一种小型漏电断路器产品的优化设计

对灭弧系统及电子组件板进行改进设计,灭弧室采用左右交错排列多栅片,喷弧口采用多层网状栅片,引弧片采用大弧度的结构,在触头系统部分增设两个导磁板以及新型聚合材料的隔弧板,分析了为达到设计指标而采取的方案措施。该产品的各项性能指标都达到了设计要求,市场反应良好,成为性价比较高的新一代小型漏电断路器。     

基于物联网远程监控的太阳能定向跟踪系统设计*

设计了一种基于物联网远程监控的太阳能定向跟踪系统,分别对太阳能定向跟踪系统本体和远程监控系统进行了设计与开发,采用离线和实时控制两种方式,通过监控数据计算当前的太阳高度角和方位角,调整光伏板的倾角,从而提高太阳能光伏板的发电率。对该装置设备层的太阳能定向跟踪系统本体采用框架式结构设计,并通过模糊PID算法对跟踪装置电机进行调控;对应用层的远程监控系统采用B/S架构设计,使用MQTT协议与云平台进行数据交互,用户可直接通过浏览器访问监控系统,实现太阳能定向跟踪系统的远程状态检测、实时控制、数据管理等功能。经测试,用户能通过该监控系统控制和监控太阳能定向跟踪系统的运行,满足太阳能定向跟踪系统远程监控的要求,系统具有较高的实用性。     

一种航控板故障检测系统的设计与实现

针对传统的采用万用表检测航控板故障存在种种弊端,设计了一种基于虚拟仪器技术、LabVIEW的软件平台的航控板的故障检测系统。本系统采用M的PXI板卡,采用状态机的设计思想编制了主程序,程序构架由上向下,分层编制。并利用数据库、LabSQL等方法实现了引脚连接查询、数据分析。人机界面可实现结果动态刷新显示、存储及打印测量结果。实现了航控板故障检测自动化、可视化。应用表明,本系统可快速检测出航控板的故障点,检测结果准确、可靠,具有较广泛的应用前景。     

基于Compact PCI／PSB总线的冗余系统设计

基于PSB（Packet Switching Board）术,设计了Compact PCI高可靠性硬件平台。该系统内的任意板卡都可以通过PSB实现数据的交换,并利用主控CPU板卡对其数据包进行侦测。系统平台可以对包括主系统板的所有插件提供冗余备份,故障板可以被自动隔离,备份件可以被自动连接,可以在线插拔系统板及其它插件。由于采用热备冗余设计具备高可靠性,在现代通信、航天、军事等领域具有广阔的应用前景。     

基于单片机的配电火灾报警系统设计

本文针对低压配电火灾报警系统进行设计,采用STC89C52单片机与NRF24L01无线通信模块为核心,实现对烟雾、温度的检测。硬件部分设计了主控电路、液晶显示、传感器、电源模块等主要模块。软件部分设计了消防报警系统中会出现的流程图。最后绘制系统PCB板,并且利用keil软件进行了系统的的仿真,仿真结果能够实现消防报警功能。     

太阳电池板智能追踪在移动基站中的应用

为提高野外移动基站太阳电池板的转化效率,采用视日运动轨迹和光敏电阻阵列追踪方式设计了太阳电池板智能追踪系统,系统主要由集中监控中心、太阳电池板控制器和传输网络组成。太阳电池板控制器采用DSP处理器TMS320F2812作为运算和控制核心,通过GPS模块获取当地的纬度和时钟信息,协调完成太阳光线角度的运算,来控制水平和垂直方向的步进电机调整太阳电池板的角度,再经过光敏电阻阵列进行微调,使太阳光与太阳电池板保持垂直。太阳电池板的输出电流、电量和角度状态等信息会通过建立的TCP/IP网络连接传输到监控中心主机上。经6个小时日照实验表明,该系统比太阳能固定电池板能量转化效率提高了10.84%,为野外的移动基站供电提供了可靠保障。     

