Welding transformer - lightweight. Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Welding transformer - lightweight. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / welding equipment

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For a hundred years everyone has been thinking about how to reduce the weight of a welding transformer. And I decided to try to reduce at least one and a half times: from 28 kg (the lightest household, not counting electronic ones) to 18, for example.

There used to be transformers with a choke in the secondary circuit. Let's rearrange it into the primary and begin to reduce the turns in the primary winding. Soon we will reach the saturation of iron, and - a short circuit. And we will turn it into a long one, because we have a choke in the primary circuit. We will bring the idling current to 0.3, or even to 0.5 of the nominal value. Then the losses in the wires will be 0.09 or even 0.25 of the losses in the operating mode. Not shiny, but tolerable. The open circuit voltage is 22-26V, we connect both windings in parallel, however, the voltage is not enough for welding, even if the windings are connected in series. I had to make an exciter to give an impulse of 3-7 kV exactly at the right moment.

And my transformer already decently cooks with a deuce, and a triple, and a five. From a household outlet, and does not knock out! With series secondary windings - even without exciter. And it only weighs 6 kg!

Author: A. Budyonny

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