Robert Boschgmbh

Arnim Fiebig

Rainer Glauning

Stefan Roepke

Volker Bosch

Hans-Joachim Baur

Guenter Lohr

Guenther Lohr

Friedrich Hornung

Manfred Kirn

Bernd Wirnitzer

Gunter Schaal

David Matzo

Rupert Weber

An equipment system includes a battery unit () having a monitoring circuit (), which detects at least one operating parameter of the battery unit () and furnishes a control signal, dependent on the operating parameter, for switching means (). The switching means control the charging and discharging process of the battery unit () and are located in the electrical device () and in the charger (), respectively. From the battery unit (), the control signal is transmitted to the switching means () in the electrical device () and in the charger (), respectively. By this provision of shifting the switching means () out of the battery unit () into the electrical device () and into the charger (), respectively, the heat development in the battery unit () and also its structure size are reduced.

Equipment system comprising a battery-operated electrical device, a rechargeable battery unit, and a battery charger

An operating mechanism for an electrical apparatus (), in particular, for a hand-held machining tool, includes a storage () for inputting of control data and/or a control program for controlling the electrical apparatus (), as well as a control unit () connected with the storage () for controlling the operation of the electrical apparatus () according to the stored control data or the stored control program. The storage () in operation is re-writable, in order to enable the control program or the control data upon assembly to operate according to apparatus specifications or the control program or to adjust the control data during the operation. In addition, the invention relates to an electrical apparatus with the above-type of operating mechanism and a corresponding method of operation.

Operating mechanism, electrical apparatus, and associated method of operation

A monitoring device for an electrical machining tool, in particular for temperature monitoring with an accumulator-driven machine, includes a switch element () for separating an electrical consumer () from a current supply device (). For detection of a first operating parameter (T) of the consumer () and/or the current supply device (), a first sensor () is provided, whereby the first sensor () is connected with a display unit and/or with the control input of the switch element, in order to control the switching process as a function of the first operating parameter (T). Furthermore, the present invention relates to an electrical machining tool as well as a current supply device with the inventive monitoring device and a corresponding method of operation.

Monitoring device, electrical machine tool, current supply device, and associated method of operation

A leveling device has a housing, a support surface which is fixed with the housing, an adjusting device including at least one adjusting screw which is displaceable outwardly and has an adjusting thread which is engageable with a counter thread for adjusting the adjusting screw, the counter thread being formed as a partially side of a slider which is displaceable transversely to a longitudinal axis of the adjusting screw and disengageable from the adjusting thread.

Leveling device

Charging device for charging a plurality of batteries based on parameter

To provide sufficient magnetization to the field of a series motor when the series motor is to be operated in dynamic braking mode, with a dissipating resistor or short circuit element (4) connected across the armature (5), a circuit connection is established between one of the main terminals of the motor through the series field to supply a minimum magnetization current, at least when the motor operates under dynamic braking conditions, typically a few to up to 15% of no-load current of the motor. This is sufficient magnetization so that, even in larger motors where remanent magnetism of the field structure is insufficient, reliable dynamic braking can be ensured. A switch (S; S.sub.1, S.sub.2) selectively connects the motor armature for motor drive or running operation and dynamic braking operation. The magnetization current supply can be through a capacitor, resistor, or resistor-capacitor combination, which can be permanently connected across the power supply (10, 11) of the motor, or connected in circuit only when the switch (S, S.sub.2) changes the motor into dynamic braking operation.

Electrical series motor with dynamic braking circuit

For driving each power transistor of a three phase bridge rectifier for utilizing d.c. electric power for the control and energization of a motor, each individual power transistor is provided with an individual driver circuit supplied an individual power supply. Each power transistor in such a rectifier has a reverse voltage free wheeling diode connected between emitter and collector. Each individual driver circuit has its input control signal supplied through a galvanic isolation stage in the form of an optical coupler and the power supply has its input connection to a source of power galvanically isolated by a transformer, supplying a relatively high frequency for powering the rectifier of the driver power supply. The final driver stage utilizes Darlington transistor combinations of complementary types, one Darlington combination being supplied with negative voltage and the other being supplied with positive voltage, by the power supply rectifier. The intermediate neutral voltage of the rectifier is connected galvanically to the emitter of a power transistor and the output connection coming from the junction of the two Darlington combinations is connected to the base electrode of the power transistor. The collector of the power transistor is connected to the control logic state that controls the driver input, this connection being made through a diode (60) for preventing the power transistor from being turned on while the reverse relief diode of the power transistor is conducting. The control logic circuit has a first bistable circuit (35) for setting the on periods of the driver and power transistor and a second bistable circuit (51,53) for registering an error condition and responding thereto by preventing the setting of the first bistable circuit.

Growing community of inventors

Leinfelden-Echterdingen, Germany

Arnim Fiebig