Search found 180 matches

by sigimem
Oct 18 2016 7:39am
Forum: Battery Technology
Topic: Zero battery pack in DIY motorcycle?
Replies: 0
Views: 307

Zero battery pack in DIY motorcycle?

While searching cells for my offroad project I found it difficult to get cells with a high power density W/kg and mid energy density that can still last more than 5oo cycles and are avialable for customers. Thats why I started this threat https://endless-sphere.com/forums/viewtopic.php?f=14&t=84036 ...
by sigimem
Oct 18 2016 6:05am
Forum: E-Scooter and Motorcycle General Discussion
Topic: 2007 Yamaha YJ125 Vino conversion
Replies: 14
Views: 2132

Re: 2007 Yamaha YJ125 Vino conversion

First great father and son project. I don't know the reglementations in canada so maybe it's not possible. It seems like there wil be a lot of weight in the back of your scooter directly attached to the frame maybe you should consider to reinforce the frame a bit. There might be twisting at high spe...
by sigimem
Oct 13 2016 2:36am
Forum: Battery Technology
Topic: New 26Ah NMC Cell from a123
Replies: 22
Views: 2853

Re: New 26Ah NMC Cell from a123

Does anyone know if these new A123 NMC cells have the same or similar packaging requirements (uniform pressure across the cell), as their LiFePO4 pouch cells? in the pdf it says: Packaging is convenient in our existing module hardware and easily scalable for multiple applications. I guess thats a h...
by sigimem
Oct 10 2016 2:40pm
Forum: Battery Technology
Topic: New 26Ah NMC Cell from a123
Replies: 22
Views: 2853

Re: New 26Ah NMC Cell from a123

The A123 NMC pouch has fairly good power density, but pretty low energy density for applications that are weight sensitive. I found that it might be spot on for my battery pack: - I would need about 100V or slightly under 120V wenn HOC - around 2kwh+ - 250A continous - 400A pulse - 15kg max without...
by sigimem
Oct 10 2016 1:27am
Forum: Battery Technology
Topic: New 26Ah NMC Cell from a123
Replies: 22
Views: 2853

New 26Ah NMC Cell from a123

Have you seen this? Does anyone know more about it? seems interesting for a build where high current and good energy density is required
Screenshot 2016-10-10 08.17.24.png
Screenshot 2016-10-10 08.17.24.png (206.72 KiB) Viewed 895 times
by sigimem
May 18 2016 7:06pm
Forum: Battery Technology
Topic: Westart 20AH pouch cell
Replies: 62
Views: 6581

Re: Westart 20AH pouch cell

On Facebook the guy stated 27 $ per Cell. He was asked for 100 Cells so maybe It´s more in smaller quantities.
Thats the main argument for these cells I guess
by sigimem
May 13 2016 6:40am
Forum: Battery Technology
Topic: Westart 20AH pouch cell
Replies: 62
Views: 6581

Westart 20AH pouch cell

Hope you don't pick on me but some guy posted on facebook :roll: battery data and it looked very interesting.
Is something like this available right now? Or are these just impressive numbers that are not real?
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13177582_1794119154151525_7720743103526499704_n.jpg (87.43 KiB) Viewed 4362 times
by sigimem
Dec 08 2015 4:38pm
Forum: E-Bike Technical
Topic: velomobile suspension, advice needed. Build thread
Replies: 47
Views: 5660

Re: velomobile suspension, advice needed. Build thread

My go on a velomobile would be wide DH front hubs(20mm axle) a 1.4 inch wide 19" aluminium motorcycle rim and 24" Schwalbe Crazy Bob tyres but thats just my 0.02 EUR Your right you will see maybe your type of riding driving 8) fits this rim and tyre combo Maybe you can design the part that holds you...
by sigimem
Dec 07 2015 7:39am
Forum: E-Bike Technical
Topic: velomobile suspension, advice needed. Build thread
Replies: 47
Views: 5660

Re: velomobile suspension, advice needed. Build thread

Hey agnuism great idea I really like the look of your CAD velomobile. I am stepping in a bit too late I know can't help it. My advice don´t use 28" wheels (with regular wide hubs) on a velomobile. Without the ability to lean the front wheels will have a very hard time. The driving will probably be m...
by sigimem
Nov 30 2015 6:05pm
Forum: Motor Technology
Topic: 500KG 4WD agricultural vehicle
Replies: 13
Views: 1023

Re: 500KG 4WD agricultural vehicle

I thought about a vehicle maybe similiar to the specs you told. For moving small trailers installing a winch etc. I don't know your plan but I would go with big electric motors for every wheel mounted to che chassis not using them as hub motors but with reduction. Even if you use Hub motors like sug...
by sigimem
Nov 03 2015 4:50pm
Forum: Motor Technology
Topic: Oil-cooled geared motor (German website)
Replies: 4
Views: 781

