Dc-Motor Neutral Zone Adjustment; Types Concerned; Summary; General - ABB DCS 500B Service Manual
Dcs thyristor power converters
for dc drive systems
25 to 5200 a
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Also See for DCS 500B:
- Operating instructions manual (76 pages) ,
- Description (228 pages) ,
- Service manual (73 pages)
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DC-Motor neutral zone adjustment
Types concerned
Summary
General
DCS 500 / DCS 600 Service Manual
DC-Motors
Procedure to adjust the neural zone of a DC-motor
-
Loosen the bolts holding the brush bridge.
-
Connect a scope or a voltmeter between two adjacent brush-
holder assemblies (holders with different polarity).
-
Set the scaling on the scope or voltmeter to mV AC.
-
Disconnect the excitation cables and connect 110 – 240 VAC
between F+ and F- (a normal extension cord is sufficient).
-
Start moving the brush bridge slowly in one direction and watch
the scope or voltmeter. If the voltage is increasing move the
brush bridge in the other direction.
-
Try to get the voltage down to less than 50mV AC. The less the
better.
-
When this is achieved, start tightening the brush bridge bolts
and watch the voltage. Sometimes you have to do a little offset
to compensate for movements during tightening.
-
Finally, mark the correct neutral zone position in case the motor
will be taken apart in the future.
3ADW000093R0701_DCS500B/DCS600_Service manual_e_g
Chapter 10 - Service
VI A
10 - 5
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