Filter
Top Products
– 17 –
(2) ROTOR ASSEMBLY
1) Field coil
Measure resistance between the slip rings.
Slip ring
Rotor
4-4) CHECKING FUNCTIONAL MEMBERS
(1)STATOR
Measure the winding wire resistance. Check the
resistance of the wires that comes out from the stator
using a tester, referring to the following table.
NOTE: When measuring according the numerical value
shown in the chart, tolerance should be
considered because the inaccuracy of the tester.
If an accurate value is needed, measure by
electric resistance using an Ohm-meter.
While doing this, use caution to avoid contact
resistance.
AC 240V
Specification
Color of the wires
7.7 Black-White
Unit ; Generator wire resistance
3.1Yellow-Yellow
1.2
Brown-Brown
DC coil
Exciter coil
Main coil
AC 230V
Specification
7.4
3.1
1.2
AC 120V
Specification
1.7
2.7
1.2
35
Resistance ( )
Field coil
(Between two Slip rings)
2) Cleaning Slip rings
The slip ring surfaces must be uniformly bright.
Slip rings showing black spots, excessive wear, or
uneven wear must be repaired.
A stained slip ring lowers generator efficiency and
output voltage.
Polish the slip rings with fine sandpaper while turning
the rotor until rough spots disappear.
NOTE :
When measuring, tolerance should be considered
because of the tester inaccuracy, winding
number variation, ambient temperature etc.
Rotor
Slip ring
Sandpaper
NOTE : Care should be taken not to touch the rotor
coils with the sandpaper.