what is the principle of vvvf drive motor

Question Posted / guest

3 Answers
28152 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

what is the principle of vvvf drive motor..

Answer / jignesh parmar

IN MOTOR FLUX IS DIRECTLY PROPORTIONAL TO RATIO OF VOLTAGE
Vs frequency, i.e v/f it is derived from bellow formula
e= V = 4.44*flux*no. of turn*frequency
motor speed = 120*f/p
i.e speed can be ccontrolled by variying
frequency , but if only frequency increases then flux will
also increse,& flux increse beyond some level it cause
saturation also increse of flux increse loss, so to
maintain constant flux voltagge is also incresed in same
propotion to frequency as flux is directly proportion to
ratio of voltage/frequency i.e (v/f)
and that is called as variable voltage variable frequency
drive

Is This Answer Correct ?

79 Yes

17 No

what is the principle of vvvf drive motor..

Answer / nsnaidu

flux is directly proposnal to voltsge

Is This Answer Correct ?

14 Yes

2 No

what is the principle of vvvf drive motor..

Answer / kishore

flux is directly proposnal to the voltage.

Is This Answer Correct ?

1 Yes

3 No

Post New Answer

More Electrical Engineering Interview Questions

what is the diffrence between earth and neutral.

1 Answers

If we impress a dc voltage of 230 V on an unloaded 230 V, 50 Hz transformer it wi A give high secondary voltage B burn out C give secondary voltage as per K D none of these

1 Answers

What is differance between alternator and generator?

4 Answers IOCL,

Why we are not placing c.B 's btwn generator and transformer.? what happens when generator gets disconnected from transformer when it is running @ full load?

3 Answers Areva,

What happen to alternator if prime mover fails?

4 Answers

how to find out this one mcb r mccb?

4 Answers L&T,

Circuit diagram of tube light without starter using electrical choke

0 Answers

what is high - pot test. what's its use?????

0 Answers

Why Earthin is not required in Xformer primary side when it is in Star / star?

2 Answers

what will happen if instead of neutral we use earth wire as return conductor?if we can use ,then why we are not using in our day to day appliances?please justify the answer

11 Answers NTPC, ONGC,

can i use 4 number of circuit breaker as single phase manual change over switch? if yes then how plz also send ckt diagram at nazimzamurad@gmail.com

0 Answers

what is transformer?

2 Answers

For more Electrical Engineering Interview Questions Click Here