Answer / limna

a brushless generator is an alternator.i.e,an ac generator. since ac supply is given to it,there is no risk of spark formation due to commutation.hence brushes are not required.

Answer / k.prakashchandra

In normal generator, DC supply to the rotating field given
with help of collector (slip) rings and brushes.In brushless
type the rotating armature of AC excitation gen is coupled
to rotor of the main gen ,and DC is supplied to field of the
main gen by converting AC output with rectifiers fixed on
rotating shaft.The field voltage to the main gen is varied
by varying the field excitation of the exciter.

Normally the starter used to reduce the starting current.but the dol starter do not it,so why we use it?

4 Answers  

---

sir, 3phase induction motor takes different pf and different KW in three phase while running,explain reason

0 Answers   UltraTech,

---

How can we calculate No load and full load torque of electrical machines, i.e. motor or alternator?

1 Answers  

---

two 100W/230V bulb are connected in series. what would be the voltage drop across 1 bulb

6 Answers  

---

1.what is the basic difference between surge arrestor and lightning arrestor and where we use it. 1.what is the difference between metal oxide without gapped lightning arrestor and with gapped lightning arrestor

2 Answers  

---

What products have you designed which have entered high volume production?

0 Answers   Intel,

---

In an alternator running with a balanced zero p.f. lagging load, phase differernc between the resultant armature flux and main field flux is always____? options is 180 degree....why?? explain.

1 Answers   BREB,

---

what will happen if any motor runs long time with star connection in400vA.C. system

5 Answers  

---

why neutral busbar size is SAME of the phase busbar size UPTO 200A IN LT PANELS

1 Answers   IBS,

---

Active power= VI COS FI But incase of leading power factor ( more than unity), may we use other formula ? because the cos fi (value of cos thita) should not be grater than one.

2 Answers  

---

What is the difference between reverse power trip & inadvertant trip?

1 Answers  

---

What are the transformer losses?

0 Answers  

---