摘要
针对变频器在工业场景中的不同应用,特别是无回馈功能的中压变频系统,设计了一种基于IGCT的制动单元。采用IGCT作为主要功率器件,对IGCT的参数和特性进行了分析。结合目前市场中常见的NPC型中压变频器拓扑,设计了相匹配的制动单元电路,并对系统的工作原理进行了描述。在器件损耗方面,评估了功率器件的结温,设计了散热水冷回路和压装结构。为了不影响直流母线电压的中点平衡,设计了独立的直流母线电压软件控制方法。最后,所设计的中压制动单元已经在工业现场应用于轧制金属复合材料的场合,证实了设计方案的可行性。
A brake unit based on IGCT was designed for different applications of frequency converter in industrial scenes,especially the medium voltage frequency conversion system without feedback function.IGCT was used as the main power device,and the parameters and characteristics of IGCT was analyzed.According to the common topology of NPC medium voltage inverter in the market,the matching circuit of brake unit was designed,and the working principle of the system was described.In terms of device loss,the junction temperature of the power device was evaluated,and the water cooling circuit and the press assembly structure were designed.In order not to affect the midpoint balance of the DC bus voltage,an independent software control method was designed.Finally,the medium voltage brake unit designed has been applied to the occasion of rolling metal composite material in the indμstrial field,which confirmed the feasibility of the design scheme.
作者
孙传杰
田凯
许纹源
卢贝贝
李楠
SUN Chuanjie;TIAN Kai;XU Wenyuan;LU Beibei;LI Nan(Tianjin Research Institute of Electric Science Co.,Ltd.,Tianjin 300180,China)
出处
《电气传动》
2025年第8期33-39,共7页
Electric Drive
基金
天津电气院科研开发创新基金(YF2024ZL002)。
