Why we use Capacitor in Single
Phase Induction Motor?
- 12 Answers
- 31669 Views
- IIT, I also Faced
- E-Mail Answers
Answer Posted / durai
To produce a rotating magnetic field we need at least two
phases.with single phase u cannot produce rotation.
So at the time of starting capacitor(starting winding) used
as a second phase to produce field
After that fan will rotate with main winding only
| Is This Answer Correct ? | 29 Yes | 3 No |
Post New Answer View All Answers
A 7 storey building has a floor area of 35,000sq.ft on each storey. On the ground floor 11KV electrical sub-station is to be erected. A load of 3kw for every 400sq.ft (p.f is 0.8) is proposed for each floor. fire pump 7.5hp, water pump 5hp, lift 2 nos, each 10hp and 20shop load of each shop is 5kw. calculate a. load each floor b. total load of building c. L.T feeders for aech floor and from transformer to main. d. distribution diagram e. capacity of sub-station/capacitor bank f. line diagram
What is conventional thermal current (Ith)
I am getting above 60 V as open delta voltage against single phase unit ICT at tertiary delta formed and ICT getting trippped on NDR. ICT tested and found in order. PTs provided on tertiary are tested and in order. what may be the reason?
Explain RLC circuit?
hii this is ranjith from hyd... i want to know what type of questions they ask in interview...and hw the interview will go..? what subjects thay ask specially for electrical engg students?
WE know that for Inductor X=2pifL,In DC f=0,then X=0 so,V=IX=0;But In the DC excitation of rotor of AC generator,DC motor field coil which coils are inductor so why does not applying DC voltage short the rotor coil of AC generator and field coil of motor?If it would then DC source might be damaged but it is not happened. Why does the strand conductor of Electrical power transmission line make twist?
what is mean by dry frequency
what is earth pit , how we can measured it, what earth rods reference
What is servo lock in CNC how they work and if any parameter for them in CNC machine
which is better to use svc or synchronous condenser why ?
If short circuit ratio is high is it bad or good for a machine then tell the reason...
how we decide wire gauge for ac or dc coil and what is the basic diff. B/w these two coil?
Metal covered multiconductor cables shall employ a marker tape located within the cable running for its complete length in lieu of cable surface marking. Is it true or false?
What is core CT & it's function?
Why reactors use before incoming of ac vvfd drive?
