ELE. - 46
DEVICES
Ω
STATOR
There are three types of failures of magnetoelectric generator
(stator):
• Short circuit
• Line break (wire burnt)
• Rotor Magnetic Disappear.
Short circuit or open circuit of coil wires that cause low output or
even no output.
Disappearing of rotor magnetism will lead to low output, which
may be caused by AC electric generator or striving. Or it may be
because of aging.
Close the ignition switch
Disconnect:
• The connector of the 3-pole magnetoelectric generator.
Measure:
• The resistance value among the three black terminals of
the magnetoelectric generator with a multimeter.
Standard
0.18 Ω ± 0.01Ω to 25°C
• If the resistance is greater than the aforementioned values,
oritisnotpossibletomeasure(innitevalue)oneofthe
two wires using the multimeter, it shall be replaced. When it
is far lower than the resistance, it refers to stator short-cir-
cuit. It shall be replaced.
• Measure the resistance between every single black wire
and frame grounding with a multimeter in the highest resis-
tance range.
• Use tester coil to check whether the engine is through.
If yes, it refers to short-circuit of coil and engine and the
charge coil shall be checked.
• If the resistance of stator coil is normal, but the voltage
check detects a failure of the magnetoelectric generator, the
rotor magnets might have become loose. At this moment,
replace the rotor.
Start up the engine:
• Run the revolutions per minute (rpm) according to Table 1.
• Record the voltage readings (three measurement values in
total).
Table 1 Output voltage of magnetoelectric generator
Range of tester
Wiring
Readings at
5000 rpm
Tester (+) to Tester (-) to
750 V AC Black wire
Another black
wire
55 V or high-
er
NOTE:________________________________
If the output voltage indicated is within the value of the
table, the magnetoelectric generator works properly.
If the output voltage indicated is much lower than the value
within the value of the table, problems occur on the gener-
ator.
1
2
3
A
COPY - Moto GB - Grant Martland - grantmartland@motogb.co.uk
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