Brushless Alternator Test


Thread Starter



Is there a way to "Statically" test a brushless alternator rotor exciter winding or the rectification diodes on the rotor without the removal of the rotor?

Any special instrument?

Have you consulted the brushless exciter manufacturer's instructions for testing and troubleshooting?

I would think proper testing shouldn't be much more than resistance tests, possibly a PI (Polarization Index, usually accomplished using a 500 V meggar), and certainly the diodes can be removed and tested with a voltmeter/diode tester.

If you're thinking of trying to simulate relative motion to induce an AC on the rotating armature of the brushless exciter, I would be hard-pressed to think of a way to do that. It might be that if you contacted the manufacturer they could provide a procedure or recommend a vendor/shop in your region who could test the equipment without removing the rotor--if they don't have procedures in their manuals.

Please write back to let us know how you fare!