WO2009127397A1 - Système de commande électrohydraulique - Google Patents

Système de commande électrohydraulique Download PDF

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Publication number
WO2009127397A1
WO2009127397A1 PCT/EP2009/002743 EP2009002743W WO2009127397A1 WO 2009127397 A1 WO2009127397 A1 WO 2009127397A1 EP 2009002743 W EP2009002743 W EP 2009002743W WO 2009127397 A1 WO2009127397 A1 WO 2009127397A1
Authority
WO
WIPO (PCT)
Prior art keywords
controller
speed
control arrangement
setpoint
drive
Prior art date
Application number
PCT/EP2009/002743
Other languages
German (de)
English (en)
Inventor
Gerold Liebler
Albert Koeckemann
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2009127397A1 publication Critical patent/WO2009127397A1/fr

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/20—Control of fluid pressure characterised by the use of electric means
    • G05D16/2006—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means
    • G05D16/2066—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using controlling means acting on the pressure source
    • 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
    • F04B49/002—Hydraulic systems to change the pump delivery
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D7/00—Control of flow
    • G05D7/06—Control of flow characterised by the use of electric means
    • G05D7/0617—Control of flow characterised by the use of electric means specially adapted for fluid materials
    • G05D7/0629—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means
    • G05D7/0676—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by action on flow sources
    • 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
    • F04B2201/00—Pump parameters
    • F04B2201/12—Parameters of driving or driven means
    • F04B2201/1201—Rotational speed of the axis
    • 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
    • F04B2203/0209—Rotational speed

