异步电机SVM-DTC系统中的相电流检测研究

发布时间：2018-01-06 16:36

本文关键词：异步电机SVM-DTC系统中的相电流检测研究　出处：《电测与仪表》2014年21期 　论文类型：期刊论文

【摘要】：相电流检测是异步电机空间矢量调制-直接转矩控制(SVM-DTC)系统实现的关键。针对SVM-DTC系统提出了一种新的相电流检测方法,将电流传感器芯片AS712串接在逆变器下桥臂,利用每个控制周期电压矢量调制总是以三相下桥臂导通的零矢量开始的特点,在控制周期开始处零矢量作用时启动下桥臂电流采样,从而测得相电流。设计了相电流检测电路,给出了软件实现方案。实验结果表明所提相电流检测方法可行,设计的电流检测电路简单可靠、精度高,应用在异步电机SVM-DTC系统中具有优良的检测效果。
[Abstract]:Phase current detection is asynchronous motor space vector modulation - Direct Torque Control (SVM-DTC) system. The key to realize SVM-DTC system for a phase current detection method is proposed, the current sensor chip AS712 is connected in series inverter bridge, the characteristics of the zero vector using each control cycle voltage vector modulation is always in three-phase bridge arm the conduction of the beginning, the control period at the beginning of the zero vector function under the bridge arm current start sampling, thereby measuring the phase current. The design of phase current detection circuit, gives the software implementation scheme. The experimental results show that the proposed method is feasible and the phase current detection, current detection circuit design is simple and reliable, high precision, application with excellent test results in SVM-DTC system of asynchronous motor.

【作者单位】：盐城工学院;江苏大学;
【基金】：江苏省“六大人才高峰”第十一批高层次人才选拔培养资助项目(XNYQC-004)
【分类号】：TM343
【正文快照】： 0引言异步电机具有效率高、结构简单、坚固可靠、体积小及重量轻等诸多优点,广泛应用于现代工业中。异步电机的先进控制策略中,直接转矩控制(DTC)具有结构简单、转矩响应快、静态与动态性能优良等优点,获得了广泛的关注和迅速的发展[1-3]。但基本DTC(Basic-DTC)在每个控制周期

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