why a three phase induction motor cannot run at synchronous
speed ?
- 7 Answers
- 46325 Views
- RUET, I also Faced
- E-Mail Answers
Answer Posted / noushad s
the source for the torque in a three phase induction motor
is the slip.and slip energy is caused due to the
difference in speed of the rotation of stator flux wave and
the rotor.where the former rotates in synchronous speed.as
a result emf will be induced in the rotor and which as per
lenzes law will try to oppose the cause of the emf here
which is relative speed .the rotor now tries to catch the
stator flux wave.if it runs in synchronous speed means
there is no relatyive speed and no slip energy and no
torque and hence the motor will stop.
| Is This Answer Correct ? | 152 Yes | 15 No |
Post New Answer View All Answers
Difference between earthing & grounding.?
need to make a report. Need to choose a 3phase induction motor. Load conditions motor will operate in : Maximum Load: 30 Kw Speed: 2950 rpm Ambient temp: 20 cent Supply voltage: 440V Frequency: 50Hz need to look for the safety factor when choosing the motor, went through catalouge found a few, but dont know how to choose the safety factor allowing an extra load something above 30 KW to avoid any harm.
we have 2.2kw,Y,3000rpm motor but 6leads found in TB what happen if we connect in delta?
Why and when NGR panel required. Is it necessary to design a NGR panel for a 6.6kV Alternator paralleling with Grid????
Does all the output contacts (N/O as well as N/C) of a Numerical relay operate when relay receives a binary input/inputs or contacts are designated to specific logic input/inputs and only these contacts operate?
in power generator normaly voltagr betwween esth to neutral is 0 but my work place generator show the volatge is 60v any body know why? thanks
How to megger test 11 kV cable and the acceptance IR value
I'm generating a pulse of 3V with frequency 80Hz (12.5ms time period) and pulse duration 0.125ms and feeding it to a transformer since i want the pulse to get amplified around 60V. At the output amplification s happening but the pulse is changed to a spike, can you tell me what could be the reason? (an ordinary transformer 220V-12V stepdown transformer is reverse connected ie. now it is 12V-220V stepup and voltage amplification happens)
What Should be the value of Vector Surge angle at Tripping and how to calculate it?
what is the difference between general inverter and solor inverter clerly explain plz
what is the correct format to create a resume for interview??
What is shutdown of electrical sub station?
What are capacitive,resistive,inductive surge absorbation? What is ferranti surge absorber? What is lagrangian cost? What is Px operator?
why swinburnes test cannot be performed on series machines?explain
What is a differential amplifier?
