DC and AC Charging System Principles Topics covered in this presentation: DC Generator Construction and Magnetic Principles Alternator Construction Magnetic Principles of the Rotor and Stator next

Typical DC Generator Construction Cooling fan Front bearing assembly Commutator Housing with pole shoes Drive pulley Front casing Brush Armature End housing and brushes next

DC Generator Magnetic Principles Magnets (pole shoes) Conductor (armature) Split ring segments (commutator) Battery Carbon brushes next

DC Generator Magnetic Principles Magnets Conductor Output voltage (no split ring) Split ring Max +V Output voltage Peak to peak voltage Max -V next

Typical Alternator Construction Rectifier assembly Brush box and regulator Slip ring end housing End cover Drive pulley Cooling fans Stator Rotor next

Magnetic Principles of Operation Winding Voltmeter Laminated soft iron core North yoke South yoke Rotating shaft next

Magnetic Principles of Operation Galvanometer Laminated soft iron core Flux lines Output voltage Magnet rotates 90° further Conductor winding Magnet Magnet rotates next

Rotor Construction Supply connections North pole claw Slip rings and brushes South pole claw Field windings next

Rotor Magnetic Field Stator windings Curved flux lines next

Stator Windings and Magnetic Principles 1 Stator windings (3) 2 3 North pole flux lines, current flow direction indicated by + and - South pole flux lines, current flow direction indicated by + and - 3 2 1 Max emf generated in winding 1, reduces as magnet rotates Emf generated in all 3 windings next

Stator Construction and Coil Connections 3 outputs Unrectified output waveforms Delta Star Enamel copper wire windings Soft iron laminations end