How do welding transformers work?

Welding transformers apply to the contact and arc elektroyosvarka. The short circuit of secondary winding of the transformer is the noryomalny operating mode at contact welding (at contact of elektyorod) and often arises at arc.

Схема устройства сварочного трансформатора

Scheme of the device of the welding transformer.

For restriction of currents of KZ welding transformers build with the big induced resistance and rather low power factor. Increase in induced resistance the obmoyotok of the welding transformer can be reached by either application of the speyotsialny design of windings, or inclusion of additional inductance in the chain secondary (or primary) the winding. Increase in induced resistances of windings in the transformer is reached by increase in flows the rasseyayoniya for what transformer winding places on different rods of the magnetic conductor or in different places on rod height.

Схемы устройства и принцип работы сварочных трансформаторов

Figure 1. Schemes of the device and principle of operation of welding transformers.

Turning on of magnetic shunts in the magnetic conductor (fig. 1a) the rasseyayoniya and induced resistance of transformer winding also sharply increases flows. Transformers for contact welding do with the secondary winding consisting of one round on which tension usually does not exceed 14 Century. For regulation of the current proceeding through the welded part, primary winding of the welding transyoformator has several conclusions which switching allows to change number of rounds of the winding.

Now the welding transformers intended for arc electric welding have the widest circulation.

Such transforyomator build on the secondary voltage of 60-70 V (tension of ignition of the arch).

Feature of operation of these transformers is the intermittent duty of work with abrupt junctions from no-load operation to the short circuit, and back. Minor changes of current and considerable inductance in welding chains are necessary for steady and continuous burning of the arch.

For regulation of current in the welding chain consistently with secondary winding of the transformer vklyuyochat the inductive coil with the steel magnetic conductor (fig. 1b). Velichiyona of the welding current depends on diameter of the electrode and is regulated by the condensance of the inductive coil which depends on the size of air gap And. Increase in air gap in the magnetic conductor of the inductive coil causes reduction of its condensance owing to what current in the svayorochny chain raises. Sometimes inductive coils combine in the single whole with the welding transformer.

COMMENTS

Muhammad Taimour Afzal: Physics is all about building concepts. i learned a lot more here as compared to what i learned in my class sitting for like 40 mins or so . so thanks for uploading this video.. keep it up. best wishes

Electrical Solution: Hi I am a your follower. I want to make 3D animation video like you. Please help me by giving a proper link to make such video like you. Thank you

ali batebi: if step up transformer causing lower current how the device(electric motor) works with the lower current

Md Zameer: First tell me one thing how did the current flows in second coil when u are giving a dc source 😁😁😂

pappu sahani: electrical power 1 and 2 as a thermal power plants how makes electricity & how the transfer of the electricity one state to another state what is the principals

Gaurav Gupta: how it is possible to the change flux if the transformer is stationary and the given active source is DC in primary?????/

BurningEvents: inductor opposes AC through it. then how does the the transformers work.? as the both coils are inductor.

Music Lovers: nice video...but it seems to be a little girl is reading the stuff!! so please improve the audio part!!

TheWertyu2007: is there resistance on the shunt ? or does it take a lot of force to move it inside the magnetic fields - can you feel a pull ?

Andrew Fordham: a little late on the scene, but I did always wander how my old buzz box really worked, and why it always conked out on me in the middle of a job. I did however upgrade to an inverter machine which is so much smoother than the old transformer. i do miss it though, I did keep hold of blue (my affectionate name for the transformer) with the hope of making a spot welder, but in the end I donated it to a friend who wanted to "get into" welding. I must say that although your knowledge of electronics far outweighs mine, I don't feel as confused as I thought I was after watching. thanks for explaining this machine and I hope you managed to build an AC/DC gtaw in the end.

Bruce W McLaughlin: I thought this was going to be an easy peasy talk on how it works but you lost me with the multisylable words at 7:01. So how does it work? Simple explanation would be nice .

Boonedock Journeyman: Brilliant. Good science and cleverness. Spend much time in a factory? Say as a Millwright or Electrician? I feel like I know you. Writing in 2018, this style was really fun. There is value in that.
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