A self-designed and developed 12/10 switched reluctance motor(SRM)is chosen as the object of study and a prototype of 2.5?kW switched reluctance starter/generator with fly-wheel is designed based on the requirements o...A self-designed and developed 12/10 switched reluctance motor(SRM)is chosen as the object of study and a prototype of 2.5?kW switched reluctance starter/generator with fly-wheel is designed based on the requirements of the selected engine (Changan Aotooc three-cylinder engine wagon) for the starter, generator and drive. The 36?V/42 V DC source system is applied to establishing the simulation-analyzing model of the motor. A finite-element (FE) analysis of its two-dimensional electromagnetic field is conducted to obtain the exact model of the motor. Systematic simulation is carried out combining with its power conversion circuit and control element. Meanwhile the starting process and performance of the system are studied and analyzed with special efforts. Satisfactory result is derived from the testing of the prototype: theoretical analysis is basically matched with the tested data, which proves the rationality and feasibility of the design procedures, systematic modeling and control strategies. Therefore, the new 12/10-structure scheme is put forward based on the development and analysis of various SRM and it meets the requirements of the researched motor in terms of the structural parameters.展开更多
特藏资源往往是由数量众多、类型多样的文献所组成,对特藏资源的组织和著录不仅需要对构成特藏的每一种单一文献进行描述,更需要对特藏的整体及文献间的关系进行揭示。国内存在仍然以单种/册文献为著录对象、缺少对资源间层级关系的揭...特藏资源往往是由数量众多、类型多样的文献所组成,对特藏资源的组织和著录不仅需要对构成特藏的每一种单一文献进行描述,更需要对特藏的整体及文献间的关系进行揭示。国内存在仍然以单种/册文献为著录对象、缺少对资源间层级关系的揭示、著录未遵循统一标准等问题,严重影响到特藏资源的使用,也影响到特藏资源的共享和数据交换。究其原因,主要是国内尚未形成特藏资源组织和著录的统一标准。文章在调研国内外特藏资源层级著录相关研究和实践的基础上,从著录标准的角度探讨了在图书馆特藏资源的著录中采用国际档案理事会(International Council on Archives,ICA)颁布的《国际档案著录标准(总则)》(General International Standard Archival Description,ISAD(G))作为特藏资源著录标准的可行性,同时辅以复旦大学图书馆在特藏资源著录上的实践探索以供业界参考。展开更多
蓄电池荷电状态SOC(State of Charge)是电池使用过程中的重要参数。为了能够精确地预测蓄电池剩余电量,本文在对3种SOC基本估算方法分析和比较的基础上,采用了一种新的以蓄电池端电压和内阻为参数进行估计的方法,并按此种方法进行了蓄...蓄电池荷电状态SOC(State of Charge)是电池使用过程中的重要参数。为了能够精确地预测蓄电池剩余电量,本文在对3种SOC基本估算方法分析和比较的基础上,采用了一种新的以蓄电池端电压和内阻为参数进行估计的方法,并按此种方法进行了蓄电池放电试验。试验结果表明这种算法在SOC小于0.45时计算精确,能用来预测混合动力汽车蓄电池剩余电量。展开更多
文摘A self-designed and developed 12/10 switched reluctance motor(SRM)is chosen as the object of study and a prototype of 2.5?kW switched reluctance starter/generator with fly-wheel is designed based on the requirements of the selected engine (Changan Aotooc three-cylinder engine wagon) for the starter, generator and drive. The 36?V/42 V DC source system is applied to establishing the simulation-analyzing model of the motor. A finite-element (FE) analysis of its two-dimensional electromagnetic field is conducted to obtain the exact model of the motor. Systematic simulation is carried out combining with its power conversion circuit and control element. Meanwhile the starting process and performance of the system are studied and analyzed with special efforts. Satisfactory result is derived from the testing of the prototype: theoretical analysis is basically matched with the tested data, which proves the rationality and feasibility of the design procedures, systematic modeling and control strategies. Therefore, the new 12/10-structure scheme is put forward based on the development and analysis of various SRM and it meets the requirements of the researched motor in terms of the structural parameters.
文摘特藏资源往往是由数量众多、类型多样的文献所组成,对特藏资源的组织和著录不仅需要对构成特藏的每一种单一文献进行描述,更需要对特藏的整体及文献间的关系进行揭示。国内存在仍然以单种/册文献为著录对象、缺少对资源间层级关系的揭示、著录未遵循统一标准等问题,严重影响到特藏资源的使用,也影响到特藏资源的共享和数据交换。究其原因,主要是国内尚未形成特藏资源组织和著录的统一标准。文章在调研国内外特藏资源层级著录相关研究和实践的基础上,从著录标准的角度探讨了在图书馆特藏资源的著录中采用国际档案理事会(International Council on Archives,ICA)颁布的《国际档案著录标准(总则)》(General International Standard Archival Description,ISAD(G))作为特藏资源著录标准的可行性,同时辅以复旦大学图书馆在特藏资源著录上的实践探索以供业界参考。
文摘蓄电池荷电状态SOC(State of Charge)是电池使用过程中的重要参数。为了能够精确地预测蓄电池剩余电量,本文在对3种SOC基本估算方法分析和比较的基础上,采用了一种新的以蓄电池端电压和内阻为参数进行估计的方法,并按此种方法进行了蓄电池放电试验。试验结果表明这种算法在SOC小于0.45时计算精确,能用来预测混合动力汽车蓄电池剩余电量。
