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FORMULA 1 TECH
Breakdown: The Core Physics of Induction
During this phase, the MGU-K acts as a high-performance synchronous AC generator. Here is how the mechanical forces translate directly into electrical current:
- Magnetic Field Rotation: The rotor (equipped with permanent magnets or field windings) is driven by the car's kinetic energy through the gearbox, spinning at speeds up to 50,000 RPM.
- Flux Interception: As these powerful magnetic fields sweep past the stationary copper coils (stator windings) housed tightly around the rotor, the magnetic flux passing through the loops of wire changes continuously over time.
- Voltage Induction: Per Faraday's law of induction, a changing magnetic environment across a conductor induces an electromotive force (EMF), generating an alternating current (AC) within the stator phases without any physical contact required.
- Regenerative Braking Resistance: The electrical load created by drawing this current provides the necessary electromagnetic resistance. This opposing torque is what actually slows down the rotor—turning raw kinetic energy into usable electrical power while assisting the physical brake pads.

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