Hi,
I have a motorbike weighing 200 Kg, running with IC engine,
Now I intend to convert it electric using BLDC,
I aim top speed of 80 kmph, and no problem with acceleration it can as low as possible, so that i can use low power BLDC motor and with decent battery I can run for longer distance before charging again
Fallow the link below
https://electronics.stackexchange.com/questions/213963/how-to-measure-the-maximum-weight-that-a-dc-motor-can-move@Saravanan Subramanian
Hello Saravanan,
Could you please develop on your current motorbike? What is the current ICE, in terms of rated power/speed/torque? What is the size of the wheel (to know the ouput speed)? Do you want your electric system direct drive (no gear)?
Best,
Guillaume
Guillaume Verez current ICE is 346 cc single cyclinder, 4 stroke petrol engine,
bore x stroke - 70 mm x 90 mm
maximum power - 19.8 bhp, 5250 rpm
maximum toruq - 28 nm, 4000 rpm,
rear tyre - 18 inch
I dont have problem in adding gear between electric motor and rear wheel, only concern is, it should consume less power (so i thought i should go with low power motor, i can have long miles covered in reasonable battery power), and top speed between 80-90 kmph.
Balasriram Kodi thanks for the reference balasriram, however i could not match it, let me explain.. My current ICE delivers max power of 19.8 bhp and for that it easily goes upto 100 kmph,
as per power formula in the link provided, power = velocity x force
power = 22.2 m/s (for 80kmph) x 2 kN (weight)
= 44.4 kW
i feel that is too high power for this bike
Bhupendra Desai Hi Sir, thank you for the output, is there any formula that can help me to calculate max speed achievable and acceleration value
Engine, developed constant torque, while with motor for short time, you could get 4 to 5 times higher torque( the crane, hoist, punching/stamping machines etc.) could refer short time and continious rateing formula, in any electrical machine design book.
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