Hello everyone
currently i am researching to design an NMEA to synchro signal converter. but I don't know how this conversion principle works. I also don't understand how to control a selsyn with a microcontroller.
Can anyone help me or provide me with documentation on this issue. I would like to thank everyone very much.

 

If you don't have spec's on the unit you have, Just rotate it and measure the generated 3ph

 

That's a complex digital to analog converter project. The signal decoding and 60/400Hz three-phase + driver coil outputs could be handled with a 32-bit processor board like this if you need high precision positioning and signal generation but the programming is not trivial but you can sorta fake the drive signals using a Arduino uno or something like that. There just is not much simple DIY information on building things like this.
https://forum.allaboutcircuits.com/threads/pic32mk-mc-qei-example.150351/post-1538575
https://github.com/nsaspook/vcan/blob/vcan_mcm/pic32mk_sch.pdf
https://github.com/nsaspook/vcan/blob/vcan_mcm/pic32mk_brd.pdf

The board has two RS232 and one RS422/485 ports for communications.

https://en.wikipedia.org/wiki/NMEA_0183
https://gpsd.gitlab.io/gpsd/NMEA.html

https://www.analog.com/media/en/tra...ooks/synchro-resolver-conversion/Chapter4.pdf