1. Further AC Charging Systems
Topics covered in this presentation:
Stator Voltage Rectification
Rotor Field Excitation
Stator Voltage Regulation
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2. Single Phase Rectification
Rectifier diodes (4)
Output from AC source D4 D1
2 diodes conduct D3 D2
2 diodes conduct
Battery
180
360
Completely rectified waveform
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3. Three Phase Rectification
Bar magnet (rotor)
Stator
Rectifier diodes (6)
Rectified stator output
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4. Field Excitation - Battery
Ignition switch
Field isolation relay A B
Rotor
Battery
Stator
Rectifier diodes
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5. Field Excitation - Self
Charge warning lamp
Ignition switch
Stator
Rotor
Battery
Rectifier diodes (6)
Field diodes (3)
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6. Basic Voltage Regulating Circuit
Rotor
Battery
Low/correct voltage level = T2 conducts, field current flows
High voltage level = T1 conducts, T2 off, no field current flows
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7. Regulator Voltage Sensing Points
Machine sensing connection at rotor (IND)
Battery sensing connection
Machine sensing connection at output (A+)
Ignition switch
O/P
Solenoid
Rotor
Alternator
Battery
Regulating circuit
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8. Typical Alternator Circuit
Charging lamp and ignition switch
Rotor
Rectifier
Regulating circuit
Solenoid
Battery
Stator
Field diodes
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