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关键词： 风力机叶片   疲劳试验   PMSM   旋转离心式加载   滑模控制   直接转矩控制  

摘要： 对现有总长为7.5 m的试验叶片（型号：KH30KW）进行分析，将系统简化为两自由度模型，建立动力学方程。通过三相永磁同步电动机（PMSM）带动偏心质量块作圆周旋转运动产生离心力，由变频器进行变频调速控制，对叶片进行激振加载。在传统滑模控制（SMC）里，存在着逆变器开关频率并非恒定、磁链与转矩脉动偏大、低速状况下系统难以精准控制以及因转矩脉动而产生高频噪声等一系列难题，为此，提出使用基于滑模控制的直接转矩控制（DTC-SMC），通过MATLAB建模，设计基于改进滑模的控制的三相PMSM矢量控制系统，搭建MATLAB仿真模型并给出仿真结果。

关键词： Dc-dc power converters   lifetime estimation   solar energy   solar energy   solar panels   solar panels   wind turbines   wind turbines   yield estimation   yield estimation   yield estimation  

摘要： With the growing adoption of renewable energy, hybrid wind-solar plants are gaining interest because they allow the increase of energy yield per unit of surface area. However, the presence of wind turbines creates unique shading scenarios for the solar panels. This work presents a simulation-based approach to investigate the solar plant's energy yield and converter IGBT lifetime in the presence of dynamic and fast-moving shadows created by the wind turbine blades. First, the need for a dynamic simulation as opposed to a static one is examined. Next, the sensitivity of Photovoltaic (PV) string orientation, PV string location, wind direction, Maximum Power Point Tracker (MPPT) control speed, and turbine rotor speeds on energy yield and IGBT lifetime are investigated in a case study. Results show that dynamic and static simulations can show vastly different results. MPPT can have difficulty with shadow flicker, resulting in different string voltages depending on the MPPT update speed and wind turbine rotor speed. The shadow flicker introduces additional temperature swings in the IGBT, but these are too small to add any significant lifetime consumption (<1.2%). Thus, the observed changes in lifetime consumption are caused mainly by controller behavior and static shadows. Finally, it is concluded that PV strings are better placed south, east, or west of the wind turbine for optimal energy yield and lifetime consumption. A northern placement can be suitable if there is a significant distance (+50 m) between the PV string and the wind turbine.

关键词： Insulated gate bipolar transistors (IGBT)  

摘要： Parallel configurations of power chips within a multichip IGBT power module (M-IGBT-PM) are employed to meet the required current and power ratings. When the internal chips of an M-IGBT-PM experience uneven temperature distributions and package aging, it becomes challenging to determine the maximum and average temperatures of the chips within the module. This paper investigates the relationship between four transient thermal-sensitive electrical parameters (T-TSEPs) derived from the Kelvin emitter voltage and the chip junction temperature, while establishing relevant mathematical models. It compares the sensitivity and linearity of these four T-TSEPs, and also assesses the influence of external gate resistance, bus voltage, and load current on each of them. A key innovation in this paper is the proposal of a method for monitoring the maximum and average temperatures across the chips within the M-IGBT-PM, which is not influenced by the load current. The experimental results suggest that the temperature derived from the quasi-turn-on delay time is a good approximation of the maximum chip temperature, whereas the temperatures predicted by the other T-TSEPs are nearer to the average temperature. © 2025 IEEE.

关键词： 永磁同步电动机   矢量控制   最大转矩电流比   磨机  

摘要： 针对传统磨机重载启动、启动电流大的工况，结合永磁同步电动机(PMSM)效率高、低速性能好、过载能力强等优势，采用转矩输出能力强的最大转矩电流比控制，提出一种无传感器的永磁同步电动机矢量控制技术，省去了传统的气动离合器和专用的励磁装置，使磨机系统更加简单。在内蒙古某现场应用，结果表明：该技术能够实现磨机大转矩启动、高动态性能和高功率因数，且具有启动平稳、机械冲击小等优点。

关键词： 氧枪   S120变频器   故障应急   DDS数据组  

摘要： 变频器控制在工业生产领域中占主导地位，它可以精确控制电机的运行状态，确保生产工艺的稳定性和一致性。基于长钢公司炼钢氧枪变频控制的实际情况，针对S120变频器控制系统应急措施中存在的不足，提出了相应的解决方案。实践证明，采用改造方案后，既能提升变频氧枪控制系统的安全性能，又能提高企业的经济效益。

关键词： Insulated gate bipolar transistors (IGBT)  

