treadmill permanent magnet DC motor as generator

[sensij]

Most domestic 4st mowers will be about 3.5hp @ 3600rpm. They will have almost no hp at 500rpm.

The lawn mower motor will run much faster than 500 RPM. The intention is for the treadmill motor, which is used to convert the lawn mower motor's output to electricity, to be geared down as needed to hit the target charge voltage.

I think the exercise is an interesting engineering project, but as a practical way to maintain an off-grid system... not so much. It is not hard to imagine that the inefficiency incurred by repurposing equipment in this way, used in unintended ways, without the normal protective circuits, will end up costing more than just buying a properly designed generator.

[Bala]

As was basically mentioned earlier. I doubt the unit is designed for anything more than occasional use. Life expectancy would be short if run hard for long periods

[almac]

thanks bala for giving me the reliable RPM for both engine types, i had no idea and could not find it on the net. so the 2 stroke i have will do. a pulley ratio of 6:1 will give me the 500RPM i need with good HP. will also make throttle adjustments for RPM 6x more accurate. should work well. this is intended for successive cloudy winter days so might only use it a couple of times a year. sensij a properly designed generator is about $500 then i will need a 24v DC power supply as well, another $300. this lawnmower and treadmill motor so far has cost $0

[Bala]

Your neighbours in the suburbs will love a victa engine running for hours at 3600rpm!!!!

[almac]

live on the main rd will fix a good muffler after getting everything else right, it will be a vertical mounted setup something like this.. so far i have tested both the victa engine and the treadmill motor both work, have removed both and will clean them up , mount them later. DSCN0953.JPG
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