What is a Constant Current Power Source in Welding?

A constant current power source is an arc welding power source with a volt-ampere output characteristic that produces a small welding current change from a large arc voltage change. This type of power source is often used for welding thin metals because it provides good control over the weld pool and can help prevent burn-throughs. It can also be used for other applications where a precise current is desired, such as soldering.

How Does a Constant Current Power Source Work?

A constant current power source produces a constant welding current, regardless of the arc voltage. This is accomplished by using a transformer to regulate the welding current. The transformer is designed so that a small change in arc voltage results in a large change in secondary current. This means that the welding current will remain constant even if the arc voltage fluctuates.

What are the advantages of using a constant voltage power source?

There are several advantages to using a constant current power source for welding:

First, it provides good control over the weld pool.
Second, it can help prevent burn-throughs, because the welding current is less likely to increase if the arc voltage increases.
Third, it can be used for other applications where a precise current is desired, such as soldering.
Fourth, it is less likely to cause weld defects, because the welding current is more constant. fifth, it can be used with a wider range of electrode types.

Disadvantages of Using a Constant Current Power Source

There are also some disadvantages to using a constant current power source:

First, it is not well suited for welding thick metals, because the welding current will not increase as the arc voltage increases.
Second, it may not be able to produce as high of a welding current as a constant voltage power source.
Third, it may be more expensive than a constant voltage power source.
Fourth, it may be more difficult to use than a constant voltage power source.

What is constant current and constant voltage in welding?

Constant current (CC) and constant voltage (CV) are two types of arc welding power sources. CC power sources maintain a constant welding current, regardless of the arc voltage.