Siemens Aktiengesellschaft

Ulf Bormann

Jürgen Schimmer

Dirk Scheibner

Jürgen Zettner

Hans-Henning Klos

Martin Meyer

Hermann-Josef Wiegand

Dieter Munz

Torsten Vogt

Harald Günther

Michael Villnow

Dominik Tacke

With a method and a device for detecting a partial discharge at a winding of an electrical machine, electromagnetic first measuring signals are detected in a partial discharge frequency range and electromagnetic second measuring signals are detected in an interference frequency range. A time window around a first measuring signal is predefined, and an identification criterion is defined for a partial discharge signal and an interference signal criterion is defined for a second measuring signal. A determination is made as to a partial discharge when a first measuring signal is detected that meets the identification criterion and when, in the time window around the first measuring signal, no second measuring signal that meets the interference signal criterion is detected. A quality of the detected partial discharge is assessed based on a characteristic value of the second measuring signal.

Detection of a partial discharge

In a method for determining loading of a bearing supporting a rotor of an electrical machine, the rotational speed and angular acceleration of the rotor is determined, matrix elements of a matrix are assigned to respective ranges of the angular acceleration and to respective ranges of the rotational speed, when the electrical machine is operated in a respective range of the angular acceleration and the rotational speed corresponding to the respective matrix element for a predefined time unit, an elementary variable, for example a value of 1, is added to the respective matrix element, and the loading of the bearing is determined as a weighted sum of the matrix elements. Thus, the matrix forms a representation of the operating time of the bearing and of the service life over time in relation to the rotational speeds and angular accelerations. The loading can be shown on a display.

Method for determining loading of a bearing, a computer program product, a control facility and a drive

An automation system and a method for identifying and correcting connection errors of field devices that are connected to an automation system are provided. A connecting unit is used to optionally connect field device connections of an automation system with connections of a feed or measuring component of the automation system.

Automation system and method for identifying and correcting connection errors

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Altdorf, Germany

Ulf Bormann