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感应型无轴承电机的优化气隙磁场定向控制
引用本文:贺益康,年珩,阮秉涛.感应型无轴承电机的优化气隙磁场定向控制[J].中国电机工程学报,2004,24(6):116-121.
作者姓名:贺益康  年珩  阮秉涛
作者单位:浙江大学电气工程学院,浙江,杭州,310027
基金项目:浙江省自然科学基金(502050)
摘    要:由于悬浮力与转矩之间以及水平、垂直悬浮力之间的耦合,动态过程中感应型无轴承电机转子的悬浮将变得不稳定。针对磁悬浮力是定、转子间气隙磁密有源不平衡结果的概念,该文建立了感应型无轴承电机气隙磁场定向控制模型,进行了起动及突加负载大动态过程稳定悬浮的运行仿真。然而负载运行中转子参数变化和铁磁非线性饱和的影响,定向用气隙磁通发生了幅值及相位的变化,破坏了两正交悬浮力间的解耦条件,影响了转子的稳定悬浮性能。对此,该文又提出了一种优化气隙磁场定向控制策略和系统,通过对气隙磁链幅值和相位的实时修正,实现了在气隙磁场定向基础上的动态解耦控制,有效地提高了考虑参数变化及计及饱和时感应型无轴承电机的实际悬浮运行能力,为实际系统的动态解耦控制提供了实施途径。

关 键 词:感应型无轴承电机  优化  气隙磁场定向控制  电磁轴承  交流电机
文章编号:0258-8013(2004)06-0116-06
修稿时间:2003年12月20

OPTIMIZED AIR-GAP-FLUX ORIENTATED CONTROL OF AN INDUCTION-TYPE BEARINGLESS MOTOR
HE Yi-kang,NIAN Heng,RUAN Bing-tao.OPTIMIZED AIR-GAP-FLUX ORIENTATED CONTROL OF AN INDUCTION-TYPE BEARINGLESS MOTOR[J].Proceedings of the CSEE,2004,24(6):116-121.
Authors:HE Yi-kang  NIAN Heng  RUAN Bing-tao
Abstract:Due to the coupling between the levitation force and the electromagnetic torque,and between the two orthogonal levitation forces,rotor suspension of an induction-type bearingless motor could become unstable. In connection with the concept that the magnetic levitation force is the active unbalance of the air-gap flux-density between stator and rotor, the air-gap-flux oriented control model of the induction-type bearingless motor was put forward firstly and the stable suspension operation in the dynamic process of starting-up and sudden loading were simulated in this paper. However,the variation of rotor parameters and the non-linear magnetic saturation at loading condition cause the changing in amplitude and phase of the air-gap-flux,which further destroys the decoupling condition between the two perpendicular levitation forces and deteriorates stable suspension of the rotor. To solve these problems,a kind of optimized air-gap-flux orientated control strategy and its implemental system were suggested, in which the amplitude and phase angle of the air-gap-flux were corrected in real-time and the dynamic decoupling control was implemented.These measures effectively enhance the stable suspension capability of the motor with the rotor parameter variation and magnetic saturation considered and offer an implemental scheme for the operation control of a practical bearingless motor system.
Keywords:Induction-type bearingless motor  Air-gap-flux orientated  Levitation force  Dynamic decoupling control
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