Modeling of Common-Mode Voltage Source for Multilevel Inverter Topologies

Review, Comprehensive Analysis and Derivation of Analytical Power Loss Calculation Equations for Two- to Three-Level Midpoint Clamped Inverter Topologies with Hybrid Switch Configurations

“…In general, a higher blocking voltage results in increased switching loss (for a fixed current/voltage combination), which is due to the non-linear relation between the blocking voltage and switching energy (see Figure 3). This leads to a reduction in the efficiency of this topology for higher switching frequencies due the increased switching losses [29]. Because the overall goal generally is efficient converters, a lower switching frequency could be used to decrease the power losses.…”

“…For two reasons, the application of emerging wide-bandgap (WBG) semiconductors in this two-level topology is challenging. First, one prominent advantage when applying WBG power semiconductors is the allowable decrease in the size of passive devices through a higher switching frequency [29]. Moreover, a high blocking voltage requirement limits the applicability of these promising technologies, which generally still have lower breakdown voltages compared to their silicon counterparts (see Table 1).…”

“…However, in this article, only the losses of the active switching devices are studied, and therefore the problem of DC link imbalance is not discussed further. Without additional measures, DC link imbalance issues generally lead to larger required DC link capacitance [27,29], which increases this component's weight.…”

Optimization of Bidirectional Modular DC/DC Converter for Low and High Power Operation in Aircraft Applications

“…A common-mode circuit model was obtained as presented in [15] and adapted for DC/DC converters. Inductances LCMi and LCMout, as well as the capacitances CCMi and CCMout shown in Fig.…”

“…3, were found iteratively by comparing the currents calculated by the model with limits provided by EMI standards. Circuit parameters external to the converter are estimated by measurements in a real plant, or using FEM [15]. The inner parasitic elements can be estimated using a fixed mechanical structure, which is usually unfeasible in initial stages of the converter design.…”