Is This Answer Correct ? | 66 Yes | 9 No |
Post New Answer View All Answers
Whether it is possible to measure energy at the input of rectifier transformer (12 pulse with very high odd harmonics)
a 230v transformer with step down ratio 19:1.it has 2000turns on primary and rated 25va calculate max primary current no of secondary turns volts/turn
What is servo motor? what is its purpose?
what is the main parts of transformer? how it is functioning? pls giv the ans briefly.
all details of DG UPS HVAC
what is meaning of sympathetic tripping with respect to relays and give the values for current carrying capacities for copper and aluminium cables from 16sq mm to 500sq mm
how power is generated,and transmitted to our home..pls explain briefly in simple words.
What is effect of over voltage and under voltage on ACB
how to select electronic timer(Star-Delta) setting for diff. rating motors
how we control automatic generator i'e with to supply (main supply and local generator) when the main supply was break to supply the local supply automatically to begin supplying power.I now this control circuit is the combination of contactor time delay contactor switch and overload relay .but my question is how we combine those component thank you
HOW TO CALCULATE THE VT SIZING?
What is the settings of distance protection relay in 400 kv line
what is meant by rotating magnetic filed
What is the safety of UPS?
which one is more efficient, torq, power & ecnomy with the same frame size AC motor / DC motor?