Answer / super solutions

Most of the Variable frequency Involves PWM technique and
for switching purpose they have IGBT's,. By switching on
And off the IGBT's we can change and control the Frequency.

Answer / capseee

By triggering the IGBT inverter of the drive we can change
output frequency.

Answer / felixraj

by Invertors(cycloconvertors).only condition is to maintain
V/F ratio

Answer / pinoy

Use VFD variable frequency drive, a setting will be
5,10,15,20 30,50 hertz.

Answer / ranjay singh

by the change in no. of poles as well as speed of rotor on
which field wng is mounted.

which gas is filled in CFL

7 Answers   Lumax,

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explain which quantities change in the starting and the and the running condition in induction motor

0 Answers   Gulf Spic,

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How to Calculate Transformer Earthing Electrode Rod Size both Body and neutral Earthing ? Any Standard Formula? Please Suggted

0 Answers   EnPro,

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How to calcute the cable size for both HT and LT please specify the formula for that Regards Chethan C

1 Answers   Bhel, Student,

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there is a # KVA Transformer of 11 KV/440V, in simple(not use formuia) how can you calculate it's HT & LT side current.

5 Answers   Construction, wbsedcl,

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as we know that N=120f/P speed of an im can be controled only through changing no if poles, can we control by changing the frequncy????

7 Answers   JSW,

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What are safety seals?

1 Answers   HSL,

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what is ring system ?

3 Answers   Bhel, Sabic,

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WHAT IS THE FUNCTION OF RCCB

2 Answers  

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what is slip?

3 Answers  

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can transformer develop three phase poer from a single phase source?

2 Answers  

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why transformer rated in KVA not in KW ? we know that W= v*i

6 Answers  

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