New Three-Level Soft Turn-off T-type NPC Inverter

Penczek, Adam; Mondzik, Andrzej; Пирог, С.; Twarog, Mateusz; Stala, Robert

doi:10.1109/ee53374.2021.9628388

Cited by 5 publications

(3 citation statements)

References 16 publications

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“…In [22], the improvement of the operation of this converter via additional control functions was presented. This system was optimized by using a different, active resonant cell, as presented in [23]. In this system [23], no load current flows through the resonant choke, which reduces its volume.…”

Section: Introductionmentioning

confidence: 99%

“…This system was optimized by using a different, active resonant cell, as presented in [23]. In this system [23], no load current flows through the resonant choke, which reduces its volume. The concept of limiting switching losses by using active commutation circuits can also be found for two-level inverter systems, an example of which is the inverter presented in [24].…”

Section: Introductionmentioning

confidence: 99%

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T-NPC Soft-Commutated Inverter Based on Reverse Blocking IGBTs with the Novel Concept of a DESAT Control Circuit in the Gate Driver

Mondzik

2023

Energies

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This article presents the concept of switching and conduction loss reduction in a T-NPC inverter based on IGBT transistors. The method of limiting switching losses involves the connection of an LC circuit designed to cause transistors in vertical branches to shut down under zero voltage conditions. In order to reduce conduction losses, it was proposed to use two reverse blocking transistors connected anti-parallel in the horizontal branch of the inverter. To ensure safe operation of the transistors, a gate driver proposal for controlling the IGBT reverse blocking transistor is presented. The solution is characterized by a changed part of the driver, responsible for short-circuit protection. It eliminates excessive, destructive currents that can potentially flow through the driver circuit under the influence of the power supply voltage of the power circuit connected backwards to the controlled transistor. Examples of applications and benefits of the proposed solution are presented and verified with laboratory tests.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

T-NPC Soft-Commutated Inverter Based on Reverse Blocking IGBTs with the Novel Concept of a DESAT Control Circuit in the Gate Driver

Mondzik

2023

Energies

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“…Ref. [26] provides a new topology of softs‐witching TNPC that could improve the turn‐off process. Although this topology could realize the P‐O and O‐N soft‐switching, it need add two switches, four diodes, two resonant capacitors and inductors for each phase, which increases the cost significantly [27].…”

Section: Introductionmentioning

confidence: 99%

A zero‐current‐transition soft‐switching technique for T‐type NPC three‐level inverter

Yin

Yao

2022

IET Power Electronics

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Based on the commutation property of the T‐type neutral point clamped (T‐NPC) three‐level inverter, a novel zero‐current‐transition (ZCT) soft‐switching topology is proposed. The proposed topology employs only two auxiliary switches and one inductor and capacitor (LC) resonant tank on each phase leg. The commutation process of the soft‐switching technique is analyzed. The results show that all switches on main leg and auxiliary leg can achieve soft commutation without changing pulse width modulation (PWM) strategy. The control family of T‐NPC three‐level ZCT soft‐switching topology are analyzed respectively, and then the resonant tank and timing schemes of different modes are given. Using two auxiliary switches in resonance can produce greater resonance current due to the combination of external excitation sources, which is more conducive to realize the soft‐switching commutation of the main switch. At last, a half bridge prototype of T‐NPC three‐level inverter is built. The influence of equivalent internal resistance of power switches, diode reverse recovery and stray inductance for soft commutation is analyzed. The advantages of ZCT soft‐switching technology is verified.

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Frequency spectra based approach to analytical formulation and minimization of voltage THD in staircase modulated multilevel inverters

Barbie

Baimel

Kuperman

2022

Alexandria Engineering Journal

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New Three-Level Soft Turn-off T-type NPC Inverter

Cited by 5 publications

References 16 publications

T-NPC Soft-Commutated Inverter Based on Reverse Blocking IGBTs with the Novel Concept of a DESAT Control Circuit in the Gate Driver

T-NPC Soft-Commutated Inverter Based on Reverse Blocking IGBTs with the Novel Concept of a DESAT Control Circuit in the Gate Driver

A zero‐current‐transition soft‐switching technique for T‐type NPC three‐level inverter

Frequency spectra based approach to analytical formulation and minimization of voltage THD in staircase modulated multilevel inverters

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