Aiming at the prominent problem of the disconnection between theory,practice and industrial demand in the new energy vehicle power battery course,this paper constructs a new structured curriculum system of"three ...Aiming at the prominent problem of the disconnection between theory,practice and industrial demand in the new energy vehicle power battery course,this paper constructs a new structured curriculum system of"three levels and three models".Vertically,the system follows the capability generation logic of"basic cognition→technology application→system expansion",and sets up a three-level capability progressive main line composed of"electrochemical principle,Battery Management System(BMS)development and recycling process";Horizontally,through the deep integration of the three teaching modes of"virtual simulation(40%),physical operation(30%)and enterprise case(30%)",a multimodal teaching closed loop is formed,which effectively avoids the obstacles of high-cost and high-risk entity training.The core innovation of the system lies in the establishment of a dynamic mapping model of"post ability curriculum standard",and the introduction of a quantitative tool of"technology maturity teaching suitability",which ensures the synchronous iteration of curriculum content and industrial technology chain.Teaching practice shows that the system significantly improves students'engineering practice ability and innovation literacy,and provides a solution with both theoretical depth and practical feasibility for the systematic reconstruction of applied engineering courses,which has significant demonstration and promotion value.展开更多
The application areas of conventional push pull converters are limited because of high voltage stress of switches (twice of input voltage). This paper presents a novel zero voltage and zero current switching (ZCS)...The application areas of conventional push pull converters are limited because of high voltage stress of switches (twice of input voltage). This paper presents a novel zero voltage and zero current switching (ZCS) PWM push pull three level converter in which the voltage stress of switches is input voltage. With phase shifted modulation strategy, the leading switches can only realize zero voltage switching (ZVS), and the lagging switches can realize ZCS when block capacitor and block diodes are added. Using the strategy, the converter overcomes the drawbacks presented by the conventional push pull converter, such as magnetic aberration, large switch loss, and voltage spike on switches, so it can get higher efficiency, and a wider application area. The operating principle of the new converter is analyzed and verified on a 600 W, 50 kHz experimental prototype. Several zero voltage and zero current switching PWM push pull three level converters are proposed.展开更多
The three levels optimizing strategy is put forward for the networked manufacturing resources optimizing configuration, namely, the optimizing of a logical manufacturing process, the optimizing of simulation-based int...The three levels optimizing strategy is put forward for the networked manufacturing resources optimizing configuration, namely, the optimizing of a logical manufacturing process, the optimizing of simulation-based integration of process planning and scheduling, and the optimizing of networked production scheduling. Then, the web services-based architecture of networked manufacturing resources optimizing configuration is brought forward. Finally, the key algorithm of the networked manufacturing resources optimizing configuration is discussed, namely, the two phases manufacturing partners selection method, which including the group technology-based manufacturing resources pre-configuration and the genetic algorithm-based executable manufacturing process optimizing.展开更多
基金funding is provided by the Special Project for Outstanding Young Teachers of Geely University on Education and Teaching Reform in 2025(2025XJG0023)Chengdu Science and Technology Bureau Soft Science Research Project(2025-RK00-00046-ZF)。
文摘Aiming at the prominent problem of the disconnection between theory,practice and industrial demand in the new energy vehicle power battery course,this paper constructs a new structured curriculum system of"three levels and three models".Vertically,the system follows the capability generation logic of"basic cognition→technology application→system expansion",and sets up a three-level capability progressive main line composed of"electrochemical principle,Battery Management System(BMS)development and recycling process";Horizontally,through the deep integration of the three teaching modes of"virtual simulation(40%),physical operation(30%)and enterprise case(30%)",a multimodal teaching closed loop is formed,which effectively avoids the obstacles of high-cost and high-risk entity training.The core innovation of the system lies in the establishment of a dynamic mapping model of"post ability curriculum standard",and the introduction of a quantitative tool of"technology maturity teaching suitability",which ensures the synchronous iteration of curriculum content and industrial technology chain.Teaching practice shows that the system significantly improves students'engineering practice ability and innovation literacy,and provides a solution with both theoretical depth and practical feasibility for the systematic reconstruction of applied engineering courses,which has significant demonstration and promotion value.
文摘The application areas of conventional push pull converters are limited because of high voltage stress of switches (twice of input voltage). This paper presents a novel zero voltage and zero current switching (ZCS) PWM push pull three level converter in which the voltage stress of switches is input voltage. With phase shifted modulation strategy, the leading switches can only realize zero voltage switching (ZVS), and the lagging switches can realize ZCS when block capacitor and block diodes are added. Using the strategy, the converter overcomes the drawbacks presented by the conventional push pull converter, such as magnetic aberration, large switch loss, and voltage spike on switches, so it can get higher efficiency, and a wider application area. The operating principle of the new converter is analyzed and verified on a 600 W, 50 kHz experimental prototype. Several zero voltage and zero current switching PWM push pull three level converters are proposed.
基金This paper is supported by National High-Tech R&D Program for CIMS, China (Grant No. 2003AA411110) theNational Research Foundation for Doctoral Program of Higher Education, China (Grant No. 20040699025).
文摘The three levels optimizing strategy is put forward for the networked manufacturing resources optimizing configuration, namely, the optimizing of a logical manufacturing process, the optimizing of simulation-based integration of process planning and scheduling, and the optimizing of networked production scheduling. Then, the web services-based architecture of networked manufacturing resources optimizing configuration is brought forward. Finally, the key algorithm of the networked manufacturing resources optimizing configuration is discussed, namely, the two phases manufacturing partners selection method, which including the group technology-based manufacturing resources pre-configuration and the genetic algorithm-based executable manufacturing process optimizing.
