2014-12-04 13:03 GMT-03:00 Jon Elson <el...@pico-systems.com>: > Yes, resolvers are transformers where the coupling between > rotor and stator coils > varies as the shaft is rotated. You can excite the stator, > or the rotor, the resolver > really doesn't care. > > The excite the rotor and read the two stator outputs > requires sensitive A/D converters > and logic that maps the result to sine and cosine angle > values, but is quite accurate. > > The excite the stator and read zero crossing time from the > rotor is very non-linear, > so you need a correction table to convert to the exact > angle. So, it LOOKS a lot > simpler, but to get the same level of accuracy, you need > about the same complexity. > Fortunately, Analog Devices has reduced the whole thing to > an $18 chip. >
Thanks a lot again Jon for making things clear for me. So the easiest way to go would be running them like normal resolvers feeding the excitation winding. Is there any method to know the ratio of the coils? Without unwinding the coils off course. I'm far from being an expert in electric machines, but I guess this is not like a normal stationary transformer where the voltage varies proportional to the transformation ratio, but the angle gives a difference in the amplitude too is that right? -- *Leonardo Marsaglia*. ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=164703151&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