Definitions

  • the invention relates to an electro-hydraulic control arrangement for controlling a hydraulic consumer according to the preamble of patent claim 1.
  • Electro-hydraulic drives come e.g. For applications in which high actuating forces with small dimensions of the actuators and precise control of the hydraulically adjusted machine part is required.
  • a concept for the control of the hydraulic consumers of an injection molding machine is shown in the applicant's EP 0 403 041 A2.
  • a constant displacement pump is directly connected to a hydraulic load in the manner of a hydraulic power / travel ratio.
  • the fixed displacement pump is actuated by means of a variable speed, electric servo drive.
  • the speed control loop of the servo drive is subordinate to a position control or a pressure control of the consumer.
  • Units for closing the mold and for the material feed in the injection device and for driving a screw are controlled by means of a variable displacement pump and a valve unit.
  • the variable displacement is in the known manner in the context of a flow control or a Pressure control operated.
  • Variable displacement pumps with an associated control unit are offered by Bosch Rexroth AG under the name SYDFEE - see data sheet RE 30630 / 06.06.
  • the drive described in the aforementioned patent also has a variable speed electric motor for driving the variable displacement pump.
  • the need for pressure medium, ie the required delivery rate of the variable displacement pump is for the individual phases of the
  • EP 1 236 558 B1 discloses an electrohydraulic drive for a cyclically operated machine in which a variable displacement pump and a variable speed electric motor for driving the pump are combined.
  • the speed of the electric motor is determined in a learning phase from the pressure setpoint specifications and from the flow rate setpoint specifications during a machine cycle. In the learning phase, the electric motor runs at the highest rated speed and p / Q control is only performed by the pump controller. After the learning phase, the speed of the engine is varied within the engine cycle, with the proviso to be able to meet the respective pressure setpoint specifications and flow setpoint specifications with reduced engine speed.
  • an electro-hydraulic control arrangement with the features of claim 1.
  • an electrohydraulic control arrangement with an adjustable fluid pump and a coupled variable-speed electrical drive, with a p / Q controller which is set up to provide a drive control value for the displacement volume of the fluid pump on the basis of a pressure setpoint and / or a volumetric flow setpoint a speed input element which - for example due to a p / Q- Request cycle - provides a speed setpoint, and with a drive control unit, which drives a motor of the electric drive based on the speed setpoint, at least the p / Q controller and the speed selection element in a common housing structurally summarized.
  • a compact structural unit is made available, which can control both the actuator of the variable displacement pump - usually a pilot valve - as well as the drive control unit of the electric drive.
  • the cabling effort is significantly lower compared to a separate arrangement of p / Q controller and speed selection element.
  • signals include e.g. Pressure values (p), flow rate values (Q) or a swivel angle signal (a) of the variable displacement pump or a control control value for the pilot valve, a speed (n) or a torque required on the variable displacement pump.
  • Setpoints and actual values can be taken into account.
  • a single interface can be provided, which moreover corresponds as far as possible to the interface of the conventional p / Q controller - see the aforementioned data sheet RE 30630 / 06.06.
  • the p / Q controller and the speed selection element are combined in a common electronic unit, in particular a single electronic circuit.
  • the p / Q controller and the speed selection element are preferably implemented in a single microcontroller. This allows particularly easy access of both components to the commonly used control and regulation parameters.
  • the p / Q controller, the speed selection element and a valve amplifier, which controls a pilot valve of the variable displacement pump are common to one another Housing summarized.
  • a particularly advantageous variant is the integration of said components into an electronic unit arranged on the pilot valve - a so-called on-board electronic unit (OBE).
  • OBE on-board electronic unit
  • the p / Q controller and speed selector member share a common interface with a higher level machine controller, e.g. a PLC or a PLC.
  • a higher level machine controller e.g. a PLC or a PLC.
  • the interface preferably corresponds largely to the interface of a conventional p / Q controller, i. it will
  • the interface may be analog or digital, e.g. be executed as a fieldbus. This facilitates each of the control of the control arrangement according to the invention by the higher-level machine control.
  • the speed defaulting member due to one of the above
  • a possibly required synchronization signal which is e.g. indicates a start of the machine cycle, can be provided by the higher-level machine control with little effort.
  • a synchronization signal is e.g. when using a learning cycle, as described in EP 1 236 558 B1 helpful.
  • the synchronization signal may also be e.g. be used so that the p / Q controller tells the machine control when a certain control state is reached.
  • FIG. 1 is a simplified circuit diagram of a hydraulic control for a hydraulic consumer with a variable displacement pump, with a variable-speed electric drive and with a drive circuit for the drive control unit of the electric drive, which is integrated in a valve electronics of the pilot valve,
  • Fig. 2 shows a variant of the hydraulic control of Figure 1, in which a controller for the variable displacement pump is integrated in the drive control unit, and
  • FIG. 3 shows a modification of the hydraulic shown in Figures 1 and 2
  • Drive control unit can control.
  • FIG. 1 shows a hydraulic axis 1 of a stationary production machine.
  • one or more hydraulic consumers 3 are supplied by a hydraulic control 5 with pressure medium.
  • the hydraulic control 5 is in turn controlled by a higher level machine controller 7, e.g. a programmable logic controller (PLC) or a logic controller (PLC), by means of setpoint specifications 8 with respect to the delivered to the consumer 3 flow rate Q_soll or the pressure to be provided p_soll driven.
