Browsing by Author "Díaz, Matías"

Now showing items 1-8 of 8

    • A New Space-Vector-Modulation Algorithm for a Three-Level Four-Leg NPC Inverter 
      Rojas, Félix; Kennel, Ralph; Cárdenas Dobson, Jesús Roberto; Repenning, Ricardo; Clare, Jon C.; Díaz, Matías (IEEE, 2017)
      For power conversion systems interfaced to four-wire supplies, four-leg converters have become a standard solution. A four-leg converter allows good compensation of zero-sequence harmonics and full utilisation of the dc-link ...
    • A novel Capacitor Voltage Balancing strategy for Modular Multilevel Converters 
      Urrutia, Matías; Mora, Andrés; Angulo, Alejandro; Lezana, Pablo; Cárdenas Dobson, Roberto; Díaz, Matías (IEEE, 2018)
      This paper presents a simple and innovative Capacitor Voltage Balancing (CVB) strategy for Modular Multilevel Converters (MMC) based on full H-bridge cell topologies. The method computes specific modulation indexes for ...
    • An Enhanced dq-Based Vector Control System for Modular Multilevel Converters Feeding Variable-Speed Drives 
      Espinoza, Mauricio; Cárdenas Dobson, Jesús; Díaz, Matías; Clare, Jon C. (IEEE, 2017)
      Modular multilevel converters (M2C) are considered an attractive solution for high power drive applications. However, energy balancing within the converter is complex to achieve, particularly when the machine is operating ...
    • An overview of four-leg converters: topologies, modulations, control and applications 
      Rojas, Félix; Cárdenas Dobson, Jesús Roberto; Burgos Mellado, Claudio; Espina, Enrique; Pineda, Cristian; Díaz, Matías (IEEE, 2022)
      In three-phase unbalanced systems, where the circulation of zero sequence current is necessary, four-leg converters provide a neutral connection for single-phase or other unbalanced loads typically utilized in three-phase ...
    • Closed-loop adaptive high-starting torque scalar control scheme for induction motor variable speed drives 
      Travieso Torres, Juan Carlos; Duarte Mermoud, Manuel Armando; Díaz, Matías; Contreras Jara, Camilo; Hernández, Francisco (MDPI, 2022)
      This article proposes a closed-loop (CL) high-starting torque (HST) scalar control scheme (SCS) for induction motors (IM). It endows the recently proposed HST-SCS with high-output torque capability beyond starting after ...
    • Continuous set model predictive control for energy management of modular multilevel matrix converters 
      Urrutia, Matías; Cárdenas Dobson, Roberto; Clare, Jon; Díaz, Matías; Watson, Alan (IEEE-INST Electrical Electronics Engineers, 2022)
      The modular multilevel matrix converter (M3C) is an ac to ac power converter composed of 9 arms and is proposed for high power applications such as motor drive and wind energy conversion systems. Energy Control of the ...
    • Fast Convergence Delayed Signal Cancellation Method for Sequence Component Separation 
      Cárdenas Dobson, Jesús; Díaz, Matías; Rojas, Félix; Clare, Jon (IEEE, 2015)
      Delayed signal cancellation is one of the methods used to separate the negative- and positive-sequence components in unbalanced systems. In this letter, a DSC methodology with fast convergence time is proposed and it ...
    • MagAO Imaging of long-period Objects (MILO). I. A Benchmark M Dwarf Companion Exciting a Massive Planet ... 
      Rodigas, Timothy; Arriagada, Pamela; Faherty, Jackie; Anglada Escudé, Guillem; Kaib, Nathan; Butler, R. Paul; Shectman, Stephen; Weinberger, Alycia; Males, Jared; Morzinski, Katie; Close, Laird; Hinz, Philip; Crane, Jeffrey; Thompson, Ian; Teske, Johanna; Díaz, Matías; Minniti, Dante; López Morales, Mercedes; Adams, Adam; Boss, Alan (IOP, 2016)
      We present high-contrast Magellan adaptive optics images of HD 7449, a Sun-like star with one planet and a longterm radial velocity (RV) trend. We unambiguously detect the source of the long-term trend from 0.6–2.15 μmat ...