根据上面两个条件有: CΣTmnh)o=(∑rnha Ccw Sk Ck CW=( ccW Ck ch CcW k=1 k=1CCW S k Ck Tk n k CW S k Ck Tk n k I i V I i ( V ln ) ( ln ) 2 1 1 2 1 =1 =  =  CCW S k Ck n k CW S k Ck n k I i I i ( ln ) ( ln ) 2 1 1 2 1 =1 =  =  根据上面两个条件有： CCW Sk Ck n k CW Sk Ck n k I i I i ( ) ( ) 2 1 1 2 1 =1 =  = 