摘要
传统中点钳位(NPC)三电平变频器存在功率器件损耗不平衡问题,限制了变频器容量和功率器件开关频率的提升。有源钳位式NPC拓扑或者层叠式NPC拓扑可以产生更多的零电平状态实现功率器件损耗平衡。有源层叠式中点钳位式拓扑是有源钳位式NPC的衍生拓扑。对有源层叠中点钳位式NPC拓扑进行分析,利用交替反向层叠式(APOD)PWM进行脉宽调制。通过仿真验证该拓扑的工作特点和APOD-PWM算法的有效性。
Traditional neutral point clamped (NPC) three-level converter has loss unbalance problem which limits the power capability and switching frequency. However, this problem can be overcomed by active NPC or stacked NPC topology since their additional zero states. Active stacked NPC is a derive topology of active NPC. The operating concept and control algorithm of ASNPC were studied, the APOD-PWM was used to modulate pulse width. Simulation results validate the analysis and APOD-PWM strategy of proposed topology.
出处
《电气传动》
北大核心
2012年第2期48-52,共5页
Electric Drive
关键词
三电平变换器
中点钳位式
脉宽调制
开关损耗
three-level converter
neutral point clamped
pulse width modulation
switching losses