If I make a rotary converter with 3 phase out may I make it to work as a generator by power from a tractor if I have the correct speed?
If yes, do you have examples of how to solve it. For me 3 kVA would be enough, more will be just fine.
dsk
Not anywhere near worth the bother.
What you do instead is very simple.
Acquire a "generator head". It's what they are made for.
Those who sell them also sell regulators and such.
3 KVA range are not terribly expensive. See "Mecce Alta" for a popular one.
Mecc Alte | The Largest Independent Producer of Alternators
Even if not a practical source for Norway, there is a lot of useful information here to expand your understanding:
Generator Heads – Generator Parts | Central Georgia Generators
For a PTO, you will "probably" also need pulleys to change the RPM.
Gen heads for 60 Hz output are most commonly available @ 3600 RPM, @ 1800 RPM, and @ 900 RPM.
For 50 Hz, same hardware, lower input RPM, as expected!
Low KVA sizes, you might only find the two higher RPM 2 pole and 4 pole ones.
CAVEAT: While many, if not most, may be selective configured for all 120 single-phase, 120-0-120 // 240 split phase, and/or 208 Wye or 240 Delta 3-Phase, what serves for standby or emergency power to keep lights on and beer cold or operate woodworking tools doesn't do as well at powering metalworking machine-tools.
To run a shop, significant gen set oversizing is wise to insure it can manage starting loads and sustain stability in the cut as workloads vary.