感应式电能传输技术IPT(inductive power transfer)应用到电动汽车中具有许多独特的优点。由于IPT变换器输出特性复杂,与变压器参数、补偿参数、工作频率和负载均有关,而电池在整个充电过程中负载变化范围宽,故IPT变换器难以直接提供负...感应式电能传输技术IPT(inductive power transfer)应用到电动汽车中具有许多独特的优点。由于IPT变换器输出特性复杂,与变压器参数、补偿参数、工作频率和负载均有关,而电池在整个充电过程中负载变化范围宽,故IPT变换器难以直接提供负载电池所需的充电电流或电压。针对此问题,根据4种基本的IPT补偿结构的输入和输出特性,找到可同时实现输入纯阻性和输出恒流或恒压的拓扑结构及工作条件,从而解耦负载对输出的影响,消除无功功率。但单个拓扑无法满足电池先恒流后恒压的充电特性,因此进一步提出了一类复合拓扑结构,采用最少的器件实现恒流拓扑和恒压拓扑的切换,电路简单可靠,传输效率高。展开更多
Realistic networks display not only a complex topological structure, but also a heterogeneous distribution of weights in connection strengths. In addition, the information spreading through a complex network is often ...Realistic networks display not only a complex topological structure, but also a heterogeneous distribution of weights in connection strengths. In addition, the information spreading through a complex network is often associated with time delays due to the finite speed of signal transmission over a distance. Hence, the weighted complex network with coupling delays have meaningful implications in real world, and resultantly gains increasing attention in various fields of science and engineering. Based on the theory of asymptotic stability of linear time-delay systems, synchronization stability of the weighted complex dynamical network with coupling delays is investigated, and simple criteria are obtained for both delay-independent and delay-dependent stabilities of synchronization states. The obtained criteria in this paper encompass the established results in the literature as special cases. Some examples are given to illustrate the theoretical results.展开更多
文摘感应式电能传输技术IPT(inductive power transfer)应用到电动汽车中具有许多独特的优点。由于IPT变换器输出特性复杂,与变压器参数、补偿参数、工作频率和负载均有关,而电池在整个充电过程中负载变化范围宽,故IPT变换器难以直接提供负载电池所需的充电电流或电压。针对此问题,根据4种基本的IPT补偿结构的输入和输出特性,找到可同时实现输入纯阻性和输出恒流或恒压的拓扑结构及工作条件,从而解耦负载对输出的影响,消除无功功率。但单个拓扑无法满足电池先恒流后恒压的充电特性,因此进一步提出了一类复合拓扑结构,采用最少的器件实现恒流拓扑和恒压拓扑的切换,电路简单可靠,传输效率高。
基金supported by National Natural Science Foundation of China under Nos. 10702023 and 10832006China Post-doctoral Special Science Foundation No. 200801020+1 种基金the Natural Science Foundation of Inner Mongolia Autonomous Region under Grant No. 2007110020110supported in part by the Project of Knowledge Innovation Program (PKIP) of Chinese Academy of Sciences
文摘Realistic networks display not only a complex topological structure, but also a heterogeneous distribution of weights in connection strengths. In addition, the information spreading through a complex network is often associated with time delays due to the finite speed of signal transmission over a distance. Hence, the weighted complex network with coupling delays have meaningful implications in real world, and resultantly gains increasing attention in various fields of science and engineering. Based on the theory of asymptotic stability of linear time-delay systems, synchronization stability of the weighted complex dynamical network with coupling delays is investigated, and simple criteria are obtained for both delay-independent and delay-dependent stabilities of synchronization states. The obtained criteria in this paper encompass the established results in the literature as special cases. Some examples are given to illustrate the theoretical results.
