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:
Dec. 08, 2015
Filed:
Apr. 20, 2012
Applicant:
Ingo Dwertmann, Heilbronn, DE;
Inventor:
Ingo Dwertmann, Heilbronn, DE;
Assignee:
Robert Bosch GmbH, Stuttgart, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P 25/08 (2006.01); H02P 6/18 (2006.01);
U.S. Cl.
CPC ...
H02P 6/182 (2013.01); H02P 6/186 (2013.01);
Abstract
The invention relates to a method for the sensorless commutation detection of electronically commutated electric motors, in which the phase current is interrupted for a blanking time in order to detect the zero passage. On the basis of the profile of the mutual induction voltage, a decay time, which is characteristic for a decay of the phase current, is determined within the blanking time and the start of the blanking time is determined as a function of the time difference between the decay time and the end of the blanking time.