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 electrical?

15 Answers  

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What are linear and non-linear systems?

0 Answers  

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voltage at generation stage is usually- ? a.11kv b.33kv c.66kv d.220kv

12 Answers  

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which calss ct's,pt', use protection,meatering and others

1 Answers  

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what is difference between ac voltage and ac current

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Name two low frequency oscillators?

0 Answers  

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What is the purpose of SSVW, IOVW, DVDF Tests in transformer? Those who are answering, pls send mail ids also.

1 Answers  

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why dc series motors never start without some load, and what will happen if starting with out load..

1 Answers  

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WHAT is the no of starts/hr for 3.3 KV, 300 KW motor. Motor is vertical flange type.

1 Answers   DAE, Siemens,

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Following test should be conducted to find out relative polarity of transformenr terminals A no load test B back to back test C phasing out test D none of above

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Which types of following motors are most efficient?

0 Answers  

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