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Answer Posted / nitin pathak
Basically a VFD consists of 3 main components
1)six-pulse rectifier that converts three phase AC voltage
to DC voltage
2)capacitior bank for energy storage which stabilizes the
intermediate circuit DC voltage.
3)six-pulse IGBT inverter that converts the DC voltage to
AC voltage and vice versa.
The motor operation is controlled by changing the firing
angle(switching) of the IGBTs
Nitin Pathak
Lafarge Cement
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