Which device in a vehicle charging system is small and lightweight?

Which device in a vehicle charging system is small and lightweight?

• A. Dynamo
• B. Stator
• C. Alternator
• D. Armature

Answer: (C)

In modern vehicle charging systems, the alternator is the small and lightweight piece. This is because the heavy magnetic field is carried on a compact rotating rotor, while the power-generating windings sit on the stationary stator. The output is produced in the stator and then rectified to DC, which allows the unit to be brushless and lighter than older designs. A dynamo, with a larger armature and a heavier rotating winding, is bulkier and heavier, and a rotating armature in older setups adds serious mass. So the combination of a light rotating field and stationary windings makes the alternator the compact, low-weight choice for charging the system.

In modern vehicle charging systems, the alternator is the small and lightweight piece. This is because the heavy magnetic field is carried on a compact rotating rotor, while the power-generating windings sit on the stationary stator. The output is produced in the stator and then rectified to DC, which allows the unit to be brushless and lighter than older designs. A dynamo, with a larger armature and a heavier rotating winding, is bulkier and heavier, and a rotating armature in older setups adds serious mass. So the combination of a light rotating field and stationary windings makes the alternator the compact, low-weight choice for charging the system.