Mounting hall effect sensors on the DIY
OwnerAxel Borg
Owner's Other EV1989 Yamaha TZR-E
LocationOrebro, Orebro Sweden map
Vehicle1989 Yamaha TZR
Light motorcycle conversion.
Motor Brushless DC
DIY Axial flux 3-phase DC, 20kW peak.
Step-by-step building
instruction book available at WebPage
Drivetrain14-45 sprocket chain drive.
ControllerKelly KBL 48601
Easy to use and to program
once you got it installed.
Lacks low rpm power.

I have now changed from the Kelly to 7xHobby City 120A ESC (180A 30sec = 1260 A peak!)
Batteries11 Thunder Sky 90Ah, 3.20 Volt,
LiFePo4 3kWh battery pack.
System Voltage36 Volts
Charger Unknown Chinese
E-bay LiFePo charger, 42V 8A, seems to do the job alright. I have a couple of single cell LiFePo charges to balance cells if needed.
DC/DC Converter
Transelectric DC/DC converter
18-55V wide range input, 13.8V output.
InstrumentationCycle analyst, a truly great
little device!
Top Speed65 MPH (104 KPH)
AccelerationKelly: Moderate.
Good in the 40-80km/h range.

7x Hobbycity/Hobbywing 120A ESC:
Nice, 0-100km/h in 8-9sec, the batteries are now the limiting factor.
Videoclip 0-65mph 26kW(!) peak: WebPage
Range30 Miles (48 Kilometers)
40-50km 80% DOD.
Watt Hours/Mile90 Wh/Mile
With Kelly: 50-60Wh/km
When I ride the bike fairly gentle on a route with mixed speeds, 30-50-70 km/h, the cycle analysts calculate the energy consumption to 48Wh/km. Average speed on this specific run was 45km/h and max speed was 78km/h.
Riding the bike faster and more aggressive will result in a energy consumption in the 60Wh/km region. City driving stop-and-go, results in 51Wh/km with the Kelly, and 48Wh/km with the 7xESC setup in "Delta" and
45Wh/km with a motor winded "Star".
EV Miles
Current:446 Miles (717 Kilometers)
    As of 2/24/2012
Seating Capacity2 adults
Curb Weight310 Pounds (140 Kilograms)
140kg, 9kg over original stock weight.
Conversion Time1 Year, which includes testing and development of the electric motor.
2010-05, It is now registred and insured as a electric motorcycle.

With the 7x120A setup, you have to keep an eye on the motor temperature. Better acceleration is great fun but it does heat up the motor considerably.

Nothing new really, just enjoying my commute to work!
The hobby ESCs seams to hold up pretty well.

Another wonderful "electric" season has now come to an end.

code by jerry