Open AccessModified modulation scheme for three‐level diode‐clamped matrix converter under unbalanced input conditions
Author(s) -
Su Mei,
Zhao Ziyi,
Dan Hanbing,
Peng Tao,
Sun Yao,
Che Ruyu,
Zhang Fan,
Zhu Qi,
Wheeler Patrick
Publication year - 2018
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2017.0512
Subject(s) - control theory (sociology) , transformer , harmonics , waveform , voltage , topology (electrical circuits) , modulation (music) , electronic engineering , computer science , engineering , physics , electrical engineering , acoustics , control (management) , artificial intelligence
The three‐level diode‐clamped matrix converter (TLDCMC) topology has outstanding performance under ideal operating conditions. However, input disturbance can influence the waveforms at the output side of the converter due to the direct coupling between the input and output. This study proposes a modified modulation scheme for TLDCMC during operation with unbalanced input voltages and when different transformer turns ratios are used for an isolation transformer at the input. With this modulation technique, sinusoidal and balanced output voltages are guaranteed and the input current harmonics are minimised. Experimental results are presented to demonstrate the feasibility and effectiveness of the proposed modulation scheme.