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.

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