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	1. Analysis and Design of Two-Stage 48V VRM Based on Real-Time Current Control for FSBB-LLC
	ZHANG Xiangjun,TANG Weiming,WEN Zhaoliang,GUAN Yueshi,WANG Yijie,Xu Dianguo
	Dynamic and Electronic Engineering 26 April 2023
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	Abstract:With the rapid development of information technology such as AI and cloud computing, the energy consumption of data centers continues to increase. This has led to a transition of the power supply bus voltage from 12V to 48V. The research on the new generation of 48V to 1V converter is of great significance for reducing energy consumption, reducing bus volume, and improving the power supply efficiency of CPUs and GPUs in data centers. In this context, this paper designs a two-stage 48V voltage regulation module that combines a four-switch buck-boost converter and an LLC converter for the 48V bus server architecture. A real-time current control method is proposed for the FSBB converter to achieve zero-voltage switching of switching tubes within the full load range, and smooth switching between boosting and bucking modes. Finally, a 200W experimental prototype was built.
	TO cite this article:ZHANG Xiangjun,TANG Weiming,WEN Zhaoliang, et al. Analysis and Design of Two-Stage 48V VRM Based on Real-Time Current Control for FSBB-LLC[OL].[26 April 2023] http://en.paper.edu.cn/en_releasepaper/content/4760557


	2. Model Predictive Control Strategy with Fixed Switching Frequency for Three Phase Four Leg Voltage Source Inverter
	HE Xiaoyong,YANG Wei
	Dynamic and Electronic Engineering 23 April 2023
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	Abstract:Three phase four leg voltage source inverter (3P4L VSI) has the ability to carry unbalance and nonlinear loads, which makes it suitable to operate as distributed generator under stand-alone circumstance. However, the added neutral leg at the same time increases the complexity of the control process so that the computation burden becomes inevitably heavier. Model predictive control strategy has been proven robust to control four leg inverters, to solve the existing drawback of variable switching frequency which leads to possible instability, as well as to decrease the controller computation burden, this paper has proposed a strategy combined an effective modulation state with an optimized model predictive control method based on the mathematic model of the inverter. The high performance with fixed switching frequency and higher computation efficiency of the proposed strategy is validated by both simulation and experimental results.
	TO cite this article:HE Xiaoyong,YANG Wei. Model Predictive Control Strategy with Fixed Switching Frequency for Three Phase Four Leg Voltage Source Inverter[OL].[23 April 2023] http://en.paper.edu.cn/en_releasepaper/content/4760516


	3. Analysis of electromagnetic characteristics of five-phase induction motor before and after phase loss
	LIU Yuwei,SUN Peng,WANG Jiguang,SHEN Guiyue,AI Mengmeng
	Dynamic and Electronic Engineering 01 November 2021
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	Abstract:Compared with the traditional three-phase induction motor, multiphase induction motor not only has the characteristics of high efficiency and high power density, but also has the advantages of small torque ripple and strong anti-interference. Therefore, it has been paid great attention in the application of electric ship propulsion, aircraft drive, locomotive traction and high-power industry. In this paper, a 15kw five-phase induction motor is taken as the research object. Based on Maxwell electromagnetic field theory, the two-dimensional electromagnetic transient field model of five-phase induction motor is established by using finite element simulation software, and solving the problem of the magnetic density, torque and electromagnetic loss of the motor under different working conditions.
	TO cite this article:LIU Yuwei,SUN Peng,WANG Jiguang, et al. Analysis of electromagnetic characteristics of five-phase induction motor before and after phase loss[OL].[ 1 November 2021] http://en.paper.edu.cn/en_releasepaper/content/4755668


	4. Study on the Resonant Instability of LCL-TYPE Photovoltaic Farms
	RAN Lize,WANG Jianze
	Dynamic and Electronic Engineering 01 June 2020
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	Abstract:For the grid side current fed LCL inverter based photovoltaic farms, the mechanism of high-frequency resonance is revealed in this paper: the photovoltaic power station is equal to the circuit in which the resistance is connected in series with the capacitor in a certain frequency region, and it will be possible to construct an equivalent RLC resonant circuit with inductive grid impedance to produce an unstable or weak damping circuit resonance, represented as a high frequency resonant component emerging in the grid side current of LCL inverter. In addition, this paper theoretically verifies the RLC equivalent circuit and analyzes its excitation conditions. Furtherly, the influence of the control function of the LCL inverter on the damping characteristics of the equivalent resonant circuit is analyzed. Finally, the correctness of the analysis is verified by simulation experiments.
	TO cite this article:RAN Lize,WANG Jianze. Study on the Resonant Instability of LCL-TYPE Photovoltaic Farms[OL].[ 1 June 2020] http://en.paper.edu.cn/en_releasepaper/content/4752227

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