Electromagnet

Details Electromagnet Electromagnet

1981-11-30

1983-06-28

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

With magneto-mechanical motive device

335281, H01F 708

Patent

active

043908578

ABSTRACT:
An electromagnet is proposed which is intended in particular for controlling a fuel injection valve for internal combustion engines. The electromagnetic includes a flat armature and a magnetic winding applied to a shell core of ferromagnetic material. In order to minimize the spatial dimensions of the magnetic circuit and to improve the rapidity of operation of the electromagnet, the quotient A/l.sub.m, where A is the window surface area of the shell core and l.sub.m is the average winding length of the magnetic coil, is selected to be as small as possible. Furthermore, the magnetic circuit is embodied such that at the onset of the attracting movement of the flat armature, a magnetic induction B which is approximately 70% of the saturation induction prevails in the vicinity of the two axially acting air gaps, which have magnetic surface areas, A.sub.1, A.sub.2 of approximately equal size.

REFERENCES:
patent: 3472141 (1969-10-01), Hilbig et al.
patent: 3745496 (1973-07-01), Ticky

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