Reasons and solutions for diesel generators

When using a diesel generator set, when the generator set starts to the rated speed, sometimes the generator charging current is too small, what is going on? Is there any solution?

Such a failure is generally due to the poor silicon diode lead debride disconnect or poor brush and slip ring contact, the specific reasons are as follows:
1, belt slip
2, the regulator voltage is low
3, diesel generator magnetic field line rail or magnetic field coil local iron short circuit, etc.
4, diesel generator silicon diode lead deprotection, so that the armature coil is in phase or two-phase
5, brush and slip ring contact adverse contact (there is dirt on the slip ring, the carbon brush is too large, the spring pressure is lacking, etc.), the contact resistance is large, so that the exciting current is smaller.

The following solutions should be taken to this phenomenon:
1. Check the diesel generator electrical brush contact with slip ring, no abnormalities
2, use the multimeter DC voltage gear measurement regulator output voltage, found that the output voltage is very low
3. Measure the output voltage of the generator with the multimeter DC voltage gear. It is found that the output voltage is 5V (when the measurement is disconnected, the wiring of the battery is disconnected), which proof the fault in the charging generator
4, when measuring the diode, four diodes were broken. Replace the diode, assemble the diesel generator, and then start the diesel generator to 1300R / min, the charging current table on the dashboard is shown as 15A, indicating that the diesel generator charges normally.

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