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基于电流源型逆变器驱动的五相永磁同步电机控制策略研究

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中国电机工程学报 2024年第7期44卷 2843-2852,I0027页

作者：杨士杰郑萍佟诚德隋义王明峤哈尔滨工业大学电气工程及自动化学院黑龙江省哈尔滨市150001

在现代电机驱动系统中,采用电流源型逆变器控制方案可有效提升系统可靠性,降低电机电流谐波含量,并提升电磁兼容性能。电流源型逆变器拓扑采用电感元件作为母线储能装置,对于功率回路中的短路故障具有较强的抵抗能力。同时,逆变器输出... 详细信息

在现代电机驱动系统中,采用电流源型逆变器控制方案可有效提升系统可靠性,降低电机电流谐波含量,并提升电磁兼容性能。电流源型逆变器拓扑采用电感元件作为母线储能装置,对于功率回路中的短路故障具有较强的抵抗能力。同时,逆变器输出侧并联滤波电容网络,实现对高频谐波的旁路作用。该文对五相电流源型驱动系统控制策略进行研究,采用五相半桥型逆变器拓扑结构,电机绕组采用星型连接方式以限制零序电流,给出基波与谐波电流矢量空间分布特征,提出双平面矢量脉宽调制策略,有效抑制3次谐波电流。考虑到逆变器输出侧CL型负载可能引起的谐振问题,采用基于电机电流的有源阻尼策略,降低谐振电流分量,提升系统稳定性。最后,通过实验验证所提控制策略的有效性。

关键词：五相永磁同步电机驱动电流源型逆变器电流型空间矢量调制 CL谐振有源阻尼

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CES Transactions on Electrical Machines and Systems 2022年第1期6卷 1-2页

作者： Ping Zheng Fengge Zhang Shoudao Huang Deliang Liang Bo Zhou Xiuhe Wang Wei Hua Wenxiang Zhao Xiaoyong Zhu chengde tong Jingang Bai Yi Sui Mingqiao Wang Harbin Institute of Technology Shenyang University of Technology Hunan University Xi’an Jiaotong University Nanjing University of Aeronautics and Astronautics Shandong University Southeast University Jiangsu University

SPECIAL motor systems are high-efficiency and high-quality electromechanical energy conversion devices suitable for complex operating conditions.As key components,special motor systems are widely used in the fields of aerospace,energy,power,transportation,high-end manufacturing,etc.Innovations of fundamental theories and application technologies in special motor systems can promote the progress of related disciplines and fields,which has drawn great attentions from countries all over the world.

关键词： Message SPEC conditions

Research on System Control and Energy Management Strategy of Flux-Modulated Compound-Structure Permanent Magnet Synchronous Machine

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CES Transactions on Electrical Machines and Systems 2017年第2期1卷 100-108页

作者： Jiaqi Liu chengde tong Zengfeng Jin Guangyuan Qiao Ping Zheng school of Electrical Engineering and Automation Harbin Institute of TechnologyHarbinChina SAIC Motor ShanghaiChina

The flux-modulated compound-structure permanent magnet synchronous machine (CS-PMSM), composed of a brushless double rotor machine (DRM) and a conventional permanent magnet synchronous machine (PMSM), is a power split device for plug-in hybrid electric vehicles. In this paper, its operating principle and mathematical model are introduced. A modified current controller with decoupled state feedback is proposed and verified. The system control strategy is simulated in Matlab, and the feasibility of the control system is proven. To improve fuel economy, an energy management strategy based on fuzzy logic controller is proposed and evaluated by the Urban Dynamometer Driving Schedule (UDDS) drive cycle. The results show that the total energy consumption is similar to that of Prius 2012.

