PROBLEM TO BE SOLVED: To provide a protection system of a feeder circuit for an electric propulsion device, capable of avoiding power feeding stop of the whole auxiliary machine feeder circuit when a short-circuit fault occurs at the terminal of the auxiliary machine feeder circuit, by blocking only an individual auxiliary machine feeder circuit in which the short-circuit fault has occurred.SOLUTION: A feeder circuit for an electric propulsion device comprising: a main feeder circuit for feeding power to a propulsion motor from a power source with a battery; and an auxiliary machine feeder circuit having individual auxiliary machine feeder circuits for feeding power to a plurality of auxiliary machines and which are branched for each of the auxiliary machines. In the auxiliary machine feeding circuit, an upstream-side overcurrent protection unit is provided on a source flow passage on the upstream side of the individual auxiliary machine feeder circuits of the auxiliary machine feeder circuit, a downstream-side overcurrent protection unit is provided in each of the downstream-side individual auxiliary machine feeding circuits, and a high-speed current-limiting unit is serially connected to each downstream-side overcurrent protection unit. When a short-circuit fault occurs at the terminal of the individual auxiliary machine feeder circuit, a short-circuit current is limited by the high-speed current-limiting unit to a current equal to or below a breaking current setting value of the upstream-side overcurrent protection unit, thereby the current is cut-off more quickly by the downstream-side overcurrent protection unit than the upstream-side overcurrent protection unit.
【課題】短絡事故が補機給電回路の末端で発生したとき、短絡事故の発生した個別補機給電回路のみを遮断して補機給電回路全体の給電停止になることを回避することのできる電気推進装置の給電回路の保護方式を提供する。【解決手段】電池を備えた電源から主給電回路と、複数の補機装置へ給電を行うために補機装置ごとに分岐された個別補機給電回路を有する補機給電回路とを備えた電気推進装置の給電回路において、前記補機給電回路の個別補機給電回路の上流側の源流路に、上流側過電流保護装置を、下流側の各個別補機給電回路に、下流側過電流保護装置を設け、前記下流側過電流保護装置にそれぞれ高速限流装置を直列に接続し、個別補機給電回路の末端で短絡事故が発生したとき、短絡電流を前記高速限流装置により前記上流側過電流保護装置の遮断電流設定値以下の電流に限流して前記上流側過電流保護装置より早く下流側過電流保護装置により遮断する。【選択図】図1
PROTECTION SYSTEM OF FEEDER CIRCUIT FOR ELECTRIC PROPULSION DEVICE
電気推進装置の給電回路の保護方式
2015-09-24
Patent
Electronic Resource
Japanese