Answer / g senthilkumaran

Scalar drive means only V/F control over the motor
torque can control by V/F mode

Vector control drives use a mathematical model of the motor
to dynamically determine the values of the essential
operating and control parameters. They are called "vector
control" drives because this analysis is based on a vector
representation of current, voltage and magnetic flux.

Vector drives continuously monitor and analyze the motor
current to determine what voltage to apply at any given
frequency to produce the optimum magnetizing current.

Vector drives provide excellent performance in terms of
accurate static and dynamic speed regulation and rapid
response to sudden changes in load torque

block diagram of 2 ups system connected in parallel mode?

0 Answers  

---

What is the purpose of Rotor earth fault relay and How to test the Rotor earth fault relay in generators and What is the procedure?.

1 Answers  

---

how can calculate static 3phase 4wire CT & PT operated energy meter constant when calibrating using refference meter suppose we have 11kv/110v PT and 30/5A CT, the meter constant is 160imp/kwh, where meter is showing MW energy? give me solution which constant i feed in my refference meter for calibration of energy meter?

3 Answers  

---

what is the iron loss in a 11KV/440V transformer?

2 Answers   Bhel, TVS,

---

what is the effect of connecting three phase supply lines to three phase auto transformer output terminals through a fuse of 10Amp and a circuit breaker (MCB). Is this connection permanently destroy the transformer?

0 Answers  

---

How will you calaculate the Ct ratio based on connected load 500KVA,and 11KV supply ?

3 Answers  

---

High voltage test procedure of in swgr board. why should measure millivolt drop on testing time?

0 Answers   NTPC,

---

there is a power transformer 66/11kV in delta-delta connection has 5 feeder coming out from the secondary side. One of the feeder in it normally loaded (loaded than other feeder)and this feeder usually trips with double OCR causing the bank transformer to trip. Now if the load of this feeder is put on other transformer then that no problems occurs on that transformer or the load. However normally all the test(IR, PI, short ckt, open ckt,grounding test and other ) has been conducted for this but evertything transformer..... I am not geting what is the actual problem...

2 Answers  

---

how to calculate cable size with respect kw

0 Answers   SPMI,

---

The error in a single phase energy meter where pressure coil lags behind applied voltage by 88 degrees and pf is 1) upf 2).5lag

1 Answers   GATE,

---

star delta starter control wiring diagram?

1 Answers  

---

what is Ith current?

4 Answers  

---