公开(公告)号：US20180237249A1

公开(公告)日：2018-08-23

申请号：US15435549

申请日：2017-02-17

Applicant: Eaton Corporation ,  Zhejiang University

Inventor： Huaqiang Li ,  Wenxi Yao ,  Fayi Chen ,  Zhengyu Lu

IPC: B65H23/04

CPC classification number: B65H23/044 ,  B65H23/063 ,  B65H23/105 ,  B65H23/1806 ,  B65H23/195 ,  B65H2301/41466 ,  B65H2515/32 ,  B65H2557/264

Abstract: 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.

公开(公告)号：US09998060B2

公开(公告)日：2018-06-12

申请号：US15248544

申请日：2016-08-26

Applicant: Eaton Corporation

Inventor： Tony Tao ,  Xiaoling Li ,  Huaqiang Li

IPC: H02P27/06 ,  H02P29/024 ,  H02P27/08 ,  H02K17/30

CPC classification number: H02P29/024 ,  H02H1/00 ,  H02K17/30 ,  H02M1/00 ,  H02M1/32 ,  H02M5/458 ,  H02M2001/007 ,  H02M2001/322 ,  H02P3/22 ,  H02P27/08 ,  H02P2201/03

Abstract: 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.

公开(公告)号：US09525377B2

公开(公告)日：2016-12-20

申请号：US14703554

申请日：2015-05-04

Applicant: Eaton Corporation

Inventor： Kai Wang ,  Wenxi Yao ,  Huaqiang Li ,  Zhengyu Lu

IPC: H02P21/08

CPC classification number: H02P21/08 ,  H02P21/13 ,  H02P21/16

Abstract: 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.

公开(公告)号：US09515598B2

公开(公告)日：2016-12-06

申请号：US14672307

申请日：2015-03-30

Applicant: Eaton Corporation

Inventor： Yaojin Mo ,  Huaqiang Li ,  Anbo Yu ,  Dawei Li ,  Jingfeng Xie

IPC: H02P27/06 ,  H02P23/00 ,  H02P27/04 ,  H02P21/00 ,  H02P3/18 ,  H02M7/5387

CPC classification number: H02P27/06 ,  H02M2007/53876 ,  H02P3/18 ,  H02P21/0021 ,  H02P23/00 ,  H02P23/20 ,  H02P23/28 ,  H02P27/047 ,  H02P29/0241

Abstract: 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.

公开(公告)号：US10377598B2

公开(公告)日：2019-08-13

申请号：US15435549

申请日：2017-02-17

Applicant: Eaton Corporation ,  Zhejiang University

Inventor： Huaqiang Li ,  Wenxi Yao ,  Fayi Chen ,  Zhengyu Lu

IPC: B65H23/04 ,  B65H23/06 ,  B65H23/10 ,  B65H23/18 ,  B65H23/195

Abstract: 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.

公开(公告)号：US20190199086A1

公开(公告)日：2019-06-27

申请号：US15854129

申请日：2017-12-26

Applicant: Eaton Corporation

Inventor： Huaqiang Li ,  Joseph Paul Uphaus

IPC: H02H7/122 ,  H02M7/5387 ,  H02P7/29 ,  H02M1/32 ,  H02M5/458

CPC classification number: H02H7/1225 ,  H02J9/06 ,  H02M1/32 ,  H02M5/4585 ,  H02M7/003 ,  H02M7/53871 ,  H02P1/029 ,  H02P7/2913 ,  H02P27/04

Abstract: A compact motor control system for selectively controlling power from a power source to a load includes a motor switching assembly having a solid state contactor with a plurality of solid state switches. The motor switching assembly also includes at least one direct current (DC) link coupled to the solid state contactor and redundant first and second inverters coupled to the at least one DC link. The motor switching assembly further includes a first relay coupled between the solid state contactor and an input of the inverter and a second relay coupled between the solid state contactor and an input of the second inverter. In addition, the motor control system includes a control system programmed to control the motor switching assembly to selectively supply power to the load from the power source.

