A Three-Phase Dual-Output T-Type Three-Level Converter

Wang, Rutian; Yuan, Shuai; Liu, Chuang; Guo, Dongbo; Shao, Xinming

doi:10.1109/tpel.2022.3153073

Cited by 10 publications

(7 citation statements)

References 26 publications

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“…According to the conclusion derived in Part III above, the relationship between the amplitude of the AC output line voltage uac and the DC input voltage udc can be described by (12) when the current of the converter in operating mode 2 is continuous.…”

Section: Boost Ratiomentioning

confidence: 97%

“…Although the number of switches decreases dramatically, the output phase voltage of NSC has only two levels [11]. Compared to three-level voltage, the harmonics and dv/dt of two-level voltage are high, which limits the improvement of waveform quality and the reduction of passive filters size [12]. T-type three-level converter plays an appropriate role in DC/AC power conversion of hybrid converter, due to less switches and shorter conduction paths than the neutral-point-clamped three-level converter (NPC-TLC).…”

Section: Introductionmentioning

confidence: 99%

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Three-Phase Hybrid Converter With Simultaneous DC and AC Outputs

Wang

2023

IEEE Access

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A novel topology of three-phase hybrid converter (TP-HC) which can supply simultaneously both DC and AC loads is presented. This topology is obtained by adding three switches to T-type three-level inverter. Consequently, this converter can achieve one group of DC/DC power transformation and another three-phase three-level AC voltage outputs with adjustable amplitude. The topology and operation modes of the proposed hybrid converter are introduced. Then the working principle and the available switching states of converter are analyzed, including current path, output phase voltage level and blocking voltage of different switching states. The characteristics of three typical hybrid converters are compared. A strategy combining time-sharing modulation and virtual space vector modulation (VSVPWM) is adopted to realize simultaneous DC and AC outputs of the converter. Then the capacitance voltage balance of the DC link is realized. In order to simplify the modulation strategy, a carrier based on pulse width modulation (CBPWM)strategy is proposed. Then, boost ratio of this converter is analyzed in detail. Finally, the feasibility of the proposed topology and the effectiveness of modulation strategy are verified by simulation and experiment.

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Section: Boost Ratiomentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Three-Phase Hybrid Converter With Simultaneous DC and AC Outputs

Wang

2023

IEEE Access

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“…network on the DC link. The additional switches are used to develop a 3-level waveform that provides a reduced dv/dt and better control on the boost inductor current, resulting in improved electromagnetic interference (EMI) and total harmonic distortion (THD) performances of the PFC stage [91]. A 97.3% efficient SiC based 10 kW three-phase T-type PFC is developed in [92].…”

Section: L Npc and 3l Anpc Pfc Convertersmentioning

confidence: 99%

On-Board Chargers for High-Voltage Electric Vehicle Powertrains: Future Trends and Challenges

Pradhan

Keshmiri

Emadi

2023

IEEE Open J. Power Electron.

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The powertrain voltages in battery electric vehicles (BEVs) have witnessed an upward trend due to advantages such as reduced runtime losses and extremely high DC fast charging power levels; aiding in reduced range anxiety and lower battery charging duration. This trend requires original equipment manufacturers (OEMs) to re-assess the design of electronic sub-assemblies (ESAs). Due to newly released DC fast charging standards, there are implications on the on-board charger (OBC), which is one of the ESAs in a BEV. This paper performs a comprehensive review of identifying system-level and use-case related challenges in transitioning on-board chargers to higher voltages compared to state-of-the-art, while considering the impact of newly introduced DC fast charging standards like Megawatt Charging Systems (MCS) and ChaoJi/ CHAdeMO 3.0. The existing research in academia and proof-of-concept designs compatible for high-voltage on-board charging sub-systems, such as the power factor correction (PFC) and isolated DC-DC conversion stages is consolidated. Due to the demand for integration driven by costoptimization targets, single-stage, traction-integrated, and auxiliary power unit (APU) integrated on-board chargers are discussed. Finally, the disparity between state-of-the-art technology and future requirements is defined to establish challenges and the direction of future research areas.

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“…Although there are extensive studies and evaluations of the multiport NSI in the literature, its MV utilization has been investigated using the cascaded connection of half-bridge circuits, in which high capacitance requirement is the main demerit since single-phase currents will flow in these half-bridges. On the other hand, an extended version of the NSI has been presented in [30] utilizing a T-type module instead of the middle switch, which is called dual-output T-type converter (DO-TC). Over and above that, another extended version of the prior mentioned DO-TC has been proposed in [31] utilizing NPC modules, which is called dual-output neutral-point clamped converter (DO-NPCC).…”

Section: Multiport Hybrid Converter For Electrifiedmentioning

confidence: 99%

Multiport Hybrid Converter for Electrified Transportation Systems

Abdelhakim¹,

Soeiro

Stecca

et al. 2023

IEEE Trans. Ind. Electron.

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Compact and efficient power converter solutions are seen to be the backbone of future transportation systems in order to cope with the ongoing transition toward greener systems. Such systems usually comprise a main load section, in which one or more propulsion or traction motors are connected, in addition to an auxiliary load, which might comprise the hotels and air conditioning for example. This auxiliary load can be as low as 5-10% of the main load power. Therefore, it can be challenging to drive this power from a typical high-power system that employs a medium-voltage (MV) dc (MVDC) grid, which is typical in high-power systems. In such MVDC-integrated systems, neutral-point-clamped and active neutral-pointclamped (ANPC) converters are commonly used, where the auxiliary load converter is overrated in this case, resulting in a bulky and inefficient power system. Thus, in order to enable a lighter and efficient transportation power system, a multiport hybrid converter (MHC) is presented in this article. This converter can feed the main MV motor, in addition to two auxiliary low-voltage loads. Compared with the state-of-the-art ANPC converter, the proposed MHC utilizes only two extra switches per phase leg in order to achieve this multiport operation along with increasing the voltage rating of another two switches. The proposed MHC is analyzed in this article, where its operation, modulation, and mathematical derivation are presented. These analyses are supported by simulation and experimental results utilizing a reduced-scale 5-kW system.

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A Three-Phase Dual-Output T-Type Three-Level Converter

Cited by 10 publications

References 26 publications

Three-Phase Hybrid Converter With Simultaneous DC and AC Outputs

Three-Phase Hybrid Converter With Simultaneous DC and AC Outputs

On-Board Chargers for High-Voltage Electric Vehicle Powertrains: Future Trends and Challenges

Multiport Hybrid Converter for Electrified Transportation Systems

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