This Video just shows how to find your motor rated no load Kv. Doing this on the road will show the loaded Kv. This is helpful in determining requirements for battery Voltage and amps based on how fast you want to go.
This motor is 22.6Kv, for a 14” tire. That gives the same speed as a 11.3Kv motor and 28” tire.
I can’t demonstrate field weakening on the road with this 60v battery because the bike is already too fast for a 14” folding ebike
0:00 Finding Motor Kv
0:16 set pole pairs correctly so you get the correct RPM value from the Dashboard
0:30 ensure WeakResponse is set to 7:none, which turns off field weakening.
0:35 Next increase MaxSpeed to about 2x what you think the rated speed is so it doesn’t interfere
0:48 set all Ratios in Speed to 100% so it doesn’t interfere and increase speed limit to 2x max speed
1:20 with the motor free to spin, slowly increase throttle to 100%
1:28 my motor did 1430 rpm at 63.4v, so 1430/63.4= 22.6Kv.
1:47 now we change WeakResponse from 7 (off) to 6 (first level field weakening)
2:09 you can see rpm went to about 1785 this time. Under load this would be slower, but faster than with field weakening off under load
3:31 I turn field weakening off because my ebike goes faster than I want without it after upgrading from 13s (48v) to 16s (60v) battery.
5:20 LimitSpeed doesn’t seem to do anything. Lol
5:38 Now I set my Ratios In Speed to start governing at 1200RPM@50% phase current. 1300RPM @25%
5:47 then 1400RPM@1%. It will not let the motor run faster than 1400 rpm, even if i set field weakening to maximum
6:05 the taper should be over a few settings, then 0% down to the bottom. This gives stable overspeed protection
6:37 you can see under no load, max rpm is just under 1400. On the road it would be closer to 1300RPM max or 1200RPM if going uphill
7:00 finally I set MaxSpeed to 675 which corresponds to 45 kph. Boost will override this and I can go to about 80 kph if I’m stupid
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