System

Abstract

System (100), comprising: a distributor unit (1), comprising: an input connection (2) to which an AC voltage grid (3) can be connected as intended, the AC voltage grid (3) providing a maximum electrical power; at least two output connections (4, 5); and a construction machine (6), comprising: an input connection (7) to be connected to one output connection (4) of the at least two output connections (4, 5) of the distributor unit (1) as intended, wherein the distributor unit (1) is designed to transmit data to the construction machine (6), said data indicating what electrical power is currently being output at the other output connection or connections (5) of the at least two output connections (4, 5) of the distributor unit (1), and wherein the construction machine (6) is designed to limit its electrical power consumption at its input connection (7) to a value that is such that a sum of the electrical power output at the at least two output connections (4, 5) of the distributor unit (1) does not exceed the maximum electrical power of the AC voltage grid (3).

Description

[0001] system

[0002] The invention is based on the object of providing an electrically supplied system by means of which an available electrical connection power on a construction site can be used as optimally as possible.

[0003] The system features an intelligent electrical distribution unit.

[0004] The distribution unit has an input connection to which a single-phase or multi-phase AC power system can be connected. The AC power system provides a maximum electrical output.

[0005] The distribution unit also has at least two output connections.

[0006] The system also features a partially or fully electric construction machine.

[0007] The construction machine has an input connection which is intended to be electrically connected to one of the output connections of the distribution unit.

[0008] The distribution unit is designed to transmit data to the construction machine indicating the electrical power currently being output at the other output terminal(s) of the distribution unit. To detect the electrical power currently being output at the other output terminal(s) of the distribution unit, the distribution unit has suitable hardware, such as a current sensor, etc. Data transmission between the construction machine and the distribution unit can be wired and / or wireless.

[0009] The construction machine is designed to limit its electrical power consumption at its input connection to a value that ensures that the sum of the electrical power output at the output connections of the distribution unit does not exceed the maximum electrical power of the AC voltage network. This ensures that the maximum electrical power of the AC voltage network is not exceeded, thus reliably preventing overloading of the AC voltage network. At the same time, the available electrical power is optimally utilized.

[0010] In one embodiment, the construction machine is designed to select its electrical power consumption at its input terminal such that a sum of the electrical power output at the output terminals of the distribution unit exactly corresponds to the maximum electrical power of the AC voltage network, of course only if an electrical power requirement of the construction machine results in the requested power being equal to or greater than the maximum electrical power of the AC voltage network.

[0011] In one embodiment, the construction machine is a slurry pump.

[0012] In one embodiment, the construction machine has an electrically driven hydraulic pump, which is used, for example, to drive thick material conveying cylinders.

[0013] In one embodiment, the maximum electrical output is 75 kW.

[0014] In one embodiment, the system comprises another construction machine that is intended to be connected to the other output port(s) of the at least two output ports of the distribution unit. The other construction machine can be, for example, a construction crane, etc.

[0015] Electric concrete pumps currently require up to 125 A of connected current or the corresponding connected load for electrical pumping, as the electric drive of the concrete pump is designed for this power. Accordingly, a connector or connection on the construction machine or concrete pump is provided that is geometrically and electrically dimensioned for this connected load.

[0016] On construction sites equipped with a 125 A supply, there is usually only a single 125 A connection. If a construction crane is on site, it is often connected to the only 125 A connection. The construction machine or concrete pump can then no longer be connected to the 125 A connection.

[0017] According to the invention, a junction box or distribution unit is provided that provides at least two 125 A connections or sockets: one connection is provided, for example, for the construction crane, and the other connection is provided for the construction machine. For example, a current measuring device is provided in the distribution unit that measures the current currently being drawn by the construction crane. This measured current value is transmitted to the construction machine or its control device, whereby the construction machine subsequently reduces its power consumption to such an extent that the current limit of 125 A is not exceeded. The invention is described below with reference to the drawing. Herein:

[0018] Fig. 1 shows a highly schematic view of a construction site with a construction crane and a system according to the invention comprising a distribution unit and a construction machine.

