The Electric Motor #
An electric motor converts electrical energy into mechanical energy (motion). Found everywhere from home appliances to electric vehicles.
Working Principle #
A current-carrying conductor in a magnetic field experiences a force (Lorentz force): \(F = B \cdot I \cdot L\)
Main Components #
| Component | Function |
|---|---|
| Stator | Fixed part, provides magnetic field |
| Rotor | Rotating part, turns due to electromagnetic force |
| Windings | Copper coils carrying current |
| Commutator | Reverses current in rotor (DC motors) |
| Brushes | Contacts bringing current to commutator |
| Shaft | Transmits motion |
Efficiency #
Electric motors are highly efficient: 90-97% for industrial motors vs 25-35% for combustion engines.
Conclusion #
The electric motor is a simple yet brilliant machine. Thanks to its high efficiency and versatility, it’s the protagonist of the energy transition toward a more sustainable future.
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