I have a ferrite 12V to 36V transformer driving a purely inductive load near the maximum load capacity of the transformer. The inductance of the load is much less then the transformer secondary inductance. Twelve volts is placed across the primary for a period of time T1, and the magnetization current ramps to somewhere near the saturation knee. Next, the primary is open-circuited into a clamp to keep the primary difference voltage equal to, or below +/-12 volts. How long does it take to reset the transformer flux to zero? Or what voltages and currents are found in the primary and secondary?