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Randomized modulation schemes are often employed in DC-DC converters to reduce the magnitude of discrete harmonics in the output spectrum. One of these schemes is Randomized Switching Frequency modulation (RSFM) that completely eliminates the discrete harmonics by randomizing its switching period (switching frequency) to follow a uniform distribution. In this paper, we investigate RSFM with its switching...
Multi-pulse converters are suitable for high power application with the merits of low switching frequency (f0) and perfect harmonic performance. But the less controllability and poor regulation has a restriction on its application. This paper proposed an AC-DC/DC-AC converter based on multi-pulse converter's structure which has the same perfect harmonic performance with a low switching frequency (3f...
Controlling of a specific harmonic by a switching converter with switching frequency lower than 1 kHz was originally implemented by two-level optimal pulse pattern with unsymmetrical switching angles, namely by OPUS-technique. That means, given a desired fundamental and one or more specific harmonics, the problem is to find the switching times (angles) that produce the fundamental while generating...
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