good morning to all sir,

there is lots of doubt in vfd so plz send me explain of vfd mechanism and operation of VFD.
plz send me its block dia. also.

 

When asking for help, it is a good idea to be as polite as possible. Your lack of capitalization, plus abbreviations (especially "please") show a general lack of respect. If you can't even take the time to be polite, should we really take the time to answer your question? I'll forgive the bad grammar if you're not a native English speaker.

You tell us nothing about your application. That makes it very difficult to tell you anything useful. Here's the short version; a variable frequency drive (VFD) is an electronic device for controlling a motor. In particular, a VFD can run a motor at speeds other than it's nameplate base speed, and can change speeds with a ramp time rather than a sudden start or stop.

Beyond that, I could teach a semester-long class in all of the variations and capabilities of VFDs and related components. Tell me what you're trying to do and I can narrow it down a little bit better.

As for a block diagram, virtually all VFD manufacturers have user manuals that include every type of diagram you could possibly want. Again, if there's something specific you'd like to do we can try and pinpoint one that's appropriate.

Ask a better question, get a better answer.

-James Ingraham
Sage Automation, Inc.

 

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