[0019] Fig. 1 schematically shows a construction site with a construction crane 8 and a system according to the invention comprising a distribution unit 1 and a construction machine in the form of a concrete pump 6.

[0020] The construction machine 6 has an electrically driven hydraulic pump 11, which serves to supply hydraulic consumers, for example in the form of hydraulic drive cylinders, etc.

[0021] The distribution unit 1 has an input connection 2, to which an AC voltage network 3 can be connected, provided here as an example by a construction site power distribution board 9 with a single 125 A connection. The AC voltage network 3 provides a maximum electrical power, here as an example 75 kW corresponding to 125 A.

[0022] The distribution unit 1 has two output connections 4 and 5.

[0023] The construction machine 6 has a 125 A input connection 7, which is intended to be connected to one of the output connections 4 or 5 of the distribution unit 1. In this case, the construction machine 6 or its 125 A input connection 7 is connected to the output connection 4 of the distribution unit 1, and the construction crane 8 is connected to the output connection 5 of the distribution unit 1.

[0024] The distribution unit 1 is designed to transmit data to the construction machine 6 indicating which electrical power or corresponding current is currently being output to the construction crane 8 at the other output connection 5 of the distribution unit 1. In this case, 25 A is output at the construction crane connection 5, for example.

[0025] Data transmission between distribution unit 1 and construction machine 6 can be wireless and / or wired. In this example, data transmission occurs via a dedicated data line 10.

[0026] The construction machine 6 is designed to limit its electrical power consumption at its input terminal 7 to a value such that a sum of the electrical power output at the two output terminals 4 and 5 of the distribution unit 1 does not exceed the maximum electrical power of the AC voltage network 3.

[0027] In this case, the construction machine 6 limits its power consumption or the corresponding current consumed to 100 A, so that in total exactly 125 A or 75 kW are drawn from the AC voltage network 3.

[0028] According to the invention, the AC voltage network 3 can therefore always be used with its maximum connected load when required, with two 125 A connections being available through the distribution unit 1, although the construction site power distributor 9 only provides a single 125 A connection.

[0029] It is understood that the distribution unit 1 can also have more than two output connections.

Claims

A system (100) comprising: a distribution unit (1), comprising: an input connection (2) to which an AC voltage network (3) can be connected as intended, wherein the AC voltage network (3) provides a maximum electrical power, and at least two output connections (4, 5), and a construction machine (6), comprising: an input connection (7) which is intended to be connected to an output connection (4) of the at least two output connections (4, 5) of the distribution unit (1), wherein the distribution unit (1) is designed to transmit data to the construction machine (6) indicating which electrical power is currently being output at the other output connection(s) (5) of the at least two output connections (4, 5) of the distribution unit (1), and wherein the construction machine (6) is designed to limit its electrical power consumption at its input connection (7) to a value such thatthat a sum of the electrical power output at the at least two output terminals (4, 5) of the distribution unit (1) does not exceed the maximum electrical power of the AC voltage network (3). System (100) according to claim 1, characterized in that the construction machine (6) is designed to select its electrical power consumption at its input terminal (7) such that a sum of the electrical power output at the at least two output terminals (4, 5) of the distribution unit (1) exactly corresponds to the maximum electrical power of the AC voltage network (3) if an electrical power requirement of the construction machine (6) is equal to or greater than the maximum electrical power of the AC voltage network (3). System (100) according to one of the preceding claims, characterized in that the construction machine (6) is a slurry pump. System (100) according to one of the preceding claims, characterized in thatthat the construction machine (6) has an electrically driven hydraulic pump (11)., System (100) according to one of the preceding claims, characterized in that the maximum electrical power is 75 kW. System (100) according to one of the preceding claims, characterized in that the system comprises a further construction machine (8) which is intended to be connected to the other output terminal(s) (5) of the at least two output terminals (4, 5) of the distribution unit (1).

Images