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目 录
摘 要 ...................................................................................................................................I
ABSTRACT .......................................................................................................................II
1 绪论.................................................................................................................................1
1.1 目的和意义..........................................................................................................1
1.2 课题背景..............................................................................................................1
1.3 国内外发展状况..................................................................................................1
1.4 纸机的类型及工艺流程......................................................................................2
1.5 本设计的主要任务..............................................................................................4
2 变频调速基础知识.........................................................................................................5
2.1 变频器..................................................................................................................5
2.1.1 变频器基础原理知识...............................................................................5
2.1.2 变频器的组成和分类...............................................................................5
2.1.3 变频器工作原理.......................................................................................6
2.1.4 变频器功能与控制方式...........................................................................6
2.2 ACS550 系列变频器............................................................................................7
2.2.1 ACS550 变频装置的组成和功能.............................................................7
2.2.2 ACS550 的构成及功能.............................................................................8
2.2.3 ACS550 的功能描述.................................................................................8
3 变频调速和直接转矩控制...........................................................................................11
3.1 变频调速............................................................................................................11
3.1.1 变频传动系统的发展.............................................................................11
3.1.2 变频调速系统的组成及原理.................................................................11
3.1.3 变频调速的优点.....................................................................................13
3.1.4 变频调速系统的性能指标.....................................................................14
3.2 直接转矩控制变频器原理................................................................................15
3.2.1 直接转矩控制的主要特点.....................................................................15
3.2.2 直接转矩控制工作原理.........................................................................15
3.2.3 直接转矩控制的实现和系统结构.........................................................16
3.3 脉宽调试变频器工作原理................................................................................17
4 系统设计.......................................................................................................................19
4.1 系统设计要求.....................................................................................................19
4.1.1 硬件设计的依据.....................................................................................19
4.1.2 系统原件的布置及负荷分配.................................................................20