Answer / Sangeeta Kumari

The voltage and frequency are varied in a Variable Voltage Variable Frequency (VVVF) drive by controlling the frequency of the pulse-width modulated (PWM) signal generated by the inverter. This variation allows for smooth control of the motor's speed and torque. For more detailed information, you can refer to texts such as 'Electric Machines and Drives' by M. A. Al-Bachir or consult relevant technical papers online.

what is voltage gradient?

8 Answers   Bhel,

---

What are the main parts of central chiller plant? Explain the function of each stage.

1 Answers   HSL, Shankar Electricals,

---

which type of A.C motor is used in the fan (ceiling fan, exhaust fan, padestal fan, bracket fan etc) which are find in the houses ?

25 Answers   Airtel, MPPTCL, USSA,

---

i need list of swg(standard wire guage) or area of conductor v/s current carrying capacity of conductor copper & alluminium...

1 Answers  

---

WHAT IS THE FULL FORM OF CABLE TYPE-AYWY,AYWAY,YWY ?

6 Answers   Polycab, VIR, XLPE,

---

from generating station If 400v LT line length is 1000m how much voltage is drop and how do i calculate it? which cable will be use for this line?

1 Answers  

---

where is the primary of CT??

3 Answers  

---

2. If 8.35%Z means the percentage impedance of 132/11kV transformer self,will like to reconfirm the percentage impedance that is supplied from power company?

2 Answers  

---

what is stator inter turn fault?

1 Answers  

---

In n high voltage 11kv system What happened if 1 of CT cable (IDMT) loose.Will e/f or o/c trip.please explain detail

1 Answers  

---

What could be the problem if two power transformers trip on stand by earth fault at same time

1 Answers  

---

I have motor 1500 HP and , 4160 V , 60 HZ , then i need the rating of transformer which can feed that motor ??

1 Answers   Elmaco,

---