Some convergences of topology are discussed. The definitions of almost uniform convergence topology and compatible topology are given. It is shown that the quasiuniform convergence and generalized uniform convergence ...Some convergences of topology are discussed. The definitions of almost uniform convergence topology and compatible topology are given. It is shown that the quasiuniform convergence and generalized uniform convergence have no compatible topology,but the almost uniform convergence has compatible topology. Moreover, the description of all uniform convergence limits and their mutual relation are investigated[1].展开更多
On the basis of concept of element node topological analysis, the normalized element node topological matrices for finite element meshes are presented in the paper, including 3-node and 6-node triangular element, 4-n...On the basis of concept of element node topological analysis, the normalized element node topological matrices for finite element meshes are presented in the paper, including 3-node and 6-node triangular element, 4-node and 8-node quadrilateral element, 8-node and 20-node hexahedral element. It is beneficial to further analyzing topological characteristics of finite element models and automatic generation of meshes展开更多
为了简化感应电能传输(inductive power transfer,IPT)电池充电系统原边与副边电路的设计和控制复杂性,该文提出通过在原边电路加入一个附加电容和一个半导体开关的方法实现对电池恒流恒压切换充电,无需调节逆变器直流输入电压、原边移...为了简化感应电能传输(inductive power transfer,IPT)电池充电系统原边与副边电路的设计和控制复杂性,该文提出通过在原边电路加入一个附加电容和一个半导体开关的方法实现对电池恒流恒压切换充电,无需调节逆变器直流输入电压、原边移相控制及副边加入调压电路。恒流模式时,配置的补偿电容完全补偿原边线圈;恒压模式时,只需一个开关切出或者切入附加电容。该方法只需简单的通信(用于充电模式切换),没有复杂的控制策略,结构简单,成本低。实验表明,所提出方法输出的恒流和恒压随着电池等效负载电阻改变而轻微变化,但结果仍然满足电池充电要求。展开更多
感应电能传输(inductive power transfer,IPT)系统的耦合机构偏移造成耦合线圈互感变化,导致输出电压偏离额定值,影响系统的可用性。为此,提出一种基于串联补偿拓扑的电路参数优化方法,来提高系统在负荷变化和耦合机构偏移情况下电压增...感应电能传输(inductive power transfer,IPT)系统的耦合机构偏移造成耦合线圈互感变化,导致输出电压偏离额定值,影响系统的可用性。为此,提出一种基于串联补偿拓扑的电路参数优化方法,来提高系统在负荷变化和耦合机构偏移情况下电压增益的平稳性。最后,搭建了实验原型机来验证该方法的有效性,结果表明:系统参数优化后,当耦合线圈偏移时互感由47.5?H变化至66.6?H,交流侧负载由15?变化至25??时,电压增益波动范围为0.52～0.64,对应波动比例为10.3%,比理论波动值高0.3%。系统效率始终高于94.2%,且最高值达95.79%。展开更多
文摘Some convergences of topology are discussed. The definitions of almost uniform convergence topology and compatible topology are given. It is shown that the quasiuniform convergence and generalized uniform convergence have no compatible topology,but the almost uniform convergence has compatible topology. Moreover, the description of all uniform convergence limits and their mutual relation are investigated[1].
文摘On the basis of concept of element node topological analysis, the normalized element node topological matrices for finite element meshes are presented in the paper, including 3-node and 6-node triangular element, 4-node and 8-node quadrilateral element, 8-node and 20-node hexahedral element. It is beneficial to further analyzing topological characteristics of finite element models and automatic generation of meshes
文摘为了简化感应电能传输(inductive power transfer,IPT)电池充电系统原边与副边电路的设计和控制复杂性,该文提出通过在原边电路加入一个附加电容和一个半导体开关的方法实现对电池恒流恒压切换充电,无需调节逆变器直流输入电压、原边移相控制及副边加入调压电路。恒流模式时,配置的补偿电容完全补偿原边线圈;恒压模式时,只需一个开关切出或者切入附加电容。该方法只需简单的通信(用于充电模式切换),没有复杂的控制策略,结构简单,成本低。实验表明,所提出方法输出的恒流和恒压随着电池等效负载电阻改变而轻微变化,但结果仍然满足电池充电要求。
文摘感应电能传输(inductive power transfer,IPT)系统的耦合机构偏移造成耦合线圈互感变化,导致输出电压偏离额定值,影响系统的可用性。为此,提出一种基于串联补偿拓扑的电路参数优化方法,来提高系统在负荷变化和耦合机构偏移情况下电压增益的平稳性。最后,搭建了实验原型机来验证该方法的有效性,结果表明:系统参数优化后,当耦合线圈偏移时互感由47.5?H变化至66.6?H,交流侧负载由15?变化至25??时,电压增益波动范围为0.52～0.64,对应波动比例为10.3%,比理论波动值高0.3%。系统效率始终高于94.2%,且最高值达95.79%。
