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

why do we prefer alternating current in india where as in USA prefers DC?

3 Answers   Bhel, GMR, Texmo,

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What is the technical difference between On delay timer and a Star delta timer?

0 Answers   Roche,

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what is the diffrence between voltage and current?

11 Answers  

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what will happen if ac motor given dc supply?

1 Answers  

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why star connected transformers used in tneb?

1 Answers  

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difference between silent and non silent pole rotor?

3 Answers  

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I want to merge a cable..in between two metering Cubicals which contains CT's and PT's and Energy meter..before taking merger..what are the common things required?

0 Answers  

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A single line diagram(SLD) and a purchase order of a 11/66kV switchyard of a power plant was given. In the SLD, only one lightning arrestor(LA) was shown, but the purchase order had need of 3 LAs. Is this correct, if yes, why?

2 Answers  

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i have 500 amp inductive load of motors ,,,pleas tell me how can i calculate for capacitor bank for improving my power factor to 99 .....calcullations for capacitor bank,,,,

0 Answers  

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What is the maximum load an electric engine can pull??

3 Answers   Oil India,

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Why transformer rating in KVA? and Generator also?

6 Answers   Bhel, IEEE, Toyo Denki, Toyo Engineering,

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how to reduce humming noise in transformer?

3 Answers  

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