Answer / gennadiy

Yes, the voltage in the simpliest V/f control is decreased proportionally with the speed decreasing. V~f in linear V/f control and V~f*f in parabolic V/f control (for pumps and fans).

Answer / h s sandhu

VFD means variable frequecy drive,If voltage is reduced then speed will reduce.

Answer / devinder

No effect on motor speed.
N=120F/p

Answer / uditparashar

ifbthe motor is running in constant torque mode then decreasing the voltage will result in increase in frequency hence speed will increase in constant torque mode otherwise speed will decrease

what is d meaning of inrush current of a trafo ? how u can calculate this ?

1 Answers   Jindal,

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if 15 kv is grounding directly what will happen?

5 Answers  

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if any house we instaled a 1.5 ton ac and its phase cable of wiring is installed but netrual cable of wiring not instaed. my question is that is neutual of house(for other wiring is capable for ac load or a sepeart neutrual wiring required

0 Answers  

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what is an isolation transformer??? what is its purpose??? what happens if it is not used where it should be used?????

2 Answers  

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why we connect dg neutral with ground?

1 Answers  

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What happens when generator is running with leading power factor on it say -0.96. what are the effects of it on alternator and the other generators operating in parallel to it.

2 Answers  

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what is the power ratio between power in star and delta circuit?

3 Answers  

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how many hvdc lines in india???

0 Answers  

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What is slope...? Explain slope 1 and slope 2...?

0 Answers  

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HOW DG WORKS ?

3 Answers  

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what is thresold of perception

0 Answers  

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A distribution transformer giving afrequency of 200HZ, where it is rated for 50HZ. when it will occure?

2 Answers  

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