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Electromagnetism

Electric and magnetic fields, charges, and the forces that shape our electrified world.

Lessons

Principles of Electromagnetic Induction: The Lenz-Faraday Interaction

Understand how changing magnetic flux induces electromotive force and drives modern electrical power systems.

Challenges

Eddy-Current Levitation Stabilization

Design and construct an active electromagnetic suspension system capable of maintaining a stable equilibrium for a conductive disk using only passive eddy-current damping and a feedback-controlled solenoid. You must characterize the magnetic field gradient and tune your PID controller parameters to minimize low-frequency oscillation within a 20mm air gap. The final validation requires demonstrating sustained levitation while applying a controlled mechanical perturbation to the disk.