Tag: generator

selfmade Wooden Generator 1 – Experiment 2 with rectifier

Wooden Generator 1 with rectifier

Based on Wooden Generator Experiment 1, the circuit was now extended by a bridge rectifier.

For this I used BAT48 Schottky diodes because they consume only 0.2 volts.
A 1000 μF electrolytic capacitor is used as a stabilizing element.
The capacitor buffers the whole a little and the LED should light up longer and more stable.
With a small LED as a consumer, I get a current of approx. 5 mA and a voltage of approx. 1.7 V with fast speeds.
The result is a proud performance of 8.5 milliwatts.
So there is still much room for improvement :-)

The following video gives a brief impression of the rather poor yield.

https://youtube.com/watch?v=SH9jxq0oGrw%26hl%3Den%26fs%3D1

Homemade electricity generator for low speeds

Why build a generator yourself when everything can be bought somewhere?

The only thing I learn from buying is spending money
I was unable to find a generator that could generate significant voltage and current at low revolutions of approx. 100 * min-1
The generator should be used in a Stirling engine and possibly in a vertically running wind turbine, which does not bring the highest speeds
The generator must also be usable as a motor in order to start a Stirling engine
The generator has to run very lightly in order to keep losses low, i.e. no sliding contacts and no jerking, as with a bicycle dynamo
For use in the Stirling engine, the generator should also represent the flywheel mass, which means that it must have a certain torque
The test generator has to withstand my sons’ attempts to play :-)
The construction must be simple and it must be possible to assemble it without complex special tools

In the following I log a little what I tried to get as close as possible to the goal, which at first glance seems unrealistic. (Neukirchen in April 2009)

experiment	Power in watts	rotation speed
Wooden Generator 1 exp. 2	0,0085	fast
Wooden Generator 1 exp. 3	0,231	fast
Kreissägeblatt Generator Exp. 1	1,6	rpm