Interested to Buy Any Domain ? << Click Here >> for more details...
Synchrounous motor is three phase motor,but its not self
starting .why?
- 23 Answers
- 57740 Views
- Delta Beverages, KI, L&T, NTC, TVS, Wipro, I also Faced
- E-Mail Answers
Answer Posted / prasanth
"A synchronous motor is not a self starting motor because
torque is developed when running at synchronous
speed,therefore,the motor needs some type of device to
bring the rotor to synchronous speed."
EXPLAINATION:
As per operating principle of synchronous
motor,due to continuous and rapid rotation of stator
poles,the rotor is subjected to a torque which tends to
move it first in one direction and then in the opposite
direction.Owing to its large inertia,the rotor cannot
instantaneously respond to such quickly reversing
torque,with the result that it remains stationary or in
other words it is not self starting.
| Is This Answer Correct ? | 1 Yes | 1 No |
Post New Answer View All Answers
What is the formula to calculate the rating of a three phase miniature circuit breaker
What is the use of Surge Capacitor in LAVT?
the winding of Generator and Motor is star or in delta ? and why
following are the questions asked in interviews: 1) Considering the short circuit fault, which switchgear is preferable, SFU OR MCCB? Which operates faster? whicg one is popular in Indian Market and why? 2)Define SCPD. What is type2 coodination? 3)Why the contactor rating is higher for the fuseless selection than for fuse selection? whether the ratinf of SFU or MCCB remains the same in both the cases? 4)If the HP rating is known then can you calculate the ratings of L.V Switchgear(SFU/MCCB, contactor, OLR) without using the selection chart?
What descriptive information does the NEC require to be marked on all conductors?
which type of stability limit is higher,steady state or transient? why?
what is the use of vcb & isolator in substation?
In hydel power plants, L.A's, S.C's are placed inside the control panel boards. what is the purpose? [already the total body was earthed to ground.]
what rectifiers is and what are the types of rectifiers?
If any one's require of phoenix contact like( relay , termilnal block , surge protection device ) , product please contect me 09878206357 chetan verma
Please brief what is sinewave
which type of amplifiers are used in multimete?
what is Fan Control Cubicle
all interview questions with answers of ntpc (2000-2009
Differentiate between induced emf and self inductance?