Re: Oil-cooled geared motor (German website)

Might be the Zelena Vozilla Motor?
by sigimem
Jul 15 2015 10:45am
Forum: E-Scooter and Motorcycle General Discussion
Topic: Electricmoto blade build/upgrade
Replies: 102
Views: 15024

Re: Electricmoto blade build/upgrade

a 19" motorcycle tyre should fit a 24" bike rim I use a Heidenau K46 tyre on my Hub motor Bike (19" rim) still kinda looks like a bycicle tyre but has more rubber. http://www.reifentiefpreis.de/Motorrad-Enduro/19-Zoll-Reifen/2.50-19/HEIDENAU-K-46-41M-31112-Enduro.html?gclid=CjwKEAjwiZitBRCy0pb3rIbG9...
by sigimem
Jul 02 2015 3:27am
Forum: E-Bike Non-hub Motor Drives
Topic: custom frame ideas
Replies: 11
Views: 1561

Re: custom frame ideas

Hey christerjung,

any updates on this? I like the project and ideas...
by sigimem
Jun 17 2015 1:28am
Forum: Motor Technology
Topic: Motorbike Motor
Replies: 60
Views: 8426

Re: Motorbike Motor

I asked enstroj which motor controller to use with their 207 motor. They highly recommend emsiso.com controller weighs about 1,5 kg and is not that expensive. It's called e drive 400.

Nice project like to see it completed and in a frame. What will you use for a frame ?
by sigimem
Jun 10 2015 8:40am
Forum: E-Scooter and Motorcycle General Discussion
Topic: Electricmoto blade build/upgrade
Replies: 102
Views: 15024

Re: Electricmoto blade build/upgrade

What is your top speed?
How is the acceleration?

really nice build you brother will like it I would guess,
by sigimem
May 03 2015 3:54am
Forum: E-Bike Non-hub Motor Drives
Topic: LMX P2 : Freeride trials motorcycle frame development
Replies: 990
Views: 169969

Re: LMX P2 : Freeride trials motorcycle frame development

+1 on the build thread

1. Question is it a revolt motor?
by sigimem
Apr 16 2015 12:30pm
Forum: E-Bike Technical
Topic: irfb4110 controllers
Replies: 1
Views: 256

Re: irfb4110 controllers

WTF 83% Efficiency? If thats true you would have 0,83*0,85= 0.705 70.5% system Efficiency assuming a 85% efficient motor. Would be bad
by sigimem
Apr 14 2015 2:29pm
Forum: E-Bike Technical
Topic: What are the difference between front/rear m/c rims?
Replies: 13
Views: 791

Re: What are the difference between front/rear m/c rims?

Hard to tell depends on the hub(motor) you want to use. I would guess it´s better to use another rim.
by sigimem
Apr 13 2015 10:12am
Forum: Motor Technology
Topic: Sevcon Gen4 Size 6 teardown pics
Replies: 22
Views: 5305

Re: Sevcon Gen4 Size 6 teardown pics

Well any more info about "My Controller" might be interesting.
by sigimem
Apr 13 2015 9:57am
Forum: E-Bike General Discussion
Topic: Tires
Replies: 16
Views: 1736

Re: Tires

Ok my fault. Anyway with this bike and the speeds your going at your fine with any decent bike tyre.
by sigimem
Apr 12 2015 3:39pm
Forum: E-Bike General Discussion
Topic: Tires
Replies: 16
Views: 1736

Re: Tires

I liked the Schwalbe Crazy Bob tyres they are available in 20*1.85 and 20*2.1. Road legal for Mopeds in the EU (45 km/H) and Ebike 50 ready.

If you want to go with the EBIKE READY 25 your still fine

pics of bike and wheels would help
by sigimem
Apr 10 2015 7:34am
Forum: E-Bike Non-hub Motor Drives
Topic: build blog->fully aluminium trail/freeride BHT Frame
Replies: 84
Views: 11811

Re: build blog->fully aluminium trail/freeride BHT Frame

Läuft bei dir was :D

very cool that you designed and build a plama cutter.

What is your goal in total weight of the new frame?
by sigimem
Mar 29 2015 11:36am
Forum: E-Bike Technical
Topic: Frame design program - carbon fibre
Replies: 1
Views: 302

Re: Frame design program - carbon fibre

There are two types of software: 1 .CAD programs made for modelling and drawing of parts. 2. Finite Element Method programs for calculating mechanical stress elongation and more. Also Solidworks has a FEM tool for it might be not the right choice for carbon fiber for example.So basicly most companie...
by sigimem
Mar 20 2015 9:10pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Electricmoto blade build/upgrade
Replies: 102
Views: 15024

Re: Electricmoto blade build/upgrade

Very nice build. Aluminium panels look good and wiring is very clean. what contactor did you use for the main power?

The sprockets seem wrong to me they look like ones that were worn out :(