Film capacitors in welding equipment

Electric welding equipment is a device that uses electrical energy to generate heat to weld metal parts together. In the past, welding power sources used large and bulky metal transformers. They operated at 50 or 60 Hz and were relatively inefficient. The development and widespread application of modern frequency conversion technology has changed the design and capabilities of modern welding equipment. This new welding equipment operates at a higher frequency, is more efficient, and can become more compact and lightweight through optimized design. Film capacitors are the main capacitors.

Please refer to the following figure for an application example of film capacitors in welding equipment:

TDK Electronics' film capacitor models suitable for welding equipment can be found in the figure below.

The characteristics of the DC link/DC filter CBUS film capacitors B32674…B32678D/G are as follows:

Performance characteristics:

• VR: 300 … 875 V DC
  

  
  

• CR: 0.47 … 100 μF

  
  

• High current series: higher rated current than B3277x

  
  

• Maximum operating temperature +105 °C

  
  

• Lead spacing 27.5 ... 52.5 mm

  
  

• 2 terminals or 4 terminals (provides better mechanical performance)

  
  

• Lead spacing 27.5 ... 52.5 mm