EP4260426A1 - Energy supply device and construction machine - Google Patents

Energy supply device and construction machine

Info

Publication number
EP4260426A1
EP4260426A1 EP21830648.8A EP21830648A EP4260426A1 EP 4260426 A1 EP4260426 A1 EP 4260426A1 EP 21830648 A EP21830648 A EP 21830648A EP 4260426 A1 EP4260426 A1 EP 4260426A1
Authority
EP
European Patent Office
Prior art keywords
supply device
energy supply
mains connection
electrical
voltage
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.)
Pending
Application number
EP21830648.8A
Other languages
German (de)
French (fr)
Inventor
Dr. Rolf WIRFS
Georg Dielmann
Johannes Demling
Sebastian Kerner
Christian Ziemens
Werner Tausch
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.)
Refu Drive GmbH
Putzmeister Engineering GmbH
Original Assignee
Refu Drive GmbH
Putzmeister Engineering 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 Refu Drive GmbH, Putzmeister Engineering GmbH filed Critical Refu Drive GmbH
Publication of EP4260426A1 publication Critical patent/EP4260426A1/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/007—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
    • H02M7/08—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode arranged for operation in parallel
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/01—Resonant DC/DC converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/145—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
    • H02M7/15—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using discharge tubes only
    • H02M7/153—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using discharge tubes only arranged for operation in parallel
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/145—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
    • H02M7/155—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
    • H02M7/17—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only arranged for operation in parallel
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M7/23—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only arranged for operation in parallel

Definitions

  • the invention relates to an energy supply device and a construction machine.
  • the object of the invention is to provide an energy supply device and a construction machine that can be used as flexibly as possible.
  • the energy supply device is used to supply electrical consumers with electrical energy.
  • the energy supply device has a conventional intermediate circuit, which carries a buffered intermediate circuit DC voltage, for example.
  • the energy supply device also has a first mains connection to which a first, in particular three-phase, AC voltage mains can be connected as intended.
  • the energy supply device also has a first rectifier, which is designed to rectify an AC voltage that corresponds to an AC voltage present at the first mains connection or is based on this, and to feed the rectified voltage into the intermediate circuit.
  • the first rectifier can be a single-phase or a multi-phase rectifier.
  • the energy supply device also has a second mains connection to which a second, in particular three-phase, AC voltage mains can be connected as intended.
  • the energy supply device also has a second rectifier, which is designed to rectify an AC voltage that corresponds to or is based on an AC voltage that is present at the second mains connection.
  • the second rectifier can be a single-phase or a multi-phase rectifier.
  • the power supply device also has a controllable unidirectional or bidirectional DC/DC converter, which is acted upon on a first side with the voltage rectified by means of the second rectifier and on a second side with the intermediate circuit is connected.
  • the DC/DC converter is designed to transfer electrical energy/power from the second rectifier in the direction of the intermediate circuit when required.
  • the energy supply device also has a first power converter which is fed from the intermediate circuit and which is designed to supply electrical energy to a first electrical load.
  • the power converter can be an inverter, for example, which generates one or more sinusoidal AC voltages from the intermediate circuit DC voltage for supplying the first electrical supplier.
  • the power converter can also be in the form of a DC/DC converter, which converts a level of the intermediate circuit voltage into a DC voltage with a level that is suitable for the first electrical load.
  • the energy supply device also has a conventional power measuring device, which is designed to measure electrical power consumed at the first mains connection.
  • the energy supply device also has a control device, for example in the form of a microprocessor control device, which is in data connection with the power measuring device and which is designed to control the DC/DC converter as a function of the electrical power consumed at the first mains connection, so that the DC/DC Depending on requirements, the DC converter transmits more or less electrical energy/power from the second mains connection in the direction of the intermediate circuit.
  • a control device for example in the form of a microprocessor control device, which is in data connection with the power measuring device and which is designed to control the DC/DC converter as a function of the electrical power consumed at the first mains connection, so that the DC/DC Depending on requirements, the DC converter transmits more or less electrical energy/power from the second mains connection in the direction of the intermediate circuit.
  • control device controls the DC/DC converter in such a way that electrical power is transmitted from the second grid connection in the direction of the intermediate circuit when the electrical power consumed at the first grid connection exceeds a threshold value. In this way, electrical power can be called up dynamically from the second connection when required, so that the total electrical power available is optimized.
  • control device controls the DC/DC converter in such a way that a maximum electrical power that can be output by the energy supply device corresponds to a sum of the maximum electrical power available at the first mains connection and the maximum electrical power available at the second mains connection .
  • the energy supply device also has a second power converter, for example in the form of a single-phase or multi-phase inverter or a DC/DC converter, which is fed from the intermediate circuit and is designed to supply a second electrical consumer with electrical energy.
  • the energy supply device has a galvanically isolating transformer (isolating transformer), a first winding or primary winding of the galvanically isolating transformer being connected to the second mains connection and a second winding or secondary winding of the galvanically isolating transformer being connected to the second rectifier.
  • a galvanically isolating transformer isolated transformer
  • first winding or primary winding of the galvanically isolating transformer being connected to the second mains connection
  • a second winding or secondary winding of the galvanically isolating transformer being connected to the second rectifier.
  • the first mains connection is a mains connection with a current carrying capacity of 32 A, as is typically used on construction sites, for example.
  • the second mains connection is a mains connection with a current carrying capacity of 16 A, as is typically used on construction sites, for example.
  • the construction machine according to the invention has an energy supply device as described above and an electric drive, which forms the first electrical load of the energy supply device and which is consequently supplied with electrical energy by means of the first converter of the energy supply device.
