Robert Boschgmbh

Holger Sievert

Stefan Butzmann

Juergen Hachtel

Guenther Hertlein

Peter Feuerstack

Marc Micke

Gerd Lorenz

Vicente Garcia Alvarez

The present invention relates to a method for operating a security device, comprising a housing with at least one current-carrying element, wherein the current-carrying element is arranged in the housing interior and is enclosed by the housing. A particle detector is arranged in the housing interior, which monitors the housing interior with respect to the formation of particles.

Method for operating a safety device

The invention relates to a method and a device for detecting a current in a measuring path, the current in said measuring path corresponding to a current in a power path. An electric current is detected by a current measuring instrument in the measuring path, while simultaneously part of the electric current is conducted parallel to the current measuring instrument by a bypass device, in order to reduce the load on the current measuring instrument.

Current detection device and method for sensing an electric current

The invention relates to a circuit arrangement having a switching device () which is designed to provide a first voltage (U) and a first electrical current (I) in a power path and to provide a second voltage (U) and a second electrical current (I) in a measuring path for the duration of a switching period, wherein the first electrical current corresponds to the second electrical current; having a current measuring apparatus () which is arranged in the measuring path and is designed to provide an output signal (U) which corresponds to the first electrical current; and having a control circuit () which is designed to activate the current measuring apparatus for the duration of a measuring period and to deactivate the current measuring apparatus again after the measuring period expires.

Circuit arrangement and method for current measurement

The invention relates to the evaluation of a variable of an electric current in a power path by evaluating another electric current in a measuring path. To avoid excessively large electric currents in the measuring path, the current in said path is limited to a predetermined maximum limit value.

Current detection device and method for sensing an electrical current

The invention relates to a semiconductor switch and to a method for determining a current in the power path of a semiconductor switch. For this purpose, a semiconductor switch, according to the invention, has a plurality of sense connections, wherein each of said sense connections provides an individual output signal that is proportional to the current in the power path of the semiconductor switch. The evaluation of the current in the power path can be optimized by the appropriate selection of one of the plurality of sense connections in accordance with the current in the power path of the semiconductor switch.

Semiconductor switch and method for determining a current through a semiconductor switch

A method and a device for measuring the speed of a pulse-activated electric motor are described. According to this method, the motor is fully activated at time intervals to be determined for a defined measuring time by the circuit element provided for timing and, in this time, the frequency of the current ripples, which is proportional to the motor speed, is measured. A current-proportional voltage measuring device is located on the circuit element, on whose load side are located an amplifier, filters, and an evaluation circuit in the form of a comparator for determining the frequency of the current ripples flowing in a measured phase during which the motor is fully activated.

Method and device for measuring the rotational speed of a pulse-activated electric motor based on a frequency of current ripples

A method and a system for detecting the speed of a pump motor of a hydraulic pump system are provided, in which pump system a pump is driven by a pump motor to deliver hydraulic fluid into a pump reservoir. In accordance with the present invention, a pressure signal representing the fluid-delivery activity of the pump is detected, and the pressure peaks within this pressure signal identified. The speed of the pump motor is determined on the basis of the frequency or the time intervals of these pressure peaks.

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Ludwigsburg, Germany

Holger Sievert