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Answer Posted / ashish umrao
vfd use only variable freqancy derive moter speed proposnal
to the freqancy ns=120f/p if freqancy is vary to moter speed
also vary ,speed touqe is inversaly prosnal to each other.if
speed is high ,touqe is low &vise versa.current is proposnal
to the load is cunnected so load is high current high and
touqe also high.if can change the sutable ferqancy to save
the energy.
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