Development of a levitated motor for liquid hydrogen car pumps

液氢汽车泵悬浮电机的开发

• 批准号: 13555065
• 负责人: KOMORI Mochimitsu
• 金额: $ 4.03万
• 依托单位: Kyushu Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13555065/
• 关键词: Sensing; Magnetic bearing; Differential transformer

Applying self-sensing technique to active magnetic bearings (AMBs) is very promising. Our group has been studying active magnetic bearings working in liquid nitrogen. When normal AMBs are used in liquid nitrogen, they do not work well. The displacement sensors for the AMBs do not work due to the low temperature of liquid nitrogen. In order to use displacement sensors working in liquid nitrogen, very expensive sensors which are especially developed would have to be bought. We have developed a displacement sensor for the AMBs used at the temperature of liquid nitrogen. In this study, the displacement sensors are evaluated not only in liquid nitrogen, but also in air. Dynamics of the self-sensing AMBs are also discussed.The self-sensing AMBs consist of a rotor (shaft), a pair of AMBs with four electromagnets, and a driving motor. The rotor consisted of a pair of iron parts for the AMBs, and measures 24 mm in diameter, 160 mm long and 0.37 kg in weight. The driving motor was a PM-type moto … More r which consisted of a rotor with permanent magnet (PM), Four electromagnets for driving, and Hall sensors for detecting the rotation angle. The motor spun without any mechanical contacts.The principle of the self-sensing sensors is based on a differential transformer. The AMB has upper and lower electromagnets with four coils. Two primary coils of the upper electromagnet are excited by the PWM amplifiers. The induced voltage is led to the two secondary coils for sensing displacements. From the results, the relationship between output voltage and vertical rotor displacement at liquid nitrogen temperature is linear in the displacement range from -0.3 to 0.3 mm.The dynamics of the self-sensing AMBs were studied. Impulse responses for the AMBs were investigated. As a result, damped free-vibration curves are observed in impulse responses. The vibration curves seem to decrease exponentially. From these results, the self-sensing AMBs are useful for suppressing the rotor vibrations - even in the low temperature environment. Less

将自检测技术应用于主动磁轴承是一种很有前途的研究方向。我们小组一直在研究在液氮中工作的主动磁轴承。当普通的AMB在液氮中使用时，它们不能很好地工作。由于液氮温度低，电磁轴承的位移传感器不工作。为了使用在液氮中工作的位移传感器，必须购买特别开发的非常昂贵的传感器。我们开发了一种适用于液氮温度下使用的电磁轴承的位移传感器。在这项研究中，位移传感器不仅在液氮中，而且在空气中进行评估。自感知电磁轴承由一个转子（轴）、一对电磁轴承和一个驱动电机组成。转子由一对用于AMB的铁部件组成，直径为24 mm，长160 mm，重量为0.37 kg。驱动电机为PM型电机 ...更多信息 该系统由一个带永磁体的转子、四个用于驱动的电磁铁和用于检测旋转角度的霍尔传感器组成。电机在没有任何机械接触的情况下旋转。自感知传感器的原理基于差分Transformer。AMB具有带四个线圈的上下电磁铁。上电磁铁的两个初级线圈由PWM放大器励磁。感应电压被引导到两个次级线圈，用于感测位移。结果表明，在液氮温度下，在-0.3 ~0.3mm的位移范围内，输出电压与转子垂直位移呈线性关系。研究了电磁轴承的脉冲响应特性。结果，在脉冲响应中观察到阻尼自由振动曲线。振动曲线似乎呈指数下降。从这些结果来看，自感知电磁轴承对于抑制转子振动是有用的-即使在低温环境中。少

项目成果

M.Komori., and S.Nomura.: "Improvement of a superconducting stepping motor"The International Conference on Erectrical Engineering (ICEE) (Jeju, Korea). 1624-1628 (2002)

M.Komori. 和 S.Nomura.：“超导步进电机的改进”国际电气工程会议 (ICEE)（韩国济州）。

M.Komori., and C.Shiraishi.: "A levitated motor with superconducting magnetic bearings assisted by self-sensing AMBs"Applied Superconductivity Conference (ASC2002). 114 (2002)

M.Komori. 和 C.Shiraishi.：“具有自感应 AMB 辅助的超导磁力轴承的悬浮电机”应用超导会议 (ASC2002)。

M.Komori, T.Tachihara: "A prototype of magnetically driven linear microactuator, Applied Electromagnetics and Mechanics"Applied Electromagnetics and Mechanics (JSAEM Studies in Applied Electromaignetics and Mechanics). Vol.9. 589-590 (2001)

M.Komori，T.Tachihara：“磁驱动线性微执行器的原型，应用电磁学和力学”应用电磁学和力学（JSAEM Studies in Applied Electromaignetics and Mechanics）。

M.Komori, S.Nomura: "Development of a magnetically levitated stepping motor using high Tc bulk superconductor"Applied Electromagnetics and Mechanics (JSAEM Studies in Applied Electromagnetics and Mechanics). Vol.9. 293-294 (2001)

M.Komori、S.Nomura：“使用高温块体超导体开发磁悬浮步进电机”应用电磁学和力学（JSAEM 应用电磁学和力学研究）。

M.Komori., and S.Nomura.: "Superconducting levitated stepping motor with new driving method"Proc.of the 6th International Conference on Motion and Vibration Control (MOVIC). 6. 812-817 (2002)

M.Komori.和S.Nomura.：“具有新驱动方法的超导悬浮步进电机”第六届国际运动与振动控制会议（MOVIC）的会议记录。