Yizhan Jiang

Discontinuous Modulation Strategy for Z-Source Three-Level Inverters with Optimizable Switching Losses

Yizhan Jiang, Zhikang Guo, Qiang Wang, Bo Suk Yang et autres

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A current optimization model predictive control with common-mode voltage reduction for three-level T-type inverters

Zhikang Guo, Zhaoxun Li, Weifeng Zhang, Yizhan Jiang et autres

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Novel Discontinuous Modulation Strategy for Z-Source Inverters Using Equal Time Interval Shoot-Through State Insertion Method

Yizhan Jiang, Fengyou He

The conventional Z-source inverter shoot-through vector insertion method usually inserts a shoot-through vector between two different voltage vectors, which does not additionally increase the number of switching actions. However, the variation of the voltage vector dwell time will cause the fluctuation of …

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Generalized discontinuous PWM strategy for Z-source inverters with switch losses optimization

Yizhan Jiang, Qiang Wang, Fengyou He, Jingwei Zhang et autres

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Dual-Vector Model Predictive Control for Modular Multilevel Converter With Low Calculation Burden

Weifeng Zhang, Jingwei Zhang, Qiang Wang, Yizhan Jiang et autres

This paper proposes a novel dual-vector model predictive control (DV-MPC) method applied to modular multilevel converter(MMC). The traditional predictive control method generally aim to minimize the output current tracking error at the next sampling instant, while the proposed method minimizes the total …

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Using Redundant IGBT Device as a Temperature Sensor—Online Monitoring System of Thermal Parameters for NPC Three-Level Inverters

Qiang Wang, Yu Tian, Yizhan Jiang, Jingwei Zhang et autres

Neutral-point-clamped (NPC) three-level inverter has been widely used in the field of medium- and high-voltage power inverters, and the existence of redundant insulated gate bipolar transistor (IGBT) devices in specific topology brings the possibility of online monitoring for thermal reliability. First, a …

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Short-Circuit Fault Adaptive Analysis and Protection for SiC MOSFETs

Qiang Wang, Jingwei Zhang, Francesco Iannuzzo, Yizhan Jiang et autres

Aiming at the short-circuit (SC) capability for silicon carbide (SiC) MOSFETs due to the limitation of the gate oxide process, that is, the ability of MOSFET to withstand large current and high voltage when the channel is turned on, this article summarizes …

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Active Gate Drive for Short-Circuit Current Suppression of SiC MOSFET in Hard Switching Fault

Jingwei Zhang, Zhikang Guo, Yizhan Jiang, Guojun Tan

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A Common-Mode Voltage Reduction PWM Strategy for Three-Phase Quasi-Z-Source Inverter With Optimized Switching Losses

Yizhan Jiang, Jingwei Zhang, Qiang Wang, Fengyou He et autres

The application of the Z-source/quasi-Z-source inverter exacerbates the hazard of common mode voltage in motor drives or photovoltaic systems. The existing reduced common-mode voltage pulse width modulation (RCMV-PWM) technique applied to the Z-source/quasi-Z-source inverter has solved the problem of common mode voltage …

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Modulation Strategy of Z-source Inverter Based on Asymmetric Shoot-through Vector Insertion Method

Yizhan Jiang, Qiang Wang, Jingwei Zhang, Fengyou He et autres

The traditional Z-source inverter modulation strategy is usually symmetric. Symmetric modulation has a good effect in suppressing the second harmonic but also limits the possibility of modulation sequences. In this paper, an asymmetric modulation strategy is proposed, which uses the shoot-through vector …

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Improved Drain-source Voltage Detection Method for Short-circuit Protection of SiC MOSFET

Qiang Wang, Francesco Iannuzzo, Jingwei Zhang, Yizhan Jiang et autres

The importance of short-circuit protection in the driving scheme is self-evident, and the key is the realization of fast and accurate short-circuit fault detection. The traditional drain-source voltage$(V_{\text{ds}})$short-circuit detection method sacrifices the speed to ensure the reliability of short-circuit protection by setting …

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The Emergence and Propagation of Online Slang.

Zhewei Sun, Yizhan Jiang, Yang Xu

Slang is a common socio-linguistic phenomenon, but how slang emerges and propagates is poorly understood. We explorethis problem by analyzing longitudinal data from 1,000 Reddit communities over the past decade. We consider socialand linguistic factors pertaining to the emergence and propagation of …