基于FPDP和VME总线的多DSP通用并行处理系统设计

多信号处理板多处理器系统已经广泛应用于高速信号处理领域。多处理器的结构和子板间的数据传输速度是系统设计的难点。本文具体介绍一种双总线的高速信号处理多子板结构系统。基于VME总线的高可靠性以及FPDP总线的高速传输能力,系统采用VME总线完成板间程序下载,采用FPDP总线完成板间数据传输。并且提出一主三从的多处理器结构,增强了系统的重组性和扩展性。文中详细讨论了该系统中多DSP通用并行处理机的硬件设计,并就系统结构和供电方案给出原理框图。     

悬挂运动控制系统的设计

本文描述了悬挂运动控制系统的设计原理和实现方法。该系统由51单片机控制,通过液晶屏和键盘与操作人交互,通过步进电机对悬挂载荷进行开环运动控制,采用安装于悬挂载荷的反射式红外光电传感器阵列提供的反馈,对面板上给定曲线进行闭环跟踪。系统最大特点在于其软件设计使用层次化、模块化设计方法,因此得以简化和快速开发。经调试和测试,系统各项性能参数完全达到设计指标。     

悬挂运动控制系统的设计

本文描述了悬挂运动控制系统的设计原理和实现方法。该系统由51单片机控制，通过液晶屏和键盘与操作人交互，通过步进电机对悬挂载荷进行开环运动控制，采用安装于悬挂载荷的反射式红外光电传感器阵列提供的反馈，对面板上给定曲线进行闭环跟踪。系统最大特点在于其软件设计使用层次化、模块化设计方法，因此得以简化和快速开发。经调试和测试，系统各项性能参数完全达到设计指标。     

袋式除尘设备气流分布的数值模拟

烟气进入袋式除尘设备时的分布状况是影响除尘效率和滤袋寿命的关键因素之一,在袋式除尘设备的进气烟箱中放置气流分布板是改善气流分布的有效方法。为了对除尘设备的气流分布板设计提供合理的参数,文中应用Fluent数值模拟软件对除尘设备进气烟箱放置气流分布板前后气固多相流的分布情况进行了数值模拟,采用k-ε湍流模型模拟气相流动,采用Lagrange法来计算颗粒场特性。模拟结果表明,放置气流分布板后的气流分布情况明显优于未放置之前,气流分布较为均匀。如果合理布置气流分布板的位置、孔径和开孔率,可以为除尘系统气流分布的设计提供最佳的方案。利用数值模拟可以有效地缩短设计过程,避免气流分布模拟试验台因设备不同而不能重复使用造成的浪费,减少了产品开发成本。     

A real-time control platform for rapid prototyping of induction motor vector control

This paper presents a real-time control platform developed for rapid prototyping of an induction motor (IM) vector control. Firstly, the control system is designed with the Simulink in the form of user-friendly block-diagrams. Next, c-codes are automatically generated from the block-diagrams with the real-time workshop. And lastly, an executable code, produced from the c-codes through a DSP c-compiler, is downloaded into a target DSP board. With this automatic programming scheme rapid prototyping is realized with the least low-level handwork programming. Presented control platform has been evaluated through the rapid prototyping of a voltage source inverter-fed IM driver and some experiments have been carried out to show its effectiveness.     

微型数控铣床开发平台运动控制卡的设计

根据开放式系统的设计理念,开发了微型数控铣床的运动控制卡系统。首先,对运动控制卡的功能及硬件结构进行详细设计;然后,根据功能需求将控制卡分成DSP系统、主轴电动机控制系统、XYZ轴步进控制系统及双端口RAM通讯系统进行详细设计;最后,根据设计原理完成控制卡的PCB图和电路板的设计加工调试工作。该运动控制卡已在微型数控铣床开发平台上实验成功,其设计方法对今后运动控制系统的设计具有较高的参考价值。     

异步电机柔性控制系统

近年来,随着计算机及数字信号处理器技术的发展,异步机的全经控制已步入成熟阶段。     

Rotor field oriented control strategy with harmonic currents closed-loop control for five-phase induction motor

In order to solve the problems of harmonic currents in the conventional vector control of multiphase induction motor, the rotor field oriented control (RFOC) strategy with harmonic current closed-loop control is proposed in the paper. Based on the transform theory of the multiphase system and the RFOC strategy of three-phase induction motor, the mathematical modulation of RFOC for five-phase induction motor is modeled. The fundamental current and the second order harmonic current can be controlled independently after being decoupled. The proposed strategy is implemented with a board microcomputer that uses TMS320F28335 DSP. The experimental results show that the proposed RFOC strategy with harmonic current closed-loop control has outstanding dynamic and static performance.     

