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§Ò tµi: ThiÕt kÕ m¹ch tù ®éng kÝch tõ cho ®éng c¬ ®ång bé §iÖn tö c«ng suÊt.

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Lêi giíi thiÖu................................................................................................................................4

Ch­¬ng I: Giíi thiÖu chung vÒ c«ng nghÖ vµ ph­¬ng ph¸p ®iÒu

khiÓn kÝch tõ cña ®éng c¬ ®ång bé ba pha................................... 5

I.1. Giíi thiÖu chung vÒ chñng lo¹i thiÕt bÞ ®­îc giao thùc hiÖn thiÕt kÕ, c«ng

nghÖ kÝch tõ. ........................................................................................................ 5

1. Nguyªn t¾c ®iÒu khiÓn më m¸y............................................................................ 5

2. Nguyªn t¾c ®iÒu chØnh kÝch thÝch ........................................................................ 6

I.2. §Ò xuÊt c¸c ph­¬ng ¸n tæng thÓ, ph©n tÝch ­u, nh­îc ®iÓm cña tõng

ph­¬ng ¸n ®Ó ®i ®Õn lùa chän mét ph­¬ng ¸n thùc thi thiÕt kÕ m¹ch lùc

vµ m¹ch ®iÒu khiÓn............................................................................................... 7

1. Giíi thiÖu vÒ m¹ch lùc............................................................................................ 7

2. Chän ph­¬ng ¸n chØnh l­u .................................................................................... 7

3. Giíi thiÖu chung vÒ m¹ch ®iÒu khiÓn .................................................................. 13

4. Lùa chän ph­¬ng ¸n thiÕt kÕ m¹ch ®iÒu khiÓn................................................... 15

Ch­¬ng II : ThiÕt kÕ m¹ch lùc........................................................................................... 18

1. TÝnh to¸n chän van ................................................................................................. 18

2. TÝnh to¸n c¸c th«ng sè ®iÖn ¸p, dßng ®iÖn vµ c«ng suÊt m¸y biÕn ¸p .................... 19

3. TÝnh to¸n m¹ch tõ MBA ......................................................................................... 19

Ch­¬ng III : ThiÕt kÕ m¹ch ®iÒu khiÓn .................................................................. 22

1.TÝnh to¸n kh©u ®ång pha vµ nguyªn lý ho¹t ®éng cña m¹ch. ........................ ......... 22

2.Kh©u t¹o ®iÖn ¸p r¨ng c­a ....................................................................................... 24

3. Kh©u so s¸nh........................................................................................................... 25

4. Kh©u ph¸t xung chïm ............................................................................................ 27

5. Kh©u khuyÕch ®¹i xung vµ biÕn ¸p xung................................................................. 29

6- TÝnh to¸n khèi nguån vµ MBA ®ång pha ............................................................... 32

7. TÝnh to¸n kh©u ph¶n håi ......................................................................................... 33

KÕt luËn........................................................................................................................... 35

Tµi liÖu tham kh¶o............................................................................................................ 36

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