WO2012025086A2 - Method for starting an electric motor in a hydraulically operated working machine - Google Patents

Method for starting an electric motor in a hydraulically operated working machine Download PDF

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Publication number
WO2012025086A2
WO2012025086A2 PCT/DE2011/001531 DE2011001531W WO2012025086A2 WO 2012025086 A2 WO2012025086 A2 WO 2012025086A2 DE 2011001531 W DE2011001531 W DE 2011001531W WO 2012025086 A2 WO2012025086 A2 WO 2012025086A2
Authority
WO
WIPO (PCT)
Prior art keywords
electric motor
starting
hydraulic pump
stage
flow rate
Prior art date
Application number
PCT/DE2011/001531
Other languages
German (de)
French (fr)
Other versions
WO2012025086A3 (en
Inventor
Herbert Ziplies
Sebastian Fillinger
Original Assignee
Bucyrus Hex 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 Bucyrus Hex Gmbh filed Critical Bucyrus Hex Gmbh
Priority to AU2011295484A priority Critical patent/AU2011295484A1/en
Priority to US13/813,555 priority patent/US20130171007A1/en
Priority to EP11791194.1A priority patent/EP2601411A2/en
Priority to CN201180048168.4A priority patent/CN103154513B/en
Publication of WO2012025086A2 publication Critical patent/WO2012025086A2/en
Publication of WO2012025086A3 publication Critical patent/WO2012025086A3/en

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/2058—Electric or electro-mechanical or mechanical control devices of vehicle sub-units
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/2058—Electric or electro-mechanical or mechanical control devices of vehicle sub-units
    • E02F9/2062—Control of propulsion units
    • E02F9/207—Control of propulsion units of the type electric propulsion units, e.g. electric motors or generators
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/2058—Electric or electro-mechanical or mechanical control devices of vehicle sub-units
    • E02F9/2062—Control of propulsion units
    • E02F9/2075—Control of propulsion units of the hybrid type
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E02F9/2232—Control of flow rate; Load sensing arrangements using one or more variable displacement pumps
    • E02F9/2235—Control of flow rate; Load sensing arrangements using one or more variable displacement pumps including an electronic controller
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2296—Systems with a variable displacement pump
    • 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
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • 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
    • 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
    • F04B49/02—Stopping, starting, unloading or idling control
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
    • H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
    • H02P1/26—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual polyphase induction motor
    • 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
    • F04B2205/00—Fluid parameters
    • F04B2205/09—Flow through the pump

