Siemens Aktiengesellschaft

Valeo Siemens Eautomotive Germany Gmbh

Kurt Göpfrich

Hubert Schierling

Günter Schwesig

Albrecht Donat

Peter Jänicke

Stefan Völkel

Richard Brune

Manfred Karasek

Franz Imrich

Peter Heidrich

Olaf Hadrich

Susanne Gaksch

The invention relates to an energy recovery rectifier device (), in particular for an industrial plant (), for connection to an AC system (), comprising an energy recovery rectifier () and a buffer capacitor () that is connected in parallel to the DC side () of the energy recovery rectifier (). A step-up converter () is connected between the buffer capacitor () and the energy recovery rectifier (). The invention further relates to a method () for operating an energy recovery rectifier device () as well as to an industrial plant () comprising an energy recovery rectifier device ().

Energy recovery rectifier device

A wide voltage converter includes a power-supply-side converter unit, n load-side converter units, and a step-up/step-down converter device having n transformers. The step-up/step-down converter device electrically connects the power-supply-side converter unit to the n load-side converter units. The wide-voltage-range converter is capable of operating without derating with n specified output voltages, which can be predetermined independent from one another, and reliably inhibits restart.

Wide-voltage-range converter

The invention relates to a drive control for an electric drive with a secure electrical separation of power element and control element. The aim of the invention is to reduce the number of components such as optic couplers and buffer amplifiers between the power element and a control electronics. To this end, a suitable electrical transformer (U) is inserted in a digital communication interface (K) between the control unit (R) and the control electronics (A) for the purpose of providing a secure electrical separation. To make use of a transformer (U) possible, a non-zero frequency encoding, for example a Manchester encoding, is carried out. Alternatively, an Ethernet physics can be used to provide a suitable communication interface. The transformer electrically insulates the two communication paths from each other that are provided in an Ethernet physics and preferably has little coupling capacity and a low attenuation factor.

Drive control for an electric drive with a secure electrical separation of power element and control element

Control system for supply recovery of energy from a three-phase network

A power-line filter for operation with a converter is provided having a regulated voltage source and sinusoidal phase currents, with the power-line filter helping to eliminate interference voltages particularly in the frequency range from 2 kHz to 150 kHz, which are normally not taken into account. The leakage currents to ground, in this context, can be minimized to the point that it is possible to operate the converter in an (AC/DC sensitive) Interference Filter (IF) protective circuit-breaker.

Damping filter arrangement for converters having a regulated voltage

A method and a circuit arrangement for shaping any actual a.c. voltage characteristic into any reference a.c. voltage characteristic are described, which store the excess power in voltage overshoots in the form of a current in a current storage device using power electronic switching elements, and thus they compensate for the power deficiency when there is a voltage shortfall. The power electronic switching elements are driven by a digital automatic state machine through appropriate control pulses so that there is no fixed switching rate. The preferred field of application is for active filtering of the voltage of an electric three-phase or a.c. power supply system.

Method and circuit arrangement for shaping a.c. voltage

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Erlangen, Germany

Kurt Göpfrich