Experimental Characterization and Feasibility Study on High Mechanical Strength Electrical Steels for High-Speed Motors Application
Experimental Characterization and Feasibility Study on High Mechanical Strength Electrical Steels for High-Speed Motors Application
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DOI：
10.1109/tia.2020.3033262
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发表时间：
2021-01-01
影响因子：
4.4
通讯作者：
Doppelbauer, Martin
中科院分区：
文献类型：
--
作者：
Ou, Jing;Liu, Yingzhen;Doppelbauer, Martin
套筒经常用于保护高速转子免受高速时的高离心力的影响。目前，常用的是钛和镍镍合金等金属套筒以及碳纤维和玻璃纤维等纤维套筒。由于电枢反应，金属套具有很高的涡流损耗。纤维套筒可避免较大的涡流损耗。然而，转子的散热能力却降低了。此外，纤维套筒对温度和制造工艺非常敏感。因此，无套内置式永磁体转子结构具有很大的吸引力。为了避免套筒，需要高机械强度和低铁芯损耗的电工钢。非晶态金属已被证明是一种很好的应用。通过对一台15.7kW、12.5万r/min的IPM演示电机的研究，有助于提高电机的功率密度和效率。然而，由于非晶态金属在铁芯制造过程中机械强度容易下降，因此高硅钢10JNEX900被考虑作为替代方案。对10JNEX900的电磁性能和力学性能进行了测试。用非晶态金属2605SA1制成的样机验证了仿真方法，并以此为基准电机研究了新型转子铁心材料的可行性。
Sleeves are frequently used for protecting high-speed rotors from high centrifugal forces at high speeds. Currently, metal sleeves such as titanium and inconel alloys and fiber sleeves such as carbon fiber and glass fiber are commonly used. Metal sleeves have high eddy current losses due to armature reaction. Fiber sleeves can avoid high eddy current losses. However, heat dissipation abilities of the rotors are decreased. Moreover, fiber sleeves are sensitive to temperature and manufacturing processes. Hence, sleeve-free interior permanent-magnet rotor structure is attractive. To avoid sleeves, electrical steels of high mechanical strength and low core losses are required. Amorphous metal has been proved as a good candidate for such application. It can help to improve the power density and efficiency based on a study of a 15.7 kW, 125 000 r/min IPM demonstrator motor. However, because the mechanical strength of amorphous metal is easily degraded during core manufacturing, a high-silicon steel, 10JNEX900, is considered as an alternative. The electromagnetic and mechanical properties of 10JNEX900 are tested. A prototype made from amorphous metal 2605SA1 is tested to verify the simulation methods and it is used as a benchmark motor to study the feasibility of the new rotor core material.