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3 Phase Generators #49579 03/10/05 09:11 AM
Joined: Mar 2005
Posts: 2
AJA Offline OP
Junior Member
I have an engine drive 22kw induction 3 phase generator, commercially made, which will not generate any voltage. It has been flashed while turning at rated speed and above with 12 and 24 vdc without results. The generator has been removed for the engine and been flashed with the 12 vdc which has pulled the rotor to the field coils. After assembly the unit still does not produce voltage. All help is appreciated.

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Re: 3 Phase Generators #49580 03/11/05 08:38 AM
Joined: May 2001
Posts: 717
George Corron Offline
A little more info would help, there are several ways to make a field. If flashing your field does not produce a voltage, you likely have a bad set of diodes, or something broken/burned in the field. If you've got brushes - replace 'em THEN flash. Is there a fuse in the exciter you missed?

Re: 3 Phase Generators #49581 03/11/05 08:43 AM
Joined: Dec 2004
Posts: 329
IanR Offline
May seem like a stupid suggestion but, have you buzzed the windings? I know checking for continuity seems pretty basic but hey gotta look at all scenarios.

Re: 3 Phase Generators #49582 03/11/05 08:47 AM
Joined: Dec 2004
Posts: 329
IanR Offline
You din't say but have you verified that the exiter is operating correctly or at all?

Re: 3 Phase Generators #49583 03/14/05 07:29 AM
Joined: Mar 2005
Posts: 2
AJA Offline OP
Junior Member
The engine speed has be verified by two difference instruments. The windings provided the correct curve form on a scope. The rotor is laminated material and has no exciter circuit/no diodes. There were no capacitors with the unit.


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