7. Why AC motors, AC bulbs etc... are donot operated by
DC signals? and
Why DC motors, DC bulbs etc... are donot operated by
AC signals?
- 2 Answers
- 4677 Views
- Bhel, I also Faced
- E-Mail Answers
Answer Posted / shashidhara tm
AC machines require magnetic flux change at designed frequency... In case of India, 50Hz. For example, if no changing flux is given to an induction motor, it won't produce a rotating magnetic flux resultant on the rotor and it won't rotate the rotor. If no alternating voltage is given to a fluorescent lamp, it won't produce high voltage breakdown in the inert gas and emit UV.
But I'm not sure whether a DC motor works or not on AC voltage...
| Is This Answer Correct ? | 2 Yes | 0 No |
Post New Answer View All Answers
Why the standard of ambient teperature mentioned as 40 degree celcius in machines.
what is the solution for meger test failed the MV cable?
what is the purpose that we use PLC system in power system
WHAT IS DOL STARTER? HOW IT WORK? GIVE ITS CONTROL AND POWER DIAGRAM .
how to calculate sizing of NGTR (Transformer rating,Loading resistor value and Current rating of resistor) and what is the X/R ratio. Details : 11kV,Capacitance 1.73532 micro farads,40kA for 1sec.
what is the prosses for getting of 33kv licence (i have completed my engineering degree & working in 33kv substation for contract basis )????
How many types of electric motors are there?
What do you mean by Stimulastion Test in Diesel Genarator / Why & when it's conducted ?
How to design the earth grid for lightning protection in an industry
How shall i select the value of capacitor or inductor in a system?
what is the major difference between LIBBP & HIBBP.. which one is most preferable..
what are factors to be consider in electrical installation like load factor,diversity factor .....
what parameters are should nessary for control technic dc drive(in rolling mills)?
(1)The demand for electricity , the amount of renewable generation available, the amount of fossil fuel generation available and the cost of the fossil fuel generation are shown in table below period(hrs) demand(MW) renewable (MW) fossil- fuel(MW) cost of fossil fuel(MW) 00.00 - 01.00 2000 1800 2000 30 01.00 - 02.00 2300 2500 2000 30 02.00 - 03.00 2500 2700 2100 45 03.00 - 04.00 2900 3100 2100 50 04.00 - 05.00 2700 2600 2500 45 05.00 - 06.00 2400 2000 2700 50 06.00 - 07.00 2200 1800 2000 36 07.00 - 08.00 2100 1600 2000 36 Assuming that the renewable generation incurs zero cost, determine an optimal generation schedule(specifying the amount of renewable generation and fossil fuel generation used in each period, the cost for each period and the overall cost for 8 hours.)
how much winding resistance of 0.75kw to 12.5kw 3ph sqwiralcage induction motor?
