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    SYSTEM AND METHOD OF ROTOR TIME CONSTANT ONLINE IDENTIFICATION IN AN AC INDUCTION MACHINE
    3.
    发明公开
    SYSTEM AND METHOD OF ROTOR TIME CONSTANT ONLINE IDENTIFICATION IN AN AC INDUCTION MACHINE 审中-公开
    系统在VERFAHREN ZUR在线标识EINER ROTORZEITKONSTANTE BEI EINER AC-INDUKTIONSMASCHINE

    公开(公告)号：EP3014760A2

    公开(公告)日：2016-05-04

    申请号：EP14744218.0

    申请日：2014-06-19

    申请人： Eaton Corporation

    发明人： WANG, Kai ,  YAO, Wenxi ,  LI, Huaqiang ,  LU, Zhengyu

    IPC分类号： H02P21/00

    CPC分类号： H02P21/08 ,  H02P21/13 ,  H02P21/16

    摘要： A system and method for determining a rotor time constant of an AC induction machine is disclosed. During operation of the induction motor, a flux signal is injected into a rotor flux command so as to generate a time-variant rotor flux. A voltage-current flux observer determines amplitudes of rotor flux variations resulting from the time-variant rotor flux, with the amplitudes of the rotor flux variations comprising an amplitude of a rotor flux variation based on a current model of the voltage-current flux observer and an amplitude of a rotor flux variation based on a combined voltage-current model of the voltage-current flux observer. A rotor time constant of the induction motor is then estimated based on the determined amplitudes of the rotor flux variations.

    摘要翻译： 公开了一种用于确定AC感应电机的转子时间常数的系统和方法。 在感应电动机的操作期间，将磁通信号注入到转子磁通指令中，以产生时变转子磁通。 电压 - 电流通量观测器确定由时变转子磁通产生的转子磁通变化的幅度，转子磁通量变化的幅度基于电压 - 电流通量观测器的当前模型，包括转子磁通量变化的幅度，以及 基于电压 - 电流通量观测器的组合电压 - 电流模型的转子磁通量变化幅度。 然后基于确定的转子磁通变化的幅度来估计感应电动机的转子时间常数。

    DYNAMIC PERFORMANCE AND ACTIVE DAMPING METHODS IN WEB WINDER TENSION CONTROL SYSTEMS
    5.
    发明公开
    DYNAMIC PERFORMANCE AND ACTIVE DAMPING METHODS IN WEB WINDER TENSION CONTROL SYSTEMS 审中-公开

    公开(公告)号：EP3363755A1

    公开(公告)日：2018-08-22

    申请号：EP18156194.5

    申请日：2018-02-09

    申请人： Eaton Corporation ,  Zhejiang University

    发明人： LI, Huaqiang ,  YAO, Wenxi ,  CHEN, Fayi ,  LU, Zhengyu

    IPC分类号： B65H23/06 ,  B65H23/18 ,  B65H23/195

    摘要： A control system (42) for controlling operation of main and secondary drive units (22, 34) in a web winder system (10) to provide tension control of a continuous material web (12) is disclosed. The control system (42) causes the main drive unit (34) to operate in a velocity mode to set a linear velocity of the continuous material web (12). The control system (42) receives inputs from tension and speed detectors (44) in the web winder system (10) that detect a tension and speed of the continuous material web (12) and causes the secondary drive unit (22) to operate in a modified torque regulated closed-loop tension control mode so as to control a tension in the web material (12), with the control system (42) causing the secondary drive unit (22) to operate according to a torque regulated closed-loop tension control mode and integrate a speed feedback loop into the torque regulated closed-loop tension control mode so as to introduce active damping into the tension control.

    SYSTEM FOR DETERMINING A MAGNETIZING CURVE AND ROTOR RESISTANCE OF AN INDUCTION MACHINE AND METHOD OF MAKING SAME
    6.
    发明公开
    SYSTEM FOR DETERMINING A MAGNETIZING CURVE AND ROTOR RESISTANCE OF AN INDUCTION MACHINE AND METHOD OF MAKING SAME 审中-公开
    系统用于确定磁化曲线和感应电机转子电阻和方法及其生产

    公开(公告)号：EP2936675A1

    公开(公告)日：2015-10-28

    申请号：EP13818607.7

    申请日：2013-12-17

    申请人： Eaton Corporation

    发明人： WANG, Kai ,  YAO, Wenxi ,  LI, Huaqiang ,  LU, Zhengyu

    IPC分类号： H02P21/14

    CPC分类号： H02P23/14 ,  G01R31/34 ,  H02P21/16 ,  H05K13/00 ,  Y10T29/49004

    摘要： A system for identifying magnetizing inductance and rotor resistance of an induction machine comprises an induction machine comprising a rotor and a stator, a DC voltage bus, and a DC-to-AC voltage inverter coupled to the DC voltage bus and to the induction machine. The system also comprises a controller configured to cause the DC-to-AC voltage inverter to apply a square-wave excitation to a plurality of phases of the induction machine, determine a stator resistance of the stator of the induction machine based on the square-wave excitation, and determine a rotor resistance of the rotor of the induction machine based on the square-wave excitation. The controller is also configured to calculate a magnetizing curve for the induction machine based on the stator and rotor resistances and control the induction machine to operate based on the magnetizing curve.