Permanent magnets are made from rare‑earth elements and stay magnetic without power.
Electromagnets need electricity to create a magnetic field, which can waste energy.
Using iron instead of permanent magnets decreases overall motor efficiency.
Reduced efficiency means more battery drain and shorter driving range.
Strong starting torque is necessary for the car to move smoothly from a stop.
Researchers have tried swapping these magnets for electromagnets or simple iron pieces.
Such replacements reduce the motor’s efficiency, lower the starting torque, and limit maximum speed.
Because of these performance losses, manufacturers continue to rely on rare‑earth magnets.
These magnets provide the strong magnetic field needed for powerful, efficient electric vehicles.
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