  • the hydraulic control 5 comprises an electric motor 10, which drives the variable displacement pump 12.
  • the electric motor 10 - e.g. an asynchronous motor - is controlled by a drive control unit 14 whose main component is an inverter FU.
  • the input of the drive control device 14 is a target speed of the electric motor 10.
  • the drive control device 14 outputs a three-phase current corresponding frequency f_soll.
  • a pilot valve 16 On the housing of the variable displacement pump 12, a pilot valve 16 is attached, which hydraulically actuates the adjusting mechanism 12 of the variable displacement pump 12.
  • the pilot valve 16 is usually an electromagnetically actuated 3/2-way proportional valve.
  • a valve electronics 18 At the pilot valve 16, possibly at the solenoid of the pilot valve 16 is a valve electronics 18, a so-called Ob Board Electronics OBE befes- Untitled.
  • a speed selection element 22 and a valve amplifier 24 are integrated.
  • the only interface 26 between the illustrated hydraulic control 5 and the machine control 7 is also located on the valve electronics 18.
  • the p / Q controller 20 generates among other things by means of the setpoints Q_soll and p_soll a control signal Ventil_soll for the pilot valve 16, which the valve amplifier 24th is supplied to actuate the pilot valve 16.
  • the speed selection element 22 generates, inter alia, by means of the setpoint values Q_setpoint and p_setpoint a speed setpoint speed_setpoint which is supplied to the drive control device 14.
  • Other parameters that can be used as a basis for determining the actuating signals are, for example, a pressure actual value, a delivery actual value or a swivel angle signal (a) of the variable displacement pump or a control control value for the pilot valve, a rotational speed (n) or a torque required on the variable displacement pump.
  • the valve electronics 18 is a digital control circuit which has a microcontroller.
  • the p / Q controller 20 and the speed selection element 22 are implemented as application programs on the microcontroller. This makes it possible to implement a large number of variants for the regulating and control behavior of the valve electronics 18 and to optimally adapt the system of the hydraulic control 5 to the machine characteristics. In addition, the acquired control parameters are readily available to all application programs.
  • a data exchange between p / Q controller 20 and speed selector member 22 is very simple - without cabling.
  • the p / Q controller 20 as an analog controller and to implement the speed select element 22 with a very simple microcontroller or programmable logic (e.g., FPGA).
  • a very simple microcontroller or programmable logic e.g., FPGA
  • the valve electronics is constructed in a simpler manner according to the second exemplary embodiment and substantially comprises the valve amplifier 24. This can be attached to the pilot valve 16 or be provided separately as a control cabinet module.
  • the drive control unit 34 has extended functionality compared to the drive control unit 14. It not only serves the electronic control of the inverter FU but also includes the p / Q controller 20 and the speed selection member 22. The only interface 26 of the illustrated hydraulic control 5 to the higher-level machine control 7 is on
  • the p / Q controller 20 forms the control value valve_soll for the pilot valve 16. This value is supplied to the valve amplifier 24.
  • the speed selection element 22 forms the speed setpoint speed_soll, which serves to drive the converter FU within the drive control unit 34.
  • a microcontroller which is usually present in the drive control device 34 is designed such that it can execute not only the control of the converter FU but also the p / Q controller 20 and the speed selection element 22 as applications. If a very simple microcontroller is used in the drive control unit 34, the p / Q controller 20 could be used as an analog controller in the drive control unit. Er choir 34, ie be integrated in the electronic circuit or in the housing.
  • FIG. 3 A third exemplary embodiment is shown in FIG. 3. This, in turn, differs in particular with regard to the arrangement of individual components of the exemplary embodiments described above. The basic structure, the functionality and the described modifications can be transferred.
  • valve electronics is simple according to the third embodiment and essentially comprises the valve amplifier 24. This may be attached to the pilot valve 16 or be provided separately as a control cabinet module. Also, the valve control unit 14 has a simple structure and includes, as described in the first embodiment, predominantly the inverter FU and its control electronics.
  • the p / Q controller 20 and the speed selection element 22, however, are provided in separate separate control electronics 40.
  • the control electronics 40 has the only interface 26 of the illustrated hydraulic control 5 to the higher-level machine control system 7.
  • the p / Q controller 20 forms the control valve_soll for the pilot valve 16. This value is supplied to the valve amplifier 24.
  • the speed specification element 22 forms the speed specification value speed_soll, which is supplied to the drive control unit 14.
  • the control electronics 40 is an electronic module, e.g. for the control cabinet installation. It includes a microcontroller which can execute the p / Q controller 20 and speed selector member 22 as applications.
  • the p / Q controller 20 as an analog controller and to implement the speed select element 22 with a very simple microcontroller or programmable logic (e.g., FPGA).
  • the p / Q controller 20 and speed selector member 22 are mounted on a board or on e.g. by means of plug contacts connected boards, housed in the housing of the control electronics 40.
  • an electro-hydraulic control arrangement with an adjustable fluid pump and a coupled variable-speed electrical pump see drive, with a p / Q controller, which is adapted to provide a Antechnischstellwert for the displacement volume of the fluid pump due to a pressure setpoint and / or a volumetric flow setpoint, with a Drehierevorgabeglied which - eg due to a P / Q request cycle - provides a speed command value, and with a drive control device, which is a motor of the electric drive due to the

