Not advisable. With two alternator coils your battery will have an easier and longer life with a voltage regulator. Pretty much any RR will do, but if you decide to stick with the setup long term, I'd suggest a single phase RR as used on a bunch of Ducati models such as the MHR or Pantah (there are aftermarket versions available). The advantage of that unit is that it has an output for a dashboard charge light. There's a "GEN" light in the tacho (normally disconnected) that you can make use of.And to add to your confusion, the upgraded coils can be run without a regulator.
Translation: Could someone tell why the middle hookup is better?quelqu'un pourrait dire pourquoi le branchement du milieu est meilleur
Good explanation brilliantTranslation: Could someone tell why the middle hookup is better?
The wiring connection shown in the middle diagram is slightly better because the AC voltage output from the two alternator phase coils are not added together, so you have a lower peak voltage and current going into each phase of the rectifier. Lower voltage means lower current so slightly lower resistance losses and less heat generated in the rectifier diodes. Another way to think of it is that the AC current is spread across 6 diodes rather than 4. The difference is only marginal though.
However, it's only possible to use that wiring option if you have a 3 phase rectifier/regulator. If your RR is single phase (with only 2 AC input connections) then your only wiring option is the one shown in the first diagram.
Note that you can only connect the alternator coils in parallel because they produce voltage pulses at the same time. The coils are disposed at 180° on the stator plate and the alternator rotor has 4 magnets spaced at 90°. So each coil produces 4 synchronised voltage waveforms per revolution.
Désolé pour ne répondre pas en français. Mon français est de la merde. J'ai oublié la plupart de ce que j'ai étudié à l'école.