  • the construction machine is a thick material discharge device for discharging thick material, in particular mortar, the thick material discharge device having an electrical mixer drive for mixing the thick material, which forms the above-mentioned electrical drive and which is consequently supplied with electrical energy by means of the first power converter of the energy supply device.
  • the thick matter discharge device also has an electric compressor for generating compressed air, which forms the second electrical consumer of the energy supply device and which is consequently supplied with electrical energy by means of the second converter of the energy supply device.
  • FIG. 1 shows a schematic block diagram of a construction machine with an energy supply device according to the invention for supplying electrical consumers of the construction machine with electrical energy.
  • FIG. 1 shows a schematic block diagram of a construction machine in the form of a thick matter discharge device 1000 for discharging thick matter with an energy supply device 100 according to the invention for supplying electrical consumers in the form of a compressor 1 and a mixer drive 2 of the thick matter discharge device 1000 with electrical energy/power.
  • the energy supply device 100 has an intermediate circuit 3, on which an intermediate circuit DC voltage of, for example, DC 550 V is present with a mains voltage connection of 3AC 400 V.
  • the energy supply device 100 also has a first mains connection 4 to which a first AC voltage mains 5 can be connected, for example a building site mains with a current carrying capacity of 32 A.
  • the energy supply device 100 also has an optional conventional mains filter 16 and an optional downstream smoothing choke 17, which is followed by a first rectifier 6.
  • the first rectifier 6 is designed to rectify an AC voltage present at the first mains connection 4 and to feed the rectified voltage into the intermediate circuit 3 .
  • the energy supply device 100 also has a second mains connection 7 to which a second AC voltage mains 8 can be connected as intended, for example a construction site mains with a current carrying capacity of 16 A.
  • the energy supply device 100 also has an optional conventional mains filter 18 and a galvanically isolating transformer 15, with a first winding or primary winding 15a of the galvanically isolating transformer 15 being connected to the second mains connection 7 via the mains filter 18 and a second winding or secondary winding 15b of the galvanically isolating transformer 15 is connected to a second rectifier 9 .
  • the second rectifier 9 is designed to rectify an AC voltage that is present at the second winding 15b of the galvanically isolating transformer 15 and that is based on an AC voltage that is present at the second mains connection 7 .
  • the energy supply device 100 also has a controllable DC/DC converter 10, to which the voltage rectified by the second rectifier 9 is applied on a first side and which is connected to the intermediate circuit 3 on a second side with an optional smoothing inductor 19 interposed.
  • the energy supply device 100 also has a first power converter in the form of an inverter 11 which is fed from the intermediate circuit 3 and which is designed to supply the mixer drive 2 with electrical energy.
  • the energy supply device 100 also has a second power converter in the form of an inverter 14, which is fed from the intermediate circuit 3 and is designed to supply the compressor 1 with electrical energy.
  • the energy supply device 100 also has a power measuring device 12 which is designed to measure an electrical power consumed at the first mains connection 4 .
  • the energy supply device 100 also has a control device 13 which is in a data connection with the power measuring device 12 and which is designed to control the DC/DC converter 10 depending on the electrical power consumed at the first mains connection 4 .
  • the control device 13 controls the DC/DC converter 10 in such a way that electrical power is transmitted from the second grid connection 7 in the direction of the intermediate circuit 3 . This makes it possible for a maximum electrical power that can be output by the energy supply device 100 to correspond to a sum of the maximum electrical power available at the first mains connection 4 and the maximum electrical power available at the second mains connection 7 .
  • Fig. 1 now shows an example of a possible circuit with a 32 A connection 4 and a 16 A connection 7.
  • the DC/DC converter or controller 10 "pushes" electrical power into the intermediate circuit 3 in a current-controlled manner.
  • the central controller 13 uses the measuring device 12 at the 32 A connection 4 to check when additional power from the 16 A connection 7 is required. If all consumers 1, 2 are connected to the 32 A path, the construction machine 1000 can optionally also be operated only at the 32 A connection 4.
  • multiple energy paths or multiple connections 4 and 7 are combined in such a way that the usable power increases to the sum of the connected powers.
  • electrical energy/power is contributed to the main connection 4 by further connections as required, without there being a fixed assignment between consumers 1 , 2 and connections 4 and 7 .
  • the power of the further connection 7 is fed to the intermediate circuit 3 and the power yield is maximized overall.
  • second mains connections 7 can also be present.
  • the other connection paths then correspond to the path at the second mains connection 7 with the components: optional mains filter 18, galvanically isolating transformer 15, rectifier 9 and DC/DC converter 10, which (with) feeds the intermediate circuit 3.
  • a maximum power yield of the electrical connection power for example of a construction machine with two (or more) mains connections, is possible. Because of the galvanically isolating transformer 15, the connections 4 and 7 do not affect one another.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Direct Current Feeding And Distribution (AREA)
  • Rectifiers (AREA)
  • Dc-Dc Converters (AREA)

Abstract

The invention relates to an energy supply device (100) for supplying electric loads (1, 2) with electric energy, comprising: - a DC link (3); - a first mains connection (4) to which a first AC voltage grid (5) can be connected as intended; - a first rectifier (6) which is designed to rectify an AC voltage corresponding to an AC voltage across the first mains connection (4) or based thereon and to feed the rectified voltage into the DC link (3); - a second mains connection (7) to which a second AC voltage grid (8) can be connected as intended; - a second rectifier (9) which is designed to rectify an AC voltage corresponding to an AC voltage across the second mains connection (7) or based thereon; - a controllable DC-to-DC converter (10) to a first side of which a voltage rectified by means of the second rectifier (9) is applied, and a second side of which is connected to the DC link (3); - a first current converter (11) which is fed from the DC link (3) and is designed to supply a first electric load (2) with electric energy; - a power measuring apparatus (12) which is designed to measure electric power consumed at the first mains connection (4); and - a control apparatus (13) which has a data link to the power measuring apparatus (12) and which is designed to control the DC-DC converter (10) according to the electric power consumed at the first mains connection (4).

