公开(公告)号：US10655621B2

公开(公告)日：2020-05-19

申请号：US14899992

申请日：2014-06-27

Applicant: EATON CORPORATION ,  Yilun Chen ,  Xiaomeng Cheng

Inventor： Yilun Chen ,  Xiaomeng Cheng

IPC: F04B49/06 ,  F04B17/03 ,  F04B49/08 ,  F04B49/20

Abstract: A control system and method of a VFD-based pump. The control system controls an electric motor via a VFD, and the electric motor drives the pump. The control system comprises: an anti-ripple injection module for injecting an anti-ripple signal into a control path, the anti-ripple signal causing pressure ripples in the pump output to be at least partially cancelled. Further a pump system, comprising: a VFD, an electric motor, and a pump, wherein the VFD comprises the control system stated above.

公开(公告)号：US10951149B2

公开(公告)日：2021-03-16

申请号：US14900033

申请日：2014-06-27

Applicant: EATON CORPORATION

Inventor： Yilun Chen ,  Xiaomeng Cheng

IPC: H02P21/22 ,  H02M7/5387 ,  H02P23/00 ,  F04B49/06 ,  H02P27/08

Abstract: The present invention disclose a method and apparatus for pulse-width modulation (PWM) of a variable-frequency drive (VFD), the method comprising: for each sector of a space vector graph for PWM of the VFD, identifying at least two possible clamping phases in switching between the vectors in the sector; comparing currents in multiple phases in at least one PWM cycle; in the sector of the space vector graph corresponding to the PWM cycle, determining the possible clamping phase with the maximum current in the at least two possible clamping phases; and clamping the determined possible clamping phase with the maximum current.

公开(公告)号：US10527035B2

公开(公告)日：2020-01-07

申请号：US14900010

申请日：2014-06-27

Applicant: EATON CORPORATION

Inventor： Yilun Chen ,  Xiaomeng Cheng

IPC: F04B49/06 ,  F04B49/10 ,  F04B17/03 ,  F04B49/08 ,  F04B49/20 ,  F04C14/08 ,  F04C15/00

Abstract: An anti-ripple injection method for injecting an anti-ripple signal into a control system of a pump is disclosed. The control system controls an electric motor via an electric motor drive, and the electric motor drives the pump. The anti-ripple signal causes pressure ripples in the pump output to be at least partially cancelled. The anti-ripple injection method includes: injecting an anti-ripple signal of any waveform into the control system, the anti-ripple signal being represented by the following equation: f(θ)=ΣmAm cos(mθ+θm), wherein θ is the rotation angle of the motor shaft, m is the order of a signal harmonic in the anti-ripple signal, Am and θm are parameters with respect to the mth signal harmonic. A control system of a pump including the anti-ripple injection apparatus, and a pump system including the control system are also disclosed.

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：US10458403B2

公开(公告)日：2019-10-29

申请号：US14900044

申请日：2014-06-27

Applicant: EATON CORPORATION

Inventor： Yilun Chen ,  Xiaomeng Cheng

IPC: F04B49/06 ,  F04B19/22 ,  F04B51/00 ,  F04B17/03

Abstract: A servo pump control system (100) and a corresponding servo pump control method are disclosed. The servo pump control system (100) comprises a pressure controller (101) configured to receive a first control signal, and directly or indirectly provide a second control signal to the electric motor; and the pressure controller (101) configured to automatically commission at least one parameter without any manual adjustment.

公开(公告)号：US10333455B2

公开(公告)日：2019-06-25

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 ,  G05B19/00 ,  H02P6/08

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.