Calculation of the inductor of the make-up current source for semi-automatic welding. Scheme, description

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Electric welding. Calculation of the inductor of the make-up current source for semi-automatic welding. Encyclopedia of radio electronics and electrical engineering

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Choke winding should be designed for the maximum make-up current I = 29 A. As for the transformer, we will take the coefficient of filling the window with copper K_о = 0,33 and current density in the inductor winding J = 8 A/mm2.

Let's choose:

value of maximum induction B_m = 1,42 T;
core fill factor K_c = 0,95.

Define overall size S_cS_o throttle core:

Let's choose a standard Ш-shaped tape core ШЛ25х32, having:

section S_c = 8 cm2;
window area S_o = 16 cm2;
overall dimension S_cS_o = 128 cm4.

Define number of throttle turns:

Will find the size of the non-magnetic gap:

Let's round up thickness of the non-magnetic gasket up to 4 mm (2x2 mm).

Choke winding:

or copper bar with section S_pd = 29/8 = 3,625 mm2;
or round enameled wire with a diameter of 2,1 mm.

Check resulting choke inductance:

Author: Koryakin-Chernyak S.L.

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