Liebherr-elektronik Gmbh

Alfred Engler

Hans-Peter Lavergne

Andreas Munding

Nejat Mahdavi

Ralf Cremer

Rodolphe De Maglie

Sebastian Braun

Ingo Nannen

Christian Thuerigen

Joachim Ballmann

Markus Dropmann

Rainer BÜSCHING

Gaetan Osvald

Heyje Park

Jürgen Engstler

The disclosure relates to an electrical drive system for a work machine, in particular a mining truck, having at least two electrical drive motors that can each be regulated independently of one another via an associated inverter, wherein the drive system has a DC voltage power supply for the energy supply of the at least two drive motors, characterized in that at least one voltage divider is arranged in parallel with the DC voltage power supply whose partial voltages can be provided at the DC voltage inputs of the at least two inverters.

Electrical drive system for a work machine having two electric motors that can be regulated independently of one another

The present disclosure relates to a piston-cylinder unit with a cylinder jacket and a piston rod longitudinally shiftably guided in the cylinder jacket as well as an evaluation unit which determines the position of the piston rod with respect to the cylinder jacket by the intrinsic electrical properties of an interconnection of cylinder jacket, piston rod and piston, wherein the piston rod is short-circuited against the cylinder or the cylinder head in a manner suitable for high frequencies via one or more contact elements in the region of the exit opening of the piston rod out of the cylinder head.

Piston-cylinder unit with evaluation unit for determining the piston position

The invention relates to a method for determining the piston position of a hydraulic or pneumatic piston cylinder unit, wherein the cylinder jacket and the piston form an electrical conducting path and the piston position is determined with the aid of the inductive and/or resistive properties of the conducting path that is formed. In addition, the invention relates to a piston cylinder unit having a measuring device for carrying out such a method.

Method for determining the piston position of a piston cylinder unit and a piston cylinder unit

The present disclosure relates to a piston-cylinder unit with a device for determining position, the device comprising at least one exciter that is indirectly or directly electrically connected with the cylinder jacket and the cylinder piston of the piston-cylinder unit, and that excites the electrical oscillating circuit formed by the piston-cylinder unit and the contact lines to oscillate at its resonant frequency, it being possible to measure an electrical signal characterizing the resonant frequency on the piston-cylinder unit. The invention also relates to a construction machine or piece of hoisting equipment with such a piston-cylinder unit.

Piston-cylinder unit with device for determining position

The present disclosure relates to a position measuring device for a fluidic cylinder, which includes a cylinder jacket and a piston rod longitudinally movable in the cylinder jacket, wherein the position measuring device includes an evaluation unit which determines the position of the piston rod with respect to the cylinder jacket with reference to the intrinsic capacitance of the capacitor formed by cylinder jacket, piston rod and a dielectric fluid acting as a dielectric.

Position measuring device for a fluidic cylinder

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Sigmarszell, Germany

Alfred Engler