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:
Aug. 14, 2001
Filed:
Aug. 21, 2000
Applicant:
Inventor:
Peter Busch, Augsburg, DE;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 1/5332 ; H02K 2/364 ; H02P 6/06 ; H02P 5/16 ;
U.S. Cl.
CPC ...
G06F 1/5332 ; H02K 2/364 ; H02P 6/06 ; H02P 5/16 ;
Abstract
A method and a circuit configuration for detecting the rotational speed of electronically commutated fans include measuring maximum current gradients of current fluctuations caused by the fan on its power supply lines, and adapting an amplification range and switching threshold of a comparator used as an input stage for a pulse former.