Current Control for Variable Inductor

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hi everyone;

i have project variable inductor. try keep inductor @ linear region. this, use secondary winding on toroid. when current on first winding exceeds limit , inductor reaches saturation region, want give negative current secondary winding balancing net current

for example, critical current 2 amps. , apply 2.5 amps. after level, desire apply 0.5a current secondary winding stabilizing inductance value. can arduino uno ?



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