On 12/03/2014 05:42 PM, Leonardo Marsaglia wrote: > Hello to all again. > > We're defining the hardware for the Mazak conversion and yesterday my > brother and I measured the resolver signals to identify what voltage and > frequency they use. I've been reading some information about resolvers and > it's not too difficult to understand the way they work, anyway I have a > little doubt with respect to the measurements on the excitation part. > Here's what we've got from them: > > Between Sin + and Sin - there's 12 volts and a 4.5 khz frequency. Same > thing happens on Cos + and Cos - and there's the 90° phase shifting between > the two of them. There are basically two ways to run resolvers. You can excite the rotor and get two varying voltages from the stator coils. These will generally be in phase with the excitation, or 180 degrees out of phase.
Or, you can excite the two stator coils with signals that have some phase relationship, (usually 90 degrees) and measure the time of the zero crossing of the rotor signal, which will be roughly constant amplitude. it sounds like this system may be using the excite the stator scheme. Jon ------------------------------------------------------------------------------ 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
