Answer / tanmay maheshwari

Servo motors are used for testing faulty conditions as they
rotates only when an error signal comes to its control winding.
when an error(deviation from a rated speed) occurs in the
system, the control winding which is placed 90 degree to the
main winding generates a reverse torque hence regulating the
speed.
So to work properly, torque should vary linearly with speed
such characterstics are not found in induction motor and
hence they can't be used for such purpose

what is mean by flux

2 Answers  

---

Hello sir This is prakash from bangalore i have a doubt why we have to maintain DG power factor in the range 0.78 to 0.8 Perhaps i f it is increased means what will happen in DG

3 Answers  

---

What is formula of capacitor for 1-phase power connection.how to improve PF. Suppose I want to connect capacitor in refrigerator to reduce power consumptions.

0 Answers  

---

no of rotrs poles in salient pole synchronous machine

3 Answers  

---

Why stones are layed under Transformer

4 Answers  

---

11kv has three live wires how much voltage is in its single wire(leaving the other two wires)

13 Answers   Power Grid,

---

what is an isolation transformer??? what is its purpose??? what happens if it is not used where it should be used?????

2 Answers  

---

What is meant by pilot exciter and its working?

2 Answers  

---

How to know about the rating(voltage and other) of induction motor if its name plate is missing at the manufacturing site.

0 Answers   ABB,

---

how to identified power tranfer line is how much KV????

5 Answers   Essar,

---

We have received supplies of the ordered material. payments against the supplies also released. Where ST paid 4% against form C. Meanwhile it has been observed that 25% of material supplied was defective. Please suggest whether the issuance of C form from our side would be stopped till settlement of liabilities.

0 Answers  

---

if an induction motor is operated at unity power factor what will happen? will motor run or not? kindly describe a logical answer?

2 Answers  

---