The main features of electric traction is High mechanical strength High mechanical strength.

The electric motors used for traction purposes have both mechanical and electrical features.

Mechanical features:

1. Mechanical strength and robustness: A traction motor must be able to withstand severe mechanical vibrations.

2. Enclosed design: The traction motor should be completely enclosed to protect against dirt, dust, mud, etc., especially when placed beneath the locomotive.

3. Small diameter: The traction motor must have a small diameter to allow for easy installation beneath the motor coach.

4. Lightweight: The motor must have a minimum weight to reduce the overall weight of the locomotive and increase its load-carrying capacity.

Electrical features:

1. High power and torque density: A traction motor must be able to deliver high power and torque density to propel the vehicle.

2. Wide speed range: The motor should be able to operate over a wide speed range to provide good performance at different speeds.

3. High efficiency: The motor should be highly efficient to reduce energy consumption and increase range.

4. Regenerative braking capability: The motor should be capable of regenerative braking to recover energy during braking and improve overall energy efficiency.

5. Robust insulation: The motor should have robust insulation to protect against voltage spikes and ensure reliable operation.