Whats difference between a single phase & a three phase motor?

Whats difference between a single phase & a three phase
motor?

Question Posted / saranya

4 Answers
14807 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

Whats difference between a single phase & a three phase motor?..

Answer / jijomon

Single phase motor has pulsating magnetic field and three
phase motor has rotating magnetic field

Is This Answer Correct ?

27 Yes

2 No

Whats difference between a single phase & a three phase motor?..

Answer / ahmed hamdy

single phase motor can't self started so we use another winding only in starting and then this winding disconnected due to motor speed and also connect a capacitor to make phase different to generate rotating magnetic field but in 3 ph this not happened because rotating magnetic field is self generated due to phases different angle which shifted by 120 degree

Is This Answer Correct ?

18 Yes

6 No

Whats difference between a single phase & a three phase motor?..

Answer / venkatakrishnan

3-phase motors are self starting,whereas the single phase
motors are not self starting.

Is This Answer Correct ?

19 Yes

8 No

Whats difference between a single phase & a three phase motor?..

Answer / p. naik

The starting circuit of of a3-phase motor has a contactor
wherein all the 3 phases of the supply are connected to it.
Whereas in 1-phase motors only 2 phases are required & the
third input of the contactor is looped from it's own
output.The main diffrence can be spoted in the power
diagram itself.

Is This Answer Correct ?

11 Yes

12 No

Post New Answer

More Electrical Engineering Interview Questions

What are the applications that use Solid State Drives in your home?

1 Answers L&T,

what is wore of PLC ?

1 Answers

it is possible to rotate the DG engine dc starter with wrong polarity connections? why?

0 Answers

What happened when a three phase induction motor work on two phase supply.9

6 Answers

If the capacity of water Tank is 50000 Liters situated at 20 meters height from ground level,What would be the size of pipe and how much USGPH water will be supplied and what will be the motor or pump rating used for this work?Illustrate by showing formula?

1 Answers

AC current is flowing in a wire in your home how can you measure it(name of the instrument)

24 Answers NTPC, TCS,

How to calculate the sag on transmission Lines.

0 Answers

HAI,I HAVE 6,60KW MOTOR FEEDERS IN MY MCC PANEL.HOW CAN I DO MY SETTINGS FOR OVERLOAD,SHORTCIRCUIT,GROUNGFAULT,INSTANTANEOUS TRIP FUNCTION IN MY 4000A CIRCUIT BREAKER?

1 Answers

What is power factor why we should maintain the power factor unless what will happen

0 Answers

How turns ratio test is done in three phase transformers?

2 Answers

what is mean by marshalling box in transformer?

8 Answers Reliance,

Differentiate between digital phase converter and ordinary phase converter.

0 Answers

For more Electrical Engineering Interview Questions Click Here