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IDF-Correction-Based PWM Algorithm for a Three-Phase AC–DC Buck Converter

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2 Author(s)
Milanovic̆, M. ; Fac. of Electr. Eng. & Comput. Sci., Univ. of Maribor, Maribor, Slovenia ; Šlibar, P.

This paper presents a pulsewidth modulation (PWM) algorithm for a three-phase ac-dc rectifier, where the third and fifth harmonics are indicated in the input phase voltages. A mathematical analysis, which includes this voltage harmonic's components, shows that the unity input displacement factor (IDF) can be reached by appropriate evaluation of duty-cycle functions. A PWM algorithm is proposed based on this developed theoretical achievement. This approach enables current sensorless unity IDF rectification. The PWM algorithm is investigated theoretically and verified by simulations and experiment.

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Industrial Electronics, IEEE Transactions on  (Volume:58 ,  Issue: 8 )