公开(公告)号：US11933290B2

公开(公告)日：2024-03-19

申请号：US17886693

申请日：2022-08-12

Applicant: Caterpillar Inc.

Inventor： Arick Bakken ,  Paul John Cairns ,  William Christopher Swick

IPC: F04B1/324 ,  F04B1/146 ,  F04B1/188 ,  F04B49/06 ,  F04B49/12

CPC classification number: F04B49/065 ,  F04B1/146 ,  F04B1/188 ,  F04B1/324 ,  F04B49/12 ,  F04B2201/0201 ,  F04B2203/0201 ,  F04B2203/0209 ,  F04B2205/05

Abstract: An axial piston pump controller for an axial piston pump having a fixed valve plate and a variable displacement is provided. The axial piston pump controller is configured to determine a displacement of the axial piston pump, and to calculate a pump displacement control current to be supplied to the axial piston pump to control the displacement of the axial piston pump. Calculating the pump displacement control current comprises calculating a nominal value for the pump displacement control current based on a rotational speed of the axial piston pump, calculating a pump stiffness adjustment factor based on a pump stiffness control map having as inputs: an output pressure of the axial piston pump; and the estimated pump displacement, and calculating the pump displacement control current to be supplied to the axial piston pump based on the nominal value and the pump stiffness adjustment factor. The controller is further configured to output an instruction to output the calculated pump displacement control current to the axial piston pump in order to control the displacement of the axial piston pump.

公开(公告)号：US20230358240A1

公开(公告)日：2023-11-09

申请号：US18025949

申请日：2021-08-25

Applicant: Brinkmann Pumpen K.H. Brinkmann GmbH & Co. KG

Inventor： Dirk Wenderott ,  Andreas Vedral

IPC: F04D15/00 ,  G01R15/20 ,  F04B17/03 ,  F04D13/06

CPC classification number: F04D15/0088 ,  G01R15/202 ,  F04B17/03 ,  F04D13/0693 ,  F04B2203/0201 ,  F04B2203/0202 ,  F04B2201/0801 ,  F04B2201/0804 ,  F04B2203/0205

Abstract: A pump having an electric motor (14) and an electronic monitoring circuit (30) arranged in a housing part (26) of the motor, for monitoring and recording operating parameters of the pump, one of the operating parameters being the current consumption of the pump, the monitoring circuit (30) having a digital current and voltage measuring circuit (34) which is integrated in a semiconductor component and has at least one Hall sensor (36) for measuring current.

公开(公告)号：US11808261B2

公开(公告)日：2023-11-07

申请号：US17285802

申请日：2018-12-14

Applicant: GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI

Inventor： Hua Liu ,  Longfei Li ,  Handong Xue ,  Yi Ni ,  Yingsheng Fu ,  Yaopeng Rong ,  Zhongqiu Zhang ,  Qunbo Liu ,  Ke Xu

IPC: F04B51/00 ,  F04B25/00 ,  F04B49/06 ,  F04C23/00 ,  F04C28/06 ,  F04C28/08 ,  F04C28/28 ,  F04B41/00 ,  F04C18/356 ,  F04C18/344 ,  F04C28/02

CPC classification number: F04B51/00 ,  F04B25/005 ,  F04B49/065 ,  F04C23/001 ,  F04C28/065 ,  F04C28/08 ,  F04C28/28 ,  F04B41/00 ,  F04B2203/0201 ,  F04B2203/0204 ,  F04C18/344 ,  F04C18/356 ,  F04C28/02 ,  F04C2270/075 ,  F04C2270/095

Abstract: Disclosed are a variable capacity compressor operation mode determination method and device, a variable capacity compressor and an air conditioner. The variable capacity compressor operation mode determination method includes: detecting a current value of a compressor at present as A1 before switching an operation mode of the compressor; detecting the current value of the compressor at present as A2 after switching the operation mode of the compressor and reaching a preset time; comparing A1 and A2, determining that the switching of the operation mode of the compressor is successful when a ratio relationship between A1 and A2 satisfies a preset condition, and determining that switching of the operation mode of the compressor is failed when the ratio relationship between A1 and A2 dissatisfies a preset condition.

公开(公告)号：US11754084B2

公开(公告)日：2023-09-12

申请号：US16805975

申请日：2020-03-02

Applicant: MINEBEA MITSUMI Inc.

