In an electric vehicle, what is another common term for the traction motor?

• A. Alternator
• B. Dynamo
• C. Motor-generator
• D. Starter

Answer: (C)

The traction motor in an electric vehicle is the propulsion device that converts electrical energy into mechanical torque to turn the wheels. In many EV designs, the same machine can also operate as a generator when the vehicle slows down, sending energy back to the battery through regenerative braking. This dual capability is captured by the term motor-generator, which describes a device that can function both as a motor and as a generator. The other terms refer to devices not used for the EV’s propulsion: an alternator is a generator used in gasoline vehicles to charge the battery, a dynamo is an older word for a generator, and a starter is used to start an internal combustion engine.