Refractory Intellectual Property Gmbh & Co. Kg

B&r Industrial Automation Gmbh

Bernecker + Rainer Industrie-elektronik Ges.m.b.h.

Senoplast Klepsch & Co., Gmbh

Johann Eder

Johann Kappacher

Alois Holzleitner

Elmar Bohatsch

Marco Grugger

Klaus Doppelhammer

Christian Schneider

Gerald Gelbmann

Rainer Neuböck

August Huber

Bernd Lutz

Gerhard Mayrhofer-Huber

Roland Scharinger

Harald Unterberger

Thomas Peis

To determine the temperature of a link capacitor (C) of a link converter () more accurately with less expenditure, a device and a method are described, in which the link capacitor (C) is modeled as a series interconnection of an equivalent capacitance (CS) and an equivalent series resistance (ESR), wherein a modeled capacitor current (i) flows across the equivalent series resistance (ESR). A modeled capacitor power loss (P), from which the capacitor temperature (T) is determined by means of a specified temperature model, is calculated from the modeled capacitor current (i) and the value of the equivalent series resistance (ESR) by means of a first relationship of the form P=f(i, ESR). Direct measurement of the capacitor temperature (T), of the capacitor current (i), or of the capacitor power loss (P) is not required. For example, a measurement of the capacitor voltage (u) and a further calculation of the modeled capacitor current iand finally of the capacitor power loss (P) are sufficient. The method can be used for the monitoring and processing of the capacitor temperature (T), particularly the switching-off of an element, preferably at least part of the link converter (), when a maximum temperature, such as a preset maximum temperature, is exceeded. The method can also be used to determine the temporal progression of the capacitor temperature (T(t)) and also to determine the remaining service life (RL) of the link capacitor (C) of a specified relationship, preferably by means of the Arrhenius formula.

Temperature of a link capacitor

The different electrical components and cables arranged in the B flange of an electric motor can be installed only with difficulties and are complicated and time-consuming due to the restricted space conditions in the B flange. In order to improve this, it is proposed to recess the B flange'sfront sidefacing away from the electric motorat least in sections with respect to an imaginary surface normal to the longitudinal axisof the electric motorin the direction toward the motor housing, and to shape the B flange cover'sfront face resting against the B flangein a mirror-inverted manner to thereby improve the accessibility to the inside of the B flange

Electric motor with integrated electrical components in the B flange

The invention relates to a refractory ceramic batch made of 30 to 95% by mass of a synthetically manufactured fine component selected from the group consisting of: fused forsterite, sintered forsterite, each in a grain size &#x3c;1 mm, further 5 to 70% by mass of at least one coarse component selected from the group consisting of: sintered magnesia, fused magnesia, each in a grain size &#x3e;1 mm, up to 5% by mass of a sintering aid and not more than 5% by mass of at least one other component, wherein the components sum up to 100% by mass. The invention further comprises a workpieces made of this batch and the use of said workpiece as a checker brick.

Fireproof ceramic mix, fireproof ceramic molded body formed of said mix and use thereof

The invention relates to a composition for the production of a refractory ceramic moulded body, a non-fired or fired moulded body formed from the composition and a possibility for use.

Batch for producing a refractory ceramic shaped body, shaped body made therefrom, and a use thereof

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Michaelbeuern, Austria

Johann Eder