If there is no reading, or a very low reading, then check that the series connections
(1B-4A, 2B-5A, 3B-6A) are correct. If all these connections are good, then it is
possible that one coil has been reversed (placed upside-down).
If any coils have been reversed, then it is necessary to do another test (see diagram
45), to find out which one is at fault. Connect 4B-2A and 5B-3A as shown in the
diagram. Now test between 1A and 6B. There should NOT be more than a very small
voltage. If there is a voltage, or the bulb lights up, then reverse the connections
(swap A for B) on the coils until the voltage drops to a very low level.
When the faulty coil has been found, label the tails again, with A and B at the correct
ends.
45. CHECKING FOR A REVERSED COIL
WIRING
DIAGRAM
CIRCUIT
SCHEMATIC
DIAGRAM
1B BLOCK
4A CONNECTOR
2B
SERIES
CONNECTIONS
BULB OR
METER
5A
3B
6A
1A
4B BULB
2A
5B
ACV 100
10
3A
1
6B MULTIMETER
There will always be a small voltage in this test, because the coils are not perfectly
positioned in the mould. If the test gives more than one volt, then it should be
possible in future to make a better stator by placing the coils at exactly equal
distances apart in the mould.
DC output test
When these tests have been completed and the results are correct, then connect the
rectifier, as shown in diagram 46. Connect the tails 1A, 2A and 3A together.
Connect each of 4B, 5B and 6B to any three of the rectifier AC terminals (marked
with 'S' symbol). This is the 'star' connection. Connect a bulb to the output. If
possible, also a multimeter on 10 VDC (or similar).
PMG manual
page 43
June 2001