Analog ELC building instruction - not a finished product.
Not recommended anymore - the digital remotehydrolight is an improved version of the hummingbird.
Based on a Picmicro MCU. Instruction - not a finished product. Knowledge how to program microchip pics is necessary.
This ELC has some clever ideas, like prioritized user loads.
However any modifications require modifying the code and reprogramming of the microcontroller
Also it has no protection features (operating parameter monitoring), and the design is optimized for cost (no optocouplers). This is perfectly okay if the designer/manufacturer of the ELC is also the operator.
As of 2017, M. Mornhinweg also sells a finished 20kW version for 1000 USD.
Originally based on the Hummingbird from Jan Portegijs, it's now a simplified microcontroller based design.
The PCBs are produced in batches of 100, and then hand-soldered in through-hole technology in a shop in Pakistan.
Quality of the soldered PCB can vary - each one needs to be checked.
The final assembly is done by trained locals in Afghanistan.
For larger capacities, multiple ELCs are operated in parallel.
Design and software available on the website (registration required)
Available product
Conventional digital ELC (DLC), similar to the PME one
Digital Flow Controller, similar to the hydrocontrol
Available product. No technical details available on the website
Available product.
The 20kW version was around 1000 USD in the year 2010.
Available product, allthough website has not been updated since 2014.
Prices available online.
no other technical details available, the images suggest triac switching
Available product.
MAP electronics
http://mapelectronics.co.in/index.php/products/electronic-load-controllers
From the description:
In our ELCs, power control (Current Ampere measurement) as well as frequency control are employed which makes the system response very fast.
Also, our ELCs have a perfect sine-wave output and no waveform distortion (zero crossing switching).
Range of 3kW to 100kW, for 3 phase as well as 1 phase.
Switching gear for grid-connected hydro power plants, USA:
http://www.beckwithelectric.com/products/m-3410.html
Link collections
http://www.waterpowermagazine.com/contractors/governors-electrical/
New Zealand Digital Library NZDL
http://microhydropower.net/directory/manufacturers.php
Philosophy and Science blog (only in German)
Erkenntnisgewinne - Inquisitio Veritatis
Wie Geschichte, Philosophie, Religion und Naturwissenschaften zusammenhängen.
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