I am looking at predicting the RMS current of a DC motor at a given cycling frequency. It's not so straight forward to me because the current is not linear, but always changing. The motor will rotate about 20 sec in CW direction, brake and hold its position, rotate about 20 sec in CCW direction, and then brake and hold its position. Without using any type of model or recording the current traces, would I be able to calculate this. I'm sure someone had to compute something similar to this in the past. If so, is there a generic equation I can use for this? The given information I have is the parameters of the motor.