Harmonic Currents of Semiconductor Pulse Switching Converters

Abstract

Due to the operation of power semiconductor switching converters, the content of harmonic currents, which these switching converters take from the feed array, is still increasing. One of the possible ways of minimizing these currents is the use of pulse switching converters. On one hand, the original, characteristic harmonic ones are minimized, but, on the other hand, new frequencies caused by the modulation frequency appear in the current spectrum. The level of the currents of these frequencies is small and is scarcely dependent on the load of the converter. It may happen that the proportional value of the monitored harmonic one is high, although the absolute value is low. In the article presented, there is a description of the activity of the pulse voltage rectifier and an analysis of the current taken. The other part contains the results of the harmonic analysis of the stated current, including both the absolute and proportional values according to the load. In the conclusion, there are results of measurements of pulsed switching converters taken from the real measurement.

The development of a modern heat treatment unit with embedded control ensuring minimal retroactive effects on the supply network

“…There is radio frequency interference when using phase power control because of the fast change [2], [3], [4], [5]. The principle of the phase control is widely known and it is shown in the Fig.…”

A Study of Interpolation Compensation Based Large Step Simulation of PWM Converters

“…When a fixed step is adopted to simulate the transient electromagnetic state, the switch action is responded only at the time of integral steps and therefore delayed, leading to a large number of non-characteristic harmonic waves [11][12][13]. Besides, switch action may also result in non-original numerical oscillation, which can generally be solved by an appropriate numerical integral method.…”