摘要： Throughout many Industries, pulse width modulation voltage source inverters (PWM-VSI) are commonly utilized within adjustable speed drives (ASD) to control induction motors. For many application within various heavy industries, the cables connecting the output of some ASDs to their motor loads can be extremely long. These long cable applications can cause several operational challenges. As an innovative solution, an alternative system configuration has been previously proposed, in which the rectifier is kept in its typical location, and the inverter bridge and DC bus capacitors are installed near the driven motor. The long cables running from the ASD to the motor are used as a DC transmission line, mitigating the high-frequency problems resulting from the inverter-cable-motor interaction. However, new concerns regarding the reliability of the power devices arise once the inverter is installed in harsh ambient conditions. In this context, this work proposes a reliability analysis of such drive configuration, applying the physics of failure (PoF) approach combined with the design for reliability methodology to carry out the design adjustments to achieve the reliability and minimizing implementation costs required for the application, focusing on the inverter IGBT modules. The results show that a three-level active neutral point clamped inverter (3L-ANPC) topology, applying two pulse width modulation (PWM) strategies and 400 Amp. - 6.5 kV IGBTs, would be the most appropriate from this study's reliability and feasibility analyses. © 1972-2012 IEEE.

关键词： 分布式变频器   汽车焊装车间   输送领域  

摘要： 在汽车焊装车间，分布式变频器的应用比较普遍，相比集中控制方式，该设备的应用优势比较突出。该设备可以节约安装空间、提升防护等级，可直接应用于车间现场作业，达到控制使用成本的效果。本文对分布式变频器进行概述，分析其在汽车领域的应用优势，并总结了其在汽车焊装车间输送领域的具体应用情况，最后展望了该设备在汽车领域的应用发展趋势。

关键词： 分布式驱动电动汽车   纵-垂向运动协同控制   轮胎非线性   线性参数时变模型   快速控制原型  

摘要： 以分布式电驱动底盘为载体的电动汽车赋予车辆更为灵活和模块化的控制模式。然而，在复杂城市交通场景下，车辆频繁的加减速行为对整车的纵-垂向运动控制提出极大的挑战，为此，旨在利用转矩矢量控制与主动悬架系统的集成提升分布式驱动电动汽车的纵、垂向综合运动性能。首先，面向直线行驶工况，构建半车动力学模型，考虑到轮胎的非线性特性，通过拟合轮胎力，实时求解等效的轮胎侧偏刚度，在此基础上，引入线性参数时变模型解决车速与侧偏刚度带来的系统不确定性问题，从而降低算法优化过程的计算负担；其次，采用模型预测控制将车辆安全、节能及舒适性作为控制目标，其中轮胎滑移率及电机效率、执行器能耗及车辆垂向运动等指标作为目标函数进行优化，控制器求解过程推导了满足系统多性能要求的硬约束条件；选取ECE(联合国欧洲经济委员会汽车法规)作为测试工况，通过快速控制原型试验对所设计的算法进行了验证，结果表明，该控制器能够在保证车辆稳定的基础上，综合提升整车的节能性和舒适性，在连续加速行为下，轮胎最大滑移率较线性二次规划算法可降低约24%，电机效率可以保持在88%以上，同时垂向运动性能也可得到极大改善。

关键词： 2-step   4-quadrant switch   4-step   current commutation   efficiency   matrix converter   ON state voltage drop   Si IGBT   SiC MOSFET   turn ON/OFF times   2-step   4-quadrant switch   4-step   current commutation   efficiency   matrix converter   ON state voltage drop   Si IGBT   SiC MOSFET   turn ON/OFF times  

摘要： Silicon Carbide (SiC) MOSFETs are promising replacements for Silicon (Si) IGBTs in various power electronic topologies. While extensive research exists on SiC MOSFET based 2-quadrant switches, studies on 4-quadrant switch topologies remain limited. A 4-quadrant switch is typically formed by combining multiple 2-quadrant switches such as MOSFETs, IGBTs, or diodes. Designing such topologies presents challenges, including commutation methods (2-step and 4-step), finite switching speed constraints, variable ON state voltage drops, and quadrant-dependent transition (turn ON/OFF) times. This research systematically investigates these challenges through analysis, simulation, and experimental validation in a controlled FPGA based test environment. The study focuses on selecting an optimal commutation method, analysing the impact of 2-step and 4-step switching on transition times and ON state voltage drops, and evaluating the maximum switching frequency and efficiency of converters utilizing SiC MOSFET based 4-quadrant switches. The findings demonstrate the advantages of these converters in terms of reduced transition times, higher switching frequencies, and improved efficiency, establishing SiC MOSFET based 4-quadrant switches as a viable alternative to Si IGBT based designs.

关键词： 换流回路   死区时间   压接式IGBT   开关损耗均衡   三电平有源中点钳位  

摘要： 针对压接式IGBT组成的功率单元换流暂态时间优化及损耗平衡问题，依据产生损耗位置将三电平有源中点钳位单元的32种换流回路分为5种．为提高输出谐波特性，研究换流暂态过程进而优化切换暂态时间．利用4.5 V/3 A压接式IGBT制作了低杂感功率单元，设计双脉冲实验研究暂态电压电流变化规律．将开关暂态过程分成6种，并迭代优化死区时间．实验结果表明：死区时间优化后可以实现安全换流，换流过程的电压电流变化规律与理论分析一致．