AC/DC CAPACITORS FOR POWER ELECTRONICS

The scope of application for DC capacitors is similarly diverse:
Smoothing capacitors serve for the reduction of the AC component of fluctuating DC voltage, e.g., in power supplies in radio and television technology (transmitters,) high-voltage testing equipment, DC controllers, measurement and control technology, cascaded circuits for generation of high DC voltage a.m.o. Supporting capacitors, DC-Filter or buffer circuit capacitors are used for energy storage in intermediate DC circuits, e.g. in frequency converters for poly-phase drives, transistor and thyristor converters. They must be able to absorb and release very high currents within short periods, the peak value of the current being substantially greater than the rms value. Surge (Pulse) discharge capacitors are also capable of supplying or absorbing extreme short-time current surges. They are usually operated in discharge applications with non-reversing voltages, and at low repetition frequencies, e.g. in laser technology and lightning generators.