直流双蛙绕组电机的换向齿槽能量模型及其试验验证研究

Research and experimental test on commutation teeth-slot energy model of an electrical machine with double frog windings

针对某些特殊场合的直流双蛙绕组电机,在满负荷工作时出现换向恶化,并造成电机降负荷使用,严重影响电机的使用效率等问题,从该型双蛙绕组电机的结构出发,提出一种换向齿槽能量模型,该模型规避了传统电机换向分析中的计算繁琐、模型不够准确、物理概念错综复杂等常见问题,为换向问题的研究提供了一种新思路;同时开展双蛙绕组电机的换向研究,简化了电机换向过程的分析步骤,从能量角度揭示了换向过程的物理意义。该模型的提出为有针对性的开展此类电机的换向治理工作奠定了理论基础,也成为后续开展该型电机无火花换向区试验的必要前提。

In some special areas, the double-frog windings DC electrical machine plays its important rols, while its commutation problems cause running in half or less load, and thus lowers its efficiency. In this paper, a DC electrical machine with double frog windings is studied to solve commutation problems when working in full load. A commutation teeth-slot energy model was established to simplify the commutation projects to avoid complicated calculation, inaccurate model and intricate physical concepts. Using this model, a theoretical foundation is established for the electrical machine′s commutation and future black zone experiment.