Elevator Exciter

Earth pole reversal has started? S.M.

Can someone tell me, is today the Bhadrapad Poornima?

No, just exam week coming up

That would explain the current glut of this type of question from new members.

We're just on the cusp. Assume this is a bell shaped curve and, wait till 9-12-2011.

I'm off for a week of R&R, by myself. I'll miss the peak of the activity.

_{I ran an elevator in my youth and it never got excited.}

Before you do anything you should investigate the cause of the polarity reversal. There's usually enough residual magnetism in the rotor to cause the field to build up in the right direction unless it has been idle for quite a long time, so I'd be curious what has changed in the generator circuitry. Once you're sure it's just a lack of sufficient magnetism then "Flash it" with a battery through a current limiting resistor.