关键词： CS-PMSM energy management strategy flux-modulated hybrid electric vehicle system control

Identification and validation of a new prognostic signature based on cancer-associated fibroblast-driven genes in breast cancer

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World Journal of Clinical Cases 2024年第4期12卷 700-720页

作者： Zi-Zheng Wu Yuan-Jun Wei tong Li Jie Zheng Yin-Feng Liu Meng Han Diagnosis and Treatment Center The First Hospital of QinhuangdaoQinhuangdao 066000Hebei ProvinceChina Department of General Surgery Hebei Medical UniversityShijiazhuang 050000Hebei ProvinceChina Breast Disease Diagnosis and Treatment Center The First Hospital of QinhuangdaoHebei Medical UniversityQinhuangdao 066000Hebei ProvinceChina Breast Disease Diagnosis and Treatment Center Chengde Medical CollegeChengde 067000Hebei ProvinceChina

BACKGROUND Breast cancer(BC),a leading malignant disease,affects women all over the world.Cancer associated fibroblasts(CAFs)stimulate epithelial-mesenchymal transition,and induce chemoresistance and immunosuppression.AIM To establish a CAFs-associated prognostic signature to improve BC patient out-come estimation.METHODS We retrieved the transcript profile and clinical data of 1072 BC samples from The Cancer Genome Atlas(TCGA)databases,and 3661 BC samples from the The Gene Expression Omnibus.CAFs and immune cell infiltrations were quantified using CIBERSORT algorithm.CAF-associated gene identification was done by weighted gene co-expression network analysis.A CAF risk signature was established via univariate,least absolute shrinkage and selection operator regression,and mul-tivariate Cox regression analyses.The receiver operating characteristic(ROC)and Kaplan-Meier curves were employed to evaluate the predictability of the model.Subsequently,a nomogram was developed with the risk score and patient clinical signature.Using Spearman's correlations analysis,the relationship between CAF risk score and gene set enrichment scores were examined.Patient samples were collected to validate gene expression by quantitative real-time polymerase chain reaction(qRT-PCR).RESULTS Employing an 8-gene(IL18,MYD88,GLIPR1,TNN,BHLHE41,DNAJB5,FKBP14,and XG)signature,we attemp-ted to estimate BC patient prognosis.Based on our analysis,high-risk patients exhibited worse outcomes than low-risk patients.Multivariate analysis revealed the risk score as an independent indicator of BC patient prognosis.ROC analysis exhibited satisfactory nomogram predictability.The area under the curve showed 0.805 at 3 years,and 0.801 at 5 years in the TCGA cohort.We also demonstrated that a reduced CAF risk score was strongly associated with enhanced chemotherapeutic outcomes.CAF risk score was significantly correlated with most hallmark gene sets.Finally,the prognostic signature were further validated by qRT-PCR.CONCLUSION We introduced a newly-discovered

关键词： Breast cancer Prognosis Gene signature The Cancer Genome Atlas The Gene Expression Omnibus

采用六相八桥臂变流器永磁同步电机系统的驱动及容错控制仿真研究

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电源学报 2016年第5期14卷 15-23页

作者：佟诚德许兵程路明王鹏飞郑萍哈尔滨工业大学电气工程及自动化学院哈尔滨150080

对双Y移30°的六相永磁电机控制系统分析时,如果电机本体结构设计时各相绕组间互感可以忽略不计,可以将其看作2套三相子控制系统进行分析。参考常规三相半桥拓扑结构下电机的建模,对三相四桥臂拓扑结构下的子系统进行建模;在三相半桥控... 详细信息

对双Y移30°的六相永磁电机控制系统分析时,如果电机本体结构设计时各相绕组间互感可以忽略不计,可以将其看作2套三相子控制系统进行分析。参考常规三相半桥拓扑结构下电机的建模,对三相四桥臂拓扑结构下的子系统进行建模;在三相半桥控制系统空间矢量调制原理的基础上,提出了三相四桥臂的三维静止坐标系下的空间矢量调制原理;最后,对常见的一相故障提出两种容错控制策略,并利用仿真对控制策略进行验证。

关键词：双三相永磁同步电机数学模型三相四桥臂电压源逆变器三维空间矢量调制容错控制

An in-depth understanding of improvement strategies and corresponding characterizations towards Zn anode in aqueous Zn-ions batteries

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Green Energy & Environment 2023年第4期8卷 1006-1042页

