TQFP-44-LQFP-44-package-library

说明：  正点原子STM32F103精英板跑马灯例程(Punctual Atomic STM32F103 Elite Board Horselight Routine)

EVERLIGHT ELECTRONICS el817 DATA SHEET

相比于传统使用的电机，永磁同步电动机（PMSM）具有着比较高的工作效率、比较高的力矩惯量比、比较高的能量密度和环保节能等优越特性，所以对永磁同步电机进行控制调速方面的研究有着相当重要的意义。我们设定电机转速初始值作为给定值，然后与反馈的实际值进行比较，得到的差值输入PI控制器进行控制，得到交轴电流。同时三相绕组输出的电流经过clarke变换和park变化得到电流的实际值，分别与给定值进行比较，将比较后的值再进行park转换，得到的结果经过SVPWM技术调制之后输入到逆变器，继而可以驱动三相电机。(Used compared to traditional motor, permanent magnet synchronous motor (all-digital fuzzy) has a higher efficiency, higher moment of inertia ratio, higher energy density and superior properties such as environmental protection and energy saving, so the control of permanent magnet synchronous motor speed regulation research has important significance. We set the initial value of motor speed as the given value, and then compare it with the actual value of feedback. The difference obtained is input to PI controller for control, and the current of crossaxis is obtained. At the same time the output three-phase winding current through Clarke transformation and park changes the current actual value, compared with a given value respectively, after comparing the value of the park transformation again, the result after SVPWM modulation technology input to the inverter, which in turn can drive three-phase motor.)

该源程序的功能是设计一个时钟，时钟精度还可以，这是单片机学习的一个进阶吧，掌握了它，也算是对单片机有比较熟练的应用了，加油(The source function is to design a clock, clock accuracy can be, this is an advanced single-chip learning it, grasp it, can be considered a relatively skilled microcontroller applications, the refueling)

大整数阶乘新思路，实现了大整数阶乘的程序(Large integer factorial new ideas, the realization of a large integer factorial process)

多功能电子钟的程序，基于ATM89C51单片机，可以实现时间走动、显示、日期显示、闹铃功能，欢迎下载(The program of multi-function electronic clock, based on ATM89C51 single chip computer, can realize the functions of time walking, display, date display and alarm. Welcome to download.)

说明：  单片机控制密码锁，四位密码，可更改密码。(cipher trunk using AT89C51)

说明：  基于51单片机的继电器例程，常见问题： 1. 按下按键无效果 确保连线正确 换根杜邦线试试 将单片机拆下来重新安装下，重启开发板(Relay Routine Based on 51 Single Chip Microcomputer, Frequently Asked Questions: 1. Pressing the key has no effect Make sure the connection is correct Try changing the dobang line Remove the microcontroller and reinstall it, restart the development board.)

this file is manual about rs-485

功放机的遥控飞梭按键测试程序程序简单流程清晰(Amplifier machine button remote control Shuttle test procedure simple process clear)