The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 26, 2010
Filed:
Jan. 31, 2006
Ulrich Höhn, Hollstadt/Junkershausen, DE;
Hans-werner Lipot, Bad Neustadt, DE;
Markus Platen, Bad Neustadt, DE;
Ulrich Höhn, Hollstadt/Junkershausen, DE;
Hans-Werner Lipot, Bad Neustadt, DE;
Markus Platen, Bad Neustadt, DE;
Siemens Aktiengesellschaf, München, DE;
Abstract
According to the method a temperature module is defined, simulating the thermal behavior in the electric motor (), based on a multi-mass model. The rotational speed (n) and the current (i) for the electric motor () are continuously recorded as input parameters for the temperature model and at least one bearing power loss and/or bearing inner temperature (TIL), corresponding to a bearing (), is continuously derived from the temperature model. A first warning signal (W) is given when a computer-determined bearing power loss exceeds a given comparative value. Furthermore, a second warning signal (W) is given when a computer-determined bearing inner ring temperature exceeds a given temperature difference (ΔT) from a corresponding computed bearing outer ring temperature (TAL'). The thermal behavior of non-accessible components, in particular, the bearing (), can thus advantageously be determined by mere evaluation of the current (i) and the rotational speed (n). The fitting of temperature sensors () in the electric motor () can also be avoided.