Definitions

  • the invention relates to a method for starting at least one asynchronous electric motor of a large hydraulic excavator with a service weight> 100 t according to the generic part of the first claim.
  • DE 198 04 043 A1 discloses a start-up circuit with start-up transformer for a three-phase motor, the starting circuit comprises contactors for setting a first start-up stage for starting the motor, with the contactors at least one further starting stage is adjustable, with the contactors further a Stage is adjustable for normal operation of the engine and wherein an electronic control device is provided for controlling the switching to the various stages in accordance with a determined motor current.
  • WO 2008/095525 A1 describes an electrohydraulic control arrangement for actuating a hydraulic consumer, comprising a fluid pump which can be adjusted with respect to its displacement volume, a fluid pump Driving the fluid pump to this coupled variable speed electric drive and a pressure detecting means for detecting a fluid pressure. It is provided a main control loop whose actuator is a speed control member of the electric drive and by the fluid pressure and / or a downstream control variable is detected and regulated, by means of a Maustellkette a displacement volume actuator of the fluid pump, in response to the detected fluid pressure, can be controlled.
  • the aim of the subject invention is to provide a method for starting at least one electric motor of a hydraulically operated large hydraulic excavator, which no longer has the indicated disadvantages, so that an approximately load-free starting of the at least one electric motor can be brought about.
  • the respective asynchronous electric motor is, according to another idea of the invention, put into operation using the known Korndorfer circuit.
  • the method according to the invention should advantageously be used in the area of an electrohydraulically driven large hydraulic excavator with a service weight of> 100 t.
  • the above-mentioned disadvantages are no longer given with the use of the subject invention.
  • the delivery rate of the hydraulic pump has the value 0 in each of the three starting phases of the electric motor. This also applies if the electric motor is already running at full speed. Only by actuating an actuator, e.g. Manual deflection of a hand lever, the advantageously designed as an axial piston pump hydraulic pump is pressurized via a pilot valve and only then is the flow rate increased to a value> 0 up to the maximum flow rate.
  • an actuator e.g. Manual deflection of a hand lever
  • Figures 1 to 5 are schematic diagrams of a circuit diagram for commissioning a hydraulic drive with electric motor.
  • FIG 1 shows the basic position (inoperative position), in which the voltage is present at an open switch 1 via the line 8.
  • the delivery quantity V of the hydraulic pump 13 has the value 0.
  • FIG. 2 shows the first switching stage of the starting process of an electric motor 6 of a hydraulic excavator not shown with a service weight> 100 t.
  • the switching elements 1 and 3 are closed. Due to the closed switching element 1, the electric current flows via electrical lines 8 and 9 to a transformer 2.
  • the switching element 3 to the neutral point 5 of the transformer 2 is closed. This has the consequence that at the tapping point 7 of the transformer 2, an electrical partial flow is discharged via electrical lines 10 and 12 to the electric motor 6.
  • the delivery rate V of the hydraulic pump 13 designed as an axial piston pump in this example also has the value 0.
  • FIG. 3 shows the second switching stage of the starting process.
  • the switching element 3 is opened to the star point 5 of the transformer 2.
  • the upper part of the transformer 2 now acts as a throttle.
  • the flow rate V of the hydraulic pump 13 remains at the value 0.
  • Figure 4 shows the third switching stage of the starting process of the electric motor 6. After a predetermined time, the switching element 4 is closed by a control unit 16 not described in detail. The nominal current is absorbed directly by the electric motor 6 via the closed switches 1 and 4. The electric motor is already applied in this switching position with its rated voltage. Also in this last switching stage, the flow rate V of the hydraulic pump 13 remains at the value 0.
  • Figure 5 now shows the addition of trained as axial piston pump hydraulic pump 13. The hand lever 22 of the actuator 21 is deflected and thus closes the switch 18.
  • a command sequence is triggered in the not further described electronic control unit 16, via the output 7 of the control unit 16 electronically controls a 15 such that a hydraulic flow, which is supported by an auxiliary pump 14, applied via the proportional valve 15 designed as a variable displacement hydraulic pump 13.

Abstract

The invention relates to a method for starting at least one asynchronous electric motor of a large hydraulic excavator having a service weight > 100 t and having an electrohydraulic drive, in that the particular electric motor is transferred from an idle position to an operating position by using a three-stage motor starting process, wherein the volumetric flow rate of at least one hydraulic pump operatively connected to the electric motor is set to the delivery rate V = 0 during all starting stages of the electric motor and the delivery rate V of the hydraulic pump is controlled to a value > 0 only after the last starting stage of the electric motor by activating an actuator.

