VVVF Drive meaning is Variable Voltage Variable frequency drive. It is used to three phase induction motor and some type of single phase motor can be used. It is used to variable speed in Same voltage. It is change the motor frequency in constant voltage.

AC vvvf drives means alternating current variable voltage variable frequency drives its name itself indicates that here the frequency is changing,also calld as variabl frequency drive,converter, inverter, in which voltage belongs to dc bus of drive & speed belongs to switchings of IGBTs there is only DC Drives & no Dc VVVf drve, another name is

vvvf-variable voltage variable frequency drive vvf- variable voltage frequency drive the diffreance between this two drive is in vvvf if u vary the voltage frequency eill also vary but in vvf only voltage will vary.. ex:- ABB drives are vvvf drives

Answer / vinod. smooth start and stop. no jerking of load. exact posiitoning better protection for motor. high/low speed selection.

I am getting diesel genset 62 kv for my house In addition there are 6 meters of 11kv for the house Lift also being installed for house plot sise 200sq yds total 4 + 2 foloors I want to know how much earthing required how deep it should be

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Answer / gkg. For Active load,voltage will be 48vdc or 24vdc, so total active load=48v x 28A =1344w =1.34kw ...

i want to ask that as everybody knows that in star connection on star point is called neutral. my question is that why on that poin called neutral. what is the reason behind it. what is the logic behind it. i heared somewhere that on this point all phases current become zero thats why. if this answer is right then prove why on that point is current become zero. if …

Answer Posted / carl_ellis 100 in H2O = 80 MMSCFD x = 120 MMSCFD Maximum flow rate is the square root of the normalized