Reason for alternator not producing voltage on board ship

Reason for not producing voltage:

  • Loss of residual magnetism.
  • Failure of Diodes.
  • Malfunction of slip rings and brushes.
  • Faulty AVR.
  • Loss of Excitation.

Producing voltage but not producing full voltage:

  • Prime mover RPM is less.
  • Loss of residual magnetism.
  • Faulty AVR.
  • Air gap is too high between starter and rotor winding.
  • Short circuit in field coil.
  • Decrease in pole strength.


  1. Very good info, This information will always help everyone for gaining important knowledge. So please always share your valuable and essential information. I am very thankful to you for providing good information. Thanks once again for sharing it. pls visit our website test and tag Melbourne


Powered by Blogger.