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:
Oct. 09, 2001
Filed:
May. 17, 1999
Rolf Mack, Sinzheim, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The electric motor drive includes an electric motor (,); an end stage (,) for triggering the electric motor; a trigger circuit (,) for pulse-width-modulated triggering of the end stage, which is associated with the end stage (,) and which includes an overload stage (,) for detecting an overload on the electrical motor according to a temperature of the electric motor and a device for obtaining a temperature from a pulse-width-modulation signal (,) generated by the trigger circuit (,). A preferred embodiment includes a device for integrating a differential power (P,) equal to an instantaneous power (P,) minus an equipment specific limit power (P,) in predetermined time intervals to obtain an integrated power (P,). The motor is turned on or off by comparison of the integrated power with various limiting values.