Inventor： Masato Aoki ,  Yuji Omura ,  Takahiro Suzuki

IPC: F04D27/00 ,  F04D25/06 ,  H02P29/04 ,  F04D29/66 ,  F04B49/06

CPC classification number: F04D27/004 ,  F04D25/06 ,  H02P29/045 ,  F04B49/065 ,  F04B2203/0201 ,  F04B2203/0209 ,  F04B2203/0211 ,  F04D29/66

Abstract: A motor drive control device has a control circuit that generates a drive control signal for controlling a rotational speed of a motor based on a speed command signal indicating a target rotational speed of the motor, and a motor driving unit that drives the motor based on the drive control signal. The control circuit performs speed feedback control for generating the drive control signal so that the rotational speed of the motor coincides with the target rotational speed when the target rotational speed is lower than a rotational speed threshold value, and generates the drive control signal based on a relationship between current flowing through the motor and a reference current value when the target rotational speed is higher than the rotational speed threshold value.

公开(公告)号：US20190234398A1

公开(公告)日：2019-08-01

申请号：US16318831

申请日：2017-06-28

Applicant: AISIN SEIKI KABUSHIKI KAISHA

Inventor： Kazutaka ENDO

IPC: F04B49/06

CPC classification number: F04B49/06 ,  F04B17/03 ,  F04B49/02 ,  F04B49/065 ,  F04B2201/1202 ,  F04B2203/0201 ,  F04B2203/0209 ,  F04B2205/05 ,  F04B2205/06

Abstract: An electric oil pump device includes an electric oil pump driven by a motor and a microcomputer that adjusts a control parameter of feedback control related to a motor current value or a motor rotation speed based on an oil temperature estimated based on a relationship between at least one of a hydraulic pressure, the motor current value, or a torque of the electric oil pump and at least one of an oil discharge amount or the motor rotation speed of the electric oil pump.

公开(公告)号：US20180306188A1

公开(公告)日：2018-10-25

申请号：US15952341

申请日：2018-04-13

Applicant: Abac Aria Compressa S.p.A.

Inventor： Maarten Van Acker

IPC: F04C28/06 ,  F04B49/06

CPC classification number: F04C28/06 ,  F04B35/04 ,  F04B37/14 ,  F04B49/065 ,  F04B2201/1203 ,  F04B2203/0201 ,  F04B2205/05 ,  F04C18/16 ,  F04C28/28 ,  F04C2240/40 ,  F04C2270/07 ,  F04C2270/18

Abstract: A compressor provided with a compressor element, a motor configured to drive said compressor element and an electronic pressure switch. The electronic pressure switch includes a pressure sensor; a current sensor; a microprocessor unit including a first input port and a second input port; a first communication unit; and a second communication unit. The electronic pressure switch includes a housing. The microprocessor unit, the pressure sensor, the current sensor, the first communication unit and the second communication unit are integrated in said housing.

公开(公告)号：US10003277B2

公开(公告)日：2018-06-19

申请号：US15511289

申请日：2015-08-05

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Yasutaka Taguchi ,  Junya Mitsui ,  Akira Moriguchi

IPC: H02M7/155 ,  H02M1/12 ,  H02M5/458 ,  H02M1/32 ,  H02M1/44

CPC classification number: H02M7/1557 ,  F04B35/04 ,  F04B39/02 ,  F04B49/06 ,  F04B49/103 ,  F04B49/20 ,  F04B2203/0201 ,  F04B2203/0209 ,  F24F11/89 ,  F25B1/00 ,  F25B13/00 ,  F25B49/022 ,  F25B2600/021 ,  F25B2600/0253 ,  F25B2700/151 ,  H02M1/12 ,  H02M1/32 ,  H02M1/44 ,  H02M5/458 ,  H02M7/48 ,  H02M2001/123 ,  H02P6/06 ,  Y02B30/741 ,  Y02B40/32

Abstract: A power converter including a compressor as a load includes a compensation current output (80) allowing compensation current (Ic), which compensates for leakage current (Ia), to flow. A controller (50) receives a detection signal from a rotational speed sensor (55) which senses the rotational speed of the compressor (CM). When the rotational speed has increased to a set rotational speed at which the leakage current (Ia) is lower than or equal to its limiting value (Lmax) (e.g., the limiting value specified under the Electrical Appliances and Materials Safety Act or by the IEC) in a state where the compensation current output (80) is off, the compensation current output (80) is switched from an on state to an off state. This may reduce the leakage current from the compressor with low power loss.