Description

Verfahren zum Starten eines Elektromotors in einer hydraulisch betriebenen  Method for starting an electric motor in a hydraulically operated
Arbeitsmaschine  working machine
Die Erfindung betrifft ein Verfahren zum Starten mindestens eines Asynchron- Elektromotors eines Großhydraulikbaggers mit einem Dienstgewicht > 100 t gemäß gattungsbildendem Teil des ersten Patentanspruchs. The invention relates to a method for starting at least one asynchronous electric motor of a large hydraulic excavator with a service weight> 100 t according to the generic part of the first claim.
Die DE 86 02 103 beschreibt einen Hydraulikbagger mit einem mit Rädern oder Raupen versehenen, einen Unterwagen bildenden Fahrgestell, mit einem mit diesem um eine vertikale Achse drehbar verbundenen Oberwagen mit mindestens einem in dem Unter- oder Oberwagen angeordneten Elektromotor, der mindestens eine die hydraulischen Antriebe mit Druckmittel speisende Hydropumpe antreibt und mit einem mit dem Unterwagen verbundenen Kabel. DE 86 02 103 describes a hydraulic excavator with a provided with wheels or caterpillars, an undercarriage forming chassis, with a rotatably connected thereto about a vertical axis superstructure with at least one arranged in the lower or upper car electric motor, the at least one of the hydraulic drives with hydraulic pressure-powered hydraulic pump drives and with a cable connected to the undercarriage.
Der DE 198 31 121 A1 ist eine Anlaufschaltung mit Anlauftransformator für einen Drehstromkurzschlussläufermotor und mit Schaltschützen zur Einstellung mehrerer Anlaufstufen zu entnehmen, wobei zwischen je zwei Anlaufstufen in Form von Spannungsstufen Überschaltelemente aus einem Schütz und einer Drosselspule gesetzt sind. DE 198 31 121 A1 discloses a start-up circuit with starting transformer for a three-phase motor and with contactors for setting several starting stages to be set between each two starting stages in the form of voltage switching elements of a contactor and a choke coil.
Der DE 198 04 043 A1 ist eine Anlaufschaltung mit Anlauftransformator für einen Drehstromkurzschlussläufermotor zu entnehmen, wobei die Anlaufschaltung Schaltschütze zur Einstellung einer ersten Anlaufstufe für den Anlauf des Motors aufweist, wobei mit den Schaltschützen zumindest eine weitere Anlaufstufe einstellbar ist, wobei mit den Schaltschützen fernerhin eine Stufe für den Normalbetrieb des Motors einstellbar ist und wobei eine elektronische Steuereinrichtung zur Steuerung der Umschaltung in die verschiedenen Stufen nach Maßgabe eines ermittelten Motorstroms vorgesehen ist. DE 198 04 043 A1 discloses a start-up circuit with start-up transformer for a three-phase motor, the starting circuit comprises contactors for setting a first start-up stage for starting the motor, with the contactors at least one further starting stage is adjustable, with the contactors further a Stage is adjustable for normal operation of the engine and wherein an electronic control device is provided for controlling the switching to the various stages in accordance with a determined motor current.
In der WO 2008/095525 A1 wird eine elektrohydraulische Steueranordnung zur Ansteuerung eines hydraulischen Verbrauchers beschrieben, umfassend eine hinsichtlich ihres Verdrängungsvolumens verstellbare Fluidpumpe, einen zum Antreiben der Fluidpumpe an diese gekoppelten drehzahlvariablen elektrischen Antrieb sowie eine Druckerfassungseinrichtung zum Erfassen eines Fluiddrucks. Es ist ein Hauptregelkreis vorgesehen, dessen Stellglied ein Drehzahlstellglied des elektrischen Antriebs ist und durch den Fluiddruck und/oder eine nachgeordnete Stellgröße erfassbar und regelbar ist, wobei mittels einer Nebenstellkette ein Verdrängungsvolumenstellglied der Fluidpumpe, in Abhängigkeit von dem erfassten Fluiddruck, ansteuerbar ist. WO 2008/095525 A1 describes an electrohydraulic control arrangement for actuating a hydraulic consumer, comprising a fluid pump which can be adjusted with respect to its displacement volume, a fluid pump Driving the fluid pump to this coupled variable speed electric drive and a pressure detecting means for detecting a fluid pressure. It is provided a main control loop whose actuator is a speed control member of the electric drive and by the fluid pressure and / or a downstream control variable is detected and regulated, by means of a Nebenstellkette a displacement volume actuator of the fluid pump, in response to the detected fluid pressure, can be controlled.
