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« on: July 10, 2012, 06:21:12 PM »
pankaj
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A small leak can sink a great ship.




Hello RCIndians,
                       Here is the ebike we made (Not for any specific project just for fun   Thumbs Up ) Last month . Nothing is costly here except the ESC.

Parts Used:
1)Rewinded 270kV 1750 Watts BLDC Motor (There are so many Chinese vendors selling it ,Anyone will do.Rewinding is required to reduce the RPM further . Y-Delta thing  Thumbs Up )

2)Modified Castle creations ESC (HV 120): In the name of modification you have to add a heat Sink(Bigger is better),and LOW ESR capacitors in Parallel to battery (On the ESC).

3)2650mah 6S lipo 65C(C rating is very important here)

4)PWM Pulse generator (Servo Tester)

5)Any used Bicycle(Diameter of wheels should be less)

Total gear reduction is 5.5 (Gear) X 3.2 (Sprocket) =17.6 : EXACT
Maximum Current :122Amps EXACT (CC ESC'S data is logged automatically and can be viewed in Computer using their Software)
Top speed when battery is fully charged is 30-35kmph.: APPROX
Can carry 2 Persons(Payload=120Kg).  APPROX
Can go uphill upto 30 Degrees.  APPROX


*Approx is used where the parameter is not Technically measured.

Pics
http://thehobbyshop.in/images/DSC_0430.JPG
2hp Electric bike


http://thehobbyshop.in/images/DSC_0423.JPG
2hp Electric bike


http://thehobbyshop.in/images/DSC_0422.JPG
2hp Electric bike



*Had to mute the video (due to obvious reasons  Giggle ) so the Screaming motor is not audible(There is nothing sexier than a screaming motor).

The person riding is me  Grin


« Last Edit: July 10, 2012, 06:58:43 PM by pankaj » Logged

 

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« Reply #1 on: July 10, 2012, 06:55:25 PM »
dheerajjuneja
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Love it Pankaj, I have a bike lying around for years, can put it to good use i guess when i have some time Smiley

True inspiration.
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« Reply #2 on: July 10, 2012, 07:01:40 PM »
pankaj
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Thanks Dheeraj Sir.
Any questions/ Further explanations of any particular part /mechanism can be asked in this thread itself.

Pankaj
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« Reply #3 on: July 10, 2012, 07:03:39 PM »
dheerajjuneja
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Pankaj, if you can describe the process briefly, it would be great.

How much time you spent building this? This answer alone will decide that i will think about doing it or not ... Smiley
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« Reply #4 on: July 10, 2012, 07:09:15 PM »
pankaj
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Start to Finish time was 15 days .The winding of motor and mechanical part is what consumes the most of time.We are planning to make a Power bike (4~5 hp) in july end .Will try to post proper build log for that one.
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« Reply #5 on: July 10, 2012, 07:12:41 PM »
AEROVISHWA
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nice job...!!

how is the throttle control done....Huh?  Drool Drool
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« Reply #6 on: July 10, 2012, 07:17:27 PM »
pankaj
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Thanks.
how is the throttle control done....Huh?  Drool Drool
Using servo extension to the servo tester which is mounted on right handle. Bike Accelerator type arrange can be made using a push pull Clutch cable and mounting a pulley on the servo tester.Exponential throttle can also be made by using a variable diameter pullry on the Servo tester.
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« Reply #7 on: July 10, 2012, 08:14:00 PM »
abhay
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Wrong Brothers



I love the it too..

Whats the run time you get?
pankaj,why not attach the heat shink of ESC to the metallic rod of bike for further heat discipation..

Where have you placed the battery?
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« Reply #8 on: July 13, 2012, 09:08:02 AM »
pankaj
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run time is around 2-4 minutes.
Attaching heat sink to metal body seems a good idea will try it out in next build.Battery is strapped to the horizontal rod of cycle.

pankaj
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« Reply #9 on: July 13, 2012, 09:37:59 AM »
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Pankaj

you are Indie-Genius, good going there, share more details and pictures etc
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Gusty's Hangar and Introduction.

A Good pilot will practice until he gets it right,
A Great pilot will practice until he can’t get it wrong.
 

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« Reply #10 on: July 13, 2012, 10:29:08 AM »
girishsarwal
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DIYer



awesome awesome. great work. Did you weld the shaft to the gear using a gas torch?
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gs
 

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« Reply #11 on: July 13, 2012, 10:40:06 AM »
pankaj
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@ Gusty Sir Thanks ,I will try to write a complete build log and post it here. @Girish Sir Thanks.Small gear is mounted on motor using shear key(welding not possible due to possible damage to stator),Big gear is welded.( normal electric welding).
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« Reply #12 on: July 13, 2012, 03:22:58 PM »
vineet
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this is called an effort   Bow
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« Reply #13 on: July 13, 2012, 08:33:42 PM »
abhay
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Wrong Brothers



Pankaj, one more thing.. just keep safety in mind as well..
use lipo-safe bags during runs.. i am not sure whether there are chances of explosion of lipo during use, but you are very close to it during rides..

best wishes for your next experiment  Thumbs Up Thumbs Up
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« Reply #14 on: July 13, 2012, 08:39:20 PM »
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I wonder how I missed this thread. Head Scratching . Great bike, looks great. Smiley

Vineet
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« Reply #15 on: July 13, 2012, 10:15:41 PM »
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wonderful pankaj !!!  Hats Off

maybe using the dry 2 wheeler battery with self charging facility (like using dynomo or otehr alternative) may help more to run longer?

good going and best luck for the next model  Thumbs Up
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« Reply #16 on: July 13, 2012, 11:39:58 PM »
VC
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How did I miss this? This is so inspiring. Well done Buddy!!! Hats Off Clap Clap Clap

How about a close up video to show how the various parts work in conjunction?
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« Reply #17 on: July 14, 2012, 12:41:47 AM »
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awesomeness!! hard work payed off!!
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« Reply #18 on: July 14, 2012, 10:23:21 AM »
pankaj
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Thanks Vineet Sir.

Thanks Abhay bhai for the suggestion on safety precaution of the lipo .I dont think the battery has any chance to explode . BTW the battery pack is pretty close to Important body parts.  Grin

Thank you Anand Sir.
maybe using the dry 2 wheeler battery with self charging facility (like using dynomo or otehr alternative) may help more to run longer?

One can never charge a battery by dynamo in this case ,the power you get from dynamo will be Always lesser than what you will have to give additional to the prime mover (motor).In other alternatives the only option i see is solar power ,that too is not feasible as we will have to use 15 m^2(1m^2=100 W ) of panel for 1.5KW .

Thanks VC sir, I am so glad i could inspire the inspirer . New pics and videos will be added in 2 weeks. here is another pic where the sprocket reduction is visible (Sprockets are just interchanged,Big on wheel ,small on shaft).
http://thehobbyshop.in/images/DSC_0432.JPG
2hp Electric bike



Thanks Sujit sir.

Pankaj
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« Reply #19 on: July 14, 2012, 01:07:34 PM »
asinghatiya
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 Clap Clap...WONDERFUL ......!  Keep going!!!
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« Reply #20 on: July 15, 2012, 07:49:40 AM »
pankaj
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Thanks Arvind sir.
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