Sew-eurodrive Gmbh & Co Kg

Sew-eurodrive Gmbh & Co

Harald Wolf

Josef Schmidt

Zhidong Hua

Wolfgang Hammel

Matthias Hartmann

Manuel Heil

Jochen Mahlein

Thomas Schuster

Thomas Krempel

Thomas Uhl

Ralf Bennerscheidt

Detlev Schroeder

Christian Treier

Will Francis

Adam Miles

Alexander Heier

Andreas BÖSER

Andreas Wanjeck

Christopher Knab

Dennis Fabian

Ralph Mayer

Rainer Hillenbrand

Ralph Meyer

In an electrical appliance having a housing, a cable bushing projects through a recess in the housing, a cable is passed through the cable bushing, a printed circuit board including a luminous device is surrounded by the housing, the cable bushing is made of a transparent material, and the luminous device is adapted to project light into the cable bushing.

Electrical appliance with housing having an illuminated cable bushing

In a method for determining the rotor position of a three-phase machine without using a rotary encoder, and to a device for controlling a three-phase motor without using a rotary encoder, the three-phase machine is fed by a converter that can be operated by pulse-width modulation, and the converter has model variables for the rotor angle and the current indicator of the three-phase machine, and the converter has device(s) by using which, in control operation, at least two values are measured which represent a measure of the local inductances of the machine which represent a measure of the local inductances of the machine, the error of the model rotor angle is determined in that, depending on the model rotor angle and the model current indicator, at least two weighting factors are determined, and in that a weighted sum is formed from the at least two measured values and the at least two weighting factors, and in that a further offset value is substracted from the sum, which is likewise determined on the basis of the model rotor angle and the model current indicator.

Method for determining a rotor position of a three-phase machine without using a rotary encoder and device for controlling a three-phase motor without using a rotary encoder

In circuit board for a converter, including control electronics, the circuit board includes a device for current detection, the device respectively having at least two measuring amplifier circuits, only the output of one of the measuring amplifier circuits being supplied as the detected current value to the control electronics of the converter.

Circuit board, method for determining a current space vector, converter, circuit board and series of converters

In a method for determining the rotor position of a three-phase machine without using a rotary encoder, and a device for controlling a three-phase motor without using a rotary encoder, the three-phase machine is fed by a converter that can be operated by pulse-width modulation, and the converter has model variables for the rotor angle and the current indicator of the three-phase machine, and the converter has device(s) by using which, in control operation, at least two values are measured which represent a measure of the local inductances of the machine which represent a measure of the local inductances of the machine, the error of the model rotor angle is determined in that, depending on the model rotor angle and the model current indicator, at least two weighting factors are determined, and in that a weighted sum is formed from the at least two measured values and the at least two weighting factors, and in that a further offset value is subtracted from the sum, which is likewise determined on the basis of the model rotor angle and the model current indicator.

A method, circuit configuration and bridge circuit for charging a capacitance effective on the main current terminals of a semiconductor switch, in particular an intrinsic capacitance, in particular the drain-source capacitance of a MOSFET semiconductor switch or the collector-emitter capacitance of an IGBT semiconductor switch, the precharging, in particular the at least partial charging, of the effective capacitance being forcibly controlled via a charging current path.

Method, circuit configuration and bridge circuit for charging a capacitance effective on main current terminals of semiconductor switch

A method for determining the rotor position of a synchronous machine operated in field-oriented manner, which has an effective inductivity that is dependent on the rotor position,

Method for determining the rotor position of a synchronous machine operated in field-oriented manner

A converter includes at least device(s) for sensing the currents fed to the electric motor powered by the converter, the device(s) for current detection being arranged inside the converter, and the signals of the device(s) being fed to a nonlinear filter, whose output signals are fed to an additional filter that is connected to an analog-to-digital converter.

Converter for powering electric motor

An open-loop or closed-loop control method for a converter which supplies an electric motor, wherein a current space vector is acquired as motor current, and the motor voltage, in particular a voltage space vector, is set, an induced voltage space vectoris determined, which is forwarded to an integration element, a flux space vector being generated, whose angular position is perpendicular to the voltage space vector, the amount of the flux space vector corresponding to a predefined nominal value, the difference of the integration result and the flux space vector thus produced being used as feedback in the integration element.

Open-loop or closed-loop control method for a converter

System and method, including path sections,

Growing community of inventors

Ubstadt-Weiher, Germany

Harald Wolf