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K. Edelmoser:
"DC-to-DC Solar Power Converter for Parallel String Operation in Multi Source Structures";
Poster: International Conference on Power Conversion and Intelligent Motion (PCIM), Nuremberg, Germany; 12.05.2002 - 16.05.2002; in: "Proceedings of the international Power Conversion Conference PCIM '02", (2002), S. 381 - 386.

In the field of low voltage (e.g. battery powered solar) converter applications very high primary current ratings have to be handled. This leads to a problematic design with efficiency restrictions. This leads to a problematic design with noticeable efficiency restrictions. To improve the overall efficiency of the inverter and to reduce the input capacitor, a possible solution is the parallel operation of several converter stages. Here, a special disadvantage has to be marked: The parallel operation of conventional DC-to-DC converters with voltage source characteristics mostly used requires special control mechanism to ensure correct power distribution. Contrary to this behavior, current sourced converter types can act in parallel without any special measurements. The solution proposed in this paper is capable to improve the parallel operation of power stages in conventional converters with modern current sharing techniques. Due to the reduced current in each of the paralleled output stages, the efficiency will increase significantly. In this paper a 12V / 500W converter is described. The concept is well suited for solar and renewable energy as well as aerospace applications.