Design and Realization of CPW Circuits Using EC-ANN Models for CPW Discontinuities

将一种精确高效的等效电路训练人工神经网络模型引入共面波导不连续性结构建模.该建模算法继承了等效电路模型和电磁仿真人工神经网络模型的优点.此次开发并得到验证的共面波导不连续性结构模型包括:台阶段、叉指电容、对称十字节和螺旋电感.这些模型嵌入CAD仿真工具可以完成电路的设计、仿真和优化,最后通过一个GaAs工艺的共面波导带通滤波器的设计与实现验证了模型的有效性.     

高压线性电流传感器IR2175及其应用

IR2175是IR(International Rectifier)公司生产的高压线性电流传感器，它不用通过AID转换便可直接输出PWM数字信号，从而简化了电机控制电路的电流检测和保护操作，可方便地用于电机驱动系统中。文中介绍了IR2175的结构特点、引脚功能和主要特性，给出了其典型应用电路。     

BALANCED TRUNCATED MODELS OF C INTERCONNECT CIRCUITS AND THEIR SIMULATION

The Balanced Truncation Method (BTM) is applied to an even distributed RC interconnect case by using Wang's closed-forms of even distributed RC interconnect models. The results show that extremely high order RC interconnect can be high-accurately approximated by only third order balanced model. Related simulations are executed in both time domain and frequency domain. The results may be applied to VLSI interconnect model reduction and design.     

Inrush current estimation and hot-swapping for safe parallel battery pack

ABSTRACT

Batteries used in electric vehicles and microgrid applications use battery modules connected in series to satisfy the voltage required for each system, and battery modules are connected in parallel to increase capacity. In this parallel connected system, in order to disconnect and reconnect a specific battery module or to reconnect a new battery module, the battery module to be newly connected should have a small state of charge (SOC) difference from the existing battery modules. In particular, when a new battery is to be connected under a load current, there is a problem that excessive inrush current may occur in a specific battery module due to the load current distributed to each module and the current due to the SOC difference. Therefore, in this paper, we propose a method of estimating the inrush current through an equivalent electrical modelling analysis for the case where a battery module is newly added in a system in which the battery modules are connected in parallel. In addition, the power management algorithm for the battery pack system with inrush current estimation is presented. The proposed method is validated through simulations and experiments of a battery pack system in which 10 battery modules of 710V and 120Ah are connected in parallel.     

微课在“电路与模电”实验课教学中应用研究

为更好的提高实验教学效果,将微课引入“电路与模拟电子技术”实验教学,将实验仪器操作、实验涉及理论、仿真实验、拓展实验等多方面实验内容录制成微课,辅助学生学习、完成实验,解决传统实验教学课时少,内容多、实验模式固定、实验结果单一等问题,帮助提高学生实践应用能力。     

基于S7-300 PLC的泥沙输送实验台数据采集系统设计

本文提出一种基于S7-300 PLC的泥砂输送实验台的数据采集方案。该系统采用CPU模块和上位机组成中央控制站,分布式I/O模块组成现场工作站,设计PLC数据缓存程序,实现数据采集。上位机与PLC之间的数据传输采用OPC服务器,OPC客户端软件采用VC++编程开发。     

基于电磁降噪电路的恒流高清图像信号处理系统

本文设计了基于电磁降噪电路的恒流高清图像信号处理系统。系统中选用APW7120集成芯片作为中央处理芯片,以液晶显示器或智能终端显示屏作为显示单元,将信号滤波单元当作电子滤波器,据此,此系统可通过过滤图像信号内的干扰信号,优化图像信号质量;还可基于集成芯片直接简捷化系统结构,并控制系统自主生成的电磁噪声信号,以此保证系统在图像信号处理时不受电磁噪声影响,从而提高系统稳定性与可靠性;通过适度处理输入电流,可确保在正常运转时不会生成电磁干扰信号,以显著提升系统稳定性。     

基于PLC的模拟量闭环控制系统PID的实现

文章对模拟闭环控制系统的原理、变送器的选择方法及闭环控制系统主要性能指标进行了描述,介绍了PID控制器的数字化过程及PID指令向导生成PID程序的步骤,通过S7-200 SMART PLC编程实现该控制过程,并进行了参数整定,达到了控制效果。     

时变源作用下介观LC电路系统量子态的演化

采用代数动力学规范变换方法,求出含时变电压源的介观LC电路量子态随时间演化算符的精确解,研究含时变电压源的介观LC电路量子态的相干特性.结果表明,电路中电容器储电量q的几率是一个运动的Gauss波包,导出波包中心电量与外电源的一般关系.研究了输入电压源为单矩形脉冲电压的特例.     

大规模集成芯片IR2130触发器

详述了芯片内各环节的工作原理及所起作用,阐释了电路悬浮的工作情况,结合逆变器主回路,给出整个触发系统的电路框图,特别是对各个保护环节做出了深入的分析。虽未涉及芯片的具体应用,却为应用提供了坚实的理论基础,为全面掌握本芯片提供了可能性。