🎉We can now proudly present the winners of the TAPAS Community Challenge 2018! 🎉
Congratulations to Team "Wireless Charging" (idea 56). We are really excited for all finalists and a really big thank you to all participants for your interest in this challenge!

We got over 200 submissions! 65 ideas got one or more TAPAS boards, 10 submissions were presentation-ready.
And now we have 5 finalists! YEAH 😃 The finalist's idea numbers were 40, 56, 68, 212 and 213.
What's next?
We are now preparing the next steps for you, the community. Please stay tuned!
We are working on a forum and a separate webpage. If you have any question please don't hesitate to contact us via email!

Bicycle generator

A traditional bicycle 'dynamo' (actually an alternator)  achieves well-regulated power for a simple load with a clever combination of internal resistance, reactance and magnetic saturation. For an incandescent bulb of known power this is a mature and efficient implementation. 

However, modern loads are more complex. They may include flashing LEDs, battery charging and transient loads. A single solution to suit these varying loads is far more wasteful because it cannot match the source impedance with the load impedance for optimal power transfer.

A variable transformer operated by a power matching algorithm would provide a more flexible match, but such complex transformers are no longer necessary when digital switching and inverter technology  can simulate them more compactly.

This suggestion is to provide maximum-power matching for a range of loads in the form of a 'smart rectifier', with some user or automatic control to obtain 'free' power downhill while minimising extra effort when there is a heavy kinetic load uphill. It could be implemented using a 3-phase hub motor functioning as a generator, providing additional possibilities of regenerative braking and motor assist. Other generator applications will also benefit.

The objectives can be met with a single TAPAS board.

  • adrian godwin
  • May 2 2018
  • Admin
    Nora Schille (TAPAS team) commented
    May 03, 2018 12:32

    Hey Adrian,

    this idea sounds great!
    But we need some more information about this idea.
    * Can you get a little deeper into the technical site and explain your set-up and the usage of the TAPAS board? Can you provide a sketch or diagram.
    Thank you!
    Nora @ TAPAS team

You can read the official challenge FAQ here!