Lebowski's bike build #1 one year and 6000 km later

Show off your Ebike creation here.
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Lebowski   1 GW

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Location: beautiful Zurich, Switzerland

Re: Lebowski's bike build #1 now with video

Post by Lebowski » Aug 05 2012 3:05pm

hjns wrote:ouch, that must have been some nice steep hill. Well, now at least you have time to finish the high voltage controller.... :mrgreen:
Been very busy with that one, very interesting :) been popping one specific gate driver but found the cause now, will fix this tomorrow.i already ran my big me 602 scooter motor with the controller. I will slowly up the amps and fix whatever issues I find, the aforementioned gate driver being the first thing to go... very very interesting project this high power controller :mrgreen:

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hjns   100 kW

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Re: Lebowski's bike build #1 now with video

Post by hjns » Aug 06 2012 12:52am

Well, don't you go too fast now, because yesterday evening my drBass rear dropouts broke away from the frame. I need to find another solution for attaching cromotor to the frame....

In the meantime, your controller could power up the cromotor, but without us sitting on the bike...
Henk


All men dream: but not equally. Those who dream by night in the dusty recesses of their minds wake in the day to find that it was vanity: but the dreamers of the day are dangerous men, for they may act their dreams with open eyes, to make it possible. T.E. Lawrence

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Lebowski   1 GW

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Re: Lebowski's bike build #1 now with video

Post by Lebowski » Aug 06 2012 1:06am

hjns wrote:Well, don't you go too fast now, because yesterday evening my drBass rear dropouts broke away from the frame. I need to find another solution for attaching cromotor to the frame....

In the meantime, your controller could power up the cromotor, but without us sitting on the bike...
The controller is already turning a ME602, a motor which makes the cromotor look like a little toy :mrgreen:
We'll try it when the controller and motor are both ready for it

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Lebowski   1 GW

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Re: Lebowski's bike build #1 one year and 6000 km later

Post by Lebowski » Oct 12 2013 11:42am

The beginning of this month I passed the one year commuting mark on my bike. I've used it rain or shine,
through sleet, snow and over ice, every work day to cycle 11.5 km to work and 11.5 km back (with 150 height
meters a day). By now I have around 6000 km on it. I can truly say that the bike has been amazing, except for 2 flat
tires I have had no breakdowns, the whole electronic system and motor have performed flawlessly. In the winter
it was even so bad the rear shifter didn't work anymore due to snow and ice having frozen on all the gearwheels
of the rear mech (except for the one I was cycling with), so I had to do the remaining 5km to work on motor
power alone. No problem !
The bike is set up for 1 kW, I use it as an assist so I pedal but (with my torque throttle) ask for motor power
such that it's a nice and easy cycle without sweating (which is especially nice in winter with a thick
coat on, I used to sweat but not with the motor, nice). Typical consumption per day is about 1.8 Ah
from 20s lipo, so about 145Wh for 23 km including 150m of climbing. Speedlimit is set to 26km/h.
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motor got pretty dirty but that doesn't seem to bother it, it still runs as good as the first day
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you can see there is some corrosion on the back-iron but the magnets look OK
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It throws quite some oil and grease around by the chain wizzing over the 12 tooth motor sprocket (at about 900 rpm,
so it puls 180 links a second). The chain needs to be replaced every 3000 km, but cost is only $ 6. Because of this
low price I've stopped oiling the motor chain as it's just not worth it.
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I thought the rearwheel sprocket attachement system :-) would be the weak point but it has held up fine
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Electronics... I updated the firmware in the chip a few times as I improved my controller IC, but no FETs were blown, nothing was replaced, nothing burned out in the 6000km
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sensorless.... no plugs everything soldered and covered with heatshrink
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motor was installed at 1000km
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even in the pouring rain the laptop bag impersonating as a battery compartement for 4 5s 5Ah zippy's worked OK
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when it rains or snows I put a plastic bag over the motor
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she's a dirty gal but ain't she a beauty ?
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hjns   100 kW

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Location: Basel, Switzerland

Re: Lebowski's bike build #1 one year and 6000 km later

Post by hjns » Oct 12 2013 11:47am

Very nice, Bas, I am immensely impressed. Wish I had your skills.
Henk


All men dream: but not equally. Those who dream by night in the dusty recesses of their minds wake in the day to find that it was vanity: but the dreamers of the day are dangerous men, for they may act their dreams with open eyes, to make it possible. T.E. Lawrence

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beast775   100 kW

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Re: Lebowski's bike build #1 one year and 6000 km later

Post by beast775 » Oct 12 2013 3:59pm

lebowski-Typical consumption per day is about 1.8 Ah from 20s lipo, so about 145Wh for 23 km-..... that is efficiency at its best :D .
2 FINGER SALUTE TO ESSO.no buying gasoline for 14 years now.
I spent all my money on bicycles women and beer the rest i just wasted.

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louis raaijmakers   100 W

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Re: Lebowski's bike build #1 one year and 6000 km later

Post by louis raaijmakers » Nov 29 2013 5:10pm

haha dit is dus die nederlander die in zwitserland woont.
zeer netjes gemaakt.
hoe oud ben je eigenlijk?
thanks

translation
haha this is the Dutchman who lives in Switzerland.
made very nicely.
how old are you?
thanks

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Lebowski   1 GW

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Location: beautiful Zurich, Switzerland

Re: Lebowski's bike build #1 one year and 6000 km later

Post by Lebowski » Nov 30 2013 3:11pm

louis raaijmakers wrote:haha dit is dus die nederlander die in zwitserland woont.
zeer netjes gemaakt.
hoe oud ben je eigenlijk?
thanks

translation
haha this is the Dutchman who lives in Switzerland.
made very nicely.
how old are you?
thanks
41

Translation :mrgreen:
41

Ragonamuffin   10 mW

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Location: Richmond Virginia

Re: Lebowski's bike build #1 one year and 6000 km later

Post by Ragonamuffin » Nov 10 2014 1:57am

I have been deeply inspired by your motor. Do you have any curves? Attempting a build, will post results!

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Lebowski   1 GW

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Re: Lebowski's bike build #1 one year and 6000 km later

Post by Lebowski » Nov 10 2014 7:52am

Ragonamuffin wrote:I have been deeply inspired by your motor. Do you have any curves? Attempting a build, will post results!
Curves ? Not really... just that the thing runs on 80V upto about 1000 rpm, takes 16A peak and has about 0.33Ohm resistance in each of the three phases.

Have you seen it's 3kW successor ?

http://endless-sphere.com/forums/viewto ... 60#p679460

Ragonamuffin   10 mW

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Location: Richmond Virginia

Re: Lebowski's bike build #1 one year and 6000 km later

Post by Ragonamuffin » Nov 11 2014 11:04am

Oh! I thought this was the successor! Yes indeed I have seen it. I will post my design when it is finished, I will need some help on kv ratings as it is not something I know how to change. I think you will love my design! A little teaser: it has modular stator and rotor stacks, and carbon fiber construction. You should definitely test the motor on a dynamo!

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