DC energilagringskondensatorkredsløb

What is a DC link capacitor?

The DC link capacitor also provides a low-impedance path for ripple currents generated by power switching circuits. Figure 1: In a switching power supply, the DC link capacitor is placed across the positive-to-negative rails after rectification (top).

What is a DC link circuit?

The Basics DC link (also called buss link) circuits are used primarily to balance the instantaneous power variations between the input source and the output load or a power circuit (Figure 1). In the example of a switching power supply, AC power is converted to DC without passing through a transformer, and fed to a high-frequency power oscillator.

What is condition monitoring of DC-link capacitors?

Condition monitoring (CM) of dc-link capacitors has great significance in enhancing the reliability of power converter systems. Over the past few years, many efforts have been made to realize CM of dc-link capacitors.

Which electrolytics are suitable for a DC link?

Cornell Dubilier Electronics has a series of suitable electrolytics that works well in many DC link applications. A good example is the low-ESR AFK Series, featuring a maximum ESR at 100 kHz and 20˚C that ranges from 1.350 Ω down to 0.033 Ω (Figure 2.)