Why material of brush is carbon in motors why not other
material.
Answers were Sorted based on User's Feedback
Answer / k.prakashchandra
1.A good conductor 2.Can be reshaped easily to suit the
brush holder 3. Chemically inert 4. Does not erode the
commutator segments 5.Does not wear away easily 6.Dust
easily blown away by the cooling air,as being light 7.Not
costly 8. Easily available .(It is used in the form of graphite)
Is This Answer Correct ? | 23 Yes | 2 No |
Answer / keepup
as per my limited knowledge i think the reaso y brush is
made of carbon is coz carbon has a negative temperature
coeficient of resistance, that is due to friction between
the brush and rotor, temperature is developed. as a result
the resistance of carbon brushes will decrease. for
instance if copper or aluminum brush is use, then when temp
increases at the contact pt between the brush and rotor,
resistance of the copper or aluminum brush will increase
resulting in loss of energy usually in the form of heat and
may lead to burning of the brushes.
Is This Answer Correct ? | 6 Yes | 0 No |
Answer / ahammed
In carbon brushes, since, its like a semicconducting
material, the resistance of which is depends on area of
contact. Its used to reduce sparking & to avoid short
circuit in armature segments.
Is This Answer Correct ? | 8 Yes | 6 No |
Answer / saurabh bhardwaj
1.provide high resistance for FORCED COMMUTATION.
2.PROVIDE LUBRICATION BETWEEN COMMUTATOR & BRUSH.
3.LOW COST
4.GREATER STABILITY AT HIGH TEMPERATURE
Is This Answer Correct ? | 1 Yes | 0 No |
Answer / niraj
carbon brushes have less friction and thus offer lubrication .
Is This Answer Correct ? | 3 Yes | 3 No |
what are the 6 terminals of the motor plss give me in details
In step down transformer (415/200V),mistakenly secondary side is connected to 415V for some hours, what would be result of this condition?
19 Answers Essar, GAIL, Vizag Steel,
generator(Deutz 550kv)is runing for 2 hours with load of 900 amp and then it goes in shutdown with alarm fault messege of speed fault although heirtz reading fixed at 50,what does that mean
why power not passes in plastic and rubber material
Why 15Amp. MCB is suitable to carry load of 1.5Ton Ac please Explain?
True or false question. 1.The fuse provide phase and neutral 2.power loss in electrical circuit can take place in (resistance or inductance or capacitance). 3.two phase system each phase has separated by a phase difference of (90 or 180 or 270 or 45). 4.3 phase balanced star connected load neutral current shall be (line current or phase current or zero or unity)
in telecom we are using neutral?
How to Calculate The Neutral Earth flat design calculation for the Synchronised generator (Gen 1-650Kva, Gen 2-725Kva
how mass curve differs from hydrograph.
HOW TO IDENTIFY THE RELAYS WHICH APPLICATION IN WHICH RELAY USING?
what type of transformer used in soft ware parks its distribution or power transformer. like 1800 kva
we have one ups its neutral is not earthed.its one distribution MCB has a earth fault.but we can not put off any MCB.so how to find out that in which circuit is earthed without isolating the breaker.