Großhydraulikbagger, wie sie unter anderem in Minenbetrieben eingesetzt werden und die mit elektromotorischen Antrieben ausgerüstet sind, benötigen zum Anlassen des jeweiligen Elektromotors von dem Stromversorgungsunternehmen eine kurzzeitige Strommenge, die dem 4- bis 6-fachen des Motornennstroms entspricht. Um diesen hohen Energiebedarf ohne die Herbeiführung eines betreiberseitigen Netzzusammenbruchs zu erhalten, werden heutige Großhydraulikbagger für den Anlassvorgang mit einer Zweistufenschaltung betrieben, wobei der Elektromotor in der ersten Stufe mit einer reduzierten Spannung innerhalb einer definierten Zeit und anschließend nach Zuschaltung der zweiten Stufe mit der vollen Netzspannung betrieben wird. Large hydraulic excavators, such as those used in mining operations and equipped with electromotive drives, require a short-term amount of current equal to 4 to 6 times the rated motor current to start the respective electric motor from the utility company. In order to obtain this high energy demand without causing an operator-side network collapse, today's large hydraulic excavators are operated for the starting process with a two-stage circuit, wherein the electric motor in the first stage with a reduced voltage within a defined time and then after connection of the second stage with the full mains voltage is operated.
Nachteil dieser Schaltung ist, dass beim Umschaltvorgang von der ersten in die zweite Stufe kurzzeitige Stromspitzen entstehen, die die Spannung in einem bestehenden Netz zusammenbrechen lassen kann, Disadvantage of this circuit is that during the switching process from the first to the second stage short-term current peaks arise, which can collapse the voltage in an existing network,
Ziel des Erfindungsgegenstandes ist es, ein Verfahren zum Anlassen mindestens eines Elektromotors eines hydraulisch betriebenen Großhydraulikbaggers bereitzustellen, das die angegebenen Nachteile nicht mehr aufweist, so dass ein annähernd lastfreies Anlaufen des mindestens einen Elektromotors herbeigeführt werden kann. The aim of the subject invention is to provide a method for starting at least one electric motor of a hydraulically operated large hydraulic excavator, which no longer has the indicated disadvantages, so that an approximately load-free starting of the at least one electric motor can be brought about.
Dieses Ziel wird dadurch erreicht, dass der Volumenstrom mindestens einer mit dem Elektromotor in Wirkverbindung stehenden Hydraulikpumpe während sämtlicher Anlaufstufen des Elektromotors auf die Fördermenge V = 0 gestellt und die Fördermenge V der Hydraulikpumpe erst nach der letzten Anlaufstufe des Elektromotors durch Betätigung eines Stellgliedes auf einen Wert > 0 geregelt wird. This goal is achieved in that the volume flow of at least one hydraulic pump operatively connected to the electric motor is set to the flow rate V = 0 during all starting stages of the electric motor and the flow rate V of the hydraulic pump is controlled only after the last start-up stage of the electric motor by actuation of an actuator to a value> 0.
Vorteilhafte Weiterbildungen des erfindungsgemäßen Verfahrens sind den Unteransprüchen zu entnehmen. Advantageous developments of the method according to the invention can be found in the dependent claims.
Der jeweilige Asynchron-Elektromotor wird, einem weiteren Gedanken der Erfindung gemäß, unter Einsatz der an sich bekannten Korndorfer Schaltung in Betrieb genommen. The respective asynchronous electric motor is, according to another idea of the invention, put into operation using the known Korndorfer circuit.
Das erfindungsgemäße Verfahren soll vorteilhafterweise im Bereich eines elektrohydraulisch angetriebenen Großhydraulikbaggers mit einem Dienstgewicht > 100 t eingesetzt werden. The method according to the invention should advantageously be used in the area of an electrohydraulically driven large hydraulic excavator with a service weight of> 100 t.
