Kuka Roboter Gmbh

Kuka Deutschland Gmbh

Sebastian Zehetbauer

Michael Langhans

Gerhard Werner

Roberto Scibilia

Matthias Zimmermann

A voltage converter, which is configured as a step-down converter for reducing an input direct voltage to an output direct voltage lower than the input direct voltage, includes a first step-down converter circuit arrangement, having a first semiconductor switching element with a first control input, a first coupled choke having a first freewheeling diode, and a first input capacitor and a first output capacitor. A second step-down converter circuit arrangement, includes a second semiconductor switching element having a second control input, a second coupled choke having a second freewheeling diode, and a second input capacitor and a second output capacitor. An associated control device controls the voltage converter.

Voltage converter

An electrical device includes an electrical load, an electronic switch with an electronic switching element and a driver controlling the electronic switching element, and at least one pulsed power supply having a power unit coupled with the electronic switching element and configured to generate an electrical supply current for the electrical load from a voltage based on alternately turning on and off the electronic switching element. During operation of the power supply, an electrical current associated with the electronic switching element flows through a current path. A pulse transformer has a primary side coupled with the power unit such that the electrical current flows through a primary-side winding. A comparator compares a secondary-side electrical voltage or a filtered secondary-side electrical voltage of the transformer, and an evaluation device coupled with the comparator detects potential defects of the electronic switch based on the result of the comparison.

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

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.

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Munich, Germany

Sebastian Zehetbauer