直流无刷电机电调设计全攻略

无感无刷直流电机之

电调设计全攻略

前 言..............................................................................................................................................1

1. 无刷直流电机基础知识..............................................................................................................2

1.1 三个基本定则....................................................................................................................2

1. 左手定则......................................................................................................................2

2. 右手定则（安培定则一）..........................................................................................3

3. 右手螺旋定则（安培定则二）..................................................................................3

1.2 内转子无刷直流电机的工作原理....................................................................................3

1. 磁回路分析法.............................................................................................................4

2. 三相二极内转子电机结构..........................................................................................5

3. 三相多绕组多极内转子电机的结构..........................................................................7

1.3外转子无刷直流电机的工作原理.....................................................................................8

1. 一般外转子无刷直流电机的结构..............................................................................8

2. 新西达2212外转子电机的结构................................................................................8

1.4 无刷直流电机转矩的理论分析......................................................................................14

1. 传统的无刷电机绕组结构........................................................................................14

2. 转子磁场的分布情况................................................................................................15

3. 转子的受力分析........................................................................................................16

4. 一种近似分析模型....................................................................................................18

1.5 换相与调速......................................................................................................................19

1. 换相基本原理............................................................................................................19

2. 新西达2212电机的换相分析..................................................................................24

3. 调速............................................................................................................................28

2. 无感无刷电调的驱动电路设计................................................................................................30

2.1 电池电压监测电路..........................................................................................................30

2.2 换相控制电路..................................................................................................................30

1. 六臂全桥驱动电路原理............................................................................................31

2. 功率场效应管的选择................................................................................................33

2.3 电流检测电路..................................................................................................................45

2.4 反电势过零检测电路......................................................................................................49

2.5 制作你自己的电调线路板..............................................................................................50

3. 无感无刷电调的软件设计........................................................................................................52

3.1 电流检测..........................................................................................................................52

3.2 定时器延时与PWM信号................................................................................................53

1. 定时器初始化............................................................................................................54

2. 定时器T0的溢出中断服务程序..............................................................................54

3. 利用T0延时（毫秒极）..........................................................................................54

4. 利用T0延时（微秒极）..........................................................................................55

5. PWM信号的产生.....................................................................................................55

3.3 过零事件检测与电机换相..............................................................................................56

1. BLMC.h中定义的宏................................................................................................56

2. 过零检测与换相代码分析.......................................................................................59

3.4 启动算法..........................................................................................................................63

1. 函数Anwerfen启动流程分析....................................................................................63

2. 启动算法机理探究....................................................................................................65

3.5 上电时的MOSFET自检..................................................................................................68

1. 函数Delay和DelayM.................................................................................................68

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