Mit dem Erfindungsgegenstand ist der Vorteil verbunden, dass durch das dreistufige Anlaufen des mindestens einen Elektromotors in Kombination mit der Rücknahme des hydraulischen Fördervolumenstroms auf die Fördermenge V = 0 mindestens einer Hydraulikpumpe ein annähernd lastfreier Anlauf des jeweiligen Elektromotors gewährleistet werden kann. Die vorab angesprochenen Nachteile sind mit dem Einsatz des Erfindungsgegenstandes nicht mehr gegeben. The subject of the invention has the advantage that, by virtue of the three-stage starting of the at least one electric motor in combination with the withdrawal of the hydraulic delivery volume flow to the delivery rate V = 0 of at least one hydraulic pump, an approximately load-free start-up of the respective electric motor can be ensured. The above-mentioned disadvantages are no longer given with the use of the subject invention.
Von besonderem Vorteil ist, dass die Fördermenge der Hydraulikpumpe in jeder der drei Anlaufphasen des Elektromotors den Wert 0 hat. Dies gilt auch, wenn der Elektromotor bereits mit voller Drehzahl läuft. Erst durch Betätigung eines Stellgliedes, z.B. manueller Auslenkung eines Handhebels, wird über ein Vorsteuerventil die vorteilhafterweise als Axialkolbenpumpe ausgebildete Hydraulikpumpe mit Druck beaufschlagt und erst dann wird die Fördermenge auf einen Wert > 0 bis hin zur maximalen Fördermenge erhöht. It is particularly advantageous that the delivery rate of the hydraulic pump has the value 0 in each of the three starting phases of the electric motor. This also applies if the electric motor is already running at full speed. Only by actuating an actuator, e.g. Manual deflection of a hand lever, the advantageously designed as an axial piston pump hydraulic pump is pressurized via a pilot valve and only then is the flow rate increased to a value> 0 up to the maximum flow rate.
Der Erfindungsgegenstand ist anhand eines Ausführungsbeispiels in der Zeichnung dargestellt und wird wie folgt beschrieben. Es zeigen: Figuren 1 bis 5 Prinzipskizzen eines Schaltbildes zur Inbetriebnahme eines hydraulischen Antriebes mit Elektromotor. The subject invention is illustrated by means of an embodiment in the drawing and will be described as follows. Show it: Figures 1 to 5 are schematic diagrams of a circuit diagram for commissioning a hydraulic drive with electric motor.
Gleiche Bauteile sind der besseren Übersicht halber mit gleichen Bezugszeichen versehen. The same components are provided for the sake of clarity with the same reference numerals.
Figur 1 zeigt die Grundstellung (Außerbetriebstellung), in welcher die Spannung an einem geöffneten Schalter 1 über der Leitung 8 ansteht. Die Fördermenge V der Hydraulikpumpe 13 hat den Wert 0. Figure 1 shows the basic position (inoperative position), in which the voltage is present at an open switch 1 via the line 8. The delivery quantity V of the hydraulic pump 13 has the value 0.
Figur 2 zeigt die erste Schaltstufe des Anlassvorganges eines Elektromotors 6 eines nicht weiter dargestellten Hydraulikbaggers mit einem Dienstgewicht > 100 t. Die Schaltelemente 1 und 3 werden geschlossen. Durch das geschlossene Schaltelement 1 fließt der elektrische Strom über elektrische Leitungen 8 und 9 zu einem Transformator 2. Das Schaltelement 3 zum Sternpunkt 5 des Transformators 2 ist geschlossen. Dies hat zur Folge, dass am Abgriffpunkt 7 des Transformators 2 ein elektrischer Teilstrom über elektrische Leitungen 10 und 12 an den Elektromotor 6 abgegeben wird. Die Fördermenge V der in diesem Beispiel als Axialkolbenpumpe ausgebildeten Hydraulikpumpe 13 hat weiterhin den Wert 0. Figure 2 shows the first switching stage of the starting process of an electric motor 6 of a hydraulic excavator not shown with a service weight> 100 t. The switching elements 1 and 3 are closed. Due to the closed switching element 1, the electric current flows via electrical lines 8 and 9 to a transformer 2. The switching element 3 to the neutral point 5 of the transformer 2 is closed. This has the consequence that at the tapping point 7 of the transformer 2, an electrical partial flow is discharged via electrical lines 10 and 12 to the electric motor 6. The delivery rate V of the hydraulic pump 13 designed as an axial piston pump in this example also has the value 0.