作者： Yuzhu Chu Lingxiao Ren Zhenglin Hu chengde Huang Jiayan Luo Key Laboratory for Green Chemical Technology of Ministry of Education School of Chemical Engineering and TechnologyTianjin UniversityTianjin300072China Key Laboratory of Materials Processing and Mold(Zhengzhou University) Ministry of EducationZhengzhou450002China Shanghai Key Lab of Advanced High-Temperature Materials and Precision Forming School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai200240China

Combining the unique advantages of aqueous electrolytes and metallic Zn anode, rechargeable aqueous Zn-ion batteries(ZIBs) are of great promise for large-scale energy storage applications due to their inherent high safety, low cost, and environmental friendliness. As the essential component of ZIBs, Zn metal anode suffers from severe dendrite formation and inevitable side reactions(e.g. corrosion and hydrogen evolution)in aqueous electrolytes, which leads to low Coulombic efficiency and inferior cycling stability, impeding their large-scale applications. To be compatible with satisfactory aqueous ZIBs, Zn anode has been modified from various perspectives and focus areas. Herein, based on their intrinsic characteristics, we review the related improvement strategies for Zn anode, including interphase, substrate, and bulk design, so as to achieve an in-depth understanding of Zn anode optimization. Furthermore, the timely summary of characterization methods for Zn anodes are also performed for the first time, from both thermodynamic and kinetics perspectives, which is particularly helpful for beginners to understand the complicated characterizations and employ suitable methods. Finally, certain noteworthy points are put forward for subsequent investigation of aqueous ZIBs. It is expected that this review will enlighten researchers to explore more efficient optimization strategies for Zn anode in aqueous electrolytes.

关键词： Zn anodes Corrosion Dendrite Batteries Electrolyte

Processable Potassium Metal Anode for Stable Batteries

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Energy & Environmental Materials 2022年第4期5卷 1278-1284页

作者： Zhenghang Wei Aoxuan Wang Xuze Guan Guojie Li Zhiwei Yang chengde Huang Jing Zhang Libin Ren Jiayan Luo Xingjiang Liu Key Laboratory for Green Chemical Technology of Ministry of Education State Key Laboratory of Chemical EngineeringSchool of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China Key Laboratory of Materials Processing and Mold Zhengzhou UniversityMinistry of EducationZhengzhou 450002China Jiangxi Key Laboratory of Nanobiomaterials Institute of Advanced MaterialsEast China Jiaotong UniversityNanchang 330013China National Key Laboratory of Science and Technology on Power Sources Tianjin Institute of Power SourcesTianjin 300384China Shanghai Key Lab of Advanced High-Temperature Materials and Precision Forming School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China

The future of high-energy density electrochemical energy storage systems relies on the advancement of rechargeable batteries that utilize reactive metals as anodes.In the alkaline metal,secondary battery systems because of abundant resource,high capacity and low redox potential,potassium(K)metal secondary battery(KMB)is expected to replace the existing lithiumion battery as a versatile platform for high-energy density,cost-effective energy storage devices.However,the difficulty in processing metal K results in nonstandard electrodes and hinders the development of KMBs.Furthermore,the mobility of the K metal anode due to its unique lowmelting point character at elevated temperatures in practical conditions leads to severe instability and risks in chemical/electrochemical processes.Herein,we fabricate a processable and moldable composite K metal anode by encapsulating K into reduced graphene oxide(rGO).The composite electrode can be engineered into various shapes discretionarily with precise sizes and stabilize the K metal anode at relatively high temperatures.Remarkably,the composite anode exhibits excellent cycling performance at high current density(8 mA cm^(-2)) with dendrite-free morphology.Paired with a Prussian blue cathode,the rGO-K composite anode shows much improved electrochemical performance and extended lifetime.

