Hello,
To reduce the need for reduction, I tend to look for low kv motors (as a way to get more torque, less speed)
So far, my perception (possibly a collection of misconceptions) is that this can be achieved by two kind of design tweaks:
- playing with copper winding (balancing same mass of copper as many turns vs less turns bigger wires). Overall the power output is the same but yielding either more speed or more torque. There are some discussions on this forum on this trade off.
- playing with the number of poles: again, same power envelop but using a cycle to have more or less angular displacement. Again, some discussions (which I didn’t all read in details yet)
Now, I’m curious about another cursor to play with.
My insight is that winding a motor with a higher number of phases (like 5, 7... Is an even count >2 a working option?) would result in more torque and less speed for the same power output.
I tried my luck with google but it seems the topic is rather confidential (mainly one 2014 slide deck but quite high level). I’m interested in any thoughts, discussion or pointers to relevant knowledge.
Obviously, multiplying the phase would result in more commutation complexity. This complexity itself is not really my focus here except if in term of practical design it induce negative effects on overall efficiency.
Cheers,
Stéphane
To reduce the need for reduction, I tend to look for low kv motors (as a way to get more torque, less speed)
So far, my perception (possibly a collection of misconceptions) is that this can be achieved by two kind of design tweaks:
- playing with copper winding (balancing same mass of copper as many turns vs less turns bigger wires). Overall the power output is the same but yielding either more speed or more torque. There are some discussions on this forum on this trade off.
- playing with the number of poles: again, same power envelop but using a cycle to have more or less angular displacement. Again, some discussions (which I didn’t all read in details yet)
Now, I’m curious about another cursor to play with.
My insight is that winding a motor with a higher number of phases (like 5, 7... Is an even count >2 a working option?) would result in more torque and less speed for the same power output.
I tried my luck with google but it seems the topic is rather confidential (mainly one 2014 slide deck but quite high level). I’m interested in any thoughts, discussion or pointers to relevant knowledge.
Obviously, multiplying the phase would result in more commutation complexity. This complexity itself is not really my focus here except if in term of practical design it induce negative effects on overall efficiency.
Cheers,
Stéphane