https://github.com/perrette/ebikesimulator

How much energy is required for this track?
https://github.com/perrette/ebikesimulator

Last synced: about 1 year ago
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How much energy is required for this track?

• Host: GitHub
• URL: https://github.com/perrette/ebikesimulator
• Owner: perrette
• Created: 2019-09-15T10:04:41.000Z (almost 7 years ago)
• Default Branch: master
• Last Pushed: 2019-09-15T10:50:14.000Z (almost 7 years ago)
• Last Synced: 2025-02-05T08:51:35.806Z (over 1 year ago)
• Language: Jupyter Notebook
• Size: 1.75 MB
• Stars: 1
• Watchers: 2
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

          
# ebikesimulator

How much energy is required for this track?

Look at [range_calculator.ipynb](range_calculator.ipynb) to see what I mean.

It reads gpx track (must have elevation) and calculate energy requirements.

For instance from a trip planned with Komoot:

![figs/capaccio-pietrapaola.png](figs/capaccio-pietrapaola.png)

this is one of the outputs, using:

- 100kg weight

- 100W human power

- 250W motor power most of the time, with 80% efficiency

- speed between 10 and 32 km/h 

- CdA = 0.5 for air drag, and Crr = 0.005 for rolling friction 

Note the "balance" speed is calculated for constant power human + motor x efficiency, but within imposed bounds, energy available for "regen" braking calculated for negative load (when regen efficiency is similar to motor efficiency 80% at best)

![plot](figs/load-cumulative-regen-vs-efficiency.png)

Disclaimer

----------

- It is not tested (yet) against real data, especially needed are data w.r.t real motor efficiency.

- At this point the repository is used by myself to know which ebike system/battery packs to use, and put here for sharing with friends/interested people, it is not a user-friendly tool. It is a bunch of jupyter notebooks, but it could be improved and organized in an online tool like https://www.ebikes.ca/tools/simulator.html