For the same power rating,which motor is bigger in size,AC or DC?
Answer Posted / sunny
AC motor will be of bigger size because of the alternating nature of current to reduce eddy currents core is laminated & also the outer frame has given a shape for max. surface area to dissipate heat.
Is This Answer Correct ? | 2 Yes | 12 No |
Post New Answer View All Answers
8. A DYNAMOMETER TYPE WATTMETER RESPONDS TO THE.......
if we look on phasor of the transformer vaoltage is 180 oppsite at primary and the secondary so to improve a power factor is secondary should kept negative to improve it primary side means is -.90 became +.90 at other side
how will calculate the safe starting current of 3-phase squirrel cage induction motor?
Why we use 4-20 mA Analog signal for the PLC input? Why not 0-20 mA? Why not 5-25 mA?
what are the major & minor faults that occur in an inverter and in UPS ? And how to repair and resolve them ?
HOW TO CALCULATE CAPACITOR BANK OR HARMONIC FILTER CALCULATION
HOW MANY TYPES OF FUSE?
How is the connection of the tap changer on the HV side been made?
What is gross error?
What are the special cables required for explosion proof wiring?
what is the difference between the characteristics of two different phase bushing of any transformer
How to protect sensitive loads such as Dosing pumps inside a factory from voltage surge/voltage fluctuation.
for a 500 KVA connected load, I calculated 30% of capactor for power correction. Even after using 225 KVR capactor PF is not improving. What could be reason for low Phase correction factor?
why do you add the load short circuit impedance when considering short circuit amperage. It seems that you should only consider supply. If you need to consider loads and you don't know what loads are to be added , what would be a good sub-transient reactance rating for the loads?
What is the most essential condition for the voltage build up for a d.c. Shunt generator?