Description

Energieversorgungsvorrichtung und Baumaschine Power supply device and construction machine
Die Erfindung betrifft eine Energieversorgungsvorrichtung und eine Baumaschine. The invention relates to an energy supply device and a construction machine.
Der Erfindung liegt die Aufgabe zugrunde, eine Energieversorgungsvorrichtung und eine Baumaschine zur Verfügung zu stellen, die möglichst flexibel einsetzbar sind. The object of the invention is to provide an energy supply device and a construction machine that can be used as flexibly as possible.
Die Energieversorgungsvorrichtung dient zur Versorgung von elektrischen Verbrauchern mit elektrischer Energie. The energy supply device is used to supply electrical consumers with electrical energy.
Die Energieversorgungsvorrichtung weist einen herkömmlichen Zwischenkreis auf, der beispielsweise eine gepufferte Zwischenkreisgleichspannung führt. The energy supply device has a conventional intermediate circuit, which carries a buffered intermediate circuit DC voltage, for example.
Die Energieversorgungsvorrichtung weist weiter einen ersten Netzanschluss auf, an den bestimmungsgemäß ein erstes, insbesondere dreiphasiges, Wechselspannungsnetz anschließbar ist. The energy supply device also has a first mains connection to which a first, in particular three-phase, AC voltage mains can be connected as intended.
Die Energieversorgungsvorrichtung weist weiter einen ersten Gleichrichter auf, der dazu ausgebildet ist, eine Wechselspannung, die einer an dem ersten Netzanschluss anstehenden Wechselspannung entspricht oder auf dieser basiert, gleichzurichten und die gleichgerichtete Spannung in den Zwischenkreis einzuspeisen. Der erste Gleichrichter kann ein einphasiger oder ein mehrphasiger Gleichrichter sein. The energy supply device also has a first rectifier, which is designed to rectify an AC voltage that corresponds to an AC voltage present at the first mains connection or is based on this, and to feed the rectified voltage into the intermediate circuit. The first rectifier can be a single-phase or a multi-phase rectifier.
Die Energieversorgungsvorrichtung weist weiter einen zweiten Netzanschluss auf, an den bestimmungsgemäß ein zweites, insbesondere dreiphasiges, Wechselspannungsnetz anschließbar ist. The energy supply device also has a second mains connection to which a second, in particular three-phase, AC voltage mains can be connected as intended.
Die Energieversorgungsvorrichtung weist weiter einen zweiten Gleichrichter auf, der dazu ausgebildet ist, eine Wechselspannung, die einer an dem zweiten Netzanschluss anstehenden Wechselspannung entspricht oder auf dieser basiert, gleichzurichten. Der zweite Gleichrichter kann ein einphasiger oder ein mehrphasiger Gleichrichter sein. The energy supply device also has a second rectifier, which is designed to rectify an AC voltage that corresponds to or is based on an AC voltage that is present at the second mains connection. The second rectifier can be a single-phase or a multi-phase rectifier.
Die Energieversorgungsvorrichtung weist weiter einen steuerbaren unidirektionalen oder bidirektionalen DC/DC-Wandler auf, der an einer ersten Seite mit der mittels des zweiten Gleichrichters gleichgerichteten Spannung beaufschlagt ist und der an einer zweiten Seite mit dem Zwischenkreis verbunden ist. Der DC/DC-Wandler ist dazu ausgebildet, bei Bedarf elektrische Energie/Leistung vom zweiten Gleichrichter in Richtung des Zwischenkreises zu übertragen. The power supply device also has a controllable unidirectional or bidirectional DC/DC converter, which is acted upon on a first side with the voltage rectified by means of the second rectifier and on a second side with the intermediate circuit is connected. The DC/DC converter is designed to transfer electrical energy/power from the second rectifier in the direction of the intermediate circuit when required.
Die Energieversorgungsvorrichtung weist weiter einen ersten Stromrichter auf, der aus dem Zwischenkreis gespeist ist und der zur Versorgung eines ersten elektrischen Verbrauchers mit elektrischer Energie ausgebildet ist. Der Stromrichter kann beispielsweise ein Wechselrichter sein, der aus der Zwischenkreisgleichspannung eine oder mehrere sinusförmige Wechselspannungen zur Versorgung des ersten elektrischen Versorgers erzeugt. Der Stromrichter kann alternativ oder zusätzlich auch als DC/DC-Wandler ausgebildet sein, der einen Pegel der Zwischenkreisspannung in eine Gleichspannung mit einem Pegel wandelt, der für den ersten elektrischen Verbraucher geeignet ist. The energy supply device also has a first power converter which is fed from the intermediate circuit and which is designed to supply electrical energy to a first electrical load. The power converter can be an inverter, for example, which generates one or more sinusoidal AC voltages from the intermediate circuit DC voltage for supplying the first electrical supplier. Alternatively or additionally, the power converter can also be in the form of a DC/DC converter, which converts a level of the intermediate circuit voltage into a DC voltage with a level that is suitable for the first electrical load.
Die Energieversorgungsvorrichtung weist weiter eine herkömmliche Leistungsmesseinrichtung auf, die dazu ausgebildet ist, eine an dem ersten Netzanschluss aufgenommene elektrische Leistung zu messen. The energy supply device also has a conventional power measuring device, which is designed to measure electrical power consumed at the first mains connection.
