Role of current limiters in on-board power distribution

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Dr. Szabó József
Department of Broadband Infocommunications and Electromagnetic Theory

My goal in this bachelor thesis was to examine different sorts of protection circuits used in satellite power distribution systems. After having provided a brief overview of historically relevant devices, I defined some concepts relevant to my subject and moved on to the most significant class of devices currently employed, which are called limiters. I presented the design, implementation and measurement process of some of the subtypes in order to give a broad picture on them. Lastly, I proved the correctness of the design considerations by looking at the measurements’ results.

The qualifying measurements yielded positive results in virtually all cases. Both the static and dynamic parameters of the devices satisfy the needs formulated in their respective specifications. We can see how different limiter types have different advantages and disadvantages and therefore should be applied in different situations. Admittedly, the devices could be further improved upon, and measuring their thermal properties is yet to be done.


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