Search found 100 matches

by avandalen
Oct 06 2020 7:32am
Forum: Motor Technology
Topic: 2-wire control bus for ebikes
Replies: 1
Views: 412

2-wire control bus for ebikes

E-bike cable killer 2-wire control bus See the whole article at my website: https://www.avdweb.nl/solar-bike/electronics/cable-killer For my solar-powered bicycle, the Maxun One, I have developed the ebike cable killer. This is a 2-wire control bus for e-bikes. Since just 3 wires are needed for the...
by avandalen
Aug 25 2020 2:41am
Forum: Battery Technology
Topic: Custom Bosch / Yamaha battery
Replies: 37
Views: 13471

Re: Custom Bosch / Yamaha battery

I built a battery dongle / hack for Yamaha and also developed the complete software, see my article here: https://www.avdweb.nl/solar-bike/batteries/battery-hack and the Pedelec forum here: https://www.pedelecforum.de/forum/index.php?threads/yamaha-batterie-hack-mit-fuel-gauge-ltc2944.80440/ ***PLEA...
by avandalen
Apr 24 2020 3:20am
Forum: Motor Technology
Topic: Improve Yamaha motor efficiency by better windings
Replies: 1
Views: 287

Improve Yamaha motor efficiency by better windings

The 250W Yamaha PW-SE and PW-X2 motors are not optimally wound, there is room left. Winding to 100% will give a better efficiency. See my website here: https://www.avdweb.nl/solar-bike/hub-motor/yamaha-pw-se https://www.avdweb.nl/solar-bike/hub-motor/yamaha-pw-sx2 See more about motor-tuning here: h...
by avandalen
Feb 18 2020 4:41am
Forum: Motor Technology
Topic: Mid-drive motors of 250W compared from a mechanical viewpoint
Replies: 1
Views: 652

Mid-drive motors of 250W compared from a mechanical viewpoint

I have a new article where I compare all mid-drive motors of 250W compared from a mechanical viewpoint. https://www.avdweb.nl/solar-bike/hub-motor/motors-compared https://www.avdweb.nl/Article_files/Solarbike/Images-hub-motors/Motors-compared/Mid-drive-motors-compared-Excel.jpg All mid-drive motors ...
by avandalen
May 28 2019 3:32am
Forum: Motor Technology
Topic: Yamaha PW-SE mid-drive motor tear down
Replies: 1
Views: 1440

Yamaha PW-SE mid-drive motor tear down

I have dismantled a Yamaha PW-SE mid-drive motor and looked what's inside. See here for my article about the Yamaha PW-SE: https://www.avdweb.nl/solar-bike/hub-motor/yamaha-pw-se https://www.avdweb.nl/Article_files/Solarbike/Images-hub-motors/Yamaha-PW-SE/Yamaha-PW-SE-tear-down4.JPG https://www.avdw...
by avandalen
May 24 2019 3:55am
Forum: Battery Technology
Topic: Bluetooth BMS with IR compensation
Replies: 3
Views: 427

Re: Bluetooth BMS with IR compensation

why would you care about the IR on a bike with lifepo4 cells? what specific advantage are you trying to gain? more accurate SoC? apart from those questions: why would you ever use lifepo4 on a BIKE? Only a LiFePO4 battery is suitable for my solar bike because of the high charging current (sometimes...
by avandalen
May 23 2019 5:05am
Forum: Battery Technology
Topic: Bluetooth BMS with IR compensation
Replies: 3
Views: 427

Bluetooth BMS with IR compensation

For a small production of solarbikes I need a Bluetooth BMS with internal resistance compensation. I can't find anything on the web. I charge the 36V LiFePO4 at 8A, without IR compensation this is not possible. Ubattery = U open + Icharge * RI. There has to be compensated for Icharge * RI. I have no...
by avandalen
May 21 2019 7:42am
Forum: Motor Technology
Topic: Bosch Active Line 3 motor graphs
Replies: 2
Views: 798

Re: Bosch Active Line 3 motor graphs

I dont have this
by avandalen
May 14 2019 2:20am
Forum: Motor Technology
Topic: Bosch Active Line 3 motor graphs
Replies: 2
Views: 798

Bosch Active Line 3 motor graphs

In my article about the Bosch Active Line 3, I have added the motor graphs. https://www.avdweb.nl/Article_files/Solarbike/Images-hub-motors/Bosch-active-line-3/Bosch-Active-Line-motorgraph-19V.jpg Read the article here: https://www.avdweb.nl/solar-bike/hub-motor/bosch-active-line-3/bosch-active-line...
by avandalen
Oct 05 2018 4:50am
Forum: E-Bike General Discussion
Topic: Wanted lightweight Ebike maximum 16kg / 35lbs
Replies: 0
Views: 479

Wanted lightweight Ebike maximum 16kg / 35lbs

I want to build a second Maxun One solar bike. The total weight including solar panels must be less than 18 kg. Actually, I wanted to let make a special aluminum frame, but maybe there are lightwight ebikes that I can rebuild. http://www.avdweb.nl/images/thumbnails/Article_files/Solarbike/Images2/Al...
by avandalen
Sep 21 2018 9:51am
Forum: Motor Technology
Topic: Bosch Active Line 3 mid-drive motor tear down
Replies: 5
Views: 2661

Re: Bosch Active Line 3 mid-drive motor tear down

robbie wrote:
Sep 09 2018 12:59pm
A great tear down, and fantastic website by the way.