关键词： K metal anode K metal battery processibility reduced graphene oxide stability

危重烧伤老年患者早期临床特征的多中心回顾分析及预后的危险因素分析

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中华烧伤与创面修复杂志 2024年第3期40卷 249-257页

作者：马琪敏汤文彬李孝建常菲尹希陈昭宏吴国华夏成德李晓亮王德运储志刚张逸王磊吴抽浪童亚林崔培郭光华朱志豪黄圣宇常刘刘锐刘永计王玉松刘晓彬沈拓朱峰海军军医大学第一附属医院烧伤外科上海200433 同济大学附属东方医院重症医学科上海200120 暨南大学附属广州市红十字会医院烧伤整形科广州510220 张家港市第一人民医院烧伤整形科张家港215600 福建医科大学附属协和医院烧伤科福州350001 郑州市第一人民医院烧伤科郑州450004 武汉大学同仁医院暨武汉市第三医院烧伤科武汉430060 南通大学附属医院烧伤整形科南通226001 浙江省台州医院烧伤科临海317000 解放军第924医院烧伤整形科桂林541002 南昌大学第一附属医院烧伤整形与创面修复医学中心南昌330006 大连市第四人民医院烧伤整形科大连116031 黑龙江省医院烧伤科哈尔滨150036

目的探讨危重烧伤老年患者早期临床特征及预后的危险因素。方法该研究为回顾性病例系列研究。收集2015年1月—2020年12月12家医院收治的符合入选标准的124例危重烧伤老年患者的临床资料,其中大连市第四人民医院4例、福建医科大学附属协... 详细信息

目的探讨危重烧伤老年患者早期临床特征及预后的危险因素。方法该研究为回顾性病例系列研究。收集2015年1月—2020年12月12家医院收治的符合入选标准的124例危重烧伤老年患者的临床资料,其中大连市第四人民医院4例、福建医科大学附属协和医院5例、暨南大学附属广州市红十字会医院22例、黑龙江省医院5例、海军军医大学第一附属医院27例、南昌大学第一附属医院9例、南通大学附属医院10例、武汉大学同仁医院暨武汉市第三医院9例、解放军第924医院12例、张家港市第一人民医院6例、浙江省台州医院4例、郑州市第一人民医院11例。统计患者的总体临床特征,包括性别、年龄、体重指数、烧伤总面积、Ⅲ度烧伤面积、吸入性损伤情况、致伤因素、是否合并基础疾病以及伤后入院时间。根据伤后28 d内的存活结局,将患者分为存活组(89例)与死亡组(35例),比较2组患者基本资料与伤情(同前总体临床特征);伤后第1个24 h凝血指标,包括凝血酶原时间(PT)、活化部分凝血活酶时间(APTT)、凝血酶时间、D-二聚体、纤维蛋白降解产物(FDP)、国际标准化比值(INR)、纤维蛋白原;伤后第1个24 h血常规指标,包括白细胞计数、血小板计数、中性粒细胞与淋巴细胞比值、单核细胞计数、红细胞计数、血红蛋白、血细胞比容;伤后第1个24 h脏器功能指标,包括直接胆红素、总胆红素、尿素、血肌酐、天冬氨酸转氨酶、丙氨酸转氨酶、总蛋白、白蛋白、球蛋白、血糖、甘油三酯、总胆固醇、碱性磷酸酶、肌酸激酶、电解质指标(血钾、血钠、血氯、血钙、血镁及血磷)、尿酸、肌红蛋白、脑钠肽;伤后第1个24 h感染及血气指标,包括降钙素原、C反应蛋白、pH值、氧合指数、碱剩余、乳酸;治疗情况,包括是否行机械通气、是否行连续性肾脏替代治疗、是否行抗凝治疗、是否应用血管活性药及液体复苏情况。筛选影响危重烧伤老年患者伤后28 d死亡的独立危险因素。结果124例患者中男82例、女42例,年龄60~97岁,体重指数23.44(21.09,25.95)kg/m^(2),烧伤总面积54.00%(42.00%,75.00%)体表总面积(TBSA),Ⅲ度烧伤面积25.00%(10.00%,40.00%)TBSA,主要为中重度吸入性损伤,以火焰烧伤者为主,合并基础疾病者43例,以伤后入院时间≤8 h者为主。2组患者年龄,烧伤总面积,Ⅲ度烧伤面积,吸入性损伤情况,伤后第1个24 h PT、APTT、D-二聚体、FDP、INR、白细胞计数、血小板计数、尿素、血肌酐、血糖、血钠、尿酸、肌红蛋白、尿量比较,差异均有统计学意义(Z值分别为2.37、5.49、5.26、5.97、2.18、1.95、2.68、2.68、2.51、2.82、2.14、3.40、5.31、3.41、2.35、3.81、2.16、-3.82,P<0.05);是否行机械通气、是否应用血管活性药比较,差异均有统计学意义(χ^(2)值分别为9.44、28.50,P<0.05)。年龄、烧伤总面积、Ⅲ度烧伤面积、伤后第1个24 h血肌酐、伤后第1个24 h APTT均为危重烧伤老年患者伤后28 d死亡的独立危险因素(比值比分别为1.17、1.10、1.10、1.09、1.27,95%置信区间分别为1.03~1.40、1.04~1.21、1.05~1.19、1.05~1.17、1.07~1.69,P<0.05)。结论危重烧伤老年患者多为火焰烧伤,常伴随中重度吸入性损伤,早期常伴有炎症反应增强、血糖升高、纤溶激活、脏器功能损害等,这与其预后相关。年龄、烧伤总面积、Ⅲ度烧伤面积、伤后第1个24 h血肌酐和APTT是该群体伤后28 d死亡的独立危险因素。

