Siemens Aktiengesellschaft

Zf Friedrichshafen Ag

Continental Automotive Gmbh

Siemens Vdo Automotive Corporation

Walter Sohner Gmbh & Co. Kg

Günter Lugert

Stephan Bolz

Rainer Knorr

Randolf Mock

Carsten Schuh

Georg Bachmaier

Jens Dahl Jensen

Martin Götzenberger

Hellmut Freudenberg

Christoph Hamann

Heiner Bayer

Axel Ganster

Jörg Zapf

Thomas Riepl

Karl Smirra

Hubert Remmlinger

Erhard Magori

Robert Ingenbleek

Oliver Hennig

Michael Schwab

Andreas Rekofsky

Stefan Hackl

Simon Makar

Oliver Henning

Oskar Schütz

Tudor-Ion Gamulescu

Steven Bolz

Gerhard Göser

Andreas GÖDECKE

Bernhard Gottlieb

Methods and arrangements for determining the fineness of a ground material in a mill are provided, wherein the acoustic spectrum of the mill during the grinding process is used for concluding the fineness. The mill comprises a drum in which the ground material is present during the grinding process, said drum being driven by a magnetic drive having at least one magnetic segment during the grinding process, so that a rotating magnetic field generated with the aid of the magnetic drive causes the drum to rotate. In order to determine the acoustic spectrum, a voltage induced in a coil of the magnetic segment is determined at least intermittently. On the basis of a model, using the detected time-dependent induced voltage, conclusions can be drawn about the acoustic spectrum and therefrom about the fineness.

Determining the fineness of a ground material, in particular an ore, in a mill

In a method for the production of a gradient encapsulation layeron a piezoelectric actuator, based on this gradient encapsulation layer, the piezoelectric actuatordoes notrequire an additional housing-like enveloping structure in order to be protected externally. The gradient encapsulation layeris produced by cold gas spraying of particles having different material properties.

Piezoelectric actuator with encapsulation layer having a thickness-varying property gradient

In a method for producing a multilayer encapsulation () of a piezo actuator () such that the piezo actuator () is protected towards the outside without having to use an additional enveloping housing-type structure, in order to produce the multilayer encapsulation (), an electrically insulating elastic layer () is first applied to the surface of the piezo actuator (), whereupon a metallic layer is applied to the electrically insulating elastic layer () so as to planarly cover the same.

Piezo actuator comprising a multilayer encapsulation, and method for the production thereof

A device and method for equalizing the charges of series-connected individual cells of an energy storage device with a DC/DC converter, which draws energy from the energy storage device or from another energy source, charges an intermediate circuit capacitor whose voltage is inverted in a DC/AC converter, converts the alternating voltage via AC bus lines and coupling transformers by way of a rectifier into a pulsating direct current, and charges the cell having the lowest cell voltage with the pulsating direct current.

Device and method for equalizing charges of series-connected energy stores

A housing () with at least one electrical connection () through a housing wall () can be manufactured especially economically and can facilitate an especially economical lacing of electronic components () present on the interior and on the exterior of the housing (). The electrical connection () is enclosed by a housing material and additionally sealed by a sealing material (). The sealing material () also advantageously serves to seal a top () and a bottom () to the housing wall (). Through the combination of the casing of the electrical connection () of the housing () and the sealing material (), this arrangement is, moreover, especially impervious to oil or other aggressive media.

Sealing a controller

A switching device for bi-directionally equalizing charge between energy accumulators, particularly between capacitive energy accumulators in a motor vehicle electric system, includes: an integrated starter generator; a first connection coupled to the integrated starter generator; a second connection coupled to an energy source; a controllable transfer gate having a first load current-conducting path connected between the first and second connection, and a controllable switching controller having a second load current-conducting path connected between the first and second connection in parallel to the first load current-conducting path. There is also provided a motor vehicle electric system with such a switching device, and the implementation and use of a switching controller in a transfer gate for such a switching device.

