电动自行车调速系统的设计
目录
摘要………………………………………………..…..……..2
1、引言……………………………………………………….2
2、系统要求………………………………………………….3
3、总体规划…………………………………………….….…4
4、电路设计………………………………………………….5
5、主要器件性能及原理…………………………………….12
5、1 MCS-51单片机内部结构………………………  …………………….…12
5、2 A/D转换芯片………………………………………………….…………..16
5、3 永磁无刷直流电动机………………………………………….………….18
5、4 三端式稳压器78L05………………………………………….…………..21
5、5 集成转速传感器KMI15-1…………………………………………..…….25
5、6 译码器………………………………..………………………….…………29
6、程序设计…………………………………………….……31
6、1程序框图…………………………………………………….………..……31
6、2部分子程序………………………………………………….………..……32
7、结束语…………………………………………..…..….…35
8、致谢…………………………………………………….…35
参考文献………55
 abstract: The of the single a machine control has no to brush the direct current motive adjusts soon the system is applicable to the work circumstance that electricity move small power in etc. in bicycle. Combining can return the superfluous electric power  This system possesses the advantage of good experimental characteristic, high power factor ,energy-saving ,small volume、etc.

      This paper debates the circuit principle, control method and realization method of into four parts. At the same time, the work condition of every part and the energy transmission direction are discussed .The control circuits of the system are based on Intel company 2051 The single a machine .The system by cooperating the hardware and software harmoniously, according to the feature of the experimental motor.

Key words: The single a machine, vein breadth adjusts soon the system PWM, eight figureses tube development manifestation and turn to spreads to feel soon machine55

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