| 摘要 |
An electromagnetic actuator comprises an armature 10 with a permanent magnet 8 and two electric coils 14a, 14b on opposing sides of the armature 10. Each of the coils 14a, 14b has an axis which is substantially aligned with each other and the direction of movement of the armature 10. The actuator includes a magnetic flux container 2 which surrounds the armature 10 and coils 14a, 14b. The container 2 contains the magnetic fields generated by the actuator whilst shielding it from external magnetic fields. The actuator is arranged to have at least two stable armature positions. The actuator may further include resilient devices such as springs and shaped pole pieces which are arranged to optimise the energy used by the actuator. The actuator may provide a robust, reliable and energy efficient actuator for a broad range of applications such as fluid flow control. |
