V.Magnetic Actuator μ→∞ a长 0 ←-Area A N]turns μ→∞ N2 turns Area A2→ 40 M .d5=H仪+a+片(a-x)=N4+Nh A=A=H=冷 h[a-刘+(a+2] =N,i +N2iz (Ni +Ni2)A H=A(a-x为)+a+x)A: 6.641,Electromagnetic Fields,Forces,and Motion Lecture 13 Prof.Markus Zahn Page 9 of 146.641, Electromagnetic Fields, Forces, and Motion Lecture 13 Prof. Markus Zahn Page 9 of 14 V. Magnetic Actuator 1 2 11 22 ( ) ( ) C H ds = H x a H a x = N i N i ++ − + ∫ i v 2 2 011 02 2 1 1 H A HA = HA H = A µ µ⇒ ( )( ) 2 2 11 22 1 A H a x a x =Ni Ni A ⎡ ⎤ ⎢ ⎥ −++ + ⎣ ⎦ ( ) ( )( ) 11 22 1 2 1 2 Ni Ni A H = A a x a xA + −++