Die Energieversorgungsvorrichtung weist weiter eine Steuereinrichtung auf, beispielsweise in Form einer Mikroprozessorsteuereinrichtung, die mit der Leistungsmesseinrichtung in Datenverbindung steht und die dazu ausgebildet ist, den DC/DC-Wandler in Abhängigkeit von der an dem ersten Netzanschluss aufgenommenen elektrischen Leistung anzusteuern, damit der DC/DC-Wandler bedarfsabhängig mehr oder weniger elektrische Energie/Leistung vom zweiten Netzanschluss in Richtung des Zwischenkreises überträgt. The energy supply device also has a control device, for example in the form of a microprocessor control device, which is in data connection with the power measuring device and which is designed to control the DC/DC converter as a function of the electrical power consumed at the first mains connection, so that the DC/DC Depending on requirements, the DC converter transmits more or less electrical energy/power from the second mains connection in the direction of the intermediate circuit.
In einer Ausführungsform steuert die Steuereinrichtung den DC/DC-Wandler derart an, dass elektrische Leistung von dem zweiten Netzanschluss in Richtung des Zwischenkreises übertragen wird, wenn die an dem ersten Netzanschluss aufgenommene elektrische Leistung einen Schwellenwert überschreitet. Auf diese Weise lässt sich dynamisch bei Bedarf elektrische Leistung von dem zweiten Anschluss abrufen, so dass die verfügbare elektrische Gesamtleistung optimiert wird. In one embodiment, the control device controls the DC/DC converter in such a way that electrical power is transmitted from the second grid connection in the direction of the intermediate circuit when the electrical power consumed at the first grid connection exceeds a threshold value. In this way, electrical power can be called up dynamically from the second connection when required, so that the total electrical power available is optimized.
In einer Ausführungsform steuert die Steuereinrichtung den DC/DC-Wandler derart an, dass eine maximale von der Energieversorgungsvorrichtung abgebbare elektrische Leistung einer Summe der an dem ersten Netzanschluss maximal zur Verfügung stehenden elektrischen Leistung und der an dem zweiten Netzanschluss maximal zur Verfügung stehenden elektrischen Leistung entspricht. ln einer Ausführungsform weist die Energieversorgungsvorrichtung weiter einen zweiten Stromrichter auf, beispielsweise in Form eines ein- oder mehrphasigen Wechselrichters oder eines DC/DC-Wandlers, der aus dem Zwischenkreis gespeist ist und der zur Versorgung eines zweiten elektrischen Verbrauchers mit elektrischer Energie ausgebildet ist. In one embodiment, the control device controls the DC/DC converter in such a way that a maximum electrical power that can be output by the energy supply device corresponds to a sum of the maximum electrical power available at the first mains connection and the maximum electrical power available at the second mains connection . In one embodiment, the energy supply device also has a second power converter, for example in the form of a single-phase or multi-phase inverter or a DC/DC converter, which is fed from the intermediate circuit and is designed to supply a second electrical consumer with electrical energy.
In einer Ausführungsform weist die Energieversorgungsvorrichtung einen galvanisch trennenden Transformator (Trenntransformator) auf, wobei eine erste Wicklung bzw. Primärwicklung des galvanisch trennenden Transformators mit dem zweiten Netzanschluss verbunden ist und eine zweite Wicklung bzw. Sekundärwicklung des galvanisch trennenden Transformators mit dem zweiten Gleichrichter verbunden ist. In one embodiment, the energy supply device has a galvanically isolating transformer (isolating transformer), a first winding or primary winding of the galvanically isolating transformer being connected to the second mains connection and a second winding or secondary winding of the galvanically isolating transformer being connected to the second rectifier.
In einer Ausführungsform ist der erste Netzanschluss ein Netzanschluss mit 32 A Strombelastbarkeit, wie er beispielsweise auf Baustellen typisch Verwendung findet. In one embodiment, the first mains connection is a mains connection with a current carrying capacity of 32 A, as is typically used on construction sites, for example.
In einer Ausführungsform ist der zweite Netzanschluss ein Netzanschluss mit 16 A Strombelastbarkeit, wie er beispielsweise auf Baustellen typisch Verwendung findet. In one embodiment, the second mains connection is a mains connection with a current carrying capacity of 16 A, as is typically used on construction sites, for example.
Die erfindungsgemäße Baumaschine weist eine oben beschriebene Energieversorgungsvorrichtung und einen elektrischen Antrieb auf, der den ersten elektrischen Verbraucher der Energieversorgungseinrichtung bildet und der folglich mittels des ersten Stromrichters der Energieversorgungsvorrichtung mit elektrischer Energie versorgt ist. The construction machine according to the invention has an energy supply device as described above and an electric drive, which forms the first electrical load of the energy supply device and which is consequently supplied with electrical energy by means of the first converter of the energy supply device.
In einer Ausführungsform ist die Baumaschine eine Dickstoffaustragevorrichtung zum Austragen von Dickstoff, insbesondere Mörtel, wobei die Dickstoffaustragevorrichtung einen elektrischen Mischerantrieb zum Mischen des Dickstoffes aufweist, der den oben genannten elektrischen Antrieb bildet und der folglich mittels des ersten Stromrichters der Energieversorgungsvorrichtung mit elektrischer Energie versorgt ist. In one embodiment, the construction machine is a thick material discharge device for discharging thick material, in particular mortar, the thick material discharge device having an electrical mixer drive for mixing the thick material, which forms the above-mentioned electrical drive and which is consequently supplied with electrical energy by means of the first power converter of the energy supply device.