公开(公告)号：US20180126844A1

公开(公告)日：2018-05-10

申请号：US15569029

申请日：2016-04-25

Applicant: Continental Automotive GmbH

Inventor： Gerald BEHRENDT

IPC: B60K15/077

CPC classification number: B60K15/077 ,  B60K2015/03243 ,  F02D41/3082 ,  F02M37/08 ,  F04B49/065 ,  F04B2203/0201 ,  F04B2203/0209 ,  F04B2205/05 ,  F04D15/0088 ,  F05D2260/821 ,  F05D2270/304 ,  F05D2270/335

Abstract: A method for determining a pressure value in a fluid conveying system of a motor vehicle, the vehicle having an actuable electric motor and having a fluid feed pump drivable by the electric motor, includes: determining a rotational speed of the electric motor; determining an actuation current of the electric motor; acquiring a pressure value as a function of the determined rotational speed and the determined actuation current of the electric motor; processing the acquired pressure value with at least one external state variable in a controller; and correcting the acquired pressure value.

公开(公告)号：US20180111146A1

公开(公告)日：2018-04-26

申请号：US15793809

申请日：2017-10-25

Applicant: Carlisle Fluid Technologies, Inc.

Inventor： Christopher Lee Strong

IPC: B05B12/00 ,  B05B1/20 ,  B05B7/24 ,  B65D83/00 ,  B05B15/12 ,  B05B12/08

CPC classification number: B05B12/008 ,  B05B1/202 ,  B05B7/2489 ,  B05B9/0406 ,  B05B9/0409 ,  B05B9/0413 ,  B05B12/006 ,  B05B12/085 ,  B05B12/088 ,  B05B12/1418 ,  B05B12/1472 ,  B05B16/25 ,  B65D83/005 ,  F04B49/04 ,  F04B49/06 ,  F04B2203/0201 ,  G01F23/74

Abstract: A system includes a material sensor system having an inlet and an outlet. The inlet receives a flow of a material and the outlet outputs the flow of the material. The material sensor system includes an inner cavity having a surface, where the inner cavity receives the flow of the material. The material sensor system also includes a float system having one or more floats, where the one or more floats float within the material of the inner cavity. The material sensor system also includes a switch that sends one or more signals to a control valve system when the float system engages the surface of the inner cavity.

公开(公告)号：US09762168B2

公开(公告)日：2017-09-12

申请号：US15096196

申请日：2016-04-11

Applicant: Emerson Climate Technologies, Inc.

Inventor： Hung M. Pham ,  Fadi M. Alsaleem

IPC: G01R31/34 ,  H02P25/04 ,  G01R31/02 ,  F04C28/28 ,  F04B35/04 ,  F04C29/00 ,  F04B49/06 ,  F04B49/10 ,  F25B49/02 ,  F04C18/02

CPC classification number: H02P25/04 ,  F04B35/04 ,  F04B49/06 ,  F04B49/10 ,  F04B2203/0201 ,  F04B2203/0202 ,  F04C18/02 ,  F04C18/0215 ,  F04C28/28 ,  F04C29/0085 ,  F04C2240/808 ,  F04C2240/81 ,  F04C2270/03 ,  F04C2270/07 ,  F04C2270/19 ,  F04C2270/22 ,  F04C2270/60 ,  F04C2270/80 ,  F04C2270/86 ,  F04C2270/90 ,  F25B49/022 ,  G01R31/028 ,  G01R31/343

Abstract: A refrigeration system includes a compressor and a capacitor electrically coupled to the compressor. A method of operating the refrigeration system includes measuring voltage values based on alternating current power powering the compressor. The method includes measuring current values based on the alternating current power. The method includes determining, with a controller, a power factor value based on at least one of the voltage values and at least one of the current values. The method includes receiving a supply air temperature value from an air temperature sensor installed in the refrigeration system. The method includes receiving a return air temperature value from an air temperature sensor installed in the refrigeration system. The method includes determining a temperature split based on a difference between the return and supply air temperature values. The method includes determining a fault in the capacitor based on the power factor value and the temperature split.