FPGA Implementation of Passivity-Based Control and Output Load Algebraic Estimation for Transformerless Multilevel Active Rectifier. - Jose Antonio Juarez-Abad; Arturo Pablo Sandoval-Garcia; Jesús Linares-Flores; José-Fermi Guerrero-Castellanos; Pedro Bañuelos Sánchez; Marco Antonio Contreras-Ordaz (IEEE Trans. Ind. Informatics, 2019)