In einer Ausführungsform weist die Dickstoffaustragevorrichtung weiter einen elektrischen Kompressor zum Erzeugen von Druckluft auf, der den zweiten elektrischen Verbraucher der Energieversorgungseinrichtung bildet und der folglich mittels des zweiten Stromrichters der Energieversorgungsvorrichtung mit elektrischer Energie versorgt ist. In one embodiment, the thick matter discharge device also has an electric compressor for generating compressed air, which forms the second electrical consumer of the energy supply device and which is consequently supplied with electrical energy by means of the second converter of the energy supply device.
Die Erfindung wird nachfolgend detailliert unter Bezugnahme auf die Zeichnung beschrieben.The invention is described in detail below with reference to the drawing.
Hierbei zeigt: Fig. 1 schematisch ein Blockdiagramm einer Baumaschine mit einer erfindungsgemäßen Energieversorgungsvorrichtung zur Versorgung von elektrischen Verbrauchern der Baumaschine mit elektrischer Energie. This shows: 1 shows a schematic block diagram of a construction machine with an energy supply device according to the invention for supplying electrical consumers of the construction machine with electrical energy.
Fig. 1 zeigt schematisch ein Blockdiagramm einer Baumaschine in Form einer Dickstoffaustragevorrichtung 1000 zum Austragen von Dickstoff mit einer erfindungsgemäßen Energieversorgungsvorrichtung 100 zur Versorgung von elektrischen Verbrauchern in Form eines Kompressors 1 und eines Mischerantrieb 2 der Dickstoffaustragevorrichtung 1000 mit elektrischer Ener- gie/Leistung. 1 shows a schematic block diagram of a construction machine in the form of a thick matter discharge device 1000 for discharging thick matter with an energy supply device 100 according to the invention for supplying electrical consumers in the form of a compressor 1 and a mixer drive 2 of the thick matter discharge device 1000 with electrical energy/power.
Die Energieversorgungsvorrichtung 100 weist einen Zwischenkreis 3 auf, auf dem eine Zwischenkreisgleichspannung von beispielsweise DC 550 V bei einem Netzspannungsanschluss von 3AC 400 V anliegt. The energy supply device 100 has an intermediate circuit 3, on which an intermediate circuit DC voltage of, for example, DC 550 V is present with a mains voltage connection of 3AC 400 V.
Die Energieversorgungsvorrichtung 100 weist weiter einen ersten Netzanschluss 4 auf, an den bestimmungsgemäß ein erstes Wechselspannungsnetz 5 anschließbar ist, beispielsweise ein Baustromnetz mit 32 A Strombelastbarkeit. The energy supply device 100 also has a first mains connection 4 to which a first AC voltage mains 5 can be connected, for example a building site mains with a current carrying capacity of 32 A.
Die Energieversorgungsvorrichtung 100 weist weiter ein optionales herkömmliches Netzfilter 16 und eine optionale nachgeschaltete Glättungsdrossel 17 auf, der ein erster Gleichrichter 6 nachgeschaltet ist. Der erste Gleichrichter 6 ist dazu ausgebildet, eine an dem ersten Netzanschluss 4 anstehende Wechselspannung gleichzurichten und die gleichgerichtete Spannung in den Zwischenkreis 3 einzuspeisen. The energy supply device 100 also has an optional conventional mains filter 16 and an optional downstream smoothing choke 17, which is followed by a first rectifier 6. The first rectifier 6 is designed to rectify an AC voltage present at the first mains connection 4 and to feed the rectified voltage into the intermediate circuit 3 .
Die Energieversorgungsvorrichtung 100 weist weiter einen zweiten Netzanschluss 7 auf, an den bestimmungsgemäß ein zweites Wechselspannungsnetz 8 anschließbar ist, beispielsweise ein Baustromnetz mit 16 A Strombelastbarkeit. The energy supply device 100 also has a second mains connection 7 to which a second AC voltage mains 8 can be connected as intended, for example a construction site mains with a current carrying capacity of 16 A.
Die Energieversorgungsvorrichtung 100 weist weiter ein optionales herkömmliches Netzfilter 18 und einen galvanisch trennenden Transformator 15 auf, wobei eine erste Wicklung bzw. Primärwicklung 15a des galvanisch trennenden Transformators 15 mit dem zweiten Netzanschluss 7 über das Netzfilter 18 verbunden ist und eine zweite Wicklung bzw. Sekundärwicklung 15b des galvanisch trennenden Transformators 15 mit einem zweiten Gleichrichter 9 verbunden ist. Der zweite Gleichrichter 9 ist dazu ausgebildet, eine an der zweiten Wicklung 15b des galvanisch trennenden Transformators 15 anstehende Wechselspannung, die auf einer an dem zweiten Netzanschluss 7 anstehenden Wechselspannung basiert, gleichzurichten. Die Energieversorgungsvorrichtung 100 weist weiter einen steuerbaren DC/DC- Wandler 10 auf, der an einer ersten Seite mit der mittels des zweiten Gleichrichters 9 gleichgerichteten Spannung beaufschlagt ist und der an einer zweiten Seite unter Zwischenschaltung einer optionalen Glättungsdrossel 19 mit dem Zwischenkreis 3 verbunden ist. The energy supply device 100 also has an optional conventional mains filter 18 and a galvanically isolating transformer 15, with a first winding or primary winding 15a of the galvanically isolating transformer 15 being connected to the second mains connection 7 via the mains filter 18 and a second winding or secondary winding 15b of the galvanically isolating transformer 15 is connected to a second rectifier 9 . The second rectifier 9 is designed to rectify an AC voltage that is present at the second winding 15b of the galvanically isolating transformer 15 and that is based on an AC voltage that is present at the second mains connection 7 . The energy supply device 100 also has a controllable DC/DC converter 10, to which the voltage rectified by the second rectifier 9 is applied on a first side and which is connected to the intermediate circuit 3 on a second side with an optional smoothing inductor 19 interposed.
