Eddy Current Impedance Plane
The eddy current impedance plane is a special frequency-domain setting in the weld that affects the behavior of the electromagnetic field. It optimizes energy distribution and reduces radiation vibration.
Physical-chemical mechanism of action
The eddy current impedance level controls the frequency of the alternating current flowing through the welding tube conductor. This setting affects the inductance and capacitance of the system, which in turn changes the phase shift between voltage and current.
Metallurgical relevance & risks in welding
An incorrect setting of the eddy current impedance level can cause increased noise in the electromagnetic field, affecting the accuracy of the weld. Furthermore, it can lead to uneven heat distribution and thus irregular microstructures and stresses in the weld, posing risks of cracks and failures.
Workshop practice & instructions
To set the eddy current impedance level correctly, you first need to determine the desired frequency range. This depends on the type of welding tube conductor and the material used. The control is done via a variator on the welding machine. A typical frequency value is 50 Hz, but this can vary by application. It is important to continuously monitor the setting and adjust it based on the actual weld.