電工基礎(chǔ)知識入門

1、目錄第一章第一章直流電路直流電路...................................................................................................................................51—1電學(xué)的基本物理量.............................................................

2、......................................................5一、電量............................................................................................................................................5二、電流................

3、............................................................................................................................5三、電壓...........................................................................................

4、.................................................6四、電動勢、電源............................................................................................................................7五、電阻.................................

5、...........................................................................................................7六、電功、電功率........................................................................................................

6、....................8七、電流的熱效應(yīng)..........................................................................................................................101—2電路..............................................................

7、.......................................................................11一、電路的組成和作用..................................................................................................................11二、電路圖................

8、......................................................................................................................11三、電路的三種狀態(tài)...........................................................................................

9、...........................121—3歐姆定律.................................................................................................................................12一、一段電阻電路的歐姆定律........................................

10、..............................................................12二、全電路歐姆定律......................................................................................................................131—4電阻的串聯(lián)、并聯(lián)電路..............

11、...........................................................................................14一、電阻的串聯(lián)電路......................................................................................................................

12、14二、電阻的并聯(lián)電路......................................................................................................................161—5電工測量基本知識..............................................................................

13、...................................17一、萬用表的外形及基本組成......................................................................................................18二、萬用表的使用步驟........................................................

14、..........................................................20三、萬用表的使用注意事項..........................................................................................................20習(xí)題......................................

15、........................................................................................................20第二章第二章電磁的基本知識電磁的基本知識..............................................................................................

16、.......................222—1磁的基本知識.........................................................................................................................22一、磁現(xiàn)象..........................................................

17、............................................................................22二、磁場、磁感應(yīng)線......................................................................................................................22三、磁通、磁感應(yīng)強度...

18、...............................................................................................................23四、磁導(dǎo)率......................................................................................................

19、................................242—2電流的磁場.............................................................................................................................25一、通電直導(dǎo)線的磁場.........................................

20、.........................................................................25二、通電螺線管的磁場..................................................................................................................254—1變壓器的基本結(jié)構(gòu)和工作原理...

21、..........................................................................................54一、變壓器的基本結(jié)構(gòu)..................................................................................................................55二、

22、變壓器的工作原理..................................................................................................................56三、幾種常見變壓器.......................................................................................

23、...............................58四、變壓器的主要技術(shù)數(shù)據(jù)..........................................................................................................59五、變壓器的使用要點.........................................................

24、.........................................................604—2三相異步電動機的用途和結(jié)構(gòu).............................................................................................60一、電動機概述...........................................

25、...................................................................................60二、三相籠式異步電動機的基本結(jié)構(gòu)..........................................................................................614—3三相異步電動機的轉(zhuǎn)動原理............

26、.....................................................................................62一、演示實驗...............................................................................................................................

27、...62二、定子旋轉(zhuǎn)磁場的產(chǎn)生..............................................................................................................62三、旋轉(zhuǎn)磁場對轉(zhuǎn)子的作用................................................................................

28、..........................644—3三相異步電動機的使用.........................................................................................................65一、啟動....................................................................

29、......................................................................65二、反轉(zhuǎn)..........................................................................................................................................66三、制動

30、..........................................................................................................................................66四、三相籠式異步電動機的銘牌數(shù)據(jù)................................................................

31、..........................67五、三相異步電動機使用要點......................................................................................................684—5單相異步電動機.................................................................

32、......................................................69第五章第五章簡單機床電路簡單機床電路.........................................................................................................................715—1常用低壓電器..............

33、...........................................................................................................72一、開關(guān)...........................................................................................................

34、...............................72二、接觸器......................................................................................................................................75三、熱繼電器........................................

35、..........................................................................................76四、熔斷器...........................................................................................................................

36、...........765—2機床的幾種控制線路.............................................................................................................78一、點動控制線路............................................................................

37、..............................................78二、看懂機床控制線路的基本要領(lǐng)..............................................................................................78三、接觸器自鎖控制線路..................................................

38、............................................................79四、接觸器聯(lián)鎖的正反轉(zhuǎn)控制線路..............................................................................................81五、C620—1型車床控制線路................................

39、.......................................................................83習(xí)題..........................................................................................................................................84第六章第六