세미나 emc대책 - ::: daq system ::: · pdf file · 2013-10-12-> emi...

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세미나 세미나 EMC 대책 디에이큐시디에이큐시 2011. 09. 26 Tel)031-737-2018,9 www.daqsystem.com postmaster@daqsystem com 1 http://www.daqsystem.com postmaster@daqsystem.com

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Page 1: 세미나 EMC대책 - ::: DAQ SYSTEM ::: · PDF file · 2013-10-12-> EMI 발생이적고, EMS가적거나Immunity ... Conducted Emission 또는Radiated Emission ... (Conducted Susceptibility/Immunity):

세미나세미나EMC 대책

디에이큐시스템디에이큐시 템2011. 09. 26

Tel)031-737-2018,9www.daqsystem.com

postmaster@daqsystem com

1 http://www.daqsystem.com

[email protected]

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목 차

1. EMC 개요

2. 주요 3요소

3. NOISE 종류와 시험

4. EMC 대책

5 전자파 규제5. 전자파 규제

6. 신뢰성

2 http://www.daqsystem.com

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1. EMC 개요

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EMC : Electro-Magnetic Compability(전자파 적합성)g p y

-. 기기외부로불요전자파를최소한방출하여다른기기에전자파간섭을일으키지않음일으키지않음.

-. 외부로부터의전자파간섭에영향을받아도정상적으로동작할수있는상태.

-> EMI 발생이적고, EMS가적거나 Immunity가강한상태

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EMI : Electro-Magnetic Interference/Emission(전자파 장애)g

-. Conducted Emission또는 Radiated Emission되는전자파가다른기기에장해발생

-. CE : 주로 30MHz 이하에서발생전자파가신호선또는전원선같은매질을통해서전달되는전자파잡음측정장소 : Shield room

-. RE :주로 30MHz이상에서발생주로 30MHz 이상에서발생전자파가공기중으로방사되어전달되는전자파잡음측정장소 : Open Site, Semi-Anechoic room, Full -Anechoic room

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EMS : Electro Magnetic Susceptibility(전자파 감수성)g p y

-. 기기가외부로부터전자파간섭을받을때영향받는정도

-. CS (Conducted Susceptibility/Immunity): 외부케이블,파워코드,I/O컨넥터등을통해들어오는전자파간섭에견디는정도

-. RS(Radiated Susceptibility/Immunity) :공기에서전파된전자파간섭에 견디는정도

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Pulsed EMI

-. ESD(Electrostatic Discharge) :서로다른정전기전위를가진물체가접근혹은접촉시갑작스러운서로다른정전기전위를가진물체가접근혹은접촉시갑작스러운전하의이동으로인해과전류가흘러서오작동을일으키는현상

-. EFT/Burst (Electrical Fast Transient/Burst): 전기적빠른과도현상

-. Surge :수 us ~수초간지속되는전압전류전력의과도현상수 us ~ 수초간지속되는전압,전류,전력의과도현상

-. Voltage Dip : 전자시스템의한지점에서전압이급격히감소했다가, 전압이회복되는현상

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EMP(Electro Magnetic Pulse)g

-. 과도적으로높은세기의전자기장. 광대역,대전력의영향을받는현상

-. 주로핵폭발에관계 , 번개?

Harzard

-. 유기체의건강,생존,번식에미치는위협

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2. 주요 3요소

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3. Noise의 종유와 시험

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4. EMC 대책

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Noise 침입 경로 파악

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Noise 성질 파악

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원인과 대책

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접지 기술

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접지 기술

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접지 기술

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Crosstalk

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Decoupling Condenser

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설계 지침

신호루프면적은최소로-. 신호루프면적은최소로

-. 커넥터사이에고속회로배치금물 : 안테나로동작안테나로동작

-. Transient Time 조절 : digital 신호의 rise, fall time. Serial저항사용

-.Solid return Plane에 Gap 금지

-. 적절한 Decoupling Capacitance : 적절한 p g p전원과접지면사이간격고려, 능동부품 vcc단, 고주파저주파별다른값대응전원과접지면사이인덕턴스는최소로

외부커넥터는같은한쪽면에위치-. 외부커넥터는같은한쪽면에위치 : 부품의안테나화방지

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설계 지침

외부와연결되는부품은커넥터에근접-. 외부와연결되는부품은커넥터에근접 :관련없는부품은 2cm이상이격같은외부와연결되는부품은같은커넥터로연결

-. Clock 드라이버는오실레이터근처에위치 : 루프면적감소

-. 전원판은같은층에

-. 주요신호 trace는전원판과접지사이에위치, 보드가장자리회피

-. 고주파신호라우팅주의 :주파신호라우팅주의I/O부품사이는회피 -> 방사발생또는간섭됨

- .부품의전원단은최근접 via로연결

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5. 전자파 규제

기기자체및 상호간의장해와오동작방지-. 기기자체및 상호간의장해와오동작방지-. 방송신호등유무선통신망보호-. EMC 사고에의한인명,재산상의보호-.무역장벽(수입규제).무역장벽(수입규제)

IECEE : CB 미국 : UL, ETL, MET *FCC는전저파규격캐나다 : CSA유럽 : CE독일 : TUV,GS 사우디아라비아 : SASO사우디아라비아 : SASO 노르웨이 : DNV 일본 : VCCI, PAL 룩셈부르크 : SNCH 한국 : KOLAS,KC

* Class A Class B

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* Class A, Class B

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6. 신뢰성 시험

환경-. 환경 :내한성시험(-40℃), 내열성시험(+200℃), 내습성시험(+30℃, 95%), 온도변화시험(-40~150℃), 열충격시험(-40 ~ +140℃),고온고습시험(+80℃,95%), 온습도싸이클시험(-40~150℃ /~95%)고온고습시험( 80℃,95%), 온습도싸이클시험( 40 150℃ / 95%)

-. 안전 : 난연성시험, 내전압시험, 누설전류시험, 절연저항시험, 소비전력시험, 소비전류시험소비전류시험

-. 기구적: 진동시험, 낙하시험, 스프링해머충격시험진동시험,낙하시험, 링해머충격시험

-.노이즈 : 정전기시험, 임펄스노이즈시험, V lt Di /I t ti t t LIGHTNING SURGE TEST 전압변동시험Voltage Dip/Interruption test, LIGHTNING SURGE TEST, 전압변동시험,주파수변동시험

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The EndThe End

감사합니다26 http://www.daqsystem.com

감사합니다.