Answer / guest

VFD is variable frequency drive.Its varies frequency of
applied it,its use for variey speed of AC MOTORS

Answer / chinmaya

VFD is variable frequency drive.It is used for regulating
the RPM of a motor by regulating it's frequency.

Answer / abhishek goyal

VFD: Variable frequency drive
Input supply: 3phase AC 440V, 50HZ
Output: 3phase AC 440V, variable freq.

VFD is the speed controlling device for motor by using
frequency method OR V/F Method. In VFD 3phase ac supply
change into the DC and after the dc supply can control or
change by IGBT into 3ph ac supply. it can be change
frequency by triggering the IGBT gate by given supply
voltage to gate. According to gate activation it can change
or convert ouput supply into variable or desire supply.

Answer / nipesh sathavara

VFD is variable frequency drive.It is used for Speed control of motor with current control.As Maintain by V/F ratio.

Answer / venkat iyer

VFD is known as Variable Frequency Drive, and is used in AC Electrical System for varying the speed of a 3 phase squirrel cage induction motor, by varying the output frequency of the drive. The AC voltage is initially converted into DC and the energy / POWER is stored in capacitors which is later inverted through IGBT (insulated gate bypolar transistor)

how to design step down 12 V, 1mA small transformer from 220 V AC? Because according to VI relation and power transfer it results bulky...

0 Answers  

---

What is deference between MCB & MCCB & ISOLATOR

0 Answers   Prakash Industries, Standard Chartered,

---

HOW CAN I GET 5CORE HO7 CABLE SIZE IF I HAVE 1800A?

0 Answers  

---

what is impedence of transformer? its formula

1 Answers  

---

What will happen if supply to three phase motor is given wiyhout inerting rotor in it?How much current it will draw?

5 Answers  

---

---

Can VFD step up to 60 Hz if it is designed to receive 50 Hz input?

3 Answers  

---

what is the diff between VCB & ABCB breaker in substaions? explain the operating priciples of VCB & ABCB

1 Answers  

---

what is the difference between Inverter and ups

1 Answers   L&T, MTS,

---

what is the voltage between earth & neutral in 3 phase electrical connection.

0 Answers   Megatron Solutions, SIPL,

---

what is load shedding

4 Answers   KSEB,

---

WHY DOES NEUTRAL DO NOT CARRY EVEN THOUGH IT CARRIES RETURN CURRENT?

3 Answers  

---

when ac current flows thru d coil of a contactr,it energizes,magnetic field attracts d contact of the coil...nw wont dt ac current in d contct induce current back on to d coil thru mutual inductance leading to high currnt in d coil

0 Answers  

---