一种空间矢量的三相逆变器调制方法研究

针对三相逆变器提出了一种基于PID神经网络的空间矢量调制(SVPWM)方法。三相逆变器具有矢量的开关状态,其调制算法的实现非常复杂,在设计的方案中,摒弃传统的神经网络,采用PID神经网络用于SVPWM算法的快速实现,三层前馈PID神经网络以指令电压和角度作为输入信息,借助于一个简单的计时器和逻辑电路,产生三相12路对称脉宽调制波形。最后利用Matlab神经网络信息工具箱依据误差逆变算法使用实测数据对该系统进行了测试,结果证明,在全部线性调制区内,系统性能很好。

A Three-phase Inverter Strategy Research with Space Vector Modulation

According to three-phase inverter, this paper introduces a space vector pulse width modulation which based on PID neural network. This paper, instead of the traditional neural network, adopts PID neural network modularization design for rapid implementation of SVPWM algorithm. three-layer feedforward PID neural network ,with instruction voltage angle as the input and information, with the aid of a simple timer and logic circuit, produces three phase symmetrical 12 sinusoidal pulse width modulation waveforms. The measured data are used to test the proposed system by a backpropagation algorithm in the MATLAB Neural Network Toolbox. Experimental results show that the method is feasible, and can effectively improve response speed and stability in allSlinearSregions.