【摘要】 研究了T型三电平逆变电源的SVPWM算法,通过对该算法的分析,把用于常规三电平逆变器的改进型SVPWM算法应用于T型三电平逆变器,不仅省略了大量三角函数运算,还省去了小扇区判断的步骤。以三相参考电压的角度为三相合成矢量的相位角,采用电压外环与电流内环的双闭环控制,实现了单位功率因数输出。仿真结果表明,当逆变电源带容性或感性等非线性负载时,仍能实现单位功率因数输出,并验证了该方法的正确性。更多还原

【Abstract】 The SVPWM algorithm of the T-type three-level inverter power supply was studied. The improved SVPWM algorithm of the conventional three-level inverter was applied to the T-type three-level inverter, which not only omitted a large number of trigonometric function calculation, but also omitted the steps of small sector judgment. Taking the angle of the three-phase reference voltage as the phase angle of the three-phase composite vector, the double closed-loop control of the voltage outer loop and the current inner loop was adopted to achieve unity power factor output. The simulation results show that when the inverter power supply has a non-linear load such as capacitive or inductive load, it can still achieve the characteristics of unit power factor output, which verifies the correctness of the method.更多还原