Switching device for bi-directionally equalizing charge between energy accumulators and corresponding methods

A device for protecting electronic modules in a multivoltage on-board electrical wiring system comprising a first accumulator of a low on-board electrical wiring system voltage, against short circuits after a high on-board electrical wiring system voltage, consisting of a transistor whose drain-source path is inserted between the control device connection and the electronic module connection. The source connection of the transistor is linked to the electronic module connection. A gate resistor and a diode guiding the current in the direction of the plus pole of the first accumulator are parallel-mounted between the gate connection of the transistor and the plus pole of the accumulator. A Zener diode is arranged between the gate connection and source connection of the transistor.

Device for protecting electronic modules in a multi-voltage on-board electrical system against short circuits

The invention relates to an operating method for an electrical circuit with an energy store (), made from several storage elements (C-C) and a charge-equalisation circuit (), for charge equalisation between the individual storage elements (C-C) of the energy store (), comprising the following steps: charging the energy store () and charge equalisation between the individual storage elements (C-C) of the energy store () by means of the charge equalisation circuit (). The invention further relates to a corresponding electrical circuit for carrying out said operating method.

Circuit for a motor vehicle electrical distribution system and an associated operating method

Device for supplying power to a two-voltage vehicle electrical system equipped with safety-relevant components with an integrated starter-generator mechanically coupled with an internal combustion engine BKM, a double-layer capacitor DLC, a first and second energy accumulator B, B, with power being able to be supplied to safety-relevant components Vvia three safety switches Xto X, alternately by the starter-generator ISG, the double-layer capacitor DLC, the first or the second energy accumulator B, B

Device for supplying power to a two-voltage vehicle electrical system equipped with safety-relevant components

The invention relates to a method and a device for switching on a power switch (SS) arranged between capacitive elements (CDLC, B) a choke (L) being connected in parallel to the switching contacts of the still open power switch (SS). Said choke enables compensating currents to flow between the elements (CBDLC) to be interconnected and to decay before the power switch (SS) is then closed in a de-energized manner.

Method and device for switching on a power switch arranged between capacitive elements

The invention relates to a method for switching a semi-conductor circuit breaker by means of which the resistance of the breaker gap of the semi-conductor circuit breaker is controlled by a control voltage (Vst), such that the power loss (Pist) from the circuit breaker does not exceed a predetermined setpoint (Psoll). The invention also relates to a device for carrying out said method wherein a transfer gate, which is controlled by a charge pump, is used as a semi-conductor circuit breaker.

Method and device for switching a semi-conductor circuit breaker

A device and a method are provided for equalizing the charge of the capacitors belonging to a double layer capacitor. The device includes an individual transformer associated with each individual capacitor and a flyback transformer or a spool, from which the energy is transferred, via the individual transformers, to the individual transformer, by the respective low charge. Conclusions on the state of the double layer capacitor and the charge-equalizing switch are derived from the measured charging time and discharging time of the flyback transformer.

Device and method for equalising the charge of serially connected capacitors belonging to a double layer capacitor

A low-frequency PWM-modulated signal and a high-frequency, unmodulated signal for generating a high-frequency PWM-modulated signal is employed directly for driving an output stage of a device for noise suppression. The low-frequency signal and the high-frequency signal is advantageously provided by a microcontroller which already has an AD converter on the input side. The microcontroller furthermore already makes a PWM output signal with a high bit width available which has the high resolution necessary for driving the loudspeaker.

Drive circuit, device, and method for suppressing noise, and use

A circuit arrangement and also a method for controlling a bistable magnetic valve in which a magnetic valve is to be supplied with a pulse of electrical current in order to switch over the magnetic valve from a first stable state into a second stable state, comprises a power supply source to provide a supply voltage, a power supply device fed by the power supply source and able to be activated for the duration of the current pulse by an entered control signal (Enable) to create a coil current (I) flowing through the magnetic coil, with the coil current (I) being set to a setpoint, where changeover means are provided in order to reduce the setpoint of the coil current during the current pulse. This advantageously allows the power dissipation of the activation of bistable magnetic valves to be reduced.

Circuit arrangement and method for controlling a bistable magnetic valve

An auxiliary power source (HQ) constructed with conventional components for generating an auxiliary voltage lying above the voltage of a power supply source (U), in particular for triggering an n-channel MOS transistor (T) used as a high-side switch for switching a load (I). An energy store (L) is connected via a switching element (T) to the power supply source (U) and an auxiliary voltage is generated at a power output (U).

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Wuppertal, Germany

Günter Lugert