B&R Electronics High Power Design

Neil Barabas

50kW using a modular design and all off the shelf parts.  

240/480VAC 3 phase input  

Programmable 10 - 100V, 0 - 500A DC output, constant current.  

$0.06 per watt, including card cage, intercooler, and fans.

Input/Output isolation.   High MTBF- no optos or electrolytic caps. 

Measured 94%efficiency.

Single 8kW Power board: Consists of two 4kW modules ( you can see symmetry

between upper and lower halves of the board, for the right-most two-thirds).

The 4kW modules are put in series for 480V input, parallel for 240V input.