This theme is open for a questions. All users are welcome into a progressive solution discussion.
I must do some electrical tests. With diameter of the wire, number of turns, bifilar coil connections, etc. https://en.wikipedia.org/wiki/Electric_generator
STATOR from coils:
I start with a 0.45 mm diameter wire, material is an enameled copper. You can get this wire from any old motors, only first measure the wire diameter.
Turns in one layer = 22 https://en.wikipedia.org/wiki/Electromagnetic_coil
Bifilar turns in one layer = 11 https://en.wikipedia.org/wiki/Bifilar_coil
Total turns per coil = 100
Wire length = 420 cm
Total turns per coil = 50
Wire length = 210 cm (add please 5 cm for both ends) = 220 cm
DC Resistance = 0.4 - 0.55 ohm
Inductance = 2 - 3 nH
Capacity = 5 - 7 uF
Core type of the coil = Air
Bifilar type(A1,A2 = = = B1,B2) = A2 connected to B1, Free ends A1 & B2(now testing for efficiency of harvesting energy ! )
ROTOR from magnets:
Material = NdFeB, Neodymium type, cylinder shape, diameter 10 mm, length = 10 mm
Grade = N35
Plating = Ni-Cu-Ni ( Nickel )
Color = Silver
Max Temp = 80 °C (degree of Celsius)
Magnetized direction = at both ends of the N - S pole
Number of magnets in one rotor = 10
Magnets are aligned around a cylinder = N - S - N - S etc. in one rotor. For a second rotor = S -N -S -N etc.
Gap between Rotor-Stator, on diameter = 2 mm, calculated with magnets face flatness.
PCB & Electronic components:
I use an Arduino controller for sensors and actuators(in this case a transistors) for motor & generator functions. So I need to make an PCB between a controller & motor/generator coils.
- Arduino nano
2.PCB Interface v.0.1
Tips & Tricks:
Making holes. Use a drill bit for example for magnets holes in a rotor. But not in a drill direction counterclockwise. The friction between a drill bit & material will generate a heat, & holes can be increased.
- Unstuck PLA printed object from a plate surface. PLA is acid resistant material so any chemicals are not a good choice, except alcohol. I use hot bed printing temp 44°C, this save me a little bit of energy, after 4 hours of printing. After printing I set a hot bed temp to 90-100°C & I use an 40% or more % alcohol for under object. Then with a little bit force bending I can remove object from the plate. But immediatly I put the object onto a flat cool surfaces, because is a deformed. After 2 minutes is object ready for a next operation.