Welding transformer with his hands - the heart of welding in our hands

What you should know before going to work?

before a welding transformer, it is necessary to understand what it is and what characteristics it has.This is the basic element of virtually any welding apparatus electric power converter AC current in the welding current, which carries power function.From the transformer will depend on the weight of the device and the range of its technical possibilities.

Main specifications of the transformer to the welding machine: the rated voltage, rated frequency, power consumption, range of welding current, open circuit voltage current.Putting a homemade welding transformer, should take into account all of these characteristics.

How to make your own hands welding transformer?

In fact, a transformer - two coils of copper wire, which is wound on the iron core, so to start the production of the welding transformer windings to be.It consists of two coils having different number of turns.Each coil is wound two coils - primary and secondary.

Primary is connected to the power source, and the secondary coil by inducing a current lower voltage but more amperage.The winding of the welding transformer has its own characteristics: it has always done in the same direction, each layer of the winding insulation layer of insulation, tracing paper or cotton insulation.

Before wound welding transformer, should be to choose the right wire for windings.For the primary winding copper wire in a suitable glass cloth insulation.It is not necessary to use the winding wire in PVC, as it may melt, which would result in a short circuit.

If the transformer hums strongly, so do not have enough turns of the winding network and you need to add a certain amount.The secondary winding must be wound on the two sides of the core.You can use a wire cross section 20-25 mm2.When using aluminum cable should increase its section 1.5.

number of turns of windings is necessary to select a wire having a section, thereby obtaining the necessary power.The primary windings must be connected in parallel, and the secondary - consistently.

Features improvised devices

Homemade welding DC transformer has a mild arc ignition, the possibility of welding of sheet metal, the lack neprovarivaemyh areas.The fundamental difference from the AC transformer - inflated secondary voltage.

This is achieved by introducing into the secondary circuit of the diode bridge with a capacitor, whereby the output voltage is increased by 1.5 times.

welding machine of three-phase transformer can be made using a three-phase step-down transformer to 380 V, the power consumption of 2 kW.This unit is used for power supply or low voltage lighting.Suitable even transformer with a burned-winding.

Homemade transformer welding machines must be powerful enough.It is necessary that the primary winding is composed of 220 turns of copper wire insulated with glass cloth with a diameter of 2 mm, and the secondary - of 56 turns of copper wire cross-section of 60 mm2.