Die Energieversorgungsvorrichtung 100 weist weiter einen ersten Stromrichter in Form eines Wechselrichters 11 auf, der aus dem Zwischenkreis 3 gespeist ist und der zur Versorgung des Mischerantriebs 2 mit elektrischer Energie ausgebildet ist. The energy supply device 100 also has a first power converter in the form of an inverter 11 which is fed from the intermediate circuit 3 and which is designed to supply the mixer drive 2 with electrical energy.
Die Energieversorgungsvorrichtung 100 weist weiter einen zweiten Stromrichter in Form eines Wechselrichters 14 auf, der aus dem Zwischenkreis 3 gespeist ist und zur Versorgung des Kompressors 1 mit elektrischer Energie ausgebildet ist. The energy supply device 100 also has a second power converter in the form of an inverter 14, which is fed from the intermediate circuit 3 and is designed to supply the compressor 1 with electrical energy.
Die Energieversorgungsvorrichtung 100 weist weiter eine Leistungsmesseinrichtung 12 auf, die dazu ausgebildet ist, eine an dem ersten Netzanschluss 4 aufgenommene elektrische Leistung zu messen. The energy supply device 100 also has a power measuring device 12 which is designed to measure an electrical power consumed at the first mains connection 4 .
Die Energieversorgungsvorrichtung 100 weist weiter eine Steuereinrichtung 13 auf, die mit der Leistungsmesseinrichtung 12 in Datenverbindung steht und die dazu ausgebildet ist, den DC/DC- Wandler 10 in Abhängigkeit von der an dem ersten Netzanschluss 4 aufgenommenen elektrischen Leistung anzusteuern. Für den Fall, dass die an dem ersten Netzanschluss 4 aufgenommene elektrische Leistung einen Schwellenwert überschreitet, steuert die Steuereinrichtung 13 den DC/DC-Wandler 10 derart an, dass elektrische Leistung von dem zweiten Netzanschluss 7 in Richtung des Zwischenkreises 3 übertragen wird. Auf diese Weise wird es ermöglicht, dass eine maximale von der Energieversorgungsvorrichtung 100 abgebbare elektrische Leistung einer Summe der an dem ersten Netzanschluss 4 maximal zur Verfügung stehenden elektrischen Leistung und der an dem zweiten Netzanschluss 7 maximal zur Verfügung stehenden elektrischen Leistung entspricht. The energy supply device 100 also has a control device 13 which is in a data connection with the power measuring device 12 and which is designed to control the DC/DC converter 10 depending on the electrical power consumed at the first mains connection 4 . In the event that the electrical power consumed at the first grid connection 4 exceeds a threshold value, the control device 13 controls the DC/DC converter 10 in such a way that electrical power is transmitted from the second grid connection 7 in the direction of the intermediate circuit 3 . This makes it possible for a maximum electrical power that can be output by the energy supply device 100 to correspond to a sum of the maximum electrical power available at the first mains connection 4 and the maximum electrical power available at the second mains connection 7 .
Verfügbare Netzanschlussdosen zum elektrischen Versorgen von Baumaschinen führen häufig zu Problemen hinsichtlich der verfügbaren elektrischen Anschlussleistung. Um beispielsweise eine elektrische Leistung von 30 kW zur Verfügung zu stellen, ist ein 63 A Anschluss notwendig. Da dieser Anschluss nicht immer verfügbar ist und übliche Baustromverteiler überwiegend auch nur mit 63 A abgesichert sind, verbleiben für elektrische Antriebe von Baumaschinen üblicherweise nur 32 A und 16 A Anschlüsse. Die maximale Leistung des elektrischen Verbrauchers wird derzeit begrenzt von der maximalen Anschlussleistung eines Anschlusses. Fig. 1 zeigt nun ein Beispiel einer möglichen Schaltung mit einem 32 A Anschluss 4 und einem 16 A Anschluss 7. Available mains connection sockets for the electrical supply of construction machines often lead to problems with regard to the available electrical connection power. For example, to provide an electrical output of 30 kW, a 63 A connection is required. Since this connection is not always available and common site power distributors are mostly only fused with 63 A, only 32 A and 16 A connections usually remain for electrical drives of construction machines. The maximum power of the electrical consumer is currently limited by the maximum connection power of a connection. Fig. 1 now shows an example of a possible circuit with a 32 A connection 4 and a 16 A connection 7.
Am 16 A Anschluss 7 erfolgt eine Potentialtrennung mit Spannungsanhebung. Der DC/DC- Wandler oder -Steller 10 "schiebt" elektrische Leistung stromgeregelt in den Zwischenkreis 3. Der Potenzialbezug stellt sich über die Kopplung im Zwischenkreis 3 ein. Über die Messeinrichtung 12 am 32 A Anschluss 4 prüft die zentrale Steuerung 13, wann zusätzliche Leistung vom 16 A Anschluss 7 erforderlich ist. Werden alle Verbraucher 1, 2 am 32 A Pfad angeschlossen, so kann die Baumaschine 1000 wahlweise auch nur am 32 A Anschluss 4 betrieben werden. At the 16 A connection 7 there is a potential separation with a voltage increase. The DC/DC converter or controller 10 "pushes" electrical power into the intermediate circuit 3 in a current-controlled manner. The central controller 13 uses the measuring device 12 at the 32 A connection 4 to check when additional power from the 16 A connection 7 is required. If all consumers 1, 2 are connected to the 32 A path, the construction machine 1000 can optionally also be operated only at the 32 A connection 4.
