文章简要分析了中点钳位式(NPC)三电平逆变器的基本原理,提出了一种平衡中点电位的新方法,实现了全数字化控制系统,最后通过仿真验证了该方案的正确性.-This paper briefly analyzes the basic principles of the midpoint of the three-level clamped (NPC) inverter, proposed a new method for balancing the midpoint potential, to achieve a fully digital control system, and finally through the correct simulation of the program sex.