系统级DSP电机控制器开发平台

现成的印刷电路板，内装的BIOS软件，视窗式的电脑编程，调试，波形显示软件以及程序库等，能加速DSP电机控制器的开发，为广大DSP应用开发人员提供了极为方便的开发平台，为DSP应用也节省大量的时间和精力。     

基于数字信号处理器的直接转矩控制技术的实现

文章介绍了三项异步电动机直接转矩控制技术中一些关键模块的新型实现方法，其中详细叙述了一种根据电压区段空间几何特性估计定子磁链位置的新方法，还介绍了一些简化计算的方法。该方法在基于TITMS320F240数字信号处理器的实验系统上得到实现，实验结果表明，该方法简化了运算，控制效果良好。     

Simplified fuzzy-logic-based MTPA speed control of IPMSM drive

This paper presents a simplified fuzzy-logic-based speed controller of an interior permanent-magnet synchronous motor (IPMSM) drive for maximum torque per ampere (MTPA) of stator current with inherent nonlinearities of the motor. The fundamentals of fuzzy logic algorithms as related to motor control applications are illustrated. A simplified fuzzy speed controller for the IPMSM drive has been found to maintain high performance standards with a much simpler and less computation-intensive implementation than a nonsimplified fuzzy-based algorithm. Contrary to the conventional control of IPMSM with d-axis current equal to zero, a nonlinear expression of d-axis current has been derived and subsequently incorporated in the control algorithm for maximum torque operation. The efficacy of the proposed simplified fuzzy-logic-controller (FLC)-based IPMSM drive with MTPA is verified by simulation as well as experimentally at dynamic operating conditions. The simplified FLC with MTPA is found to be robust for applications in IPMSM drives. The complete vector control scheme is implemented in real-time using a digital signal processor (DSP) controller board DS 1102 in a laboratory 1-hp IPM synchronous motor.     

On-line efficiency optimization of a synchronous reluctance motor

This paper deals with an on-line optimum-efficiency control of a synchronous reluctance motor drive. The input power minimization control is implemented with a search controller using Fibonacci search algorithm. It searches the optimal reference value of the d-axis stator current for which the input power is minimum. The input power is calculated from the measured dc-bus current and dc-bus voltage of the inverter. A rotor-oriented vector control of the synchronous reluctance machine with the optimization efficiency controller is achieved with a DSP board (TMS302C31). Experimental results are presented to validate the proposed control methods. It is shown that stability problems can appear during the search process.     

A DSP-based modified slip energy recovery drive using a 12-pulse converter and shunt chopper for a speed control system of a wound rotor induction motor

This paper introduces a modified slip energy recovery drive system for speed control of a wound rotor induction motor offering improvement of drive performance, particularly line power factor and overall system efficiency. A 12-pulse line commutated thyristor converter operating in an inverter mode in conjunction with an additional IGBT shunt chopper is employed to transfer slip energy back to ac mains supply via three phase transformers. This approach offers motor speed control by varying the duty cycle of the chopper instead of changing the inverter firing angle. As a consequence, supply power factor can be improved. The servo state feedback designed by linear quadratic regulator (LQR) with observer is also included in order to keep motor speed to be constant over a certain range of operating conditions by using the estimated dc link current derived from motor speed. The advantage of this technique is absence of current transducers for current feedback control loop. The overall control system is implemented on DSP, DS1104’TMS320F240 controller board. Experimental results are illustrated in order to validate performance of the proposed system.     

单相桥式逆变器SPWM目标代码自动生成研究

提出了一种基十Matlab/RTW的系统设计方法和开发流程.结合该集成一体化的摔制平台,提出了一种基于嵌入式目标代码生成工具的单相桥式逆变器SPWM波产牛方法.利用Matlab/Simulink工具建立算法模型,经仿真验证算法后.给出了以TMS320F2812型定点DSP为目标的SPWM控制模型,并自动牛成代码,编译、下载到目标DSP中运行.产生的波形与理论吻合.这种基于模型的设计流程,实现了工程开发过程从算法设计到最终实现的所有阶段,从而提高了产品开发效率,降低了开发成本.