Study on Electromagnetic Structure Design of Linear Motor Type Reactor Control Rod Drive Mechanism
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摘要: 电磁结构设计是电磁型反应堆控制棒驱动机构设计的核心环节。本文提出了一种适用于控制棒驱动机构的圆筒型直线电动机。首先，描述了该类电机的基本电磁结构，其次，采用解析计算的方法，推导了可行的极槽数配合，分析了一种新型集中绕组结构。然后，采用二维有限元的方法，对极槽配合、绕组结构形式和电磁结构尺寸等影响机构性能指标的关键因素进行了深入研究，并基于研究成果开展了电磁结构详细设计和试验验证等工作。试验结果表明，直线电机型控制棒驱动机构电磁结构设计合理，可按照控制指令实现提升、下插、保持和落棒等基本功能，提升力、跟随特性和落棒性能等技术指标均可满足设计要求。Abstract: The electromagnetic structure design is the core of the design of control rod drive mechanism (CRDM) for electromagnetic reactors. This study introduces a cylindrical linear motor suitable for the CRDM. Firstly, this study describes the basic electromagnetic structure of such motor. Secondly, in an analytical calculation method, the feasible slot-pole combination is derived and a new concentrated winding structure is analyzed. Thirdly, further study is performed on the key factors affecting the performance indexes of the CRDM, including the slot-pole combination, winding structure form, and electromagnetic structure dimensions, in the 2D finite element method (FEM). Finally, based on the further study results, the detailed design and test & verification of the electromagnetic structure are carried out. The test results show that the linear motor type CRDM is designed reasonably, and can perform the basic functions, such as lifting, inserting downward, holding and dropping, in accordance with the control commands, and that its technical specifications, such as the lifting force, following characteristic and rod drop performance, can meet the design requirements.
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Key words:
- CRDM /
- Linear motor /
- FEM
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图 2 2个动子位置处的开路磁通分布
Figure 2. Open-Circuit Magnetic Flux Distribution at the Locations of 2 Rotors
图 3 反电势基波和谐波分量对比
Figure 3. Comparison of Fundamental and Harmonic Components for Counter-Electromotive Force (CEMF)
图 5 力移特性曲线族优选组合
Figure 5. Optimal Combinations of Force-Displacement Characteristic Curves
表 1 极槽配合
Table 1. Slot-Pole Combination
${N_S}$ ${N_P}$ 3 2, 4, 5 6 4, 5, 7, 8, 10, 11 9 6, 12, 15 12 8, 10, 14, 16, 20, 22 
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