why we are giving D.C. supply to field of an alternator, why can't we give the a.C. supply
Answer Posted / mahesh
we need a rotational magnetic field of sine wave for the
emf to be induced . if dc is given, the field that is
produced in the air gap is almost a sine wave with constant
magnitude. for ac excitation the air gap flux is not a sine
wave .
| Is This Answer Correct ? | 8 Yes | 4 No |
Post New Answer View All Answers
WHY THREE PHESE SYSTEM VOLTAGE APPLIED IN 440 VOLT
How servo stabilizer works.
any one can explain what is the size of pvc,armoured, various sizes of powr cable dia?
In both 600/1000 V cable and 450/750 V cable, we can supply 415 V. However for distribution, all utilities are using only 600/100 V instead of 450/750 V. What is the reason?
How we can calculate the life of Lead acid battery
Describe the colour rendering properties of i) tungsten filament lamps ii) tubular fluorescent lamp
how can check the resistance of battery contact?
A 2083kva AVR was tested, phase to ground shows continuity, what is the implications
Is it required to lay 2 runs of GI wires along with armoured cables from one power DB to another Power DB?
Define the term Capacitance and Inductance?
what is feeder bay?
What is the difference between the relay and the circuit breaker?
In ACS 1000 drive we are using 12 pulse converter,why don't use 3 pulse converter.
what is the formula for computing cable tray size & capacity
How does an induction motor start?