Motor structure and mechanical output density of IPM motor using bulk superconductors as magnetic field
Motor structure and mechanical output density of IPM motor using bulk superconductors as magnetic field
复制标题
以体超导体为磁场的IPM电机结构及机械输出密度
DOI：
10.1088/1742-6596/1293/1/012076
复制
发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Yutaka Terao and Hiroyuki Ohsaki
中科院分区：
文献类型：
--
作者：
Wataru Akada;Yutaka Terao and Hiroyuki Ohsaki
近来，诸如电动车辆和船舶的具有电动机的交通工具正在迅速增加。已经进行了各种尝试来减小电动机的尺寸以增加运输设备系统布局的自由度和它们的运输的能量效率。内置式永磁同步电动机除了利用永磁体的转矩外，还利用凸极产生的磁阻转矩，可以实现比表面式永磁同步电动机更高的转矩。与SPMSM相比，IPMSM可以通过应用诸如最大输出控制和弱磁控制的控制方法来具有宽的操作范围。因此，IPMSM有望用于各种应用，如电动汽车、船舶和重型设备。通过在IPMSM的转子中用块体超导体代替永磁体，由于磁化的块体超导体的更强的磁场，磁体转矩增加。这导致电机总扭矩密度的增加，并有助于电机尺寸的减小。在这项研究中，我们提出了一个IPMSM与大块超导体的目标，增加机械输出密度。在所提出的IPMSM中，冷却空间留在转子内部以将大块超导体冷却到它们的超导状态。在这里，基于有限元方法进行分析，以验证所提出的电机的效用。首先，讨论了具有块状超导体和冷却空间的电机的设计。结果表明，通过调整超导块材的位置和磁垒的结构可以提高总转矩。此处显示的最大总扭矩为22500 Nm。然后，建议的IPMSM的机械输出密度与传统的IPMSM进行比较。结果表明，所提出的IPMSM的机械输出密度比传统的IPMSM高38%。最后，磁屏蔽效应，这可能是一个问题，当使用大块超导体，进行了讨论。通过电磁场分析，表明冷却空间将外磁场削弱到磁体表面的百分之几，屏蔽电流的影响很小。
Recently, means of transportation with electrical motors such as electric vehicles and ships are rapidly increasing. Various attempts have been made to reduce the size of the motors to increase the freedom of transport equipment system layouts and the energy efficiency of their transportation. Interior permanent magnet synchronous motors (IPMSMs) can realize higher torque than surface permanent magnet synchronous motors (SPMSMs) by using reluctance torque caused by magnetic saliency in addition to magnet torque. In comparison with SPMSMs, IPMSMs can have wide operation ranges by applying control methods such as maximum output control and field weakening control. Therefore, IPMSMs are expected to be used for a variety of application such as electric vehicles, ships and heavy equipment. By replacing permanent magnets with bulk superconductors in the rotors of IPMSMs, the magnet torque increases due to the stronger magnetic field of magnetized bulk superconductors. This leads to an increase in total torque density of the motors and contributes to motor size reduction. In this research, we propose an IPMSM with bulk superconductors with the goal of increasing the mechanical output density. In the proposed IPMSM, cooling space is left inside the rotor to cool the bulk superconductors to their superconducting state. Here, analysis based on finite element method was carried out to verify the utility of the proposed motor. First, the design of the motor with bulk superconductors and cooling space is discussed. It is shown that the total torque can be increased by adjusting the position of the bulk superconductor and modifying the structure of the flux barrier. The maximum total torque shown here was 22500 Nm. Then, the mechanical output density of the proposed IPMSM is compared with a conventional IPMSM. It is shown that the mechanical output density of the proposed IPMSM is 38% higher than the conventional IPMSM. Finally, the magnetic shielding effect, which might be a problem when using bulk superconductors, is discussed. By using electromagnetic analysis, it is shown that the external magnetic flux is weakened by the cooling space to several percent of the magnets' surface and the effect of the shielding current is trivial.
YBCO块体在交流外磁场中的俘获场特性
DOI：
10.1541/ieejpes.124.1357
发表时间：
2004
期刊：
影响因子：
--
作者：
H. Ueda;A. Ishiyama;T. Morisaki
通讯作者：
T. Morisaki
DOI：
10.1002/cmr.b.20083
发表时间：
2007-04-01
影响因子：
0.9
作者：
Nakamura, Takashi;Itoh, Yoshitaka;Uzawa, Jun
通讯作者：
Uzawa, Jun