IC697ACC803
IC697ACC803
IC697ACC803
厦门光沃自动化设备有限公司
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IC697ACC803
功率单元整体拓扑结构为交一直一交三相整流/单相逆变输出结构.整流侧为二极管三相全桥整流,将输入的三相交流整成直流,并通过电容器滤波。逆变侧为IGBT模块H桥单相逆变,通过对逆变桥进行SPWM控制,得到正弦的单相交流输出。其中每个单元均配备了机械旁路功能,同时采用非对称旁路技术,可靠性与稳定性大大提升。

图6:非对称旁路技术示意图
如上图所示,HD92系列高压变频器采用单元级联方式,当其中某个单元出现故障后,通过非对称旁路技术可以使系统不停机运行。HD92的非对称技术可以实现比传统旁路方案更高的电压输出幅值,电压输出能力相比传统方式高能提高20%,这使得整个系统的可靠性大大提高。
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