Triumph TR6 PI Operation Manual page 448

KEY TO ALTERNATOR WIRING DIAGRAM
DELCO REMY TYPE DN460
ELECTRICAL
1
Stator windings
2
Live side output diodes
3
Earth side output diodes
4
Field winding supply diode trio
5
Brushes and slip rings
6
Field winding
Rl Resistor Restricts TRI base current supplied from diode trio
TRI Transistor Controls field winding earth return circuit
R2 Resistor and thermistor Potential divider which senses battery reference voltage.
R3 Resistor Thermistor causes voltage to vary with temperature.
ZD Zener diode Voltage sensitive component. Opposes passage of current until
breakdown voltage is reached. Controls TR2 base current.
TR2 Transistor Controls TRI base current by diverting current passing
through Rl to earth when ZD is conducting
Cl Capacitor Smooths voltage across R3
R4 Resistor Prevents excessive current through TRI at high temperatures
D3
Surge quench diode Connected across field winding. Protects TRI from field
winding high induced voltage surge and smooths field winding
current.
Dl Diode Provides a fixed voltage drop which together with the voltage
drop across the base emitter of TRI ensures that the
saturation voltage of TR2 will completely turn off TRI
Triumph TR6 Manual. Part No. 545277 Issue I
86.10.00 Sheet 6