Pete1961
10 W
I have a 408 in a 20'' wheel lying around. Dates from about 07 but little used. It is in its basic set up with factory 9 wire feed cable.
Reading that he newer 408's can take many more amps & produce more torque I am wondering if the old and new models are similar inside. I see the motor phase wires are now 2.5mm CSA http://www.crystalyte.com/ Not sure what mine are - but less than this
I am thinking of running 25A @ nom 36v Li ion, see the motor feed cable as a potential limiting factor? Have considered running it sensorless (thus needing only the phase wires - hence then more room for each of these to pass through the axle hole. I always pedal before applying throttle, so the back emf pulses from the direct motor would be there to help it start? I have not used a sensorless controller before - I see some of them have max amps, LV cut off, etc. programmable via an LCD display - this would help in configuring it to my battery
I also have a 400 series clone (Goldenmotor HBM 36) - I married this to a 15A max self learn controller when the original failed. E-Crazyman told me this could take a 500W controller, but at the time I was on SLA so did not take him up on it.
My present home built Li Po4 pack is also limited to 15A max - but am looking at building a Vruzend batt as I have some cells for it & can get more locally. Have already a suitable charger hence the 36V Nom. Also have a 20'' bike with BMX type steel front fork now fitted.
I could equally experiment with the Golden HBM as both 20'' front wheels. The HBM used to peak out @ 16.5 MPH on the flat @ nom 36v,
Areas of doubt are a suitable & affordable controller, & the motor feed wires. Have read up much but still need advice on these points.
Am looking for more torque rather than more speed - sadly on a limited budget. Pete
Reading that he newer 408's can take many more amps & produce more torque I am wondering if the old and new models are similar inside. I see the motor phase wires are now 2.5mm CSA http://www.crystalyte.com/ Not sure what mine are - but less than this
I am thinking of running 25A @ nom 36v Li ion, see the motor feed cable as a potential limiting factor? Have considered running it sensorless (thus needing only the phase wires - hence then more room for each of these to pass through the axle hole. I always pedal before applying throttle, so the back emf pulses from the direct motor would be there to help it start? I have not used a sensorless controller before - I see some of them have max amps, LV cut off, etc. programmable via an LCD display - this would help in configuring it to my battery
I also have a 400 series clone (Goldenmotor HBM 36) - I married this to a 15A max self learn controller when the original failed. E-Crazyman told me this could take a 500W controller, but at the time I was on SLA so did not take him up on it.
My present home built Li Po4 pack is also limited to 15A max - but am looking at building a Vruzend batt as I have some cells for it & can get more locally. Have already a suitable charger hence the 36V Nom. Also have a 20'' bike with BMX type steel front fork now fitted.
I could equally experiment with the Golden HBM as both 20'' front wheels. The HBM used to peak out @ 16.5 MPH on the flat @ nom 36v,
Areas of doubt are a suitable & affordable controller, & the motor feed wires. Have read up much but still need advice on these points.
Am looking for more torque rather than more speed - sadly on a limited budget. Pete