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#49579 - 03/10/05 06:11 AM 3 Phase Generators
AJA Offline
Junior Member

Registered: 03/04/05
Posts: 2
Loc: Washburn, il
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.
Thanks
AJ

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#49580 - 03/11/05 05:38 AM Re: 3 Phase Generators
George Corron Offline
Member

Registered: 05/16/01
Posts: 728
Loc: Lorton, Va USA
AJ,
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?

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#49581 - 03/11/05 05:43 AM Re: 3 Phase Generators
IanR Offline
Member

Registered: 12/06/04
Posts: 326
Loc: Palm Bay FL USA
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.

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#49582 - 03/11/05 05:47 AM Re: 3 Phase Generators
IanR Offline
Member

Registered: 12/06/04
Posts: 326
Loc: Palm Bay FL USA
You din't say but have you verified that the exiter is operating correctly or at all?

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#49583 - 03/14/05 04:29 AM Re: 3 Phase Generators
AJA Offline
Junior Member

Registered: 03/04/05
Posts: 2
Loc: Washburn, il
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.
AJ

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