The drive trainController, batteries and motorController and motor
Owner's Other EVElectric Scooter
LocationWickham, Western Australia Australia map
Web/EmailWebPage email image
Vehicle2009 Homemade
This bike uses the front end of an old bicycle and some scrap pieces of 50mm by 50mm by 3mm square tubing for the bike frame.
MotorUnite Motor MY1050 Permanent Magnet DC
24 VDC
500 Watt
2400 RPM
27 Amps
DrivetrainDC Motor and chain drive to the rear wheel using a 11 tooth drive sprocket and a 55 tooth driven sprocket.
Controller Homemade
Programmed "PICAXE" Microcontroller. The microcontroller PWM function pulses a 30VDC (max), 100 Amp (max) "packaged" Mosfet at 250 Hz. The Mosfet is available in Australia from Jaycar Electronics, part# SY-4086. Variable speed is achieved by way of a "Hall Effect" throttle.
Batteries2, 12.00 Volt, Lead-Acid, AGM
26Ah each.
System Voltage24 Volts
Charger Homemade
24 volt, 10amp charger using a surplus 250VA transformer, 35 amp bridge rectifier and electrolytic capacitor
HeaterNone: No need to have a heater when you live in the hot and humid tropics!!!
InstrumentationPossibly a 100amp to 50mV meter shunt to be installed and a 100 amp (50mV FSD) to be installed somewhere on the front of the E-Bike where the driver can clearly see it.
Top Speed25 MPH (40 KPH)
Not sure what the top speed is but I will be changing out the 88 tooth driven sprocket to a 55 tooth to gain more speed! ((It's now been changed and has made a noticeable change in speed! And still has good torque! Top speed = 25MPH???. But still needs to be properly checked.
AccelerationPretty good.
RangeUnknown - I recently took the E-Bike out for a 5 kilometer ride. The controller was just noticeably warm and the motor was somewhat hot, but not to hot. The controller and heat sink appear to be totally overkill, but that's the parts that were in my junk box, so that's what I used.
Watt Hours/Mileunknown
EV Miles
Current:25 Miles (40 Kilometers)
Seating Capacity1 (and only one, ME!)
Curb Weight50 Pounds (22 Kilograms)
TiresFront: 26 X 1.95 @ 60 PIS
Rear: 12.5 X 2.5 @ 40 PSI
Conversion TimeAbout 1 year. But lost enthusiasm many time during construction. Especially during the hot humid months!
Conversion Cost$350- 400

code by jerry