Application method of energy storage spot welding machine

What is an example of an electrical spot-welder?

For example, IGBTs are particularly well-suited to take power from the AC power line and control the welding energy and pulse times. An electrical spot-welder is primarily used to join pieces of metal by applying calibrated pulses of current to make molten spots between the welded pieces.

How does a spot welder work?

Figure 1. A spot-welder requires two power stages, as shown in Figure 1. The first is a Power Factor Correction (PFC) rectifier to take power from the AC line of 208 to 250 VACrms at 50 or 60 Hz. The second is a switch to supply power at the desired pulse width and energy level to the weld output transformer.

What is affective spot-welding?

Efective spot-welding depends on the force applied to the work pieces during the current pulses and the total energy delivered into the weld spot by the machine’s tips. This application note outlines the many advantages of using discrete IGBTs as the switching elements in an electrical welding unit.

How does an electrical spot-welder work?

An electrical spot-welder is primarily used to join pieces of metal by applying calibrated pulses of current to make molten spots between the welded pieces. When these molten spots cool, the work pieces are bonded together.

How is welding pulse energy determined?

The welding pulse energy is determined by the number of current pulses that flow through the 32:1 stepdown transformer. The Bourns® transformer used in this solution example is constructed using a ferrite core that stores 0.8 joules in 40 μs for the maximum individual pulse energy.