基于51单片机恒压恒流源的设计

本文基于宁东直流输电工程的实际设备的数据,在PSCAD/EMTDC中建立了包含换流器、换流变压器、直流滤波器、交流滤波器和无功补偿设备、平波电抗器以及直流输电线路的模型,并按照CIGRE直流输电系统基准模型的典型控制方式,建立了初步的直流输电三级控制结构,并分析了控制逻辑中PI环节参数的选择问题：基于BPA仿真模型中的元件模型与参数,在PSCAD/EMTDC中建立了山东电网500kV动态等值之后的交流系统模型,包括发电机、励磁机、调速器、电力系统稳定器、变压器、负荷以及输电线路等设备的模型,利用PSCAD/EMTDC自定义开发功能,用C语言开发了励磁系统自定义饱和模块。(Based on the data of the actual device Ningdong HVDC projects established comprising converter, converter transformers, DC filters, AC filter and reactive compensation devices, smoothing reactors and DC transmission line in PSCAD/EMTDC in the model and follow the typical control mode CIGRE HVDC system reference model, the establishment of a preliminary three HVDC control structure, and analyze the selection control logic PI link parameters: BPA-based simulation model component model and parameters in PSCAD/EMTDC established a dynamic equivalence Shandong power grid after the 500kV AC system model, including the model generator, exciter, governor, power system stabilizer, transformers, load and power transmission lines and other equipment, the use of PSCAD/EMTDC custom development capabilities, using C language to develop custom saturation block the excitation system.)

大多数自行车速度表工作通过使用霍尔效应传感器固定在自行车前叉。磁铁是附加到前轮上的辐条之一,它将与霍尔效应开关一次革命的车轮。速度计监测传感器计数轮革命。如果知道车轮的直径,距离可以很容易地计算如果你知道有多少革命的车轮。此外,如果时间完成革命,平均速度也可以计算出来。 对于这个问题,您将编写一个程序来确定总距离(英里)和平均速度(英里每小时)考虑到车轮直径,革命的数量和总时间的旅行。你可以假定前轮从未离开地面,并没有下滑或打滑。(Most bicycle speedometers work by using a Hall Effect sensor fastened to the front fork of the bicycle. A magnet is attached to one of the spokes on the front wheel so that it will line up with the Hall Effect switch once per revolution of the wheel. The speedometer monitors the sensor to count wheel revolutions. If the diameter of the wheel is known, the distance traveled can be easily be calculated if you know how many revolutions the wheel has made. In addition, if the time it takes to complete the revolutions is known, the average speed can also be calculated. For this problem, you will write a program to determine the total distance traveled (in miles) and the average speed (in Miles Per Hour) given the wheel diameter, the number of revolutions and the total time of the trip. You can assume that the front wheel never leaves the ground, and there is no slipping or skidding.)

基于28335的移相程序，可以生成4组不同相位的互补的PWM波，从而可以实现开关电源的移相位操作(A phase shift program for 28335)

c8051f340移植uCOS_II ,单片机移植uCos(c8051f340 transplant uCOS_II ，mcu transplant uCOS_II)

液晶例程， 包括画点画线画缓冲条，在液晶上printf的算法(LCD program world，you can study LCD draw points )

说明：  关于freescale单片机S12/S12X系列的串口bootloader，资料是freescale代理给的，很有参考价值，使用codewarrior 5.1编译环境，C语言编写，便于移植和改写！(This is a S12/S12X serial bootloader on the Freescale microcontroller based on CodeWarrior 5.1 compiler environment, Freescale agent given to me, it's very valuable reference . profit from C language, it's easy to be transplanted and rewrite!)

串行驱动led显示( Serial actuates led to demonstrate )

STM32控制无刷电机源码，直接用寄存器控制的版本.(BLDC Control by STM32)

有限差分波动方程不加边界条件二阶正演时间切片程序。(Finite difference wave equation without boundary conditions of second-order forward time-slicing procedure.)

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