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1. 发明申请

US20190068097A1 SYSTEM AND METHOD FOR STABILITY CONTROL IN ADJUSTABLE SPEED DRIVE WITH DC LINK THIN FILM CAPACITOR 审中-公开
公开(公告)号：US20190068097A1
公开(公告)日：2019-02-28
申请号：US15692898
申请日：2017-08-31
申请人： Eaton Corporation , Zhejiang University
发明人： Huaqiang Li , Wenxi Yao , Zhentian Qian
IPC分类号： H02P21/05 , H02P21/16 , H02P25/024 , H02P27/12 , G05B19/416
CPC分类号： H02P21/05 , G05B19/416 , G05B2219/49048 , G06F17/13 , H02P21/00 , H02P21/16 , H02P25/024 , H02P27/06 , H02P27/12 , H02P2201/03 , H02P2205/07
摘要： A control system for actively damping an output of an adjustable speed drive (ASD) having a DC link thin film capacitor is programmed to calculate a d-axis damping coefficient and a q-axis damping coefficient for stabilizing an output of the ASD based at least on a voltage across the DC link thin film capacitor at a steady operating point. The control system is further programmed to extract d-axis and q-axis perturbations in d-axis and q-axis output currents of the ASD using a high pass filter, damp the d-axis perturbation and the q-axis perturbation with the d-axis damping coefficient and the q-axis damping coefficient, respectively, and calculate a damping frequency based on the damped d-axis perturbation and the damped q-axis perturbation. The control system is also programmed to damp an angle of rotation of a reference motor speed command for controlling the ASD using the damping frequency.

2. 发明授权

US10333444B2 System and method for stability control in adjustable speed drive with DC link thin film capacitor 有权
公开(公告)号：US10333444B2
公开(公告)日：2019-06-25
申请号：US15692898
申请日：2017-08-31
申请人： Eaton Corporation , Zhejiang University
发明人： Huaqiang Li , Wenxi Yao , Zhentian Qian
IPC分类号： H02P21/05 , H02P21/16 , H02P25/024 , H02P27/12 , G05B19/416 , G06F17/13
摘要： A control system for actively damping an output of an adjustable speed drive (ASD) having a DC link thin film capacitor is programmed to calculate a d-axis damping coefficient and a q-axis damping coefficient for stabilizing an output of the ASD based at least on a voltage across the DC link thin film capacitor at a steady operating point. The control system is further programmed to extract d-axis and q-axis perturbations in d-axis and q-axis output currents of the ASD using a high pass filter, damp the d-axis perturbation and the q-axis perturbation with the d-axis damping coefficient and the q-axis damping coefficient, respectively, and calculate a damping frequency based on the damped d-axis perturbation and the damped q-axis perturbation. The control system is also programmed to damp an angle of rotation of a reference motor speed command for controlling the ASD using the damping frequency.

3. 发明申请

US20170170753A1 SYSTEM AND METHOD FOR OPERATING A THREE-PHASE LOAD FROM A SINGLE PHASE SOURCE 有权
公开(公告)号：US20170170753A1
公开(公告)日：2017-06-15
申请号：US14969872
申请日：2015-12-15
申请人： Zhejiang University , Eaton Corporation
发明人： Huaqiang Li , Wenxi Yao , Zhengyu Lu
IPC分类号： H02P1/26 , H02P27/06
CPC分类号： H02P1/265 , H02M5/00 , H02P27/06
摘要： A power converter for operating a three-phase AC electrical machine from a single phase AC power source includes an ASD having a rectifier and inverter, and an add-on power conversion module external to the ASD that is electrically connected to each of the power source and the ASD. The power conversion module includes one or more input inductors configured to store and filter single-phase AC power received from the power source and a pair of switching devices connected to each of the input inductors at an output end thereof. A controller operably connected to the power conversion module selectively controls switching of the pair of switching devices associated with each of the one or more input inductors so as to cause a sinusoidal single phase AC power to be output from the add-on power conversion module for rectification by the rectifier.

4. 发明授权

US10377598B2 Dynamic performance and active damping methods in web winder tension control systems 有权
公开(公告)号：US10377598B2
公开(公告)日：2019-08-13
申请号：US15435549
申请日：2017-02-17
申请人： Eaton Corporation , Zhejiang University
发明人： Huaqiang Li , Wenxi Yao , Fayi Chen , Zhengyu Lu
IPC分类号： B65H23/04 , B65H23/06 , B65H23/10 , B65H23/18 , B65H23/195
摘要： A control system for controlling operation of main and secondary drive units in a web winder system to provide tension control of a continuous material web is disclosed. The control system causes the main drive unit to operate in a velocity mode to set a linear velocity of the continuous material web. The control system receives inputs from tension and speed detectors in the web winder system that detect a tension and speed of the continuous material web and causes the secondary drive unit to operate in a modified torque regulated closed-loop tension control mode so as to control a tension in the web material, with the control system causing the secondary drive unit 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.

5. 发明授权

US09667177B1 System and method for operating a three-phase load from a single phase source 有权
公开(公告)号：US09667177B1
公开(公告)日：2017-05-30
申请号：US14969872
申请日：2015-12-15
申请人： Eaton Corporation , Zhejiang University
发明人： Huaqiang Li , Wenxi Yao , Zhengyu Lu
IPC分类号： H02P1/26 , H02P27/06
CPC分类号： H02P1/265 , H02M5/00 , H02P27/06
摘要： A power converter for operating a three-phase AC electrical machine from a single phase AC power source includes an ASD having a rectifier and inverter, and an add-on power conversion module external to the ASD that is electrically connected to each of the power source and the ASD. The power conversion module includes one or more input inductors configured to store and filter single-phase AC power received from the power source and a pair of switching devices connected to each of the input inductors at an output end thereof. A controller operably connected to the power conversion module selectively controls switching of the pair of switching devices associated with each of the one or more input inductors so as to cause a sinusoidal single phase AC power to be output from the add-on power conversion module for rectification by the rectifier.

