ELECTROMAGNETIC DUAL-COIL VALVE ACTUATOR WITH PERMANENT MAGNET

摘要

The invention relates to an electromagnetic dual-coil valve actuator with a permanent magnet. The invention consists of an actuating element (11) which can move between two end positions under the effect of an elastic member and two electromagnets. Each of the aforementioned electromagnets is provided with a core comprising a first T-shaped core part (18) having a base (19) which is connected to a central branch (20) around which a coil (21) is disposed. The first core part (18) is placed inside a second U-shaped coil part (22) having a base (23) which is connected to outer branches (24) which extend parallel to the above-mentioned central branch (20) of the first core part (18). Moreover, a permanent magnet (25) is disposed between the base of the first coil part (18) and the base of the second core part (22). Furthermore, in at least one of the electromagnets, the base (19) of the first T-shaped core part (18) extends such as to form air gaps (e) with the outer branches (24) of the second core part (22), said air gaps being much smaller in size in relation to the distance between the base (19) of the first T-shaped core part and the base (23) of the second U-shaped core part.