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Paper about a new close loop current model flux observer to estimate the rotor flux, position and velocity of an induction machine. The current observer includes carefully designed sliding mode functions which are derivative of the fluxes along the a
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Simulation of Induction Machine Drive by
Composite Model Flux Observer
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异步电机的精确控制和速度辨识是交流传动系统中重要问题。在该仿真系统中,电机转速采用易于检测的电机定子电压和电流得到转速MRAS辨识算法来估算。由于速度辨识算法中电压模型的纯积分环节会引起的误差积累和漂移问题,采用改进积分型转子磁链估算模型来解决。-The precise control and the speed identification of AC motor are the very important issues on AC drive system.In this system,
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永磁同步电机的直接转矩控制,包含磁链观测,电压电流转速转矩等。很经典,很全面,功能完整.附带一个离散直接转矩控制下的模型-Direct torque control of permanent magnet synchronous motor, comprising flux observer, voltage and current speed torque and the like. Very classic, very comprehensive, full-featured. Comes
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异步电机直接转矩控制系统仿真:
模型整体结构分为三大部分:主电路部分(直流电源、逆变器、电机)、控制系统部分(采用的是直接转矩控制,所以主要有坐标变换模块,灰色部分,磁链观测器模块,红色部分,直接转矩开关表选择模块,蓝色部分,以及外环的转速调节器ASR)剩下的就是仿真结果波形观测部分(观测信号依次向下为定子ab相线电压、三相定子电流、电机转速、电机电磁转矩)
运行初始条件为以1420r./min的额定转速电机空载启动,在0.3s时刻突加额定负载50牛米。在0.5s时刻电机转速突然下降为120
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