Figur 3 zeigt die zweite Schaltstufe des Anlassvorgangs. In dieser zweiten Anlassstufe wird das Schaltelement 3 zum Sternpunkt 5 des Transformators 2 geöffnet. Der obere Teil des Transformators 2 wirkt nun als Drossel. Auch in dieser Schaltstufe verbleibt die Fördermenge V der Hydraulikpumpe 13 auf dem Wert 0. FIG. 3 shows the second switching stage of the starting process. In this second starting stage, the switching element 3 is opened to the star point 5 of the transformer 2. The upper part of the transformer 2 now acts as a throttle. Also in this switching stage, the flow rate V of the hydraulic pump 13 remains at the value 0.
Figur 4 zeigt die dritte Schaltstufe des Startvorganges des Elektromotors 6. Nach Ablauf einer vorgegebenen Zeit wird das Schaltelement 4 durch eine nicht näher beschriebene Steuereinheit 16 geschlossen. Der Nennstrom wird über die geschlossenen Schalter 1 und 4 direkt vom Elektromotor 6 aufgenommen. Der Elektromotor wird in dieser Schaltstellung bereits mit seiner Nennspannung beaufschlagt. Auch in dieser letzten Schaltstufe verbleibt die Fördermenge V der Hydraulikpumpe 13 auf dem Wert 0. Figur 5 zeigt nun die Hinzuschaltung der als Axialkolbenpumpe ausgebildeten Hydraulikpumpe 13. Der Handhebel 22 des Stellgliedes 21 wird ausgelenkt und schließt somit den Schalter 18. Durch Betätigung des Schalters 18 wird in der nicht weiter beschriebenen elektronischen Steuereinheit 16 ein Befehlsablauf ausgelöst, der über den Ausgang 7 der Steuereinheit 16 ein 15 elektronisch derart ansteuert, dass ein Hydraulikstrom, der von einer Hilfspumpe 14 gefördert wird, über das Proportionalventil 15 die als Verstellpumpe ausgebildete Hydraulikpumpe 13 beaufschlagt. Durch das Zusammenwirken des Stellgliedes 21 , bestehend aus dem Handhebel 22 und dem damit in Wirkverbindung stehenden Schalter 18, mit der Steuereinheit 16 sowie dem hydraulischen Kreis 14,15,19,20 wird erreicht, dass die Verstellpumpe 13 gegen die Fördermenge V = max regelt. Figure 4 shows the third switching stage of the starting process of the electric motor 6. After a predetermined time, the switching element 4 is closed by a control unit 16 not described in detail. The nominal current is absorbed directly by the electric motor 6 via the closed switches 1 and 4. The electric motor is already applied in this switching position with its rated voltage. Also in this last switching stage, the flow rate V of the hydraulic pump 13 remains at the value 0. Figure 5 now shows the addition of trained as axial piston pump hydraulic pump 13. The hand lever 22 of the actuator 21 is deflected and thus closes the switch 18. By operating the switch 18, a command sequence is triggered in the not further described electronic control unit 16, via the output 7 of the control unit 16 electronically controls a 15 such that a hydraulic flow, which is supported by an auxiliary pump 14, applied via the proportional valve 15 designed as a variable displacement hydraulic pump 13. By the interaction of the actuator 21, consisting of the hand lever 22 and the thus operatively connected switch 18, with the control unit 16 and the hydraulic circuit 14,15,19,20 is achieved that the variable displacement 13 controls against the flow rate V = max ,
Bezugszeichenliste LIST OF REFERENCE NUMBERS
1 Schaltelement 1 switching element
2 Transformator  2 transformer
3 Schaltelement  3 switching element
4 Schaltelement  4 switching element
5 Sternpunkt  5 star point
6 Elektromotor  6 electric motor
7 Abgriffpunkt  7 tapping point
8 elektrische Leitung  8 electrical line
9 elektrische Leitung  9 electrical line
10 elektrische Leitung  10 electrical line
12 elektrische Leitung  12 electrical line
13 Hydraulikpumpe (Axialkolbenpu 13 Hydraulic pump (axial piston pump
14 Hilfspumpe 14 auxiliary pump
15 Vorsteuerventil  15 pilot valve
16 elektronische Steuereinheit 16 electronic control unit
17 Ausgang 17 exit
18 Schalter  18 switches
19 hydraulische Leitung  19 hydraulic line
20 hydraulische Leitung  20 hydraulic line
21 Stellglied  21 actuator
22 Handhebel  22 hand lever

