Rapid response solenoid for electromagnetic operated valve

摘要

A solenoid for an electromagnetically operated valve includes a bobbin having a substantially rectangular or elliptical cross section, a pole plate stationary with respect to the bobbin, and an armature slidable within the bobbin in response to a magnetic field generated by the coil through the pole plate. A coil wound around the bobbin has a rectangular cross section which on a short axis side includes a width W. A relation between width W and a virtual cylindrical iron core of diameter D having the same cross sectional area as an armature cross sectional area is expressed as D=(0.4 to 0.8) W. A ratio of a length A of a long axis side of the armature to a length B of a short axis side of the armature has a range between 3.1<=(A/B)<=4.5.