The power electronics is the branch of electrotechnique with the objective to study the static conversion
of electrical energy.
The power electronics handles, processes and modifies the electrical energy in static mode, therefore permitting:
– a more flexible and appropriate usage of electrical energy
– a considerable enhancement of handling, transportation and distribution of electrical energy
with a view to energy saving.
The power electronics is the technology associated with conversion, control and efficient modification
of the electrical power starting from the available input to transform it into the desired output.
AC and DC power electronics applications capacitors (intended for various AD-DC applications where high current and frequency are required).
These capacitors are intended for various AC and DC applications where high currents and frequencies are required.
The most important applicance of capacitors in the power electronics are filtering, protection, commutation,
energy storage, resonant circuits and many others.
For the application “filtering in alternated” the capacitor is excited with a fundamental current that is u
ually at 50 or 60 Hz. Besides the fundamental, there are one or more harmonics that generate high currents.
The values of these currents must be known and must not exceed the maximum values declared in the r
Typical application of these capacitors is in filters at the output of uninterruptible power supplies (UPS)
where there are several harmonics.
For the application “filtering in direct” the capacitor is excited by two voltages. One is the direct current
that can arrive up to 10000 Vdc and the other is the alternated current (ripple voltage) but the frequencies
can be in the region of kHz .
The very high frequency and the high values of the capacitances, up to thousands of μF, generate currents,
that can also be hundreds of ampères.
In protection circuits
These are used to build RC circuits in parallel to semi-conductors to protect them from overvoltages.
In this application, the capacitors are submitted to very high, but short lasting, current peaks.
|Tensione nominale RMS (Urms)|
Rated RMS voltage (Urms)
|230, 330, 450, 500|
| Tensione AC nominale (UN)|
Rated AC voltage (UN)
|352, 465, 630, 700|
| Frequenza nominale|
|Dispositivo di sicurezza|
| Categoria climatica|
|Temperatura massima d’esercizio -Ѳmax|
Maximum operating temperature -Ѳmax
|Temperatura minima d’esercizio -Ѳmin |
Minimum operating temperature -Ѳmin
|Temperatura massima punto più caldo -Ѳh |
Maximum hotspot temperature -Ѳhs
|Temperatura di stoccaggio|
|Tensione di prova|
|tra i terminali: 1,5UN
verso massa: 3,6kV/3”
between terminals: 1,5UNDC/30”
between terminals and case: 3,6kV/3”
| Coppia massima serraggio terminali|
Fixing screws maximum torque
|Corrente massima terminali|
Maximum terminal current
| Grado di protezione|
|Norma di riferimento Reference standard ||IEC 61071|
|Aspettativa di vita |
| Umidità relativa|
|≤2000 mslm masl|