A New SVPWM for the Phase Current Reconstruction of Three-Phase Three-level T-type Converters

• Published in: IEEE transactions on power electronics Vol. 31; no. 3; pp. 2627 - 2637
• Main Authors: Xiong Li, Dusmez, Serkan, Akin, Bilal, Rajashekara, Kaushik
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.03.2016; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Converters; Current measurement; Electric currents; Electric potential; Electrical equipment; Input output; Mathematical analysis; Out of order; Passive optical networks; Phase current; phase current reconstruction; Reconstruction; Sensors; Space vector pulse width modulation; SVPWM; Switches; Switching; Three-level T-type converters; Vectors (mathematics); Voltage; space vector pulsewidth modulation (SVPWM); three-level T-type converters (TLTTCs); Phase current reconstruction
• ISSN: 0885-8993; 1941-0107
• DOI: 10.1109/TPEL.2015.2440421

This paper presents a new space vector pulsewidth modulation scheme to reconstruct phase currents using neutral-point current sensing in three-level T-type converters (TLTTCs). For this purpose, zero vector and offset vectors are replaced with complementary active vectors. These active vectors do not affect the resultant output voltage and the voltage balance at the neutral point of TLTTCs. Hence, the pulsewidths of corresponding active vectors can be adjusted even at low speeds without much additional switching losses and low-frequency noise in the inverter. The modified switching patterns can easily be generated without significant computational complexity. The proposed method is experimentally verified using Texas Instruments TMS320F28335 and Spartan 6 controllers, on a custom designed T-type converter based on Fuji IGBT modules.