PROBLEM TO BE SOLVED: To provide a technique capable of maintaining reliability of wire protection even when predetermined temperature estimation of an electric wire is performed in an electric wire arrangement configuration including an electric wire bundle.SOLUTION: An electric wire protection device 10 protects at least one electric wire 51 out of an electric wire bundle 52 in which a plurality of electric wires used for supplying power to a plurality of loads from a power source Ba are bundled. An arithmetic circuit 22 calculates a rise in temperature of the one electric wire 51 from the initial temperature when estimation is started on the basis of a detected load current Is and the thermal characteristics of the electric wire, and estimates the temperature of the one electric wire 51 by adding the temperature rise to the initial temperature. An energization information supply unit 23 supplies energization information related to the energization of loads other than one load to the arithmetic circuit 22. The arithmetic circuit 22 corrects the initial temperature with a correction value corresponding to the energization information at the start of the estimation.
【課題】電線束を有する電線配設構成において、所定の電線の温度推定が行われる場合であっても、電線保護の信頼性を維持できる技術を提供すること。【解決手段】電線保護装置10は、電源Baから複数の負荷へ電力供給するために用いられる複数の電線が束ねられた電線束52のうち少なくとも一電線51を保護する。演算回路22は、検出された負荷電流Isと電線の熱特性とに基づいて、推定開始時の初期温度からの一電線51の上昇温度を算出し、上昇温度を初期温度に加算して一電線51の温度を推定する。通電情報供給部23は、一負荷以外の負荷への通電に係る通電情報を演算回路22に供給する。演算回路22は、初期温度を、推定開始時における通電情報に対応した補正値によって補正する。【選択図】図3
ELECTRIC WIRE PROTECTION DEVICE
電線保護装置
2015-12-10
Patent
Electronic Resource
Japanese
ELECTRIC WIRE PROTECTION DEVICE, ELECTRIC WIRE PROTECTION METHOD, AND COMPUTER PROGRAM
European Patent Office | 2021
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