Rotor

• 1 Rotor electro-magnetic circuit
• 2 Assembly rods
• 3 Rectifier side support
• 4 Negative heat dissipation plate
• 5 Positive heat dissipation plate
• 6 Zener type pressfit power diode
• 7 Manifold
• 8 Regulation unit
• 9 Heat shield cap
• 10 Rectifier side bearing
• 11 Rectifier side inner fan
• 12 Stator electronic circuit
• 13 Control side support
• 14 Control side inner fan
• 15 Control side bearing

The alternator is a rotary machine which transforms mechanical energy into electrical energy.

Like all electric machines, it basically consists of two parts: a rotor and a stator.

The diagram below shows the rotor for an alternator with internal ventilation.

The rotor is composed of a cylindrical magnetic core, concentric to the drive shaft, which has a toroid coil and two opposing magnetic impellers which are magnetized by the winding in the actual core.

The impellers have six, claw-shaped, poles each, which interpolate reciprocally so that there are alternately six North poles and six South poles. There is therefore a single rotor winding which produces the e.m.f. for all the partial magnetic

circuits.