| 摘要 |
The invention relates to a magnetic actuator comprising at least one coil ( 14 ) surrounded by a magnetic circuit ( 10 ), the magnetic circuit possessing: three legs ( 12.1, 12.2, 11 ), comprising two outer legs on either side of the coil ( 14 ) and an intermediate leg passing through the coil, these legs having no direct mechanical contact with one another; and two facing end plates ( 17, 18 ) magnetically interconnecting the three legs ( 12.1, 12.2, 11 ). The magnetic circuit comprises a moving armature ( 21 ) comprising at least one of the end plates ( 18 ), and a stationary portion ( 200 ) including a yoke ( 22 ) having at least the other one of the end plates ( 17 ) and at least one permanent magnet ( 13 ), the permanent magnet ( 13 ) being placed at one end of the intermediate leg ( 11 ) beside the end plate ( 17 ) of the yoke ( 22). The invention is applicable to controlling medium-voltage and high-voltage circuit breaker vacuum chambers.
|
