How to test/check a Resolver ? thanks in advance

[phatcreators]

How to test/check a Resolver ?

How to get to know that the Resolver is bad or producing problems ?

thanks in advance

 

[chuckey]

A resolver is like a precision generator in that it produces an electrical output in relationship to its angular displacement. Old fashioned ones were used with a synchronised motor. Both were fed with 3 phase and a pair of windings were connected from one to the other. When the resolver was turned the synchro followed. Now a days the resolver is really an angle measuring bit of kit with an output that follows the angle displaced either in digital numbers or an analogue voltage.
So if the resolver is rotated continuously (slowly- they have a speed limit), its output should be checked for the complete digital numbers (no stuck bits) and if analogue, using the two analogue voltages as the X and Y deflection on an oscilloscope to get a lissajous figure to check for no limiting and the full phase rotation.
Frank