新磁阀结构磁控电抗器磁损特性研究

分析磁阀式可控电抗器MCR(magnetic-valve controllable reactor)的主要工作原理以及MCR铁心损耗的主要来源,得出在工程上磁滞损耗与涡流损耗的计算公式.在传统磁阀结构的基础上提出了新型磁阀结构,并对传统磁阀结构与新型磁阀结构进行对比分析.通过理论分析可知,新磁阀结构采用圆弧面作为磁场缓...

Research on Magnetic Loss Characteristics of Magnetic Controllable Reactor with Novel Magnetic Valve Structure

The main working principle of a magnetic-valve controllable reactor (MCR) and the main source of its core loss are analyzed, and the calculation formula for the hysteresis loss and eddy current loss in engineering is also given. Based on the traditional magnetic valve structure, a novel type of magnetic valve structure is proposed, and a comparative analysis of these two types of structure is performed. According to theoretical analysis, the novel magnetic valve structure adopts a circular arc surface as the magnetic field buffer surface, which reduces the amount of magnetic field divergence at the magnetic valve and makes the magnetic flux density distribution therein more uniform, thereby greatly reducing the corresponding leakage magnetic loss. Using the Ansys electromagnetic field simulation software, the three-dimensional dynamic simulations of MCRs with the traditional and novel magnetic valve structures are carried out under the same voltage level. Four simulation moments in one working cycle are collected, and the magnetic flux density distribution field diagrams of core magnetic valves in both MCRs are compared and analyzed. Simulation results show that the magnetic flux distribution in the core of MCR with the novel magnetic valve structure is optimized, the magnetic flux density is more uniform, and the magnetic field divergence is greatly improved, which effectively reduces the leakage magnetic loss of MCR. As a result, the theoretical analysis is verified, which also illustrates the rationality and advancement of the novel magnetic valve structure.