Have you figured out where you can remove any material to lighten the product up?
No it is not possible.
I will switch to a Shimano Steps E8000 (2.88kg) or Brose mid drive motor (2.9kg in 2019)
by avandalen
Sep 08 2018 9:50am
Forum: Motor Technology
Topic: Bosch Active Line 3 mid-drive motor tear down
Replies: 5
Views: 2661

Bosch Active Line 3 mid-drive motor tear down

For my solar powered bicycle, the Maxun One, I designed a very powerful and lightweight mid-drive motor. I also wanted to investigate whether I could use a Bosch Active Line 3 motor. The Bosch motor weight is 2975g, this is relatively lightweight for a mid-drive motor, but it is still too heavy for ...
by avandalen
Oct 13 2017 7:51am
Forum: E-Bike Technical
Topic: Sensitive Hall sensor for wheel speed measurement
Replies: 2
Views: 470

Sensitive Hall sensor for wheel speed measurement

Bicycle speed measurement is generally done with a spoke magnet and a reed relay sensor. If this is done on the rear wheel, there is a large spacing between the spoke magnet and the chain stay, where the sensor is mounted on. Therefore, the sensor has to be mounted on a relatively long bracket to mi...
by avandalen
May 16 2017 3:33am
Forum: Motor Technology
Topic: Regen for the dummies ?
Replies: 3
Views: 1102

Re: Regen for the dummies ?

>>>Can this damage the battery?
Maybe the BMS can be overloaded, since the charge Mosfets are just dimensioned for charging with low current.
by avandalen
Sep 14 2015 7:03am
Forum: E-Bike Build Threads / Photos & Video
Topic: My new Maxun One solar bike
Replies: 44
Views: 8143

Re: My new Maxun One solar bike

Here is a video of the Maxun One solar bike, that shows the motorpower and solarpower at a speed of about 25 km/h.
Image

by avandalen
Mar 25 2015 4:07am
Forum: E-Bike Build Threads / Photos & Video
Topic: My new Maxun One solar bike
Replies: 44
Views: 8143

Re: My new Maxun One solar bike

Ice rider, It is very easy to overlook details when comparing what appear to be similar things but the devil is always in the details. Your trike has the panels overhead so you are not going to create a shadow over them with your body. Just one cell covered by shadow will render that whole panel in...
by avandalen
Mar 25 2015 3:54am
Forum: E-Bike Build Threads / Photos & Video
Topic: My new Maxun One solar bike
Replies: 44
Views: 8143

Re: My new Maxun One solar bike

No, I am saying that his 200W of panel are producing ~100W and that will get him 16.7kph with NO drain on his battery. And I am saying that those numbers are pretty good because my terratrike cruiser goes 7-12 mph with a single 100W panel (producing say ~60W) and no battery at all. And yes, with a ...
by avandalen
Mar 25 2015 3:40am
Forum: E-Bike Build Threads / Photos & Video
Topic: My new Maxun One solar bike
Replies: 44
Views: 8143

Re: My new Maxun One solar bike

The solar panels on the bike are far less than required to propel the bike along at the claimed speed. I posted a third party video to demonstrate that. Actually, he is sporting between 150 and 200W of panels. Around noon and in summer, say he can generate 100W solar. With 100 kg of bike and rider ...
by avandalen
Mar 25 2015 3:20am
Forum: E-Bike Build Threads / Photos & Video
Topic: My new Maxun One solar bike
Replies: 44
Views: 8143

Re: My new Maxun One solar bike

lester12483 wrote:Cool solar bike. Well done sir!!

How much did it cost you to build?
The only thing I can say is that it was very expensive.
by avandalen
Mar 25 2015 3:14am
Forum: E-Bike Build Threads / Photos & Video
Topic: My new Maxun One solar bike
Replies: 44
Views: 8143

Re: My new Maxun One solar bike

This thing looks irresponsibly dangerous. Things like this give joe average the feeling that the world energy crisis can be solved with a few solar panels. In recent times heavily government funded rebates and feed in tariffs in Australia have seen a boom in grid connected solar. People think they ...
by avandalen
Mar 24 2015 3:52pm
Forum: E-Bike Build Threads / Photos & Video
Topic: My new Maxun One solar bike
Replies: 44
Views: 8143

Re: My new Maxun One solar bike

mushymelon wrote:This thing looks irresponsibly dangerous.
Yes I hear this often :? . But do you know what's really dangerous? Riding in a 1200kg car.
by avandalen
Mar 24 2015 3:44pm
Forum: E-Bike Build Threads / Photos & Video
Topic: My new Maxun One solar bike
Replies: 44
Views: 8143

Re: My new Maxun One solar bike

The unfortunate thing is people will believe it actually works. Some basic maths will tell you the battery and pedalling are doing all the work. For a realistic demonstration of what the panels might be adding to the equation see this video by Terry Hope. https://m.youtube.com/watch?v=go9vbhrXoEU N...
by avandalen
Mar 24 2015 3:37pm
Forum: E-Bike Build Threads / Photos & Video
Topic: My new Maxun One solar bike
Replies: 44
Views: 8143

Re: My new Maxun One solar bike

melodious wrote:Your next step is to put it on a recumbent or better yet a velomobile :idea:

How many solar watts are you able to provide? The picture looks like your making good speed.
Sometimes 200W, but normally 180W, in the afternoon 150W or less at full sunlight.
by avandalen
Mar 24 2015 3:34pm
Forum: E-Bike Build Threads / Photos & Video
Topic: My new Maxun One solar bike
Replies: 44
Views: 8143

Re: My new Maxun One solar bike

TSAR wrote:With the right angle and a strong enough gust, this solar project may turn into a wind projectile.
Maybe you could use it as a sail...
There is no noticeable wind drag.