LED SEQUENTIAL POWER SUPPLY CONTROL SYSTEM FOR LED DISPLAY BOARDS

A sequential power supply control system of an LED display board according to the present invention supplies a relay control signal and a current and voltage measurement signal controlled and output from a central processing unit (CPU) to each of the relay unit (20), the current measurement sensor u...

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Bibliographische Detailangaben
Hauptverfasser: YUN HO CHAN, SONG SEOK GYU
Format: Patent
Sprache:eng ; kor
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Zusammenfassung:A sequential power supply control system of an LED display board according to the present invention supplies a relay control signal and a current and voltage measurement signal controlled and output from a central processing unit (CPU) to each of the relay unit (20), the current measurement sensor unit (30), and the voltage measurement sensor unit (40), turns on a first relay (21) of the relay unit (20), checks the current and voltage of the power input through an active line (V) and a neutral line (N) of the AC power connected to a three-phase, four-wire power input terminal unit (10) by a first current measurement sensor (31) and a voltage measurement sensor (41) of the current measurement sensor unit (30) and the voltage measurement sensor unit (40), respectively, checks whether a surge voltage is introduced due to an inrush current, if there is no abnormality, supplies stable power to a first cabinet (61) of a first cabinet unit (60) through a first output terminal (51) of an output terminal unit (50), and then sequentially turns on a second relay (22) to an N^th relay (26), sequentially checks the current and voltage of the power input in real time by a second current measurement sensor (32) to an N^th current measurement sensor (36) and a second voltage measuring sensor (42) to an N^th voltage measurement sensor (46) of the current measurement sensor unit (30) and the voltage measurement sensor unit (40), checks whether a surge voltage is introduced due to an inrush current, and if there is no abnormality, distributes and supplies stable power to a second cabinet (62) to an N^th cabinet (66) of the first cabinet unit (60) sequentially through a second output terminal (52) to an N^th output terminal (56) of the output terminal unit (50). Accordingly, a stable power supply can be provided. 본 발명에 따른 LED 전광판의 순차 전원 공급 제어 시스템은 중앙처리장치(CPU)로부터 제어되어 출력되는 릴레이 제어 신호와 전류 및 전압 측정 신호를 릴레이부(20)와 전류 측정 센서부(30) 및 전압 측정 센서부(40) 각각에 공급하되, 상기 릴레이부(20)의 제1 릴레이(21)를 온 시켜 3상 4선식 전원 입력 단자부(10)와 접속된 AC 전원의 활성선(V) 및 중성선(N)을 통하여 입력되는 전원의 전류 및 전압을 전류 측정 센서부(30) 및 전압 측정 센서부(40) 각각의 제1 전류 측정 센서(31) 및 전압 측정 센서(41)에 의하여 체킹하여 돌입전류에 의한 서지전압 유입 여부를 확인하여 이상 없으면 출력 단자부(50)의 제1 출력단자(51)를 통하여 제1 캐비닛부(60)의 제1 캐비닛(61)에 안정적인 전원을 공급한 다음 제2 릴레이(22) 내지 제N 릴레이(26)를 순차적으로 온 시켜 실시간으로 입력되는 전원의 전류 및 전압을 전류 측정 센서부(30) 및 전압 측정 센서부(40) 각각의 제2 전류 측정 센서(32) 내지 제N 전류 측정 센서(36) 및 제2 전압 측정 센서(42) 내지 제N 전압 측정 센서(46)에 의하여 순차적으로 체킹하여 돌입전류에 의한 서지전압 유입 여부를 확인하여 이상 없으면 출력 단자부(50)의 제2 출력단자 (52) 내지 제N 출력단자(56)를 통하