公开(公告)号：US20170288598A1

公开(公告)日：2017-10-05

申请号：US15085446

申请日：2016-03-30

Applicant: Eaton Corporation

Inventor： Xiaomeng Cheng ,  Huaqiang Li ,  Peijun Zhu ,  Dongxiao Wu ,  Kayle Wang ,  Qian Zhang

IPC: H02P29/10 ,  H02P27/08

CPC classification number: H02P29/10 ,  G05B11/36 ,  H02P6/08 ,  H02P27/08

Abstract: 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.

公开(公告)号：US09673695B1

公开(公告)日：2017-06-06

申请号：US15163411

申请日：2016-05-24

Applicant: Eaton Corporation

Inventor： Xiaoling Li ,  Huaqiang Li ,  Robert Fenton ,  Zhiguo Lu ,  Belly Lei

IPC: H02M1/32 ,  H02M5/45 ,  H02M1/44 ,  G01R19/165

CPC classification number: H02M7/125 ,  H02H7/1216

Abstract: An ASD circuit includes an input, solid-state switch rectifier bridge, DC link, and DC link capacitor bank. A pre-charge circuit is coupled between the input and the DC link capacitor bank and includes pre-charge relays operable in an on state that allows the AC power input to power the rectifier bridge during a normal operating state and an off state that allows the AC power input to pre-charge the DC link capacitor bank through a pre-charge resistor of the pre-charge circuit during a pre-charge operating state. A protection relay of a protection circuit is coupled between the pre-charge relays and the DC link capacitor bank, the protection relay operable in an on state that prevents the pre-charge circuit from connecting to the DC link capacitor bank when a capacitor short circuit occurs and an off state that allows the pre-charge circuit to electrically connect to the DC link capacitor bank.

公开(公告)号：US09667177B1

公开(公告)日：2017-05-30

申请号：US14969872

申请日：2015-12-15

Applicant: Eaton Corporation ,  Zhejiang University

Inventor： Huaqiang Li ,  Wenxi Yao ,  Zhengyu Lu

IPC: H02P1/26 ,  H02P27/06

CPC classification number: H02P1/265 ,  H02M5/00 ,  H02P27/06

Abstract: 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.

公开(公告)号：US09568209B2

公开(公告)日：2017-02-14

申请号：US13873716

申请日：2013-04-30

Applicant: Eaton Corporation

Inventor： Ravishankar Shivsharan Rugge ,  Huaqiang Li ,  Robert Fenton

IPC: F24F11/04 ,  F24F11/00

CPC classification number: F24F11/04 ,  F24F11/0079 ,  F24F11/46 ,  F24F11/74 ,  F24F11/77 ,  F24F2011/0042 ,  F24F2011/0047 ,  F24F2011/0075 ,  F24F2110/40 ,  F24F2140/60 ,  Y02B30/746

Abstract: A ventilation system includes first and second blowers connected to a plenum in parallel, with a first motor drive to control a speed of an electric motor of the first blower and a second motor drive to control a speed of an electric motor of the second blower. A controller associated with the first blower is programmed to receive a set point for a controlled variable that is controllable by operation of the first and second blowers, estimate a total air flow required from the first and second blowers to reach the controlled variable set point, calculate a blower speed ratio between a first blower speed and a second blower speed that provides the required total air flow at a minimum power consumption level, and generate commands to cause the first blower and the second blower to operate at speeds resulting in the calculated blower speed ratio.

Abstract translation: 通风系统包括并联连接到集气室的第一和第二鼓风机，第一电动机驱动器用于控制第一鼓风机的电动机的速度和用于控制第二鼓风机的电动机的速度的第二电动机驱动器。 与第一鼓风机相关联的控制器被编程为接收由第一和第二鼓风机的操作控制的受控变量的设定点，估计从第一和第二鼓风机到达受控变量设定点所需的总气流量， 计算在最小功耗水平下提供所需总气流的第一鼓风机速度和第二鼓风机速度之间的鼓风机速比，并且产生使第一鼓风机和第二鼓风机以导致所计算的鼓风机 转速比。