KichTuDocLap (25).pdf

# KichTuDocLap (25).pdf - Đồ án điện tử công suất...

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Đồ án đ i n t công su t 24 b) Nguyªn lý ho¹t ®éng cña s¬ ®å nguyªn lý S¬ ®å gåm hai bé biÕn ®æi BB§1v μ BB§2 ®Êu song song ng ¬ch víi nhau, cã c¸c cuén kh¸ng c©n b»ng L cb ®Ó kh«ng cho dßng ®iÖn ch¹y tõ bé BB§1 sang bé BB§2. Tõng bé biÕn ®æi cã thÓ l μ m viÖc ë chÕ ®é chØnh l u hoÆc nghÞch l u NÕu gãc α I l μ gãc më ®èi víi bé BB§1 v μ gãc α II l μ gãc më ®èi víi bé BB§2 th× sù phèi hîp gi÷a gãc α I, , α II ph¶i ® îc thùc hiÖn theo quan hÖ α I + α II = 180, sù phèi hîp n μ y gäi l μ phèi hîp tuyÕn tÝnh Gi¶ sö cÇn ®éng c¬ quay thuËn ta cã BB§1 l μ m viÖc ë chÕ ®é chØnh l u α I = 0 ÷ 90 U dI > 0, bÊy giê α II > 90 BB§2 l μ m viÖc ë chÕ ®é nghÞch l u U dII <0. C¶ hai ®iÖn ¸p U dI v μ U dII ®Òu ®Æt lªn phÇn øng cña cu¨ ®éng c¬ M, lóc n μ y dßng ®iÖn chØ cã thÓ ch¶y tõ bé BB§1 sang ®éng c¬ m μ
• Spring '16
• Stephanie Moore

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