Gio trnh My đin Trang 25 1.8 TƢ ̀ TRƢƠ ̀ NG LU ́ C CO ́ TA ̉ I CU ̉ A MA ́ Y ĐIÊ ̣ N MÔ ̣ T CHIÊ ̀ U 1.8.1 Đi cƣơng:            .                           (  ) do      .              f   b .             . 1.8.2 T trƣng trong dây qun phn ng: a) Sư ̣ phân bô ́ cu ̉ a tư ̀ trươ ̀ ng trên bê ̀ mă ̣ t phâ ̀ n ư ́ ng :  N:         . 2a:     . i  : 1   . I  : . a I i ö ö 2  = ]m[ö ö D. i.N    m A D  :         .   : F  = A .  :     ( m) => i   A  I    F   b) Phn ng phn ng trong my đin mt chiu:      1      ,                     .        ' '.        :          -S   :  2          0 (B = 0).       ,   .              ,  ,           . ,                         ,                                   Gio trnh My đin Trang 26                              , nên          .            .      ,            ,             .  2               0,                                                 (            ).                                          0,         ,                  .      N S n n' TTHH Tư ̀ trươ ̀ ng phần ca ̉ m Gio trnh My đin Trang 27 1.8.3 Tƣ ̀ trƣơ ̀ ng cƣ ̣ c tƣ ̀ phu ̣ :          (          0,5 Kw)                                 ,                                                                 ,               . ,                                                 . 1.8.4 Tƣ ̀ trƣơ ̀ ng dây quâ ́ n bu ̀ :                     ,                 .              ,       . Gio trnh My đin Trang 28                           .                          . .       :          -S   :  2          0.                                                 . 1.8 .4 Tƣ ̀ trƣơ ̀ ng dây quâ ́ n bu ̀ :                    