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介绍了一种具有更高的效率和多种转子设计的PM永磁电动机，既能提高功率因数，又能低速直接驱动，调速范围比较宽，伺服性能好，激励转子无需能量驱动，没有励磁电流，转子无铜耗，发热量低，散热能力强，能够满足特种加工的快速反应能力、高速与超高速，精密与超精密等要求，可根据整机性能要求选用不同的转子结构来满足使用要求。研究结果为提高发动机效率，减低系统能量损耗，满足运动控制的需求，合理设计结构参数提供了可靠的依据。 相似文献
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介绍一种由嵌入式带磁阻支持的径向高性能磁钢结构LPMR大功率永磁同步电动机,采用相复励分流励磁原理,配以THYR IPAR T励磁系统,具备良好的冷却效果,过载能力高、转动惯量低,起动性能好,可满足大的起动转矩、最大转矩倍数和低速直接驱动的需求,并能在较大的负载变动范围内始终保持高效运行,使电机具有很高的动态性能。电机防护等级为IP54,可满足用户在各种环境下的使用要求。研究结果为降低系统能量损失,保护用电设备,合理设计参数提供了可靠的依据。 相似文献
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According to the dimensional tolerances on hydrodynamic journal bearing system, a nonlinear oil film force model was established,and the Reynolds＇ equation was solved by adopting finite difference method. In order to fulfill different dimensional tolerances in the system,adopting 2kfactor design and using the eccentricity ratio corresponding to the stability critical curve,the effects of the friction power loss brought by the dimensional tolerances of the dynamic viscosity,bearing width,bearing diameter and journal diameter were analyzed. The effect on dynamic characteristics of the hydrodynamic journal bearing system was quantitatively analyzed,and the nonlinear dynamic analysis, modeling and calculation methods were studied while considering the manufacturing tolerances. The results show that in contrast to the impacts of the tolerances in journal diameter,dynamic viscosity and bearing width,the bearing diameter tolerance would lead to the rise in the power loss, and the dimensional tolerances have different degrees of impacts on the journal bearing system. The friction power loss decreased as the eccentricity ratio increased, and when the eccentricity ratio was 0. 695 the power loss came to the minimum.The investigation would find the best solution and reduce energy consumption,then control varieties of nonlinear dynamical behavior effectively,and provide a theoretical basis for hydrodynamic journal bearing system in parameter design. 相似文献
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