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Raytheon inverter welding machine circuit diagram
Published: 2020/1/11 18:20:38 Read: 273 molex connector

The welding rod and the welding piece are respectively connected to two output terminals of the power supply. When welding is started, the electrode and the welding piece are brought into contact. At this time, the power supply is short-circuited, and the current flowing through the contact is very large. In addition, the contact surface between the electrode and the welding piece is rough. In fact, there are only a few points of contact. Lift the electrode later to allow a certain gap between the electrode and the weldment.

Ordinary welding machine

An electric welding machine is a special transformer. The difference is that the voltage drop is small when the transformer is connected to the load, and the voltage drop is large when the welder is connected to the load. This is mainly achieved by adjusting the magnetic flux and the inductance of the series inductor. Although the circuit is closed, it is precisely because the circuit is closed that the current is equal everywhere in the closed circuit; but the resistance is different everywhere, especially the maximum resistance at the non-fixed contact. This resistance is physically Called contact resistance. According to the thermal effect law of electric current (also known as Joule's law),

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