What causes stator failure?

4 Answers

Answer :

Speed of the motor increases rapidly


Answer :

When the load supplied by the motor decreases abruptly but the voltage is kept constant this may cause overheating of the stator winding leading to failure of the stator.

Answer :

Enough rate of current flow instead heavy current flow in the conductor causes stator failure due to heat(temperature) increase.

Answer :

Stator faliur due to moistur. Due to priodically heatup of winding.

Related questions

Description : What is a stator in a motor?

Last Answer : Stator is the stationary part of the electrical machine both motor and generator. In motor it provide the rotating magnetic field to drive rotor and in case of generator stator convert rotating magnetic field into current.

Description : State the function of following parts in Induction motor. (i) Stator (ii) Slip rings

Last Answer : Name of part Function Stator 1) Stator frame supports the core, terminal box and protects the inner parts. 2) Stator core houses stator winding. 3) Stator winding ... ) Provides facility to connect external resistance to rotor circuit through brushes for starting and control.

Description : A _________ is used to measure the stator % winding temperature of the generator.  (A) Thermocouple (B) Pyrometer (C) Resistance thermometer (D) Thermometer

Last Answer : A Resistance thermometer is used to measure the stator % winding temperature of the generator. 

Last Answer : The stator of phase shifting transformer for use in conjunction with an A.C. potentiometer usually has a two-phase winding.

Last Answer : The purpose of stator winding in the compensated repulsion motor is to improve power factor and provide better speed regulation.

Description : An electric motor in which both stator field and rotor rotates with same speed is called?

Last Answer : An electric motor in which both stator field and rotor rotates with same speed is called synchronous motor.

Description : State the external causes of failure of electrical equipment.

Description : Will you share how a past failure helped you succeed?

Last Answer : As in succeeding in life or succeed in obtaining wealth or a job? Not sure what you would quantify as success.

Description : What are your thoughts on the FAILURE of Trumpcare?

Last Answer : Great delight! It was a cruel, cruel bill.

Description : How will you get over yourself from such failure?

Last Answer : answer:Your question is very specific. I can only think of general answers. First, every human being is flawed. Even your greatest heroes aren't perfect. We can all inspire one another without having to be ... is your own best self and not an imitation of someone else. Third, you're not through yet.

Description : Do you feel like a failure?

Last Answer : I’ve yet to achieve the Oliver Twist award for getting Great Answered on an orphaned question, so I am a Fluther failure.

Description : How do you cope with failure?

Last Answer : In the case of the failure of my first marriage, it varied day to day, over about a 2 year period. It was a mutual decision, made by two people who still loved each other but could not ... I cried and grieved, screamed and shouted, reflected and grew calm, and eventually accepted it and found peace.

Description : Fuel Pump Failure

Last Answer : Is your car having acceleration problems? Has there been an occasion when your car simply sputtered and died while on the road? If your answer is yes, then you may want to check your car for fuel pump ... a fuel pump is to take your car to a repair shop where professionals can do it for you.

Description : What is phase failure relay and how it's work?

Description : The maximum torque which a synchronous motor will develop at rest for any angular position of the rotor, at rated stator supply voltage and frequency, is known as?

Description : Was there any feat that you wanted to achieve as a youngster?

Last Answer : To be academicly advanced to university. From grade 5.

Description : What was the last thing you failed at, did you try again, and what did you do differently the second time?

Last Answer : I failed grade 12 math, so I took the multiple choice test over and over until statistically I would pass. Exactly 50% to pass. Got my advanced high school diploma and went to university.

Description : Have you wasted your potential? If so, does that bother you?

Last Answer : I think so. It bothers me every once in a while when I’m the what if mode. But not so much anymore as I’ve pretty much ended up where I think I was going to end up anyway—I just didn’t do it as a doctor. I did it as a nurse instead. I could have done so much more as a doctor.

Description : Can stereotyping be a positive thing sometimes?

Last Answer : If you see a ‘gang’ coming towards you and assume they will hurt you, and you end up getting home safe because of your stereotyping, I guess that would be a positive.

Description : When in your opinion can a person really give up on himself? At what point can he say that it's not worth even trying?

Last Answer : Probably when it’s causing more physical harm than good, then it’s time to call it quits.

Description : How many corporations failed in the U.S. in 2010?

