英语翻译摘要单片机控制的永磁无刷直流电动机调速系统适用于电动自行车等小功率工作情况.因为它与传统的有刷直流电动机相比具有

英语翻译
摘要
单片机控制的永磁无刷直流电动机调速系统适用于电动自行车等小功率工作情况.因为它与传统的有刷直流电动机相比具有以下的优势：寿命长、免维护、可靠性高.
本论文主要从系统要求分析入手,将整个系统分成四个部分,分析和讨论了各个部分的电路原理、控制策略、实现方法.详细讨论了系统的各种工况及信号的传递情况,并得到了系统各个部分在不同工况的工作状态.系统各个部分的控制电路基于Intel公司的控制芯片8051单片机.根据永磁无刷直流电动机的特性实施脉宽PWM控制,并通过转速传感器测量转速通过八段数码管动态显示转速,通过软硬件的配合,实现整个系统的设计要求.
关键词：单片机、 电动自行车、 脉宽调速系统、 八段数码管动态显示、
\x05永磁无刷电动机

Abstract
The microprocessor controlled brushless DC motor speed control system for electric bicycles and other small power. Because it is compared with the traditional brush DC motor has the following advantages: long life, maintenance-free, high reliability.
This thesis from the system requirements analysis to start with, the whole system is divided into four parts, to analyze and discuss the various parts of the circuit theory, control strategy implementation. Discussed in detail a variety of conditions and signal transduction, and the working status of various parts of the system in different working conditions. Various parts of the system control circuit control chip based on Intel's 8051. Pulse width of the PWM control, implemented according to the characteristics of permanent magnet brushless DC motor and speed sensor measuring speed dynamic eight out digital tube display speed, hardware and software with the entire system design requirements.
Keywords: microcontroller, electric bicycles, PWM System, eight out of digital pipe dynamic show
Permanent magnet brushless moto