In this work, a new real-time Simulation method is designed for nonlinear control techniques applied to power converters. We propose two different implementations: in the first one (Single Hardware in The Loop: SHIL), both model and control laws are inserted in the same Digital Signal Processor (DSP), and in the second approach (Double Hardware in The Loop: DHIL), the equations are loaded in different embedded systems. With this methodology, linear and nonlinear control techniques can be designed and compared in a quick and cheap real-time realization of the proposed systems, ideal for both students and engineers who are interested in learning and validating converters performance. The methodology can be applied to buck, boost, buck-boost, flyback, SEPIC and 3-phase AC-DC boost converters showing that the new and high performance embedded systems can evaluate distinct nonlinear controllers. The approach is done using matlab-simulink over commodity Texas Instruments Digital Signal Processors (TI-DSPs). The main purpose is to demonstrate the feasibility of proposed real-time implementations without using expensive HIL systems such as Opal-RT and Typhoon-HL.

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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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