Capacitor solar container welding machine charging circuit

What is a capacitor discharge welder?

A Capacitive Discharge Welder, also known as CD Welder, is a type of welding machine that utilizes a high-voltage capacitor to discharge a short pulse of electrical energy into the weld zone. This process allows for precise and efficient spot welding of various materials, including metals like steel, aluminum, and copper.

What are the components of a capacitive discharge welder?

1. Capacitor Bank: The capacitor bank is the main component of a capacitive discharge welder. It consists of multiple capacitors connected in parallel to store and discharge electrical energy. The capacitance value and voltage rating of the capacitors determine the energy storage capacity of the capacitor bank.

What are the components of an energy storage capacitor?

Another important component in the schematic diagram is the charging circuit. This circuit is responsible for charging the energy storage capacitor to the desired voltage. It typically consists of a power supply, voltage regulator, and charging resistor.

How many capacitor banks can be used for CD welding?

KAPKON Conventionally, a single capacitor bank is used for CD-welding. KAPKON offers this as a single-pulse technology (SP). KAPKON is the only manufacturer on the market to have further developed the capacitor technology that up to four independent capacitor banks can be used for welding.

Can a spot welder use a Nichicon capacitor?

Currently this spot welder uses automotive grade Nichicon capacitors. It would be a good idea to check the feasibility of using cheaper capacitors, and test if it's better to use higher voltage ratings, or higher capacity. I managed to capture oscilloscope image of the pulse with an old analog Philips PM3226 oscilloscope.

Does a spot welder need a microcontroller?

This spot welder, unlike many available DIY projects, doesn't need a microcontroller to work: the welding pulse is triggered using relay module and a timing capacitor. Welding current is switched with an old recycled industrial thyristor module. Pulse energy can be adjusted with a potentiometer, which changes the voltage of capacitor bank.