Eh, the trained eye recognizes him 😀
Asynchronous motor (above) vs Synchronous (below)
- It is very rare that the constructor of an asynchronous gives a lot of characteristics;
- It is difficult that, in an asynchronous, the characteristics are quite flat at low speed, torque and current would not be however so much proportional
- The fact that there is talk of an external inductance: if there are no magnets, the external inductance does not make sense (at least, not for the weakening, if involved): in the asynchronous there is no a magnet to be contrasted, just lower the “fluxing”, so you only have a sort of L · i, to lower it;
- If you notice a “no load current” curve, which rises only in defluxing (it starts to rise a little after the “base” speed, that is the one at which we start to deflux), that current only serves to counteract the flow of the magnet. If there were not the magnet would not need to increase it, and probably in an asynchronous there would also be at low speed.