jimmyhackers
10 kW
- Joined
- May 11, 2015
- Messages
- 600
recently on youtube i noticed this comment on an eletric motorbike video.....didnt know what to make of it. (the quote is between the zeros)
0000000000000000000000000
It would be interesting to see how much horsepower that this 3 kilowatt electric bike puts out on a dyno rig.
For those who know nothing of how electric motors and vehicles are rated, the Wattage IS NOT the power output but the peak load power consumption. (I did my second apprenticeship as an electric traction motor technician when I was younger. I used to build, tune and dyno test the electric traction motors).
Performance wise, I would put this bike on a par with an average unrestricted 1970's 50cc sports motorcycle regarding performance. 70 to 80 KPH was flat out on the old Yamaha FS1E (OEM quoted top speed = 44 MPH).
The Wattage of the motor can be measured by putting the motor under heavy load (such as riding it up a steep hill laden with weights) and measuring the voltage and current it draws. (Volts x Amps = Watts).
The motors I used to test (for Lansing & Bagnal electric fork lift trucks) were rated at 22 HP @ 2,000 RPM with 48 Volts @ 54 Amps (2,592 Watts) consumption at peak load. If a 2.6 KW motor can produce 22 HP then I'd expect more from a 3 KW motor.
Something is very wrong here!!
00000000000000000000000000
soooooo.....can someone explain to me how a motor that takes in 2600wats of electrical power can output nearly 16kw of mechanical power?
is there some kind of sneaky maths wizardy going on with the dyno graphs....or something else?
0000000000000000000000000
It would be interesting to see how much horsepower that this 3 kilowatt electric bike puts out on a dyno rig.
For those who know nothing of how electric motors and vehicles are rated, the Wattage IS NOT the power output but the peak load power consumption. (I did my second apprenticeship as an electric traction motor technician when I was younger. I used to build, tune and dyno test the electric traction motors).
Performance wise, I would put this bike on a par with an average unrestricted 1970's 50cc sports motorcycle regarding performance. 70 to 80 KPH was flat out on the old Yamaha FS1E (OEM quoted top speed = 44 MPH).
The Wattage of the motor can be measured by putting the motor under heavy load (such as riding it up a steep hill laden with weights) and measuring the voltage and current it draws. (Volts x Amps = Watts).
The motors I used to test (for Lansing & Bagnal electric fork lift trucks) were rated at 22 HP @ 2,000 RPM with 48 Volts @ 54 Amps (2,592 Watts) consumption at peak load. If a 2.6 KW motor can produce 22 HP then I'd expect more from a 3 KW motor.
Something is very wrong here!!
00000000000000000000000000
soooooo.....can someone explain to me how a motor that takes in 2600wats of electrical power can output nearly 16kw of mechanical power?
is there some kind of sneaky maths wizardy going on with the dyno graphs....or something else?