基于简化SVPWM算法双三电平变换器研究

详细分析了三电平SVPWM的简化算法,将传统两电平电压空间矢量控制算法应用于双三电平变换器。在d-q坐标系下建立基于开关函数的三电平中点钳位电压型整流器高频数学模型,在此基础上采用电压外环与电流内环的双闭环控制来实现三电平整流器的高性能特性。利用三电平矢量控制算法,实现电机的无速度传感器矢量控制。在实验室中以DSP F2812为主控制器建立实验平台,验证了采用上述算法的优越性能。

Study of Dual Three-level Inverter Based on Simplified SVPWM Algorithm

The algorithm of simplified three-level SVPWM was analyzed in detailed,the traditional two-level voltage space vector control algorithm was applied to the dual three-level inverter.The high-frequency mathematical model of three-level neutral-point-clamped(NPC) voltage source rectifier(VSR) was established based on the switching function in the d-q frames firstly,dual closed loop control of voltage outer ring and current inner ring were used to achieve the three-level rectifier high-performance features.The three-level vector control algorithm was used to achieve motor control of speed sensorless vector control.In the laboratory,the experimental platform was established based on DSP F2812 controller,and verified the superior performance using above algorithm.