Answer / manish meena

The reason is that syn. motor is mainly designed for
constant speed operation,as wind is not blowing with
constant speed,so we can not use syn motor.

Answer / just some guy

It all depends on the connection to the grid. Synchronous
machines can be used as well, but they have to be decoupled
by power electronics to adapt the frequencies of the wind
voltage and current to the grid voltage. Induction machines
are very reliable and there is less maintenance expected. So
the answer would be: We could use the syn. machine, but the
distribution system would have to be built on different
considerations, which might be more costly.

Answer / sameer

first we know that
synchronous motor is
not self starting
motor so it reqired dc
exitation to the rotor
and this problem is
not in i.m so if we
consider to connect
motor to wind mill
than we need to power
produce not the use
otherwise it decrase
efficiency and also
synchronous motor is
complicated
construction then i.m
so

My question is whether bellow formula is correct to find bus size for 46kA for 0.5 second & what is RT in bellow formula. formula to calculate the size of busbar to withstand the thermal stresses due to currents with duration of 0.2 sec to 5 sec. Sp = RT( I x I x t) / K Where Sp – is the cross sectional area of bus bar in millimeters. I -    is the value of AC fault current. t -    is the operating time of disconnecting device in seconds. K –  is the factor depending on the material of the conductor, insulation and initial and final temperature. Value of ‘k’ for copper is 143.

0 Answers   Premier,

---

What is meant by pilot exciter and its working?

2 Answers  

---

How Much Capacity of Diesel Genset is suitable for 20 no.s of 1.5ton AC's & Why?(Load Calculation)

11 Answers   Lapis Technologies,

---

what is the difference between scaler and vector control in drive and where it is to be used ?

1 Answers   Essar, TCS,

---

How the Transformer oil testing is done & Why oil dielectric goes LOW & what is solution for that ??

3 Answers   NTPC,

---

What is Surge Capacitor? Why it is use in Generator Circuit Breaker?

0 Answers   TCS,

---

how much current we can get from 11kv overhead line ?

8 Answers  

---

is it possible to start a motor in felid connected to a remote mcc

0 Answers   BIET,

---

why field winding in synchronous machine connecting in star position?

1 Answers   HCL,

---

how to caluclate cable size by Amps

2 Answers  

---

we have two motors 1250kW,6.6kV to be coupled on the same shaft ,so please provide assistance for their synchronisation.

0 Answers  

---

i HP = ?? 746 watts or 735.5 and how??

1 Answers  

---