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

L'invention concerne un système de commande électrohydraulique (1) comprenant une pompe à fluide (12) réglable et un mécanisme d'entraînement électrique (10) à vitesse de rotation variable couplé avec, un régulateur p/Q (20) qui est conçu pour fournir, sur la base d'une valeur de pression de consigne et/ou d'une valeur de flux volumique de consigne, une valeur de réglage pour le volume de refoulement de la pompe à fluide, un organe de transmission de vitesse de rotation (22) qui fournit, par exemple en raison d'un cycle de demande de p/Q, une valeur de rotation de consigne, et un appareil de commande de l'entraînement (14) qui assure la commande d'un moteur du mécanisme d'entraînement électrique en fonction de la valeur de consigne de rotation, au moins le régulateur p/Q et l'organe de transmission de vitesse de rotation sont regroupés physiquement au sein d'un boîtier (18) commun.
PCT/EP2009/002743 2008-04-17 2009-04-15 Système de commande électrohydraulique WO2009127397A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008019501.4A DE102008019501B4 (de) 2008-04-17 2008-04-17 Elektrohydraulische Steueranordnung
DE102008019501.4 2008-04-17

Publications (1)

Publication Number Publication Date
WO2009127397A1 true WO2009127397A1 (fr) 2009-10-22

Family

ID=40940133

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/002743 WO2009127397A1 (fr) 2008-04-17 2009-04-15 Système de commande électrohydraulique

Country Status (3)

Country Link
CN (1) CN201461564U (fr)
DE (1) DE102008019501B4 (fr)
WO (1) WO2009127397A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2520349A (en) * 2013-11-19 2015-05-20 Ge Oil And Gas Uk Ltd Hydraulic fluid pressure control

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012002586A1 (fr) * 2010-06-28 2012-01-05 볼보 컨스트럭션 이큅먼트 에이비 Système de commande d'écoulement pour une pompe hydraulique de machine de construction
DE102010027183A1 (de) * 2010-07-14 2012-01-19 Robert Bosch Gmbh Hydroaggregat
DE102011014605A1 (de) 2011-03-22 2012-09-27 Robert Bosch Gmbh Verfahren zum Beschichten, Polrohr und Vorrichtung zum Durchführen des Verfahrens
DE102011119299A1 (de) * 2011-11-24 2013-05-29 Robert Bosch Gmbh Verfahren zum Betreiben einerdrehzahlvariablen Verstellpumpe
DE102012009136A1 (de) * 2012-05-05 2013-11-07 Robert Bosch Gmbh Verfahren zum Betreiben einer Fluidpumpe
DE102012023902B3 (de) * 2012-12-07 2014-03-20 Arburg Gmbh + Co. Kg Verfahren zum Betrieb einer Hydraulikeinrichtung mit Pumpe und Servomotor sowie zugehörige Hydraulikeinrichtung
DE102014001981B4 (de) * 2014-02-17 2023-04-27 Robert Bosch Gmbh Dynamischer Sollwertausgleich bei drehzahlvariablen Verstellpumpen
DE102017222761A1 (de) 2017-12-14 2019-06-19 Robert Bosch Gmbh Hydraulische Versorgungseinrichtung
DE102019118723A1 (de) * 2019-07-10 2021-01-14 Ipgate Ag Druckversorgungseinheit für ein Hydrauliksystem mit mindestens einem Verbraucherkreis und mit mindestens einer Rotationspumpe
CN114251256A (zh) * 2020-09-23 2022-03-29 博世力士乐（常州）有限公司 具有自动挡位控制功能的多挡泵
DE102021201895A1 (de) 2021-03-01 2022-09-01 Robert Bosch Gesellschaft mit beschränkter Haftung Verfahren zum Betreiben einer drehzahlvariablen, elektrohydraulischen Pumpe, Recheneinheit und drehzahlvariable elektro-hydraulische Pumpe
CN114294210A (zh) * 2021-12-23 2022-04-08 博世力士乐（常州）有限公司 具有延时挡位切换功能的多挡泵

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5307288A (en) * 1991-06-07 1994-04-26 Haines Lawrence A Unitary fluid flow production and control system
DE4335403C1 (de) * 1993-10-18 1994-12-15 Karl Hehl Hydraulikeinrichtung
EP1126178A2 (fr) * 2000-02-16 2001-08-22 WILO GmbH Système de contrôle pour unité pompe-vanne
EP1236558A1 (fr) * 2001-03-03 2002-09-04 Mannesmann Rexroth AG Methode de régulation de l'alimentation en fluide d'un actionneur hydraulique

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3919823C3 (de) 1989-06-14 1998-04-09 Mannesmann Ag Spritzgießmaschine mit hydraulischen Verbrauchern
US5052909A (en) 1990-01-19 1991-10-01 Cincinnati Milacron Inc. Energy-conserving injection molding machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5307288A (en) * 1991-06-07 1994-04-26 Haines Lawrence A Unitary fluid flow production and control system
DE4335403C1 (de) * 1993-10-18 1994-12-15 Karl Hehl Hydraulikeinrichtung
EP1126178A2 (fr) * 2000-02-16 2001-08-22 WILO GmbH Système de contrôle pour unité pompe-vanne
EP1236558A1 (fr) * 2001-03-03 2002-09-04 Mannesmann Rexroth AG Methode de régulation de l'alimentation en fluide d'un actionneur hydraulique

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2520349A (en) * 2013-11-19 2015-05-20 Ge Oil And Gas Uk Ltd Hydraulic fluid pressure control

Also Published As

Publication number Publication date
DE102008019501A1 (de) 2009-10-22
CN201461564U (zh) 2010-05-12
DE102008019501B4 (de) 2019-03-21

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