JX007電動自行車調速系統(tǒng)的設計,jx007,電動自行車,調速,系統(tǒng),設計 摘 要 單片機控制的永磁無刷直流電動機調速系統(tǒng)適用于電動自行車等小功率的工作情況。并能將多余的電能回潰。該系統(tǒng)具有調速性能好、功率因數高、節(jié)能、體積小、重量輕等優(yōu)點。 本文從系統(tǒng)要求分析入手，將整個系統(tǒng)分成四個部分，分析和討論了各個部分的電路原理、控制策略、實現方法。詳細討論了系統(tǒng)的各種工況及信號的傳遞情況，并得到了系統(tǒng)各個部分在不同工況的工作狀態(tài)。系統(tǒng)各部分的控制電路基于Intel公司的控制芯片8051單片機。根據永磁無刷直流電動機的特性實施脈寬PWM控制，并通過轉速傳感器測量轉速通過八段數碼管動態(tài)顯示轉速，通過軟硬件的配合，實現了整個系統(tǒng)的設計要求。本文主要是讓更多的人正確的認識電動自行車和對電動自行車的主要器件的保養(yǎng)，便與延長電動自行車的壽命。 關鍵詞：單片機、脈寬調速系統(tǒng)PWM、永磁無刷直流電動機、八段數碼管動態(tài)顯示、轉速傳感器，蓄電池 Abstract SCM control of permanent magnet brushless DC motor speed control system applicable to electric bicycles, and other low-power work. Redundant power and can return to collapse. The system has good speed performance, high power factor, energy saving, small size, light weight, and other advantages. This paper analyzes the requirements from the system, the whole system will be divided into four parts, analysis and discussion of the various parts of the circuit of the control strategy, implementation method. Discussed in detail the status of the various systems and signal transduction, and have the system in different parts of the state the status of the work. Part of the system control circuit based on Intel's 8051 chip microcontroller. According to the permanent magnet brushless DC motor control of the PWM pulse width, speed sensor and passed through eighth speed digital dynamic display of speed, through hardware and software support, for the entire system design requirements. This paper is designed to allow more people to the correct understanding of electric bicycles, and electric bicycles on the main device maintenance, and would extend the life of electric bicycles. ???Key words: SCM, PWM pulse speed control system, permanent magnet brushless DC motor, the eighth of digital dynamic display, speed sensor, battery