PROBLEM TO BE SOLVED: To prevent an overcurrent from flowing to a cross flow detector due to mechanical delay of a contactor.SOLUTION: A cross flow detector 20 includes cross flow current detectors 21, 22 for detecting a cross flow, flowing only between inverters 11 connected in parallel, and outputting to a control section 12 for controlling the inverters 11, and a contactor 24 for cross flow detection protecting the cross flow detector 20. An auxiliary power supply device 10 includes the inverter 11 for converting a DC power into an AC power, the cross flow detector 20 for detecting a cross flow, and the control section 12 for controlling the voltage and phase outputted from the inverter 11, based on the cross flow detected by the cross flow detector 20. If a trunk line abnormality is not generated after a contactor 50 for load is closed, the control section 12 outputs a closing command to the contactor 24 for cross flow detection.SELECTED DRAWING: Figure 1
【課題】接触器の機械的遅れに起因して横流検出回路へ過電流が流れることを防止する。【解決手段】横流検出回路20は、並列に接続されたインバータ11の間にのみ流れる横流を検出し、インバータ11を制御する制御部12に出力する横流電流検出部21,22と、横流検出回路20を保護する横流検出用接触器24とを備える。補助電源装置10は、直流電力を交流電力へ変換するインバータ11と、横流を検出する横流検出回路20と、横流検出回路20により検出された横流に基づき、インバータ11から出力される電圧及び位相を制御する制御部12とを備え、制御部12は負荷用接触器50が投入された後に、幹線異常が発生していない場合に、横流検出用接触器24に投入指令を出力する。【選択図】図1
CROSS FLOW DETECTOR, AUXILIARY POWER SUPPLY DEVICE, AND AUXILIARY POWER SUPPLY SYSTEM
横流検出回路、補助電源装置、及び補助電源システム
2016-10-13
Patent
Elektronische Ressource
Japanisch
IPC: | H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS , Schutzschaltungsanordnungen / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen |
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