Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title Dead-Time Implementation Method for CHB Inverter Cells
Authors Kyung-Seo Kim
DOI 10.6113/TKPE.2021.26.1.59
Page pp.59-65
ISSN 1229-2214
Keywords PCHB (Cascaded H-Bridge); Multi level inverter; Dead-time
Abstract This study proposes a dead-time implementation method suitable for cell voltage control of a cascaded H-bridge (CHB) inverter. The PWM module of an existing microcontroller cannot generate a maximum voltage due to the dead-time effect when used as the cell controller of the CHB inverter. In the proposed method, the operation method of the PWM module was changed without using the dead time module included in the existing microcontroller, so that the cell output voltage can be increased to the maximum voltage without voltage discontinuity. During the maximum voltage generation period, the full turn-on state can be maintained without unnecessary switching. The validity of the proposed method is confirmed through an experiment.