Stable positioning of bearingless induction machine under temperature variation

无轴承感应电机在温度变化下的稳定定位

• 批准号: 13650316
• 负责人: CHIBA Akira
• 金额: $ 2.37万
• 依托单位: Tokyo University of Science
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 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/grant/KAKENHI-PROJECT-13650316/
• 关键词: bearingless motor; bearingless; magnetic bearing; magnetic suspension; 電磁力支持

In recent years, developments of bearingless drives are undergoing several parts of the world. The bearingless drives are the electric motors or generators with self-magnetic suspensions. Thus, there is increasing expectation of wide range of applications such as vacuum, low or high temperature conditions, harsh environments, long life and highly reliable machines. In fact, extensive developments can be seen in artificial heart blood pumps, canned pumps in chemical plants, semiconductor processes, bio reactors in bio engineering, telescope positioning in space satellitesThe investigators have been done notable research in induction type bearingless motors. A control method to suspend a rotation shaft at rated load torque has been made obvious. However, there exist a possible problem of touch down of the shaft under temperature variations of a rotor resistanceIn this research, magnetic suspension is found to be unstable is flux vectors have phase differences when rotor resistance reference value has discrepancy with respect to the actual rotor resistance. To avoid this problem, on-line estimation method of the rotor resistance is proposed. In the proposed method, a unique bearingless magnetic suspension feedback signal is used. In order to suspend a shaft weight, a static radial force is required, thus, radial force commands automatically generated in feedback loops to cancel the static force. Information of radial force command is employed to find the rotor resistance value. In addition, temperature drift in gap sensors are extensively compensated to realize practical system setup

近年来，无轴承传动的发展在世界上许多地方都在进行。无轴承驱动器是具有自磁悬浮的电动机或发电机。因此，人们越来越期望广泛的应用，如真空，低温或高温条件，恶劣环境，长寿命和高可靠性的机器。实际上，在人工心脏血泵、化工厂的屏蔽泵、半导体工艺、生物工程中的生物反应器、空间卫星中的望远镜定位等方面都有广泛的发展。以额定负载转矩悬挂旋转轴的控制方法已经变得显而易见。然而，在转子电阻的温度变化下，存在可能的轴触地的问题。在本研究中，当转子电阻参考值与实际转子电阻存在偏差时，磁悬浮被发现是不稳定的，因为磁通矢量具有相位差。为了避免这一问题，提出了转子电阻的在线估计方法。在所提出的方法中，一个独特的无轴承磁悬浮反馈信号被使用。为了悬挂轴重，需要静态径向力，因此，在反馈回路中自动生成径向力命令以抵消静态力。利用径向力指令信息求出转子阻力值。此外，对间隙传感器的温度漂移进行了广泛的补偿，以实现实际的系统设置

项目成果

折田崇一, 野本貴史, 千葉 明, 深尾正: "二次抵抗値同定システムにおける変位センサの温度ドリフトの影響と補償"電子情報通信学会技術報告. 102-43. 13-18 (2002)

Takaichi Orita，Takashi Nomoto，Akira Chiba，Tadashi Fukao：“二次电阻值识别系统中位移传感器温度漂移的影响和补偿”IEICE 技术报告 102-43（2002）。

Tkahashi Nomoto, Akira Chiba, Tadashi Fukao: "The Variation and Compensation of the Rotor Resistance in Vector Controlled Bearingless Induction Motors"JSME Dynamics symposium. 221-224 (2001)

Tkahashi Nomoto、Akira Chiba、Tadashi Fukao：“矢量控制无轴承感应电机转子电阻的变化与补偿”JSME 动力学研讨会。