CAJ | 학술논문

空心补偿脉冲发电机采用新型复合材料替代传统的铁心，在提高电机的功率密度同时，也带来了一些新的问题。由于复合材料导热性能较差，导致电机整体的散热性能不佳，因而连续放电运行时电机的热性能预估显得十分重要。针对该问题，建立了空心脉冲发电机的温度场有限元模型，对绕组和气隙进行了合理的等效简化，提出一种计算电机内空气温度的迭代算法，并通过实验验证了仿真模型的正确性，为同类电机的温度场计算提供了方法。提出利用电磁场有限元仿真计算电机热源损耗的方法，分析了其驱动轨道炮负载时的温度场，讨论了不同放电周期下电机的温度分布特点及变化规律，计算出样机连续运行的安全放电周期，为后续指导电机的负载实验和优化设计奠定了基础。
공심보상맥충발전궤채용신형복합재료체대전통적철심，재제고전궤적공솔밀도동시，야대래료일사신적문제。유우복합재료도열성능교차，도치전궤정체적산열성능불가，인이련속방전운행시전궤적열성능예고현득십분중요。침대해문제，건립료공심맥충발전궤적온도장유한원모형，대요조화기극진행료합리적등효간화，제출일충계산전궤내공기온도적질대산법，병통과실험험증료방진모형적정학성，위동류전궤적온도장계산제공료방법。제출이용전자장유한원방진계산전궤열원손모적방법，분석료기구동궤도포부재시적온도장，토론료불동방전주기하전궤적온도분포특점급변화규률，계산출양궤련속운행적안전방전주기，위후속지도전궤적부재실험화우화설계전정료기출。
In order to maximize power densities, compulsators are designed as an air-core prototype. However, new problems have also been brought out by the new structure. Due to the poor thermal conductivity of composite materials, heat dissipation of the machine is severe, and heat performance estimate becomes vital during continuous discharges. In this paper, transient FEM thermal field analysis model had been built, on the basis of equivalent winding and air gap model. An iterative method to calculate the air temperature inside the machine had been proposed as well, and the results had been verified by experiments. When analyzing the compulsator under a typical railgun load, a loss calculation method based on FEM electromagnetic had been proposed. The temperature distributions under different operation conditions had been discussed, and the safe continuous discharge period had been calculated. The research process mentioned provides the theoretical and experimental guides for optimization and discharge experiments in the future.