Dear Sachin,
Does this question pertain directly to the FIRST competition or using LabVIEW for FRC?
It sounds to me like this is a general LabVIEW programming question, and as such would be better suited and have a much better chance of being addressed here: http://forums.ni.com/ni/
To briefly answer your questions,
1) If you have the appropriate data for the flux density and flux intensity (perhaps as arrays of data) then it's simply a matter of using the xy graph indicator in LabVIEW to plot your data. You can find examples of how to do this from the LabVIEW Example Finder, which you can access from the Getting Started Window.
If you need to know how to actually take this data using hardware and LabVIEW, then you'll need to provide some more details, and should probably post back in the LabVIEW discussion forums linked above.
2) As to the AC Induction motor
You will need a drive that can acutally send the signals to commutate the windings appropriately. It's really the drive specs that you need to look at, and at what command signals it accepts.
Best Regards,
Nate H.
National Instruments
Applications Engineer
