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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
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.
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Patent Agency Ranking
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
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.
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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
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.
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公开(公告)号：US20160163441A1
公开(公告)日：2016-06-09
申请号：US14558902
申请日：2014-12-03
Applicant: EATON CORPORATION
Inventor： QIZHOU CHEN , Tianyu Chen , Li Yu , Yilun Chen , Jack Gu
CPC classification number: H01F7/064 , H01F7/081 , H01F7/1615
Abstract: A circuit for driving an actuator including a closing coil and an opening coil, the circuit including a first electrical switch, a second electrical switch, a third electrical switch, a first diode, a second diode, a third diode, and a capacitor electrically connected to a second terminal of the third electrical switch. The circuit is structured such that controlling the state of the first, second, and third transistors causes current flowing through the circuit to flow through one of the closing coil and the opening coil and to not flow through the other of the closing coil and the opening coil.
Abstract translation: 一种用于驱动包括闭合线圈和开启线圈的致动器的电路，所述电路包括第一电开关，第二电开关，第三电开关，第一二极管，第二二极管，第三二极管和电连接的电容器 到第三电开关的第二端子。 电路被构造成使得控制第一，第二和第三晶体管的状态导致电流流过电路流过闭合线圈和开启线圈中的一个，并且不流过闭合线圈和开口中的另一个 线圈
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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.
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公开(公告)号：US09478338B2
公开(公告)日：2016-10-25
申请号：US14558902
申请日：2014-12-03
Applicant: EATON CORPORATION
Inventor： Qizhou Chen , Tianyu Chen , Li Yu , Yilun Chen , Jack Gu
CPC classification number: H01F7/064 , H01F7/081 , H01F7/1615
Abstract: A circuit for driving an actuator including a closing coil and an opening coil, the circuit including a first electrical switch, a second electrical switch, a third electrical switch, a first diode, a second diode, a third diode, and a capacitor electrically connected to a second terminal of the third electrical switch. The circuit is structured such that controlling the state of the first, second, and third transistors causes current flowing through the circuit to flow through one of the closing coil and the opening coil and to not flow through the other of the closing coil and the opening coil.
Abstract translation: 一种用于驱动包括闭合线圈和开启线圈的致动器的电路，所述电路包括第一电开关，第二电开关，第三电开关，第一二极管，第二二极管，第三二极管和电连接的电容器 到第三电开关的第二端子。 电路被构造成使得控制第一，第二和第三晶体管的状态导致电流流过电路流过闭合线圈和开启线圈中的一个，并且不流过闭合线圈和开口中的另一个 线圈
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