hias9 said:
Why you say it should be 5T before even knowing which motor you want??
Regarding qs273 and escpecially qs205, I guess for a 5T the winding resistance and inductance will be too high to push 26kw through it at 72V. To push more power through it you need higher voltage or less turns.
QS273 is below $500, but only without shipping, duty and taxes.
So you just need the 26kw motor input power for short peaks and don't want to go higher than 72V? With a qs205 3T and a controller that puts out a lot of phase amps this should be possible. But of course it will overheat quickly at this power. Probably already after a few full power accelerations in a row.
So the reason that I am looking for a 5T qs 205 / qs273 is because it would have more tourque at lower speeds when compared to a 3.5T motor, right? I am just a newbie with this ebike stuff and I have never heard of a motor winding affecting the power of the bike, I thought it just affected what rpm had the most power, like a gear ratio.
For example, there is this guy on YouTube called ‘Josh Street Design’ that made a 72v 12kw bike and tried both the 5T and 3.5T qs motors and had great success with both. And says that 72v is capable of any motor winding.