6. 发明申请

US20180237249A1 DYNAMIC PERFORMANCE AND ACTIVE DAMPING METHODS IN WEB WINDER TENSION CONTROL SYSTEMS 审中-公开
公开(公告)号：US20180237249A1
公开(公告)日：2018-08-23
申请号：US15435549
申请日：2017-02-17
申请人： Eaton Corporation , Zhejiang University
发明人： Huaqiang Li , Wenxi Yao , Fayi Chen , Zhengyu Lu
IPC分类号： B65H23/04
CPC分类号： B65H23/044 , B65H23/063 , B65H23/105 , B65H23/1806 , B65H23/195 , B65H2301/41466 , B65H2515/32 , B65H2557/264
摘要： A control system for controlling operation of main and secondary drive units in a web winder system to provide tension control of a continuous material web is disclosed. The control system causes the main drive unit to operate in a velocity mode to set a linear velocity of the continuous material web. The control system receives inputs from tension and speed detectors in the web winder system that detect a tension and speed of the continuous material web and causes the secondary drive unit to operate in a modified torque regulated closed-loop tension control mode so as to control a tension in the web material, with the control system causing the secondary drive unit 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.

7. 发明授权

US10333455B2 System and method for consistent speed regulation in a variable frequency drive 有权
公开(公告)号：US10333455B2
公开(公告)日：2019-06-25
申请号：US15085446
申请日：2016-03-30
申请人： Eaton Corporation
发明人： Xiaomeng Cheng , Huaqiang Li , Peijun Zhu , Dongxiao Wu , Kayle Wang , Qian Zhang
IPC分类号： H02P29/10 , H02P27/08 , G05B19/00 , H02P6/08
摘要： A system and method for speed regulation of a VFD circuit via an anti-windup control scheme that provides consistent speed response with no overshoot is disclosed. A control system for operating the VFD circuit includes a feedback controller programmed to receive a speed of a motor operating responsive to an initial torque command and process the speed of the motor to generate a feedback controller output. A feedforward controller of the control system is programmed to process a speed reference to generate a feedforward controller output. A command module of the control system is programmed to determine a torque command based on the processed outputs of the feedback and feedforward controllers and operate the VFD circuit to control the motor according to the torque command.

8. 发明申请

US20180062557A1 SYSTEM AND METHOD FOR CAPACITOR FAULT ENERGY INTERRUPTION IN ADJUSTABLE SPEED DRIVES 有权
公开(公告)号：US20180062557A1
公开(公告)日：2018-03-01
申请号：US15248544
申请日：2016-08-26
申请人： Eaton Corporation
发明人： Tony Tao , Xiaoling Li , Huaqiang Li
IPC分类号： H02P29/024 , H02P27/08 , H02K17/30
CPC分类号： H02P29/024 , H02H1/00 , H02K17/30 , H02M1/00 , H02M1/32 , H02M5/458 , H02M2001/007 , H02M2001/322 , H02P3/22 , H02P27/08 , H02P2201/03
摘要： An adjustable speed drive (ASD) circuit includes a rectifier bridge to convert an AC power input to a DC power, a DC link coupled to the rectifier bridge to receive the DC power, a DC link capacitor bank comprising at least first and second capacitors connected to the DC link, each capacitor having a capacitor voltage thereacross, and a protection circuit including a detection circuit configured to detect a short circuit on one or more of the first and second capacitors of the DC link capacitor bank and generate an action signal upon detection of a short circuit on one or more of the first and second capacitors of the DC link capacitor bank. The ASD circuit also includes an action circuit in operable communication with the detection circuit and configured to cause a short circuit across the DC link upon receiving the action signal from the detection circuit.

9. 发明授权

US09024569B2 System and method of rotor time constant online identification in an AC induction machine 有权
标题翻译：交流感应电机的转子时间常数在线识别系统及方法
公开(公告)号：US09024569B2
公开(公告)日：2015-05-05
申请号：US13929914
申请日：2013-06-28
申请人： Eaton Corporation
发明人： Kai Wang , Wenxi Yao , Huaqiang Li , Zhengyu Lu
IPC分类号： H02P23/00 , H02P21/14
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。然后基于所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。

10. 发明申请

US20150002072A1 SYSTEM AND METHOD FOR CONTROLLING REGENERATING ENERGY IN AN ADJUSTABLE SPEED DRIVE 有权
公开(公告)号：US20150002072A1
公开(公告)日：2015-01-01
申请号：US13931121
申请日：2013-06-28
申请人： Eaton Corporation
发明人： Yaojin Mo , Huaqiang Li , Anbo Yu , Dawei Li , Jingfeng Xie
IPC分类号： H02P23/00
CPC分类号： H02P27/06 , H02M2007/53876 , H02P3/18 , H02P21/0021 , H02P23/00 , H02P23/20 , H02P23/28 , H02P27/047 , H02P29/0241
摘要： A system and method for controlling an adjustable speed drive (ASD) to decelerate an AC load during a generating mode of operation is disclosed. The ASD includes a capacitor and an inverter coupled to a DC link. A current sensor system is coupled to an output of the inverter. The ASD further includes a control system programmed to calculate an energy of the capacitor, generate a reference power using the calculated capacitor energy, and calculate a feedback power from realtime current signals received from the current sensor system. The control system compares the feedback power to the reference power, defines a frequency offset based on the comparison, generates a speed command using the frequency offset, and outputs the speed command to the inverter to maintain a smooth DC link voltage during deceleration.

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