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, 2007
Filed:
Sep. 12, 2003
Marc Micke, Kornwestheim, DE;
Holger Sievert, Ludwigsburg, DE;
Juergen Hachtel, Moeckmuehl, DE;
Guenther Hertlein, Fichtenberg, DE;
Marc Micke, Kornwestheim, DE;
Holger Sievert, Ludwigsburg, DE;
Juergen Hachtel, Moeckmuehl, DE;
Guenther Hertlein, Fichtenberg, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A method and a device for measuring the speed of a pulse-activated electric motor are described. According to this method, the motor is fully activated at time intervals to be determined for a defined measuring time by the circuit element provided for timing and, in this time, the frequency of the current ripples, which is proportional to the motor speed, is measured. A current-proportional voltage measuring device is located on the circuit element, on whose load side are located an amplifier, filters, and an evaluation circuit in the form of a comparator for determining the frequency of the current ripples flowing in a measured phase during which the motor is fully activated.