What type of electrical motors are on the movie?
On the Youtube video they use commercial off-the-shelf consumer fans.
There is a control system - which is basically 4x OptoCoupler + Triac + (resistors and capacitors).
Those two motors on the movie are so nicely speed adjustable.
What they are, out of:
- single phase ac motors
- Split-phase motor
- Split-phase start capacitor motor
- Split-phase run capacitor motor
- Shaded-Pole motor
- Universal motor
for sure this is NOT no.5. (because they are specifically loud)
It seems that this is NOT no.2 neither. In the publication, author try to achieve the same, but withouth successful results (p.23-27), on page page.14 he states that this is 'Single Phase Induction Motor / Capacitor Start Type Motor / 370 W' https://es.slideshare.net/VISHNUG39/automated-speed-drive-using-raspberry-pi
Which of those motors form the list (no.1-no.5), ventilators on the youtube movies are then?