Al-free active diode laser emitting near 970 nm wavelength has been optimized for high electricalto-optical power conversion efficiency. There are numerous key contributors such as scattering and absorption losses, band alignment, Joule heating, carrier leakage and below-threshold losses that contribute to power loss mechanisms. We report on improvement from 50% to a record high 70% power conve...

In this paper, a global study in terms of control architecture and power management is applied to parallel inverters topology. High bandwidth controllers and low voltage THD are achieved. The losses through the structure are modeled by equivalent voltage sources which implicitly represent all the losses types in the system. An accurate online estimation method allows determining these losses pa...

Paper presents research of local losses and temperature rise in transformer steel tank. First experimental method based on initial rate is presented. This a direct for determining distribution structural parts. Technique relies the fact that after body has settled at steady state internal heat source suddenly removed or applied, change any point proportional to input (loss density) point. To te...