Help! Tilting trike - getting it going again (newbie questions)

vfr400

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Jun 12, 2011
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There's very limited choice now unless you can find something on Aliexpress. previously, I'd have advised the Q128H from Bmsbattery or the 500w BPM, but all I can find from the regular suppliers is the 350w BPM. 201 rpm version will give more torque, but will max out at around 12 mph. 328 rpm version will max out at about 19 mph.

S12S controller and LCD3. You should get a speed sensor too in case the motor doesn't have one. You have to turn down the current in the settings. Default is 30 amps. Set parameter C5 to 05 or 06 to get 22 or 24 amps. It's a fairly large controller.
 

vfr400

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Jun 12, 2011
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Thanks - but what is a speed sensor?
It's a magnet that goes on the wheel and a sensor that goes on the fork to detect how fast the wheel is turning. It's like those cycle computer things if you've ever had one. Without one, the LCD won't display the speed properly.
 

Nealh

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Aug 7, 2014
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If about 12mph is good for the user then the AKM100 is available in 201rpm.

With rim.

With out.

 

Nealh

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Aug 7, 2014
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201 rpm is the copper winding speed so in 20" wheel it equates to approx. 12mph, the lower the winding speed the more efficient the hub is at climbing.
A 250 rpm hub would be about 15mph.
A 328rpm as VFR says is about 19 mph,
Though these aren't hill climbing speeds but flat terrain obtainable assist speeds.

For 20" wheel 1mph = approx. 16.8 rpm.
 

Nealh

Esteemed Pedelecer
Aug 7, 2014
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The same hub 201rpm in a larger wheel has a greater rotation speed so can obtain more speed.
In a 26 wheel approx. 1mph = 12.9 rpm.
700c/28" wheel approx. 1mph = 12.2rpm.