大功率磁悬浮鼓风机数字功放的仿真研究

Research of Digital Power Amplifier Simulation for High-power Blower with Active Magnetic Bearing

大功率磁悬浮轴承鼓风机具有体积小、转速高、可靠性高、噪音低等优点,其功率放大器采用基于现场可编程门阵列(FPGA)的三电平PWM数字功放,应用Matlab/Simulink中基于电力系统模块集库,完成数字功放电路中的半桥电路和电流采样电路的建模,通过植入M函数文件内嵌功能模块模拟了FPGA内部的数据处理流程。仿真与实验结果验证了该建模方法的正确性,为数字电路功放的仿真提供了新的准确方法。

High-power blower with active magnetic bearing （AMB） has advantages of small, high speed, high reliability, low noise,it uses three-level digital switching power amplifier base on field programmable gate array （FPGA）.Using Matlab/Simulink power system blackset library to complete the model of half-bridge circuit and current sensing circuit, simulate the FPGA internal data processing by embedded M-function modules.The sim^ation and experimental results verify the correctness of this method of modeling.It provides a new accurate method for simulation of digital circuit power amplifier.