Still Gmbh

Sma Solar Technology Ag

Sieb & Meyer Ag

Inensus Gmbh

Stillgmbh

Still Sas

Torsten Leifert

Andreas Falk

Jens Friebe

Burkard Mueller

Burkard Müller

Dietmar Kubusch

Georg Fromme

Martin Hinkelmann

Hans-Georg Mittmann

Nico Peterschmidt

Jakob Schmidt-Reindahl

Jens-Uwe Mueller

Katrin Bystry

Rainer Buchhorn

Peter Witsch

Holger Peters

Christian Ruehling

Jens-Uwe MÜLLER

Francois Brouart

Lars Günther

Paulo Ferreira

Daniel Krupka

Christian Rühling

A half-bridge of a bidirectional converter is divided into a first and a second conduction path connected in parallel. In each of the conduction paths a switching element and a freewheeling diode are connected in series, and the center points of the conduction paths are connected via a second inductor. The second inductor is connected in series with a first inductor which is connected to the center point of the second conduction path. The half-bridge has two operating modes. In each of the two operating modes the switching element in one of the two conduction paths is clocked at a high frequency to cause a flow of energy in one of two directions between a pair of high voltage-side connections and a pair of low voltage-side connections to the half-bridge. The two switching elements are of different types, the switching element in the first conduction path causing higher switching losses.

Bidirectional converter with preferential direction and reactive power-capable inverter having said converter

A device for converting direct voltage from an electrochemical store or a fuel cell to alternating voltage, includes a two-stage design having a single DC/DC converter stage for generating an intermediate circuit voltage from the output voltage of the electrochemical store or the fuel cell, which converter stage converts, in particular raises, the direct voltage in a wide input voltage range directly to an intermediate circuit voltage with which a DC/AC converter stage can be operated to generate the alternating voltage. The single DC/AC converter stage generates the alternating voltage from the intermediate circuit voltage. The invention further relates to a method for actuating a device for converting direct voltage from a store or energy generator into alternating voltage for feeding into a supply network.

Apparatus for converting electric energy and method for operating such an apparatus

A feed converter system for small wind energy systems has a rectifier device and an inverter device disposed in a housing, and a common control device is provided for regulating the system components under different load cases, particularly when the wind energy system starts up, or when it is being operated at an optimal operating point.

Feed converter system

An industrial tow truck () includes an electrical traction drive system. At least one fuel cell unit () is used as the energy supply for the electrical traction drive system.

Industrial tow truck with electrical traction drive

An industrial truck, such as a fork-lift truck, has an electrical drive system and an energy supply based on gaseous media. At least one pressure vessel for the storage of at least one gaseous medium is installed in a mounting device which can be easily replaced together with the pressure vessel in the lower portion of the industrial truck () between the axles (). Devices necessary for the generation of electrical energy from the gaseous medium can be advantageously installed in the mounting device.

Industrial truck

A mobile machine, such as an industrial truck, includes at least two electrical drive systems (), at least one electrical control system () and at least one electrical power source (). Excess electrical energy generated during deceleration of at least one of the electrical drive systems () is fed to at least one other electrical drive system ().

Mobile machine

An industrial truck () is provided that includes an electrical drive and a fuel cell system (). A method for the operation of an industrial truck () with an electrical drive and a fuel cell system () is also provided. On the industrial truck () with an electrical drive and a fuel cell system () there can be at least one easily replaceable fuel reservoir (). The method teaches that at least one easily replaceable fuel reservoir () can be kept on hand at the operating location of the industrial truck ().

Industrial truck with an electrical drive and a fuel cell system and method for the operation of an industrial truck

An assembly having an electrical machine and a power electronics unit for use in a vehicle includes a housing part of the electrical machine connectable with a housing part of the power electronics unit at a seam between the two parts. Electrical pressure contacts are located in the vicinity of the seam between the two parts. Each pressure contact has one contact point located on the power electronics unit and one contact point located on the electrical machine. At least one contact point of a pressure contact is spring-loaded toward the other contact point of the same pressure contact.

Assembly having an electrical machine and a power electronics unit

Growing community of inventors

Vögelsen, Germany

Torsten Leifert