In simple terms, Welding refers to fabrication process that joins materials such as metals and thermoplastics. For welding different processes and energy sources are required like gas flame, electric arc, laser, electric beam, friction and ultra sound. Welding machines are classified into different categories based on welding process and equipment used during process. Some welding machines require transformers to convert high voltage, low current electricity into high current low voltage. This type of welding machine is least expensive.
Inverter based welding machines use high-power semiconductors like IGBT for handling high loads of arc welding. These machines convert electricity into high voltage and store them in a capacitor bank. The stored energy is transferred to secondary transformer for producing desired welding current.
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