High Current Power Inverter With SG3525 for Spot Welding and Instant Soldering
Complete Circuit Diagram:
SG3525 High Frequency Inverter Circuit for spot welding and soldering
Project Overview:
Hi. Today I'll show you how to make a simple yet elegant Power Inverter for use in Instant Heating Soldering and spot welding. The circuit is very minimal and portable because it's powered by two series connected Lithium Ion batteries.
A high-frequency, high-current spot welder is a specialized welding machine designed for joining metal surfaces together at specific points through the application of intense heat generated by a high current passing through the metal. This process is commonly used in manufacturing for applications like assembling sheet metal components in the automotive industry.
Power Supply: The spot welder is equipped with a high-power electrical power supply that can deliver a high current at a high frequency. The power supply is a crucial component as it determines the intensity of the heat generated during the welding process.
Electrodes: The spot welder has two electrodes, usually made of copper or other highly conductive materials, that come into direct contact with the metal pieces to be welded. These electrodes are designed to concentrate the electrical current at the specific spot where the weld is desired.
Control System: The spot welder is equipped with a control system that manages the duration and intensity of the current passing through the electrodes. This control is crucial to achieving the desired weld quality and avoiding overheating.
High-Frequency Current: The high-frequency current is typically in the radio frequency (RF) range, commonly around 1000 Hz or more. The use of high frequency allows for faster and more efficient welding compared to traditional lower-frequency spot welding machines.
Resistance Heating: As the high current passes through the metal at the point of contact between the electrodes, resistance heating occurs. This intense heat causes the metal at the interface to melt and form a weld nugget. The duration of the current flow is carefully controlled to prevent excessive heating and ensure a proper weld.
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