Simulation analysis and design of permanent magnetic focusing system for Gyrotron Rectifier
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摘要: 回旋波整流器是无线输电系统的核心器件，磁场强度和分布直接决定了整流器的效率和功率。本文创新的引入辅助磁路，基于Ansoft Maxwell软件建立回旋波整流器用永磁聚焦系统模型。通过静磁场仿真，分析有无辅助磁路结构，中心轴线和偏移中心轴线不同位置的磁场分布，计算分析了永磁聚焦系统退磁场影响，最终设计了一种匹配C波段回旋波整流器用新型永磁聚焦结构。计算结果表明：均匀区磁感应强度为0.22 T，均匀区长度57 mm，不均匀度为±1.76%，倒向场磁感应强度约为均匀区磁感应强度的10%，分布符合余弦分布的递减要求。通过实际样品验证了仿真计算的符合度，为工程化应用提供有效指导。Abstract:
Background Cyclotron rectifier is the core component of wireless power transmission system, and the magnetic field strength and distribution directly determine the efficiency and power of the rectifier.Methods The article innovatively introduces an auxiliary magnetic circuit and establishes a permanent magnet focusing system model for cyclotron wave rectifiers based on Ansoft Maxwell software.Purpose Through static magnetic field simulation design, the presence or absence of auxiliary magnetic circuit structure, magnetic field distribution at different positions of the central axis and offset central axis were analyzed. The influence of demagnetizing field on the permanent magnet focusing system was calculated and analyzed. Finally, a new type of permanent magnet focusing structure for matching C-band cyclotron wave rectifiers was designed.Results The calculation result show that the magnetic induction intensity in the uniform zone is 0.22 T, the length of the uniform zone is 57 mm, the non-uniformity is ±1.76%, and the reverse field magnetic induction intensity is about 10% of the magnetic induction intensity in the uniform zone. The distribution conforms to the decreasing requirement of cosine distribution.Conclusions The conformity of simulation calculations has been verified through actual products, providing effective guidance for engineering applications. -
图 2 不同磁路结构三维截面
Figure 2. Three-dimensional cross-sections of differengt magnetic circuit structures
图 3 不同磁路结构中心轴线磁感应强度分布
Figure 3. The distribution of magnetic induction intensity along the central axis of different magnetic circuit structures
图 4 偏离中心线不同位置磁场分布
Figure 4. Magnetic field distribution at different positions deviating from the centerline
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