why the generator efficiency is greator than motor?
Answers were Sorted based on User's Feedback
Answer / natha
efficiency =o/p divided by i/p and i/p-losses=o/p for any machine
in generator efficiency(n) is
n=o/p divide i/p=o/p divide op+losses
for motor
n=(ip-losses) divide i/p
by simple maths first quantity is greater
consider same machine acts as both gen n motor having losses 5 units
generator(suppose op is 10) n=10/10+5=.66666
motor(suppose ip is 10units) n=10-5/10=.5
Is This Answer Correct ? | 11 Yes | 14 No |
Answer / ayid
for generator,, no slip detected because the speed of gen.
equals to the synchrounus speed... but motor speed always
less than synchronus speed & the diffrance is the slip which
reduce motor efficiency
Is This Answer Correct ? | 1 Yes | 4 No |
generator is a machine which converts mechanical energy to
electrical it is having only iron and cu losses. and the
rating of generator is also given in KVA.
motor is the machine which converts electrical energy to
mechanical in its output there are many loses like
frictional losses, rotational losses, Power losses,
Magnetic core losses,windage losses, and Stray load losses.
including the above losses occur in generator. and the load
here is resistive the rating of the motor is given in KW.
since efficiency is the ratio of o/p to i/p
i/p is o/p - losses
since the losses in motor are more the efficiency is less
in motor compared to generator
Is This Answer Correct ? | 13 Yes | 18 No |
Answer / gunasekaran
for generator i/p is not constant it is varriable but for
motor input power is constant.
Is This Answer Correct ? | 2 Yes | 12 No |
in 220 kv substation,what is the mean of avr voltage reading? means at oltc temp. 36 the avr voltage was 109v.so what the mean of 109v
What are the difference between CT/PT operated Meter and RRAMR Meter for HT/LT application?
what happens when reactive power increases ? does the reactive power loss increase or decrease ?
What is the purpose of a process loop? What is the controllers responsibily?
what is the significance of per unit impedance ?
what is meant by surge? what we called for high currents?
why we are called the 4-20ma transducer,not 0-20 ma transducer??
Classify the different types of load.
what are the components in electrical control panel (for example: 415V, 3-ph, panel to operate utility and 3-ph DG set).
whats happen if we disconnect the NGR of alternator in running condition?. Generally we observed that transformer netrul is directly grounded but alternator connected with NGR, then ground?
how to calculate unit consumption on 3phase 380-415 v0lt kilowatt motor eg ( 55kw,380v,3phase 50-60hz)
what is the defination of electrical engineer.