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

i want to know how to determine that a surge arrester work properly in 11kv system. and how to test a 12kv surge arrester

0 Answers  

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what is relay

15 Answers   HPCL, IOCL,

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can we connect 2.2kw star motor in delta passion?

1 Answers   Zuari,

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explain the existence of reactive power in electrical engg?when it generates?

1 Answers  

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why one side of tubelight glows after switch off ?

1 Answers  

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what is the purpose of %impedance for transformer

3 Answers  

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what is the differation bewreen kwh & fundamental kwh in electronic trivector meters

0 Answers  

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some meggers have three terminals. wat is the real function of the earth terminal?

2 Answers  

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What is the bundle conductor?

0 Answers  

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what is inter connected dc generator?

0 Answers   Lovely Professional University,

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what does a string of resistors in a series will do?

0 Answers  

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Basic philosophy of applying 3P tripping for uptill 132KV switchyards & for 132KV & above 1P/3P tripping is used.

1 Answers   L&T,

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