What is the difference between AC Drives and DC Drives?
Answer Posted / ajay daultani
DC drives are used for DC motors speed control whereas ac
drives are used for AC motors . Moreover DC drives have
only converter whereas ac drives have both converter and
inverter . in DC drives , thyristors are normally used for
converter whereas in Ac drives , thyristors/IGBT/ IGCT are
used dependong on the applications .
| Is This Answer Correct ? | 231 Yes | 23 No |
Post New Answer View All Answers
What are the causes of unbalanced current on 34.5kv feeder Ia=0.05,Ib= 0.25, Ic=0.15 and In=0.27 prior to tripping current are balance?
what is mean by NPS (Negative phase sequence)fault? what is the difference between EFR & OCR faults?
A 15 kw squirrel cage motor having a maximum efficiency of 90% on a continuous full load has temperature rise of 42 degrees celcius after 30 min and 52 degrees celcius after 1 hr under the above operation conditions. a) calculate its final steady state temperature rise on continuous load and the heating time constatnt. b) if the motor is operated on a short load for 9 min estimate its temperature rise. c) calculate the maximum overload that can be applied on a short, 9 min rating so that the temperature rise is the same as the final steady state temperature rise on continuous load.
what are the differences between 'exhaust fan', 'heavy-duty exhaust fan' & 'super heavy duty exhaust fan'. what are their power ratings ?
when it is possible kvrah lead & fundamental kwh be equal in electonic trivector meters (3 ph)
we have two generators different capacity on 15 MW and other 6MW at 11 KV , 15 MW gen. bus short level current 40KA,and 6MW short level current 25KA,, length of cable 100MTR between 6 MW from 15MW gen. for bus coupling . kindly tell any one can we use both NGR OR one NGR from any GEN. BOTH NGR has diff. rating. Tariq pakistan
Why derivative controller is not used in control systems?
My load is 1635 KW. & current pf is 0.884, I have to improve it for 0.99.Please suggest what KVAR value is needed?
in a silicon diode we can measure .7v in a voltmeter.but why we can't use this voltage for using?
EXPLIAN THE IMPORTANCE OF POLY PHASE CIRCUIT.
Do closed loops systems require manual input?
how to select battery for 15 KVA UPS with formula
what is the difference between "Rotary bypass isolation switch and Normal bypass switch" pls share indepth techs?
Why the field rheostat is adjusted such that the voltmeter reads 380V
What is the basic principal, by which DC voltage level is increased more than the supplied AC voltage during conversion. As upto AC level it is contorrled by firing anlge but after maximum level how is it possible.Please clear picture. OR we have to supply the higher level AC?