A Medium Voltage Input Multiport Isolated Output DC Transformer With Power Self-Balancing and Output Fault Isolation

A Review of Tunable Inductors for Power Electronics: Techniques and Applications

“…The inductance for this design as a function of air-gap length is given in (8), considering that this is the only variable. When substituting l g = 0, the inductance expression given in (8) simplifies to (9), which is referred to as the maximum inductance and is denoted by L max ; in contrast, the formula reduces to (10) when substituting l g =l c , and this is referred to as the minimum inductance and is represented by L min . Based on the equation given in (8), the variation of inductance with air gap length is plotted in Fig.…”

“…These losses typically comprise of copper losses that take place in the copper wire winding as well as iron losses that are being dissipated in the iron core and are mainly caused by eddy currents, the hysteresis of the magnetization curve, and residual magnetism [6][7][8]. According to power loss analysis in [9], [10], [11], [12], and [13], the most dissipated power in these proposed power electronic converters occurs in magnetic components, whether transformers or inductors, rather than other losses such as conduction and switching losses of the power semiconductor devices. The proposed converters in [7] and [14] have only one inductor and one transformer respectively, at the same time, these topologies include many other power semiconductor switches.…”

“…Taking into consideration the small number of magnetic components in these two converters as compared to other components and looking into power loss analysis in both cases, it can be noted that losses that occur in magnetic components are significant, although not dominant. Without losing generality, it can be stated that reducing magnetic component losses will contribute greatly to the converter's efficiency regardless of whether these losses occurring in the magnetic components are dominant as stated in [9][10][11][12][13] or not, as stated in [7] and [14], because even in the case that they are not dominant, they are still significant.…”

Voltage Controlled Magnetic Components for Power Electronics

“…Nonetheless, they remain amongst the bulkiest parts and account for a significant share of the losses [2,3].…”