Interested to Buy Any Domain ? << Click Here >> for more details...
Why material of brush is carbon in motors why not other
material.
- 5 Answers
- 9503 Views
- NTPC, I also Faced
- E-Mail Answers
Answer Posted / 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 |
Post New Answer View All Answers
Why in 6 KV XLPE cable termination kit used and why not in 380 V xlpe cable same is not used
what are the factors to be considered while design the breaker either HT or LT??
Different types of relay fault which phase sequence??
High voltage test procedure of in swgr board. why should measure millivolt drop on testing time?
why only exciting current is shown not primary current in transformer???
How to calculate of maximum demand if given 628kw, 785kva, 0.8 p.f.
what is the necessity of under ground cables ??
What is the magnetic field (coil DC ) of Turbo Expander?
What are the advantages and disadvantages of open loop control system?
How we can recongnise the phase displacement of transformer connection between primary & scondary...plzzz explain it with example.........
How we calculate DC inducation moter Amp? Sir pls give me formula......
What is the difference between DOL starter and star delta starter
How do i perform grounding of star point of Genset (400V) for making connection with step up transformer of DELTA-DELTA (400V to 20KV) ? while Genset itself has its own neutral and grounding bus bar inside genset breaker box whereas we have another neutral and grounding busbar in synchronizing panel next to genset at maximum distance of 6meter, would someone pls advice if we can only perform neutral grounding in synchronizing panel or should we ground neutral on both places inside genset breaker box and synchronizing panel.
Why did lightening arrestor solid copper rod head is sharp on mobile tower top?
how are reversing the direction of rotation of dc motor