Last Answer : Not sure if some government agency tracks this number. It would be very difficult to keep track of, as it would have to include every Joe-Schmo who started up a business off some asinine idea ... for instance had a painting business one summer. Incorporated and everything. Didn't even last a year.

Description : Did Gordon Gekko have something: ”....Greed, for lack of a better word, is good. Greed is right, greed works.”?

Last Answer : Yes. Yes he did.

Description : Do some people hate success in others?

Last Answer : There are people all over the place who can’t succeed themselves and therefore envy others and want to see them brought down / discouraged at the very least. And yeah, they feel like losers so they want the contaminate the rest of the world with their feelings. They are the people you need to avoid.

Description : What are other examples of where "new and improved" may not always be better?

Last Answer : answer:Cosmetic surgery :(

Description : Is there something you would like to do, but are afraid you might fail?

Last Answer : Call a talk show on the radio. I am afraid I will say something stupid and forever brand myself as the ‘Idiot’ who made a arse of himself on the air.

Description : Why can't we value failures for their ability to contribute to our future success?

Last Answer : Most people do – they refer to it as “experience”. Most very experienced people have hit the deck a few times.

Description : Have you ever been afraid to do something (thinking that you'd fail), but, when you pushed yourself to do it, you realized that it wasn't so difficult afterall and your effort proved to be successful?

Last Answer : Yes, my job dispatching. I originally turned it down, thinking I’d never be able to remember 30+ pick-up routes. Now I could do it in my sleep.

Description : Has the fear of failing prevented you from trying to achieve something in your life?

Last Answer : So much. I consider it one of my worst flaws.

Description : Experience is simply the name we give our mistakes?

Last Answer : I like to think that some of my experiences have been positive :)

Description : number of windings of a coil in a stator of ac motor for ey slot ac motor

Description : The rotor impedance of a slip ring induction motor is (0.1 + j0.6)Ohm/ ph . The resistance/ph to be inserted into rotor to get maximum torque at starting should be

Last Answer : The rotor impedance of a slip ring induction motor is (0.1 + j0.6)Ohm/ ph . The resistance/ph to be inserted into rotor to get maximum torque at starting should be 0.5 Ohm

Description : What is the rotor of a motor?

Last Answer : Rotor is the rotating or moving part in motor and generator.

Description : Voltage failure of an AC generator may be caused by ____________. A. failure of the exciter generator B. a tripped bus circuit breaker C. high mica segments on the stator bus bar D. excessive prime mover speed

Last Answer : Answer: A

Description : Which type of protection is provided on a generator to protect against stator insulation failure? A) Differential protection B) Overcurrent relay C) Thermocouple actuated alarm D) Reverse power relay

Last Answer : Which type of protection is provided on a generator to protect against stator insulation failure? A) Differential protection B) Overcurrent relay C) Thermocouple actuated alarm D) Reverse power relay 

Description : A synchronous motor maintains synchronism with the rotating field because _____________. A. field strength varies directly with rotor slip B. DC current applied to the rotor coils causes the rotor ... the flux created by the excitation current D. the stator flux rotates in the opposite direction

Last Answer : Answer: B

Last Answer : Alternator Fixed Part of it Stator Says.

Description : Voltage build up in an isolated induction generator depends on A. Capacitor bank value B. Residual magnetism of the rotor iron C. Residual magnetism of the stator iron a) A, B b) A, B, C c) B d) A, C

Last Answer : Ans: A

Description : As shown in the illustration, the purpose of the item labeled 'Z', in assembly No. 2, is to _____________. EL-0001 A. keep the rotor in balance B. align the rotor to the stator C. dynamically balance the rotor D. cool the motor

Last Answer : Answer: D

Description : Which of the following statements describes what will occur if the motor shown in the illustration is required to carry 150% of full load? EL-0056 A. The primary counter emf will be increased. B. ... slip will decrease. D. The slip value, stator current curve, and torque curve will all coincide.

Last Answer : Answer: B

Description : The torque and current curves for a three-phase induction motor with a cage rotor, are shown in the illustration. Which of the following statements is true concerning the depicted curves? EL-0056 A. As slip ... D. If the motor is loaded to the point where 40% slip has resulted, it will stall.

Last Answer : Answer: D