Siemens Aktiengesellschaft

Eupec Europaeische Gesellschaft Fuer Leistungshalbleiter Mbh & Co. Kg

Sebastian Raith

Bernd Segger

Reinhold Bayerer

Manfred Loddenkoetter

Reinhold Dillig

Tobias Hofmann

Helmut D&ouml;rfler

Kurt Goepfrich

Michael Kistner

Heiko Mueller

A multi-axes industrial processing machine with a multi-axes electrical drive system and at least two axle drives that have each an axle module and a built-in motor is disclosed. The machine further includes an impedance that is transformer-coupled with a supply module through an annular core. Either the phase lines on the AC side of the supply module or the output lines of the DC side of the supply module as well as an additional winding are wound on the annular core. The impedance is connected in parallel to the additional winding.

Multi-axes industrial processing machine

A power semiconductor module contains a power component and a sensor component. The power component is disposed on a first substrate. The sensor component is electrically and/or mechanically insulated from the power component by being disposed on an individual, separate second substrate. In this manner, disturbances of the sensor system section caused by the power section and its operation can be avoided particularly reliably.

Power semiconductor module

A circuit carrier ( ) (printed circuit board ) has two metallic outer layers ( ) and at least one metallic intermediate layer ( ). Insulating layers ( ) are arranged between the outer layers ( ) and the intermediate layer ( ). A component ( ) to be cooled and a cooling element ( ) are arranged on the outer layers ( ). The cooling element ( ) is thermally coupled to the component ( ) to be cooled via a heat conducting path. The heat conducting path runs partly in the intermediate layer ( ). Heat is transferred transversely in said path.

Circuit carrier, in particular printed circuit board

A method for reduction of natural system oscillations in an electric motor which is operated using a converter with a voltage intermediate circuit, by periodically decoupling the voltage intermediate circuit (U ) from the supply mains system (N) at times which are synchronized to triggering equipment for the input converter (E), in particular for as long as current is flowing through the mains system input inductor (L ).

Method for reducing natural system oscillations to ground potential in an electrical drive having a voltage intermediate circuit

A system and method for damping of resonant peaks in an electric motor which is operated using a converter with an intermediate voltage circuit, by means of a matched impedance to ground at the motor star point, and a corresponding electric motor is disclosed. In a converter system having an intermediate voltage circuit which operates with a mains system input inductor in the step-up converter mode or has other input-side inductances, there is a risk of natural system oscillations being formed via discharge capacitances in conjunction with motors. If the motor now has an amplitude/frequency response with a pronounced resonant frequency in the region of such natural system oscillations, then there is a risk of higher voltages occurring at the motor star point than in the motor phases. This is prevented by the present invention by a termination of the lattice network, which is formed by the winding sections, in the motor at the motor star point by means of a suitably selected impedance with respect to ground, which advantageously comprises a series circuit formed from a non-reactive resistance and a capacitance.

DAMPING OF RESONANT PEAKS IN AN ELECTRIC MOTOR WHICH IS OPERATED USING A CONVERTER WITH AN INTERMEDIATE VOLTAGE CIRCUIT, BY MEANS OF MATCHED IMPEDANCE TO GROUND AT THE MOTOR STAR POINT, AND A CORRESPONDING ELECTRIC MOTOR

In a converter system having an intermediate voltage circuit which operates with a supply network-side input inductor in the step-converter mode or has other input-side inductances, there is a risk of natural system oscillations being formed via discharge capacitances in conjunction with motors. If the motor now has an amplitude/frequency response with a pronounced resonant frequency in the region of such natural system oscillations, then there is a risk of higher voltages occurring at the motor star point (S) than in the motor phases (I, V, W). This is prevented by the present invention by introducing an impedance (Z), in particular at the input to the motor, in order to damp capacitive discharge currents to ground potential, which are caused by system oscillations (f ) (excited asymmetrically with respect to ground in the motor phases (U, V, W)) of the converter system (L , UR, LT, M) in the winding sections.

DAMPING OR RESONANT PEAKS IN AN ELECTRIC MOTOR WHICH IS OPERATED USING A CONVERTER WITH AN INTERMEDIATE VOLTAGE CIRCUIT, BY MEANS OF A TRANSFORMER-COUPLED DAMPING RESISTANCE, AND A CORRESPONDING ELECTRIC MOTOR

Growing community of inventors

Erlangen, Germany

Sebastian Raith