Kuka Roboter Gmbh

Kuka Deutschland Gmbh

Michael Langhans

Sebastian Zehetbauer

Thomas Pfister

Andreas Fischer

A method for controlling a servomotor with a converter includes monitoring a circuit of a direct-voltage DC link that is connected to an input circuit for flow of an electric current; switching off a first switching device to end the supply of the direct-voltage DC link from an electrical grid if a stop signal occurs; braking the servomotor by control of power semiconductor switches of an inverter circuit in a regenerative braking operation, to reduce the rotation speed of the servomotor, if the monitoring detects that an electric current is not flowing after the first switching device has been switched off; and switching off a second switching device to prevent feeding electrical energy from the direct-voltage DC link into the servomotor if the monitoring detects a flow of electric current after the first switching device has been switched off.

Method for controlling at least one servomotor, associated control device, robot and computer program product

An electrical device having a clocked circuitry, and a method for testing the power supply unit of the electrical device. The electrical device comprises an electrical load, a clocked power supply unit, at least one pulse transformer and an evaluation device. The power supply unit comprises a power stack having at least one power semiconductor switch and is configured for generating a clocked voltage for the electrical load from an electric voltage based on an alternating on/off switching of the power semiconductor switch. The power stack exhibits at least one current path, through which an electric current flows during operation. The pulse transformer generates a signal assigned to the change in the charge and/or the direction of the electric current flowing through the current path. The evaluation device evaluates the signal coming from the pulse transformer and draws a conclusion regarding the operational reliability of the power semiconductor switch.

Electrical device with a pulsed power supply and method for testing the power supply of the electrical device

An electronic power circuit, electrical machine and a method for verifying the functionality of an electronic power circuit. The invention relates to an electronic power circuit, an electrical machine with the electronic power circuit and a method for verifying the functionality of the electronic power circuit. The electronic power circuit comprises a power unit with at least one power semi-conductor switch, which is equipped to generate a pulsed electrical voltage for an electrical consumer from an electrical voltage on the basis of an alternating powering on and off of the at least one power semiconductor switch, and control electronics equipped to control the power semiconductor switch for the alternating powering on and off.

Electronic power circuit, electric motor, and procedure for checking the operability of an electronic power circuit

The invention relates to a measuring device () for ascertaining a torque acting on an axis (A,) and to a robot () with a robot arm () having a plurality of members which are rotatably mounted in reference to axes (A-A). The robot () also has the measuring device (), in order to determine for at least one of the axes (A) the torque exerted on that axis (A).

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Balzhausen, Germany

Michael Langhans