Search found 14 matches

by MexicanElmo
Feb 09 2018 1:56am
Forum: Items Wanted
Topic: Geared hub parts (stator and rotor, used/new/burnt)
Replies: 0
Views: 425

Geared hub parts (stator and rotor, used/new/burnt)

Hello Guys, I'm looking for a cheap alternative to a brand new 1000W bafang/BMC/MAC geared hub motor, and I only need the rotor + stator + axle, something like this: https://image.ibb.co/hszxg6/rotor.jpg Do any of you have any 750 or 1000W geared hub motor laying around? it doesn't matter if it does...
by MexicanElmo
Feb 02 2018 1:26am
Forum: E-Bike General Discussion
Topic: Geared Hub rotor standalone as a Mid drive
Replies: 4
Views: 640

Geared Hub rotor standalone as a Mid drive

Hello Forum, I want to build a mid drive style project but keeping it as simple, light and efficient as possible (who doesn't right?) So, what I want to try is to use the rotor and stator of a 500-1000 watts hub motor (MAC style), by removing it's freewheel planetary gears and side sideplates, just ...
by MexicanElmo
Sep 28 2017 6:50pm
Forum: Motor Technology
Topic: Optimal Hub Motor design? Break down of BionX D-Series
Replies: 91
Views: 15828

Re: Optimal Hub Motor design? Break down of BionX D-Series

Hello, did you get this one second hand on an ebay auction, having a faulty controller? If so, do you have the faulty controller right? is there any way you could diagnose that faulty controller, I mean is there any sign of a short, a burnt device or anything? Around the web I have come across some ...
by MexicanElmo
Sep 25 2017 9:55pm
Forum: Motor Technology
Topic: Optimal Hub Motor design? Break down of BionX D-Series
Replies: 91
Views: 15828

Re: Optimal Hub Motor design? Break down of BionX D-Series

This is a very cool motor.

Madin88, do you know how much of airgap there is between magnets and slots? is it noticeably bigger than on the average DD hub? for sure it was a challeng to design a composite frame to keep all that force bounded.
by MexicanElmo
Sep 14 2017 6:02pm
Forum: Large EV General Discussion
Topic: OK, a little gas every now and then, when no one is watching
Replies: 33
Views: 2980

Re: OK, a little gas every now and then, when no one is watc

Tesla should but a bunch of capabuses and bus stop/charging stations to take their employees to and from the city :lol:

https://youtu.be/LYL6NyU1g3k
by MexicanElmo
Sep 14 2017 5:28pm
Forum: E-Bike General Discussion
Topic: Seeking advice on e-bike selection
Replies: 41
Views: 3247

Re: Seeking advice on e-bike selection

Hi everyone, I was wondering what about electric scooters? You mentioned that you had no cycle parking space, you don't want to get sweaty at all, and don't want to spend much on it. https://www.amazon.com/SWAGTRON-Swagger-Electric-Ultra-Lightweight-Fold-n-Carry/dp/B01LDPT33A/ref=sr_1_8?ie=UTF8&qid=...
by MexicanElmo
Sep 03 2017 5:46pm
Forum: E-Bike Technical
Topic: Analysis of regen on an ebike
Replies: 126
Views: 43747

Re: Analysis of regen on an ebike

Hello! thanks, I wasn't aware of your simulator, it's really neat indeed. Actually I was doing some calculations on a spreadsheet but this saved me lots of time. Now let me tell you, that I wasn't trying to mimic a normal ebike, I was trying to boost my leg power, hence I used ebike parts as it was ...
by MexicanElmo
Aug 26 2017 12:49pm
Forum: E-Bike General Discussion
Topic: Ebike Build around Supercapacitors for Regen Purposes
Replies: 6
Views: 2465

Re: Ebike Build around Supercapacitors for Regen Purposes

Yes, those factors did neglect the advantages.

However I wasn't trying to build a traditional ebike, I was trying to boost the leg power on a bike, using most components ebike use, a power supply (a supercap module in this case), a DD motor and the electronics an ebike uses.
by MexicanElmo
Aug 25 2017 7:48pm
Forum: E-Bike General Discussion
Topic: Ebike Build around Supercapacitors for Regen Purposes
Replies: 6
Views: 2465

Re: Ebike Build around Supercapacitors for Regen Purposes

I think that proposal will be healthier for the battery, however the space and the weight to store an extra power supply + the electronics needed to switch between the SC bank and the battery may be too much. Cars have similar systems but as I said, cars are totally different beasts that weight abou...
by MexicanElmo
Aug 25 2017 12:28pm
Forum: E-Bike General Discussion
Topic: Ebike Build around Supercapacitors for Regen Purposes
Replies: 6
Views: 2465

Re: Ebike Build around Supercapacitors for Regen Purposes

Thank you, I can share more info with you on the topic. Can you explain me what do you want a supercap to your system?
by MexicanElmo
Aug 25 2017 7:03am
Forum: E-Bike Technical
Topic: Analysis of regen on an ebike
Replies: 126
Views: 43747

Re: Analysis of regen on an ebike

please take a look at my post on my supercap build
https://endless-sphere.com/forums/viewt ... =3&t=90197

I need to get my hands on a geared motor and start playing with it just like that guy who welded his to avoid the ratchet mechanism. :D
by MexicanElmo
Aug 25 2017 6:51am
Forum: E-Bike General Discussion
Topic: Ebike Build around Supercapacitors for Regen Purposes
Replies: 6
Views: 2465

Ebike Build around Supercapacitors for Regen Purposes

Hello Guys, I wanted to share with you my first ebike build. Basically what I was trying to do was to show Supercapacitors characteristics and their efficiency along Regen. My build is based on: -A 17 F 48 V Maxwell Technologies Supercap module (aproximately 5.44 Wh) -A kelly controller rated to 50 ...
by MexicanElmo
Aug 25 2017 1:44am
Forum: E-Bike Technical
Topic: How much regen power is possible?
Replies: 6
Views: 733

Re: How much regen power is possible?

A simple way of building a generator? out of a bike? a Stationary bike? a bike going downhill? if you are going to have a variable source of mechanical energy such as wind a BLDC direct drive motor (such as the ones on ebikes) is an expensive choice, a cheaper choice would be an induction motor, no ...
by MexicanElmo
Aug 24 2017 10:42pm
Forum: E-Bike Technical
Topic: Analysis of regen on an ebike
Replies: 126
Views: 43747

Re: Analysis of regen on an ebike

TimJ wrote: I came across this post and was really interested in the analysis. One thing I don't understand is that the maximum energy regenerated is only 50% of the energy available from the initial kinetic energy. I'm not an electrical engineer, so I didn't follow the argument for why it would be...