标题: 直接转矩控制在感应马达上的应用
Application of Induction Motor to Direct Torque Control
作者: 褚柏森
Bor-Sen Chu
林錫寬
Shir-Kuan Lin
電控工程研究所
关键字: 位置控制器;降阶磁通观测器;直接转矩控制器;顺滑模态;MRAC;DSP
公开日期: 2000
摘要: 直接转矩控制是以转矩与磁通量作为输入命令的一种方法,经由控制器之运算可直接地求出符合命令所需之电压向量。本论文将利用顺滑模态控制技术,针对交流感应马达模型设计一顺滑模态控制器以直接控制转子转矩与磁通振幅平方值使其达到所期望之值。于此将选定一非线性之顺滑平面,并设计出马达定子之参考电压,以使系统状态轨迹能产生顺滑模态之行为,以达控制目的。
而由于感应马达实际之转子磁通难以估测,因此使用一降阶磁通观测器以估测其值。此外,利用适应控制中的方法、MRAC( Model Reference Adaptive Control )法则设计一MRAC位置控制器做为外部回路以达成转子之角度控制,并产生参考转矩至顺滑模态控制器。
在本论文中将以C语言建立模拟架构以进行电脑模拟。并以个人电脑为基础,建构两种实验系统:第一种是由电脑配合周边介面卡建置而成(PC-based)。第二种是由电脑配合DSP数位控制板建置而成(PC+DSP)。经由实验结果验证理论之可行性,以及软体与硬体设计之正确性。
Direct Torque Control is to use torque and flux magnitude as input commands in the controller, which calculates the voltage vectors for the motor.In this thesis, we deal with the problem of using sliding mode technique to control and observe the states of an induction motor. We hope to directly regulate the rotor torque and the square of the rotor flux magnitude to the desired value. Nonlinear sliding surfaces are chosen and stator voltages are derived such that the state trajectories have a sliding mode behavior for the driving system to achieve the control objective.
Because of the rotor fluxes are hard to measure in practice, the reduced order observer is used to estimate the rotor fluxes. Besides, the adaptive MRAC law will be also applied in position tracking control.
The simulations of the control structure are implemented by
C language. The experimental tools will be divided to two structures. One is built by PC and some interface cards. The other is built by PC and the DSP digital board. The results of simulations and experiments verify the validity and practice of this technique.
URI: http://140.113.39.130/cdrfb3/record/nctu/#NT890591098
http://hdl.handle.net/11536/67869
显示于类别:Thesis