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. 07, 2003
Filed:
Mar. 29, 2000
Reinhard Maier, Herzogenaurach, DE;
Paul Fröhlich, Sulzbach-Rosenberg, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
In order to detect a motor temperature during operation of a motor without using any sensors, the motor temperature is determined when the motor is switched on by measuring a current and a voltage at the time when the motor is switched on. The motor temperature can be determined by relationships by determining the real element of the motor impedance from the current and voltage signals, and comparing the values when the motor is stationary and values which have been obtained at a known temperature. The determination can be carried out in analog or digital form, with a computer being used in the latter case.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile