无轴承无刷直流电机结构设计 摘要：
目前研究的无轴承电机均是将电机和转子悬浮磁路合为一体，两个磁场的叠加一方面容易造成磁饱和，使电机的承载能力下降，影响电机的稳定悬浮；另一方面电磁转矩与径向悬浮力之间具有很强的非线性耦合，而实现解耦控制是非常复杂的。将无刷直流电机的优点与磁悬浮轴承的优点结合，提出一种六自由度可控的无轴承无刷直流电动机结构，通过研究其悬浮原理和运行原理，建立了转子偏心时的精确数学模型和PWM（脉宽调制）调速的精确数学模型，经仿真测试，表明了这种电机结构的合理性。主要特点是承载能力高且电磁转矩控制与径向悬浮力的控制相互独立，无需复杂的非线性解耦控制。
关键词：无轴承无刷直流电机；结构；模型；六个自由度可控；PWM
目录
摘 要·····························································3
Abstract····························································3
绪论························································4
1.1 无刷直流电机的研究意义和概况···································4
1.2 电机控制系统现状和发展········································6
1.3 无位置传感器检测技术概述·······································7
1.4 论文的提出及内容的安排········································9
第二章 无轴承无刷直流电机的结构设计及原理··························9
2.1 引言··························································9
2.2 无轴承无刷直流电机的组成及原理································10
2.3 无轴承无刷直流电机的总体结构设计······························18
2.4 无轴承无刷直流电机的主要零部件的结构设计······················19
第三章 磁悬浮轴承的工作原理及数学建模····························24
3.1 引言··························································24
3.2 无轴承无刷直流电机的悬浮原理··································25
3.3 数学模型······················································26
3.4 控制系统仿真分析··············································29
3.5 小结··························································30
第四章 结论与展望················································31
参 考 文 献·······················································31
致 谢 ···························································33
参 考 文 献
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