Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

Builds, Repairs, Show Your Machines! => Technical Tips, Builds, and Help => Topic started by: SeeSteam on June 25, 2019, 08:12:36 am

Title: Re: Dynamo testing
Post by: Belugawhaleman on July 03, 2019, 12:59:24 pm

My PMR generator works pretty good. I don't know how many amps it produces but here's an old video
of mine running with a digital volt meter.
https://www.youtube.com/watch?v=JrWzrqlg-GI

Title: Dynamo testing
Post by: SeeSteam on June 25, 2019, 08:12:36 am

I've found dynamos for our engines to be rather finicky.


With my diy electrical testing rig, I have 3 DC motors (generators), a bulb and a Wilesco LED.

Using my Gilbert motor gearbox as a steam engine stand-in. From experience, the Gilbert engine isn't as powerful as a Wilesco D16.

The most reliable wattage output came to 0.22 watts from a toy motor. Interestingly, the Microcosm FD4 was all voltage and not much amps.

They are so sensitive to the right gearing... Or windings, field strength and rpm. I wonder how the PM Research dynamo would do?

Interestingly also that the load makes such a difference as well.