44 dieu ap ba pha
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ba phaTRANSCRIPT
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4.3. iu p xoay chiu ba phaI. S ng lc. II. Nguyn l hot ng
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4.3. iu p xoay chiu ba phaI. S ng lc. S iu khin bng cp tiristor song song ngc
abc de
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S iu p xoay chiu bng triac
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S iu p c o chiu
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S ng lc in hnh thng gp
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II. Nguyn l hot ngNguyn tc dn dng trong s iu p ba pha Ba pha c van dn: UfT = UfLHai pha c van dn: UfT =(1/2)UdyTrn pha ang xt khng van dn UfT = 0
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1. Nguyn tc dn dng trong s iu p ba phaBa pha c van dn: UfT = UfLT1T2T3T5T4T6A1B1C1ABCZAZBZC0T1T2T3T5T4T6A1B1ABCZAZBZCT1T2T3T5T4T6A1B1C1ABCZAZBZCT1T2T3T5T4T6A1B1ABCZAZBZCC1
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Hai pha c van dn UfT =(1/2)Udy00
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2. Gii thch hot ng ca s (v d = 300)
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Mt s nhn xt v hot ng ca s trnin p ti c dng p mch
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Hot ng ca s khi gc m ln (v d = 1200)
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III. c im iu khin iu p ba phaiu khin iu p ba pha c th coi nh chnh lu cu ba ph
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iu khin bng bin p xung hai cun dy
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m xung trc tng khuch i
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iu khin bng xung n
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Mch iu khin
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iu khin iu p ba pha khi van l triac
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iu khin bng chm xung
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