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In this paper the consensus problem for continuous time multi-agent systems in the presence of time-delay is addressed. A novel sufficient condition for the case of nonuniform non-differentiable time-varying delays with minimum value greater than zero and a method to compute an estimate of the convergence rate are given. Simulation examples are given to show the performance of the proposed method.

This work presents a comparison of power losses of three 3-phase converter topologies commonly used in UPS (Uninterruptible Power Supply) applications at rectifier and inverter operation, within a range of switching frequencies, for loads with various power factors. This study also encompasses the losses evaluation in passive elements and cooling requirements for each topology, usually neglected in previous works. The competitiveness of silicon carbide (SiC) commercial modules in 3-phase online UPSs is also addressed. A simulation model to estimate the semiconductor losses and junction temperatures is explained. Preliminary experimental results prove the effectiveness of the proposed methodology for converter losses estimation.

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