Prof R T KennedyEMC & COMPLIANCE ENGINEERING 1 EET 422 EMC & COMPLIANCE ENGINEERING.

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Presentation transcript:

Prof R T KennedyEMC & COMPLIANCE ENGINEERING 1 EET 422 EMC & COMPLIANCE ENGINEERING

Prof R T KennedyEMC & COMPLIANCE ENGINEERING 2 TRIAC MT1 MT2 G MT1 MT2 G

Prof R T KennedyEMC & COMPLIANCE ENGINEERING 3

Prof R T KennedyEMC & COMPLIANCE ENGINEERING 4 MT2 +ve MT2 -ve

Prof R T KennedyEMC & COMPLIANCE ENGINEERING 5 TRIGGER DIAC

Prof R T KennedyEMC & COMPLIANCE ENGINEERING 6

Prof R T KennedyEMC & COMPLIANCE ENGINEERING 7 TRIAC- DIAC LAMP DIMMER V in RVRV DIAC C VCVC TRIAC LAMP V BO

Prof R T KennedyEMC & COMPLIANCE ENGINEERING 8 RVRV C V in VCVC I in V in I in VCVC VRVR I in leads V in by V C lags I in by 90 o V C lags V in by

Prof R T KennedyEMC & COMPLIANCE ENGINEERING 9 V in VCVC + V BO - V BO

Prof R T KennedyEMC & COMPLIANCE ENGINEERING 10 R V,min = 0R V,max VCVC V C and V in in phase V C lags V in by

Prof R T KennedyEMC & COMPLIANCE ENGINEERING 11 TRIAC- DIAC LAMP DIMMER V in 240 V rms RVRV DIAC C VCVC TRIAC LAMP 100  V BO   

Prof R T KennedyEMC & COMPLIANCE ENGINEERING 12 CLASS ACLASS C HARMONIC n ABSOLUTE LIMIT AMPERES ABSOLUTE LIMIT AMPERES % Fundamental x (power factor) n = 15  x (power factor)xI fundamental 0.1xI fundamental

Prof R T KennedyEMC & COMPLIANCE ENGINEERING 13 P ON pf V OMN V ORN 0.707

Prof R T KennedyEMC & COMPLIANCE ENGINEERING 14 I FRN I H3RN I H5RN I H9RN I H7RN I RN

Prof R T KennedyEMC & COMPLIANCE ENGINEERING 15 3 rd Harmonic5 th Harmonic power factorpf0.707 fundamentalI FRN A harmonic scalingI HRN I H3RN = 0.325I H5RN = 0.1 harmonic current I H,rms harmonic limitI Hlimit compliancePASS or FAILFAIL

Prof R T KennedyEMC & COMPLIANCE ENGINEERING 16 DIMMER & EMC V in 240 V rms RVRV DIAC C VCVC TRIAC LAMP 100  V BO  L