down-soft-20140426-000004

中频感应加热以其加热效率高、速度快，可控性好及易于实现机械化、自动化等优点，已在熔炼、铸造、弯管、热锻、焊接和表面热处理等行业得到广泛的应用。 本设计根据设计任务进行了方案设计，设计了相应的硬件电路，研制了20KW中频感应加热电源。 本设计中感应加热电源采用IGBT作为开关器件，可工作在10 Hz～10 kHz频段。它由整流器、滤波器、和逆变器组成。整流器采用不可控三相全桥式整流电路。滤波器采用两个电解电容和一个电感组成Ⅱ型滤波器滤波和无源功率因数校正。逆变器主要由PWM控制器SG3525A控制四个IGBT的开通和关断，实现DC-AC的转换。 设计中采用的芯片主要是PWM控制器SG3525A和光耦合驱动电路HCPL-316J。设计过程中程充分利用了SG3525A的控制性能，具有宽的可调工作频率，死区时间可调，具有输入欠电压锁定功能和双路输出电流。由于HCPL-316J具有快的开关速度（500ns），光隔离，故障状态反馈，可配置自动复位、自动关闭等功能，所以选择其作为IGBT的驱动。 对原理样机的调试结果表明，所完成的设计实现了设计任务规定的基本功能。此外，为了满足不同器件对功率需要的要求，设计了功率可调。这部分超出了设计任务书规定的任务。(induction heating with high heating efficiency, speed and good controllability and easy to mechanization. the advantages of automation, in melting, casting, bending, forging, welding and surface heat treatment and other industries have been widely employed. According to the design tasks for the design of the program design, design corresponding to the hardware circuit, Development of 20 KW induction heating power. The design of induction heating power IGBT used as a switching device, which can work in 10 Hz- 10 kHz frequency band. It consists of rectifier, filter, and the inverter components. Controlled Rectifier not use the entire three-phase bridge rectifier circuit. 2 filter used an electrolytic capacitor and inductor components II-type filter and passive PFC. Inverter mainly by the PW)

桌面系统下的一个小播放器,可以播放多种格式的媒体文件,测试可用.(Desktop systems to a smaller player, can play multiple formats of media files, testing can be used.)

连接小区质心点到道路网上，可选数目的线段连接。Mapbasic源码。(Connect the central point of TAZ to Road network.)

这是一套GPS定位采集程序，可用于卫星天线乏味俯仰角的计算(This is a set of GPS positioning acquisition procedures can be used for satellite antenna pitch angle tedious calculation)

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a program that represents an input color image with given English character set

基于VC的向导程序示例，用于程序打包安装、用户协议查看浏览、程序分步处理等场合，示例虽然小，但挺实用的，有一定参考性。(VC' s wizard-based example, for program installation package, the user agreement see here, the program step processing and other occasions, the sample was small, but very useful, has some reference to sex.)

此程序主要是为了完成图形的上下左右的移动、缩小和放大。(This procedure is to complete the graphics up and down around Mobile, narrow and amplification.)

倒计时设计 单片机 武汉理工大学 课程设计 (daojishi)

采用Visio Studio编译生成动态链接库，嵌入Psim进行仿真。仿真模型提供了半桥谐振变换器的数模混合仿真，有动态链接库实现PWM的分配。(Visio Studio is used to compile and generate dynamic link libraries, which are embedded in Psim for simulation. The simulation model provides digital-analog hybrid simulation of half-bridge resonant converter, with dynamic link library to realize PWM allocation.)