EP0718496A3 - A variable assist electro-hydraulic system - Google Patents

A variable assist electro-hydraulic system Download PDF

Info

Publication number
EP0718496A3
EP0718496A3 EP95308558A EP95308558A EP0718496A3 EP 0718496 A3 EP0718496 A3 EP 0718496A3 EP 95308558 A EP95308558 A EP 95308558A EP 95308558 A EP95308558 A EP 95308558A EP 0718496 A3 EP0718496 A3 EP 0718496A3
Authority
EP
European Patent Office
Prior art keywords
electro
hydraulic system
variable assist
sensed
motor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP95308558A
Other languages
German (de)
French (fr)
Other versions
EP0718496A2 (en
Inventor
Matthew B. Dernier
Ulisses Duarte Camilo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lockheed Martin Corp
Original Assignee
Lockheed Martin Corp
Martin Marietta Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lockheed Martin Corp, Martin Marietta Corp filed Critical Lockheed Martin Corp
Publication of EP0718496A2 publication Critical patent/EP0718496A2/en
Publication of EP0718496A3 publication Critical patent/EP0718496A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2203/00—Motor parameters
    • F04B2203/02—Motor parameters of rotating electric motors
    • F04B2203/0201—Current
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2203/00—Motor parameters
    • F04B2203/02—Motor parameters of rotating electric motors
    • F04B2203/0202—Voltage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2207/00—External parameters
    • F04B2207/01—Load in general

Abstract

An electro-hydraulic system has at least one hydraulic load receiving pressurized fluid from a pump energized by an electric motor; the fluid flow/pressure characteristics are determined by motor speed, which is set by an electronic controller responsive to a motor/pump parameter sensed within the controller itself. No system parameter external to the electronic controller is required to be sensed to maintain system operation.
EP95308558A 1994-12-19 1995-11-28 A variable assist electro-hydraulic system Withdrawn EP0718496A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US35850694A 1994-12-19 1994-12-19
US358506 1994-12-19

Publications (2)

Publication Number Publication Date
EP0718496A2 EP0718496A2 (en) 1996-06-26
EP0718496A3 true EP0718496A3 (en) 1998-12-02

Family

ID=23409939

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95308558A Withdrawn EP0718496A3 (en) 1994-12-19 1995-11-28 A variable assist electro-hydraulic system

Country Status (1)

Country Link
EP (1) EP0718496A3 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9150076B2 (en) 2010-07-05 2015-10-06 Fluid Ride, Ltd. Suspension strut for a vehicle
US9574582B2 (en) 2012-04-23 2017-02-21 Fluid Ride, Ltd. Hydraulic pump system and method of operation

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5668328A (en) * 1996-07-17 1997-09-16 Applied Power Inc. Method and apparatus for hydraulically tightening threaded fasteners
DE19842565B4 (en) * 1998-09-03 2005-08-25 Ksb Ag Automatic determination of the PID controller parameters for a pressure control loop in multi-pump systems
DE10196072T1 (en) 2000-04-14 2003-07-03 Actuant Corp Variable speed hydraulic pump
US6935639B1 (en) * 2004-02-18 2005-08-30 Visteon Global Technologies, Inc. Mean pressure estimation for compressible fluid strut
FR2870570B1 (en) * 2004-05-21 2006-08-18 Koyo Hpi Soc Par Actions Simpl ELECTRO-PUMP GROUP SYSTEM PROVIDED WITH MEANS FOR LIMITING THE HYDRAULIC FLUID PRESSURE SUPPLIED BY THE PUMP
WO2009117765A1 (en) * 2008-03-26 2009-10-01 Techni Waterjet Pty Ltd Ultra high pressure pump with an alternating rotation to linear displacement drive mechanism
AT522933B1 (en) 2019-09-06 2021-04-15 Weber Hydraulik Gmbh Portable, battery-operated hydraulic power pack for hydraulic rescue tools

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4145161A (en) * 1977-08-10 1979-03-20 Standard Oil Company (Indiana) Speed control
DE3210082A1 (en) * 1981-04-02 1982-10-21 IWE Ingenieurgesellschaft für wirtschaftliche Energienutzung mbH, 6078 Neu-Isenburg Method and circuit arrangement for regulating the rotation speed of a pump motor
US5131507A (en) * 1989-06-15 1992-07-21 Mitsubishi Denki Kabushiki Kaisha Hydraulic elevator control apparatus using VVVF to determine the electric drive motor rotational speed
EP0557543A1 (en) * 1991-01-31 1993-09-01 Ranco Incorporated Of Delaware Variable speed motor control
EP0607888A1 (en) * 1993-01-21 1994-07-27 Still Gmbh Hydraulic steering control for an electric vehicle
US5467281A (en) * 1993-03-13 1995-11-14 Toyoda Koki Kabushiki Kaisha Controller for power steering apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4145161A (en) * 1977-08-10 1979-03-20 Standard Oil Company (Indiana) Speed control
DE3210082A1 (en) * 1981-04-02 1982-10-21 IWE Ingenieurgesellschaft für wirtschaftliche Energienutzung mbH, 6078 Neu-Isenburg Method and circuit arrangement for regulating the rotation speed of a pump motor
US5131507A (en) * 1989-06-15 1992-07-21 Mitsubishi Denki Kabushiki Kaisha Hydraulic elevator control apparatus using VVVF to determine the electric drive motor rotational speed
EP0557543A1 (en) * 1991-01-31 1993-09-01 Ranco Incorporated Of Delaware Variable speed motor control
EP0607888A1 (en) * 1993-01-21 1994-07-27 Still Gmbh Hydraulic steering control for an electric vehicle
US5467281A (en) * 1993-03-13 1995-11-14 Toyoda Koki Kabushiki Kaisha Controller for power steering apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9150076B2 (en) 2010-07-05 2015-10-06 Fluid Ride, Ltd. Suspension strut for a vehicle
US9574582B2 (en) 2012-04-23 2017-02-21 Fluid Ride, Ltd. Hydraulic pump system and method of operation

Also Published As

Publication number Publication date
EP0718496A2 (en) 1996-06-26

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