Erfindungsgemäß werden mehrere Energiepfade bzw. mehrere Anschlüsse 4 und 7 derart kombiniert, dass die nutzbare Leistung sich auf die Summe der Anschlussleistungen erhöht. Mit anderen Worten wird elektrische Energie/Leistung von weiteren Anschlüssen nach Bedarf dem Haupt-Anschluss 4 beigesteuert, ohne dass eine feste Zuordnung zwischen Verbrauchern 1 , 2 und Anschlüssen 4 und 7 vorhanden ist. Durch die Messung der Leistungsaufnahme am Haupt- Anschluss 4 wird die Leistung des weiteren Anschlusses 7 dem Zwischenkreis 3 zugeführt und insgesamt die Leistungsausbeute maximiert. According to the invention, multiple energy paths or multiple connections 4 and 7 are combined in such a way that the usable power increases to the sum of the connected powers. In other words, electrical energy/power is contributed to the main connection 4 by further connections as required, without there being a fixed assignment between consumers 1 , 2 and connections 4 and 7 . By measuring the power consumption at the main connection 4, the power of the further connection 7 is fed to the intermediate circuit 3 and the power yield is maximized overall.
Es versteht sich, dass auch weitere zweite Netzanschlüsse 7 vorhanden sein können. Die weiteren Anschlusspfade entsprechen dann dem Pfad am zweiten Netzanschluss 7 mit den Komponenten: optionales Netzfilter 18, galvanisch trennender Transformator 15, Gleichrichter 9 und DC/DC- Wandler 10, der den Zwischenkreis 3 (mit) speist. It goes without saying that other second mains connections 7 can also be present. The other connection paths then correspond to the path at the second mains connection 7 with the components: optional mains filter 18, galvanically isolating transformer 15, rectifier 9 and DC/DC converter 10, which (with) feeds the intermediate circuit 3.
Es versteht sich, dass auch mehr als zwei aus dem Zwischenkreis 3 gespeiste Stromrichter 11 und 14 zur Versorgung weiterer elektrischer Verbraucher vorhanden sein können. It goes without saying that more than two power converters 11 and 14 fed from the intermediate circuit 3 can also be present to supply further electrical loads.
Mittels der Erfindung ist eine maximale Leistungsausbeute der elektrischen Anschlussleistung beispielsweise einer Baumaschine mit zwei (oder mehr) Netz-Anschlüssen möglich. Aufgrund des galvanisch trennenden Transformators 15 findet keine Beeinflussung der Anschlüsse 4 und 7 untereinander statt. By means of the invention, a maximum power yield of the electrical connection power, for example of a construction machine with two (or more) mains connections, is possible. Because of the galvanically isolating transformer 15, the connections 4 and 7 do not affect one another.

Claims

- 7 - - 7 -
Patentansprüche Energieversorgungsvorrichtung (100) zur Versorgung von elektrischen Verbrauchern (1,Claims Energy supply device (100) for supplying electrical consumers (1,
2) mit elektrischer Energie, aufweisend: einen Zwischenkreis (3), einen ersten Netzanschluss (4), an den bestimmungsgemäß ein erstes Wechselspannungsnetz (5) anschließbar ist, einen ersten Gleichrichter (6), der dazu ausgebildet ist, eine Wechselspannung, die einer an dem ersten Netzanschluss (4) anstehenden Wechselspannung entspricht oder auf dieser basiert, gleichzurichten und die gleichgerichtete Spannung in den Zwischenkreis (3) einzuspeisen, einen zweiten Netzanschluss (7), an den bestimmungsgemäß ein zweites Wechselspannungsnetz (8) anschließbar ist, einen zweiten Gleichrichter (9), der dazu ausgebildet ist, eine Wechselspannung, die einer an dem zweiten Netzanschluss (7) anstehenden Wechselspannung entspricht oder auf dieser basiert, gleichzurichten, einen steuerbaren DC/DC-Wandler (10), der an einer ersten Seite mit der mittels des zweiten Gleichrichters (9) gleichgerichteten Spannung beaufschlagt ist und der an einer zweiten Seite mit dem Zwischenkreis (3) verbunden ist, einen ersten Stromrichter (11), der aus dem Zwischenkreis (3) gespeist ist und der zur Versorgung eines ersten elektrischen Verbrauchers (2) mit elektrischer Energie ausgebildet ist, eine Leistungsmesseinrichtung (12), die dazu ausgebildet ist, eine an dem ersten Netzanschluss (4) aufgenommene elektrische Leistung zu messen, und eine Steuereinrichtung (13), die mit der Leistungsmesseinrichtung (12) in Datenverbindung steht und die dazu ausgebildet ist, den DC/DC-Wandler (10) in Abhängigkeit von der an dem ersten Netzanschluss (4) aufgenommenen elektrischen Leistung anzusteuern. Energieversorgungsvorrichtung (100) nach Anspruch 1 , dadurch gekennzeichnet, dass für den Fall, dass die an dem ersten Netzanschluss (4) aufgenommene elektrische Leistung einen Schwellenwert überschreitet, die Steuereinrichtung (13) den DC/DC-Wandler (10) derart ansteuert, dass elektrische Leistung von dem zweiten Netzanschluss (7) in Richtung des Zwischenkreises (3) übertragen wird. Energieversorgungsvorrichtung (100) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass - 8 - die Steuereinrichtung (13) den DC/DC- Wandler (10) derart ansteuert, dass eine maximale von der Energieversorgungsvorrichtung (100) abgebbare elektrische Leistung einer Summe der an dem ersten Netzanschluss (4) maximal zur Verfügung stehenden elektrischen Leistung und der an dem zweiten Netzanschluss (7) maximal zur Verfügung stehenden elektrischen Leistung entspricht. Energieversorgungsvorrichtung (100) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Energieversorgungsvorrichtung (100) weiter aufweist: einen zweiten Stromrichter (14), der aus dem Zwischenkreis (3) gespeist ist und der zur Versorgung eines zweiten elektrischen Verbrauchers (1) mit elektrischer Energie ausgebildet ist. Energieversorgungsvorrichtung (100) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Energieversorgungsvorrichtung (100) weiter aufweist: einen galvanisch trennenden Transformator (15), wobei eine erste Wicklung (15a) des galvanisch trennenden Transformators (15) mit dem zweiten Netzanschluss (7) verbunden ist und eine zweite Wicklung (15b) des galvanisch trennenden Transformators (15) mit dem zweiten Gleichrichter (9) verbunden ist. Energieversorgungsvorrichtung (100) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der erste Netzanschluss (4) ein 32 A Netzanschluss ist. Energieversorgungsvorrichtung (100) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der zweite Netzanschluss (7) ein 16 A Netzanschluss ist. Baumaschine (1000), aufweisend: eine Energieversorgungsvorrichtung (100) nach einem der vorhergehenden Ansprüche, und einen elektrischen Antrieb (2), der mittels des ersten Stromrichters (11) der Energieversorgungsvorrichtung (100) mit elektrischer Energie versorgt ist. Baumaschine (1000) nach Anspruch 8, dadurch gekennzeichnet, dass die Baumaschine eine Dickstoffaustragevorrichtung (1000) zum Austragen von Dickstoff, insbesondere Mörtel, ist, wobei die Dickstoffaustragevorrichtung (1000) einen elektrischen Mischerantrieb (2) zum Mischen des Dickstoffes aufweist, der mittels des ersten Strom- - 9 - richters (11) der Energieversorgungsvorrichtung (100) mit elektrischer Energie versorgt ist. Baumaschine (1000) nach Anspruch 9, dadurch gekennzeichnet, dass die Dickstoffaustragevorrichtung (1000) weiter aufweist: einen elektrischen Kompressor (1) zum Erzeugen von Druckluft, der mittels des zweiten Stromrichters (14) der Energieversorgungsvorrichtung (100) mit elektrischer Energie versorgt ist. 2) with electrical energy, having: an intermediate circuit (3), a first mains connection (4) to which a first AC voltage mains (5) can be connected, a first rectifier (6) which is designed to convert an AC voltage which is a corresponds to the AC voltage present at the first mains connection (4) or is based on this, and to feed the rectified voltage into the intermediate circuit (3), a second mains connection (7), to which a second AC voltage mains (8) can be connected, as intended, a second rectifier (9), which is designed to rectify an AC voltage which corresponds to an AC voltage present at the second mains connection (7) or is based on this, a controllable DC/DC converter (10) which is connected on a first side to the means of the second rectifier (9) rectified voltage is applied and which is connected to the intermediate circuit (3) on a second side, a first power converter (11), which is fed from the intermediate circuit (3) and which is designed to supply a first electrical consumer (2) with electrical energy, a power measuring device (12), which is designed to measure a power supply connected to the first mains connection (4 ) to measure the electrical power consumed, and a control device (13) which is in a data connection with the power measuring device (12) and which is designed to switch the DC/DC converter (10) as a function of the power supplied to the first mains connection (4) to control the electrical power consumed. Energy supply device (100) according to Claim 1, characterized in that in the event that the electrical power consumed at the first mains connection (4) exceeds a threshold value, the control device (13) controls the DC/DC converter (10) in such a way that electrical power is transmitted from the second mains connection (7) in the direction of the intermediate circuit (3). Energy supply device (100) according to any one of the preceding claims, characterized in that - 8 - the control device (13) controls the DC/DC converter (10) in such a way that a maximum electrical power that can be delivered by the energy supply device (100) is a sum of the maximum electrical power available at the first mains connection (4) and the corresponds to the maximum electrical power available at the second mains connection (7). Energy supply device (100) according to one of the preceding claims, characterized in that the energy supply device (100) further comprises: a second power converter (14) which is fed from the intermediate circuit (3) and which is used to supply a second electrical load (1). electrical energy is formed. Energy supply device (100) according to one of the preceding claims, characterized in that the energy supply device (100) further comprises: a galvanically isolating transformer (15), wherein a first winding (15a) of the galvanically isolating transformer (15) is connected to the second mains connection (7 ) is connected and a second winding (15b) of the galvanically isolating transformer (15) is connected to the second rectifier (9). Energy supply device (100) according to one of the preceding claims, characterized in that the first mains connection (4) is a 32 A mains connection. Energy supply device (100) according to one of the preceding claims, characterized in that the second mains connection (7) is a 16 A mains connection. Construction machine (1000), comprising: an energy supply device (100) according to one of the preceding claims, and an electric drive (2) which is supplied with electrical energy by means of the first converter (11) of the energy supply device (100). Construction machine (1000) according to Claim 8, characterized in that the construction machine is a thick material discharge device (1000) for discharging thick material, in particular mortar, the thick material discharge device (1000) having an electric mixer drive (2) for mixing the thick material, which is first electricity - 9 - judge (11) of the energy supply device (100) is supplied with electrical energy. Construction machine (1000) according to Claim 9, characterized in that the thick matter discharge device (1000) further comprises: an electric compressor (1) for generating compressed air, which is supplied with electrical energy by means of the second converter (14) of the energy supply device (100).
EP21830648.8A 2020-12-08 2021-12-06 Energy supply device and construction machine Pending EP4260426A1 (en)

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