How many losses in generators?
how we can reduce them?
and also in motors,transformers?
Answer / varun devulapalli
for any machine whether it may be rotating or stationary, the common losses are the iron losses and the copper losses. But in additional for the rotating machines there are mechanical losses. Iron losses comprise of two losses i.e., hysterisis loss and eddy current loss. Hysterisis loss depends on the type of the material used and its B-H curve. Eddy current loss is due to the induction of eddy currents in the armature material. these eddy currents are not useful but they create heat in the machine. so to reduce eddy current losses we use thin laminations in the core with a very thin insulation like paper in between each lamination.
Copper losses are divided into field copper loss and the armature loss. copper losses are the ohmic losses which arrive due to the resistance in the winding. square of the current multiplied by the resistance gives the copper losses.
Mechanical losses comprise of frictional and windage losses. frictional losses arive due to the ageing of the bearings. windage losses are due to the wind that oppose the rotation of the machine in a direction.
less losses leads to maximum efficiency.
Is This Answer Correct ? | 0 Yes | 0 No |
What are the different parts of Alternator and how it works?
what is trip circuit supervision relay? How does it work in switchgear?
6 Answers Radha Regent Hotels,
What happens if i apply 500V to 440V rotary Switch ?
If only R Phase is connected in 2 pole elcb, n is not connected than it will work or not in ground fault.
what is the difference between upper impedance and lower impedance distance relay?
3 Answers Havells, Power Grid,
why total tape position are odd in number in Power transformer ?
when a three phase motor in running condition consumes 2A in each phase,and if one of the phase gets fails what will be the consumption in other two phases
Whatis the procedure for getting Electrical (light) licence while Iam a diploma holder in electrical Engg . I Compleated my one yr Apprentice training & worked as a junior engineer (ele) for 2 yr(contract basis).
what happen "when Dyn11 is parallel operation with Dyn1"?
what is soft starter? what is the difference between soft starter and star delta starter?
How to test Power Transfomer vector group in the field?
How can we check ELCB trip current sensitivity How can we check earth resistance value