KichTuDocLap (39).pdf

KichTuDocLap (39).pdf - Đồ án điện tử công suất...

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Đồ án đ i n t công su t 38 Dßng qu¸ t¶i I qt = 1,5I td = 1,5 3 .5,96 = 15,48 (A) Chän cÇu dao cã dßng ®iÖn ®Þnh møc I đ m = I qt = 1,1I td = 1,1 3 .5,96 = 11,35 (A) CÇu dao dïng ®Ó t¹o khe hë an to μ n khi söa ch÷a hÖ truyÒn ®éng. Dïng c©u d ch× d©y chÈy t¸c ®éng nhanh ®Ó b¶o vÖ ng¾n m¹ch cho c¸c tiristor, ng¾n m¹ch ®Çu ra cña bé chØnh l u - Nhãm 1CC Dßng ®Þnh møc d©y ch y nhãm 1CC I 1cc = 1,1I 2 = 1,1.8,165 = 8,98 (A) - Nhãm 2CC Dßng ®Þnh møc d©y ch y nhãm 2CC I 1cc = 1,1I lv = 1,1.3,33 = 3,663 (A) - Nhãm 3CC Dßng ®Þnh møc d©y ch y nhãm 3CC I 1cc = 1,1I d = 1,1.10 = 11(A) VËy chän cÇu ch× cã d©y ch y l μ : víi nhãm 1CC lo¹i 10(A) víi nhãm 2CC lo¹i 5(A) víi nhãm 3CC lo¹i 15(A) d. b¶o vÖ qu¸ ®iÖn ¸p cho van - B¶o vÖ qu¸ ®iÖn ¸p : Do qu¸ tr×nh ®ãng c¾t c¸c tiristor ®
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