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arunbabu
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VFD & VVFD

09/22/2010 11:52 AM

What is differance bettwen VFD & VVFD please explain.

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PWSlack
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#1

Re: VFD & VVFD

09/22/2010 12:03 PM

The second one varies the voltage as well.

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JRaef
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#2
In reply to #1

Re: VFD & VVFD

09/22/2010 12:24 PM

Well, technically, but in reality the terms are used interchangeably. There are no motor drives that change only the frequency, it's implied that when you change the frequency you have to change the voltage as well. So VFD has become shorthand for VVFD.

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msamad
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#3
In reply to #2

Re: VFD & VVFD

09/22/2010 9:11 PM

AFD (Adjustable Frequency Drive)

VSD (Variable Speed Drive)

VFD (Variable Frequency Drive)

VVVFD (Variable Voltage Variable Frequency Drive)

All of the above acronyms are used to indicate the same thing, while VFD is the most common in use.

But I don't know the relationship between VFD and VVFD. Most probably, the VVFD is the OP's typo for VVVFD.

- MS

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JRaef
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#4
In reply to #3

Re: VFD & VVFD

09/23/2010 12:09 AM

Oh, missed that... I thought it looked a little funny.

But just because I have a tendency to be pedantic, VSD (or ASD) can also mean a DC drive, an eddy current drive or even a mechanical variable speed drive (Vari-Drive).

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