I'm trying to invent viable hand-crank energy generator for charging phones and similar low-power appliances. I want to avoid gears altogether in the design, because they are hard to manufacture at home and because I don't want to lose any of the already small power generated by hand to friction between gears. With a single axis device, there is almost no friction or wear.
The concept looks like this:
This is what it would look tiled. The idea here is that you can tile it indefinitely, the only limit is your own strength (and patience when putting it together).
The magnets will be neodymium magnets. There's intentionally six of them but only five coils - this aims to reduce the "zero point" strength - the most stable point of attraction between coil cores and magnets.
The coils would have ferrite cores and each would have its own rectifier.
The magnets will be altered in polarity so that two opposing magnets will always be attracted to each other and therefore exert maximum possible field over the coil.
- Is this a good design for low RPM (40-100 RMP)?
- What would be the ideal number of turns if the target voltage is 5V, given the aforementioned RPM?
- Are ferrite cores good idea? Or should I use iron or air cored coils instead?