I need to drive resolver with follow characteristic :
Resolver Pair Poles = 6 ( means 3 KHz freq on SIN COS signal at 30000 RPM )
EXC Impedance = 50 Ω ( @ 10 KHz)
EXC Voltage required = 7 VRMS
PGA411 Resolution = 12bit
With previous characteristic if suppose F exc = 10 KHz IOE1 = (7 * 1,41) / 50 = 198 mA ( Low margin to overcurrent threshold , high power dissipation on PGA )
With previous characteristic if suppose F exc = 20 KHz IOE1 = (7 * 1,41) / 100 = 99 mA ( good margin to overcurrent threshold , lower power dissipation on PGA )
With both configuration ( see attached picture), i note distorsion on EXC output of PGA411 during zero crossing of current signal, this can be dangerous on angle estimation ?, what is the reason of this distorsion, is ASIL D angle acquisition guaranteed also with distorsion ?
Waiting for your answer
Best Regards
