I would like to know how to determine A1 and A2 in Equation 4 of monitor voltage
We can imagine A1 and A2 are the maximum amplitudes of sin and cos.
However, although information can be obtained without error even with stationary position information, it is not known how A1 and A2 are determined at this position.
In this case, after applying power, apply a fault reset and take enough time to acquire the position information. We were able to acquire position information even halfway position where the resolver position is not 0 degrees and 90 degrees.
If it is stationary, I think A1, A2 do not know the maximum amplitudes of sin and cos.