3.2.2 六拍阶梯波逆变器与正六边形空间旋转磁场..............................................................35
3.2.3 圆形磁链轨迹的跟踪控制...............................................................................................37
3.2.4 磁链模型...........................................................................................................................39
3.2.5 扇区的判断.......................................................................................................................39
3.3 转矩控制......................................................................................................................................39
3.3.1 转矩的控制理论...............................................................................................................39
3.3.2 转矩模型...........................................................................................................................42
3.4 励磁电流及功率因数控制..........................................................................................................45
3.4.1 励磁电流的期望值...........................................................................................................45
3.4.2 励磁电流控制...................................................................................................................46
3.5 凸极同步电动机直接转矩控制系统仿真结果..........................................................................46
3.5.1 仿真所选的凸极同步电机参数.......................................................................................46
3.5.2 仿真系统的组成...............................................................................................................47
3.5.3 凸极同步电动机直接转矩控制系统的仿真结果..........................................................48
4 ACS6000sd 传动系统.............................................................................................................................52
4.1 脉宽调制整流器..........................................................................................................................52
4.1.1 单元电路...........................................................................................................................52
4.1.2 整流器直流电压控制原理...............................................................................................56
4.2 励磁整流装置(EXU)..............................................................................................................57
4.2.1 主电路...............................................................................................................................57
4.2.2 电流控制电路...................................................................................................................57
4.2.3 故障检测与保护...............................................................................................................58
4.3 逆变器(INU)...........................................................................................................................59
4.3.1 单元电路...........................................................................................................................59
4.4 速度给定与控制..........................................................................................................................60
4.4.1 速度给定...........................................................................................................................60
4.4.2 速度控制...........................................................................................................................67
4.5 整流变压器容器..........................................................................................................................71
附图............................................................................................................................................73
5 传动系统的操作电路.............................................................................................................................86
5.1 整流电路的操作方式..................................................................................................................86
5.2 启动操作......................................................................................................................................86
5.3 停机操作......................................................................................................................................87
5.4 紧急断电操作..............................................................................................................................88
5.5 硬件操作电路..............................................................................................................................89
5.5.1 主断路器合闸操作...........................................................................................................89
5.5.2 主断路器分闸操作...........................................................................................................90
5.5.3 紧急停车与复位操作.......................................................................................................91
5.5.4 紧急断电与复位操作.......................................................................................................92
5.5.5 励磁接触器分闸电路.......................................................................................................93
6 故障分析与维护.....................................................................................................................................94
6.1 故障分析......................................................................................................................................95
6.1.1 概述...................................................................................................................................95
6.1.2 故障分类(FAULT CLASS).........................................................................................95
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