KichTuDocLap (14).pdf

# KichTuDocLap (14).pdf - Đồ án điện tử công suất...

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Đồ án đ i n t công su t 13 tho¶ m·n hai ®iÒu kiÖn l μ U AK >0, I G2 >0 T 2 dÉn (T 1 ,T 3 kho¸) t ¬ng tù cho T 3 khi cã xung ®iÒu khiÓn I G3 th× T 3 dÉn (T 1 , T 2 kho¸ ) - Trong qu¸ tr×nh l μ m viÖc cña c¸c van nh trªn víi gi¶ thiÕt r»ng L d ®ñ lín ®Ó cho dßng ®iÖn l μ liªn tôc. - Trong kho¶ng thêi gian van dÉn dßng ®iÖn b»ng dßng ®iÖn cña t¶i khi van kho¸ th× dßng ®iÖn van b»ng ‘0’ lóc n μ y ®iÖn ¸p ng îc m μ van ph¶i chÞu b»ng ®iÖn ¸p d©y gi÷a pha cã van kho¸ víi pha cã van ®ang dÉn *§iÖn ¸p trung b×nh nhËn ® îc trªn t¶i l μ 5 π + α 6 π + α 6 2 2 2 d 3 6U 3 U 2.U sin θ d θ .cos α 1,17U cos α 2 π 2 π = = = = U do cos α *Dßng ®iÖn trung b×nh nhËn ® îc trªn t¶i l μ : I d = d d U R NhËn xÐt - Khi t¶i thuÇn trë dßng ®iÖn v μ ®iÖn ¸p trªn t¶i liªn tôc hay gi¸n ®o¹n phô thuéc
• Spring '16
• Stephanie Moore

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