Rating; The Alternator - Triumph SPEED TWIN 1945 Workshop Instruction Manual

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A.C. Generator
Since, with the ignition switch at
" E M G
and the engine running, the battery receives
a charginglcurrent, the battery voltage soon begins t o rise. The rising voltage
opposes the alternator voltage, gradually effecting a reduction i n the energy available
for transfer t o the coil. I n the event of a rider omitting t o return the ignition key
from position "EMG" t o position "IGN" this reduction in spark energy will cause
misfiring t o occur and will remind the rider t o switch over t o normal running.
As previously mentioned, continuous running without a battery is readily arranged
by earthing the cable normaliy connected t o the battery negative terminal.
C O N S T R U C T I O N
The alternator consists essentially of a spigot-mounted and bolted 6-coil laminated
stator with the centre-bored r o t o r carried on; and driven by, an extension t o the
crankshaft. The rotor has an hexagonal steel core, each face of which carries
a
high
energy permanent magnet keyed t o a laminated pole tip. The pole tips'are riveted
circumferentially t o brass side plates, the assembly being cast in aluminium and
machined t o give a smooth external finish. The stator and rotor can be separated
without any need t o fit magnet keepen t o the rotor poles.
R A T I N G
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The alternator is designed for use with headlamp bulbs not exceeding 30-watts rating
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(or equivalent Continental touring bulbs which, although of higher wattage rating.
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are yet suitable due t o the generally higher average road speeds encountered abroad).
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T H E A L T E R N A T O R
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Except for an occasional inspection of the snap-connectors i n the three green output
4
cables-these connectors must be clean and tight-the alternator requires no
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maintenance.
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HOLES FOR
F I X I N G
BOLTS
POLE
CORES
COILS
EXTERNAL SPIGOT
LOCATIONS
STATOR
Fig. 69. A L T E R N A T O R (Model RM14)