A novel control method for enhanced performance of single‐phase matrix converters

Abstract

The conventional topology of direct single‐to‐single‐phase matrix converter (SSMC) is widely adopted in industrial and power system‐related applications owing to its desired features. Current control methods in the literature either limit the voltage transfer ratio (VTR) or prohibit their utilization to drive inductive (RL) loads. In this study, we propose a novel control method that overcomes these limitations by enabling the SSMC to achieve relatively high VTRs while driving RL loads with negligible output voltage spikes and without current commutation problems. Further, the proposed control method improves the overall performance by reducing output voltage and source input current total harmonic distortion (THD) and offering soft‐switching at the commutation instances. The rigidity of the proposed control method over the counterpart methods in the literature is verified through simulation and experimental case studies over a wide range of synthesized output frequencies and modulation indexes. A 530‐W laboratory prototype is built for the experimental study. Results demonstrated the ability of the proposed method in enabling the SSMC to drive an RL load without current commutation issues and with mitigated output voltage spikes while achieving relatively high VTRs and suppressing the output voltage and source input current THD.

Experimental comparison of operational amplifier and voltage sensor-based zero-crossing detector circuits for power electronic converters

“…They also got involved in frequency and phase angle measurement applications in [3,4]. ZCD circuits are usually built using optocouplers [5,11,19], operational amplifiers (op-amps) [19][20][21][22][23], or voltage sensors [6,10,24,25]. Optocoupler-based ZCD circuits provide the required level of isolation, however, they use diodes that lead to delayed ZCD due to the forward voltage drop.…”

Design and Experimental Verification of PUC Multilevel Inverter-Based PMSG Wind Energy Conversion System

“…Various studies have been conducted to propose different MLI topologies, including cascaded H-bridge (CHB), flying capacitor (FC), and neutral-point clamped (NPC) converters [18][19][20][21][22]. Among these traditional MLIs, the PUC-based MLI represents a promising structure, as it combines the advantages of both CHB and FC configurations [23,24]. Ounejjar proposed the PUC-based MLI for the first time in 2011 [25].…”