DC power distribution system
AssigneeMitsubishi Electric Corporation
InventorKenichi Fukuno
Life of this patent
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Abstract
In the conventional elimination of a short-circuited point by using fuses, due to the fuse characteristics, it is not possible to ensure cooperation at the respective melting times of fuses in a short-circuit state. To solve such a problem, provided are a converter which limits a current passing through a distribution line in a short-circuit state and has a constant power drooping characteristic of passing a current greater than or equal to a rated current through the distribution line for a fixed time, and relays which have an operating characteristic of detecting a current greater than or equal to the rated current and hierarchically opening switches within the fixed time.
Claims15
A DC power distribution system comprising:
- a converter for converting power from a power supply into DC power;
- a plurality of distribution lines branched for supplying power from the converter to a plurality of loads;
- a first switch connected between the converter and a branch of each of the distribution lines to open/close an electric path;
- a second switch connected between the branch and the corresponding load to open/close an electric path;
- a first relay for opening the first switch;
- and
- a second relay for opening the second switch, wherein
- the converter limits a current passing through the distribution lines in a short-circuit state, and has a constant power drooping characteristic of passing a current greater than or equal to a rated current through the distribution lines for a fixed time, and
- the first and second relays detect the current greater than or equal to the rated current, and have an operating characteristic of hierarchically opening the first and second switches within the fixed time.
Dependencies are inferred from the claim text.