Answer / aditya shirbavikar

Free wheeling diode (Fwd) is used in a d.c circuit, generally in a.c drives in which two stages are used to convert FFFV to VVVF. first rectification and then inversion. so, free wheeling diose is placed between rectifier bridge and invertor bridge so to prevent the reverse a.c pulses from blowing up the rectifier bridge circuit.

Answer / aj

simple u cannt break
inductive ckt. And coil is
essentially inductive so fw
diode is to used to make use
of inductive current when
switch is off.

what is the use of the circle diagram

2 Answers  

---

without name plate detail of blower how we can find out the HP & Rpm ? the input voltage is 230v single phase

1 Answers  

---

What type of DC Generator is used for Arc Welding purposes?

7 Answers   CPCL, Rubicon,

---

What will hapen if we connect more capacitors than required for powerfactor control? Exactly what will be the effect on power system?

2 Answers   Mandovi Pellets,

---

why generator efficiency is more in swinburnes test?

0 Answers  

---

How the speed of synchronous motor changes with the variation of load?

1 Answers  

---

How is The split core current transformer working ?

1 Answers   Honeywell, NCC,

---

What are the two basic types of transformers?

0 Answers  

---

why one pin of plug pin is longer than other two? In some mobile chargers one pin is made not conducting .Why?

4 Answers  

---

Why we use a H.T. Fuse from a thick wire, on other side we use high rating of cables? & Why we use less Sq. mm Cable on H.T. side , on other side we use Large Sq. mm cable?

1 Answers  

---

What is the difference between PLC & DCS?

1 Answers   Power Plant,

---

v/f drive basic princeple

0 Answers  

---