dumbass
100 kW
I think you are really over reaching for a 600w motor. Ether I am missingit or you didn't indicate if your driving the right or left side of the wheel. Which is it?
Bob
Bob
E BIKE MY1020GDA 60V 1000W YK43B 24-60 V Controller
- Thread starter darkangel
- Start date
Like I tried to explain to you in your original thread,
http://www.endless-sphere.com/forums/viewtopic.php?t=39170
you're gonna have to use a much bigger sprocket at the wheel, and/or a smaller one on the motor. I don't know how else to help you, if you are going to persist in trying to go the wrong direction.
http://www.endless-sphere.com/forums/viewtopic.php?t=39170
you're gonna have to use a much bigger sprocket at the wheel, and/or a smaller one on the motor. I don't know how else to help you, if you are going to persist in trying to go the wrong direction.
amberwolf said:Like I tried to explain to you in your original thread,
http://www.endless-sphere.com/forums/viewtopic.php?t=39170
you're gonna have to use a much bigger sprocket at the wheel, and/or a smaller one on the motor. I don't know how else to help you, if you are going to persist in trying to go the wrong direction.
this time i was trying to see if i can get to 35mph, and by just adding bigger gear on the rear wheel it would kill the motor max is 22t 25mph. and speed i am looking to be at is posted
the main point is, i was looking if anyone has sucesfuly reached this speed and didnt kill the motor, how they went about it and so on
but i guess i was not clear
sorry about it and thank you amber,
dumbass
100 kW
darkangel said:
darkangel said:
Got it (now). For some reason pics don't always show up on my pc. Crazy.....but then again so am I.
TylerDurden
100 GW
600W motor might not survive.
That's one problem right there: 900RPM loaded is far too low if the 3000RPM is unloaded under the same conditions. Usually loaded RPM is about 80% of unloaded RPM, depending on the system. The further you get away from the unloaded RPM, the higher your currents will be, because the back-EMF (BEMF) of the motor will be so much lower, and the motor will burn up if it is kept at that loading unless you are cooling it enough to take away all the waste heat being produced. (this would take some major cooling).darkangel said:
I dunno about any of the rest of the math below; it doesn't sound right and is too confusing for me to follow. You are also completely leaving out how much power it takes to overcome wind resistance at those speeds, and how much power is going to be used and how much wasted as heat, etc. Without knowing those things, you won't know what motor, battery, or controller you can use so they won't just burn up.
after further setup
controller 36v
11t - 44t sprocket
the motor came to life i was riding it today for 5++ hours motor was wormish and outside was like 90 with wind, hell its fn chicago always windy here
speed is like 10 mph, f.... it works at least, the chain is also loose and loud i have to fix it
so now i am to lazy to test it with 48t but thats next
after that will use 48 v controller and see what happens
i aaaaaammm haaaapppppy yes
controller 36v
11t - 44t sprocket
the motor came to life i was riding it today for 5++ hours motor was wormish and outside was like 90 with wind, hell its fn chicago always windy here
speed is like 10 mph, f.... it works at least, the chain is also loose and loud i have to fix it
so now i am to lazy to test it with 48t but thats next
after that will use 48 v controller and see what happens
i aaaaaammm haaaapppppy yes
3000rpm / 60v = 50 rpm per V
50rpm per V × 36v controller = 1800rpm
250w heat loss wiring conections loss
1800rpm ÷ 2 = 900 rpm * 60 * 48 ÷ 11 * 33 wheel * 3.14 ÷ 12 * 52860ft= 38.45mph
curently
1800rpm ÷ 2 = 900 rpm * 60 * 44 ÷ 11 * 33 wheel * 3.14 ÷ 12 * 52860ft= or wait maybe i should simplify
900rpm * 60 = 54,000
44 / 11 = 4
33 - 3.14 = 103.62
12 * 52860 = 634, 320
54,000 * 4 = 216,000
103.62 / 634, 320 = 0.0001633
216,000 * 0.0001633 = 35.27MPH without resistance and battery drain
after further testin on full 36 v battery pack the controller is feeding only 30v with full throttle
so calculation will change to
50rpm * 30v = 1500 w ÷ 2 = 750w × 60 = 45000
45000 × 4 = 180,000 × 0.0001633 = 29.39mph
watts ÷ current = volts lets test
250w ÷ 30amp = 8.5 v
30v - 8.5v = 21.5v × 50rpm = 1075 w ÷ 2 = 537.5 w × 60 =32250
32250 × 4 = 129,000 × 0.0001633 = 21mph not including terain
50rpm per V × 36v controller = 1800rpm
250w heat loss wiring conections loss
1800rpm ÷ 2 = 900 rpm * 60 * 48 ÷ 11 * 33 wheel * 3.14 ÷ 12 * 52860ft= 38.45mph
curently
1800rpm ÷ 2 = 900 rpm * 60 * 44 ÷ 11 * 33 wheel * 3.14 ÷ 12 * 52860ft= or wait maybe i should simplify
900rpm * 60 = 54,000
44 / 11 = 4
33 - 3.14 = 103.62
12 * 52860 = 634, 320
54,000 * 4 = 216,000
103.62 / 634, 320 = 0.0001633
216,000 * 0.0001633 = 35.27MPH without resistance and battery drain
after further testin on full 36 v battery pack the controller is feeding only 30v with full throttle
so calculation will change to
50rpm * 30v = 1500 w ÷ 2 = 750w × 60 = 45000
45000 × 4 = 180,000 × 0.0001633 = 29.39mph
watts ÷ current = volts lets test
250w ÷ 30amp = 8.5 v
30v - 8.5v = 21.5v × 50rpm = 1075 w ÷ 2 = 537.5 w × 60 =32250
32250 × 4 = 129,000 × 0.0001633 = 21mph not including terain