VALVE DRIVING ELECTROMAGNET OF DC VOLTAGE Russian patent published in 2017 - IPC H01F7/08 

FIELD: electricity.

SUBSTANCE: valve drive electromagnet contains a ferromagnetic cylindrical core, a L-shaped bracket on which the core is mounted, a circular pole piece, a rotary armature associated with the mechanism driven, and a frame coil with a wound insulated copper wire comprising a winding, mounted on the core. The axis of symmetry of the pole piece and the axis of the core coincide and are removed from the inner, parallel to the axis of the wall of the L-shaped bracket by a distance c. The anchor is movable at actuation of the electromagnet by a distance equal to the working air gap from the working end face of the pole piece along its axis of symmetry, characterized in that the core diameter is made in accordance with the expression , where δ - the magnitude of the working air gap of the electromagnet, selected within 2 mm ≤ δ ≤ 12 mm, z₁=0.3198-2.236; z₂=0.1595P_mx-2.392; where P_mx - the given effort of counteraction of the mechanism driven in, within 5 H ≤ P_mx ≤ 25 H; z₃=8K_max-12.4_, where K_max is the specified multiplicity of the maximum voltage of the power supply with respect to the electromagnet actuation voltage, which is set within 1.35≤ K_max≤1.75, z₄=1.064n_p-2.66, where n_p is the overload factor specified within 1≤n_p≤4 by power, z₅=8K_s-4, where K_s is the coefficient of filling of the winding window, set within 0.3≤K_s≤0.7.

EFFECT: providing a minimum sufficient mounting area for a DC-driven valve drive magnet.

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