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:
Sep. 04, 2001
Filed:
Dec. 16, 1998
Alain Gousset, Nanterre, FR;
Philippe Guibert, Chatou, FR;
Schneider Electric SA, Boulogne Billancourt, FR;
Abstract
An electronic device for modeling the temperature of a motor by utilizing signals output from current sensors placed on motor power supply phases. Signals from the current sensors are sent to an interface that outputs a voltage which is an image of a summation a ratio of the motor currents sensed by each of the current sensors to a corresponding adjustment current for each of the phases. A calculation circuit utilizes the voltage as an input and outputs a charging current wave stream, the amplitude and the duration of the charging current being proportional to the summation the ratio. An RC type modeling circuit is provided to receive the charging current wave stream and to model the thermal state of the motor based on the charging current wave stream.