Active power filter with soft switching

The paper describes used techniques, operation characteristics and develops information of the unconventional soft switched active power filter. The power part is based on progressive IGBT’s and high speed voltage and current sensors. The APF is connected in parallel to the AC input of the system, and corrects all loads directly from the AC main. Control unit is based on use of digital signal processor. Used conception brings the savings of electrical energy and better EMC properties in comparison with common kinds of APF. The active power filter can be used for suppression of line current harmonics at AC main.

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