Claims

Patentansprüche . Verfahren zum Starten mindestens eines Asynchron-Elektromotors (6) eines Großhydraulikbaggers mit einem Dienstgewicht > 100 t mit elektrohydraulischem Antrieb, indem der jeweilige Elektromotor (6) durch Einsatz eines dreistufigen Motor-Anlaufvorganges aus einer Außerbetriebs- in eine Betriebssteliung geführt wird, dadurch gekennzeichnet, dass der Volumenstrom mindestens einer mit dem Elektromotor (6) in Wirkverbindung stehenden Hydraulikpumpe (13) während sämtlicher Anlaufstufen des Elektromotors (6) auf die Fördermenge V = 0 gestellt und die Fördermenge V der Hydraulikpumpe (13) erst nach der letzten Anlaufstufe des Elektromotors (6) durch Betätigung eines Stetigliedes (21) auf einen Wert > 0 geregelt wird. Claims. Method for starting at least one asynchronous electric motor (6) of a large hydraulic excavator with a service weight> 100 t with electrohydraulic drive, by moving the respective electric motor (6) from a non-operating to an operating position by using a three-stage motor starting process, characterized in that the volume flow of at least one hydraulic pump (13) in operative connection with the electric motor (6) is set to the flow rate V = 0 during all starting stages of the electric motor (6) and the flow rate V of the hydraulic pump (13) is not reached until after the last starting stage of the electric motor ( 6) is controlled by pressing a Stetigliedes (21) to a value> 0.
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass der jeweilige Elektromotor (6) unter Einsatz der Komdorfer Schaltung in Betrieb genommen wird. 2. The method according to claim 1, characterized in that the respective electric motor (6) is put into operation using the Komdorfer circuit.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass in der ersten Schaltstufe eine Steuereinheit (16) elektrische Schaltelemente (1 ,3) schließt, wobei die Fördermenge V der Hydraulikpumpe (13) auf dem Wert 0 verbleibt. 3. The method according to claim 1 or 2, characterized in that in the first switching stage, a control unit (16) closes electrical switching elements (1, 3), wherein the flow rate V of the hydraulic pump (13) remains at the value 0.
4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass in der zweiten Schaltstufe das Schaltelement (3) zum Sternpunkt (5) eines Transformators (2) geöffnet wird, wobei die Fördermenge V der Hydraulikpumpe (13) auf dem Wert 0 verbleibt, 4. The method according to any one of claims 1 to 3, characterized in that in the second switching stage, the switching element (3) to the neutral point (5) of a transformer (2) is opened, wherein the delivery rate V of the hydraulic pump (13) to the value 0 remains
5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass in der dritten Schaltstufe das Vorsteuerventil (5) geschlossen bleibt und die Fördermenge V der Hydraulikpumpe ( 3) auf dem Wert 0 verbleibt. 5. The method according to any one of claims 1 to 4, characterized in that in the third switching stage, the pilot valve (5) remains closed and the flow rate V of the hydraulic pump (3) remains at the value 0.
Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass nach der letzten Anlaufstufe des Elektromotors ein als Handhebel (22) ausgebildetes Stellglied (21) manuell ausgelenkt wird und in Abhängigkeit des Auslenkungsgrades des Handhebels (22) die Fördermenge V zwischen einem Wert > 0 und max. Fördermenge V max. geregelt wird. Method according to one of claims 1 to 4, characterized in that after the last start-up stage of the electric motor designed as a hand lever (22) actuator (21) is deflected manually and depending on the degree of deflection of the hand lever (22) the flow rate V between a value> 0 and max. Flow rate V max. is regulated.
Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass als Hydraulikpumpe (13) eine Axialkotbenpumpe eingesetzt wird. Method according to one of claims 1 to 6, characterized in that a Axialkotbenpumpe is used as the hydraulic pump (13).
8. Verwendung der Korndorfer Schaltung zum Starten mindestens eines im Bereich eines Großhydraulikbaggers mit einem Dienstgewicht > 100 t vorgesehenen Asynchron-Elektromotors (6). 8. Use of Korndorfer circuit for starting at least one provided in the range of a large hydraulic excavator with a service weight> 100 t asynchronous electric motor (6).
PCT/DE2011/001531 2010-08-04 2011-07-29 Method for starting an electric motor in a hydraulically operated working machine WO2012025086A2 (en)

Priority Applications (4)

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AU2011295484A AU2011295484A1 (en) 2010-08-04 2011-07-29 Method for starting an electric motor in a hydraulically operated working machine
US13/813,555 US20130171007A1 (en) 2010-08-04 2011-07-29 Method for starting an electric motor in a hydraulically operated working machine
EP11791194.1A EP2601411A2 (en) 2010-08-04 2011-07-29 Method for starting an electric motor in a hydraulically operated working machine
CN201180048168.4A CN103154513B (en) 2010-08-04 2011-07-29 For starting the method for the motor in the work mechanism of hydraulic running

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DE102010033346.8 2010-08-04
DE102010033346A DE102010033346B3 (en) 2010-08-04 2010-08-04 Method for starting an electric motor in a hydraulically operated machine

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DE102022120368A1 (en) 2022-08-11 2024-02-22 Wacker Neuson Linz Gmbh Hydraulic work vehicle with a vehicle frame and a work tool

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DE102010033346B3 (en) 2012-02-02
EP2601411A2 (en) 2013-06-12
US20130171007A1 (en) 2013-07-04
AU2011295484A1 (en) 2013-02-28
CN103154513B (en) 2015-10-14
CN103154513A (en) 2013-06-12
WO2012025086A3 (en) 2012-04-19

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