무정전 전원 장치

• Main Author: HAYASHI YOUSUKE
• Format: Patent
• Language: Korean
• Published: 12.01.2021
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

이 무정전 전원 장치(U1)에서는, 상용 교류 전원(41)의 정전 시에는, 스위치(1)를 오프시켜 상용 교류 전원(41)과 교류 입력 필터(2)를 전기적으로 분리하고, 제 1 및 제 2 콘덴서(C1, C2)의 단자간 전압(Ep, En)의 차인 직류 전압(ΔE=Ep-En)이 임계값 전압(ETH)을 초과한 경우에는, 컨버터(3)에 포함되는 제 1 및 제 2 IGBT 소자(Q1, Q2) 또는 제 3 및 제 4 IGBT 소자(Q3, Q4)를 온 및 오프시켜 직류 전압(ΔE)을 저감시킨다. In the present uninterruptible power supply apparatus (U1), in a power failure of a commercial AC power supply (41), a switch (1) is turned off to electrically cut off the commercial AC power supply (41) from an AC input filter (2), and when DC voltage (ΔE=Ep−En) that is the difference between terminal-to-terminal voltages (Ep, En) of first and second capacitors (C1, C2) exceeds a threshold voltage (ETH), first and second IGBT devices (Q1, Q2) or third and fourth IGBT devices (Q3, Q4) included in the converter (3) are turned on and off to reduce DC voltage (ΔE).