关键词：烧伤老年人预后危险因素回顾性研究

Continuation,reduction,or withdrawal of tofacitinib in patients with rheumatoid arthritis achieving sustained disease control:a multicenter,open-label,randomized controlled trial

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Chinese Medical Journal 2023年第3期136卷 331-340页

作者： Mengyan Wang Yu Xue Fang Du Lili Ma Liang-jing Lu Lindi Jiang Yi-Li Tao chengde Yang Hui Shi Honglei Liu Xiaobing Cheng Junna Ye Yutong Su Dongbao Zhao Sheng-Ming Dai Jialin Teng Qiongyi Hu Department of Rheumatology and Immunology Ruijin HospitalShanghai Jiao Tong University School of MedicineShanghai 200025China Department of Rheumatology and Immunology Huashan Hospital Affiliated to Fudan UniversityShanghai 200040China Department of Rheumatology Renji HospitalShanghai Jiaotong University School of MedicineShanghai 200127China Department of Rheumatology Zhongshan HospitalFudan UniversityShanghai 200032China Department of Rheumatology and Immunology Shanghai Sixth People’s HospitalShanghai Jiao Tong University School of MedicineShanghai 200233China Department of Rheumatology and Immunology Changhai HospitalNaval Medical UniversityShanghai 200433China

Background:Rheumatoid arthritis(RA),a chronic systemic autoimmune disease,is characterized by synovitis and progressive damage to the bone and cartilage of the joints,leading to disability and reduced quality of life.This study was a randomized clinical trial comparing the outcomes between withdrawal and dose reduction of tofacitinib in patients with RA who achieved sustained disease control.Methods:The study was designed as a multicenter,open-label,randomized controlled trial.Eligible patients who were taking tofacitinib(5 mg twice daily)and had achieved sustained RA remission or low disease activity(disease activity score in 28 joints[DAS28]≤3.2)for at least 3 months were enrolled at six centers in Shanghai,China.Patients were randomly assigned(1:1:1)to one of three treatment groups:continuation of tofacitinib(5 mg twice daily);reduction in tofacitinib dose(5 mg daily);and withdrawal of tofacitinib.Efficacy and safety were assessed up to 6 months.Results:Overall,122 eligible patients were enrolled,with 41 in the continuation group,42 in the dose-reduction group,and 39 in the withdrawal group.After 6 months,the percentage of patients with a DAS28-erythrocyte sedimentation rate(ESR)of<3.2 was significantly lower in the withdrawal group than that in the reduction and continuation groups(20.5%,64.3%,and 95.1%,respectively;P<0.0001 for both comparisons).The average flare-free time was 5.8 months for the continuation group,4.7 months for the dose reduction group,and 2.4 months for the withdrawal group.Conclusion:Withdrawal of tofacitinib in patients with RA with stable disease control resulted in a rapid and significant loss of efficacy,while standard or reduced doses of tofacitinib maintained a favorable state.Trial Registration:***,ChiCTR2000039799.

关键词： Tofacitinib Rheumatoid arthritis Withdrawal Dose reduction