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:
Jul. 16, 2013
Filed:
Oct. 15, 2008
Roland Walter, Tiefenbronn, DE;
Jacek Wiszniewski, Alberhausen, DE;
Michael Maercker, Stuttgart, DE;
Klaus Dengler, Kornwestheim, DE;
Roland Walter, Tiefenbronn, DE;
Jacek Wiszniewski, Alberhausen, DE;
Michael Maercker, Stuttgart, DE;
Klaus Dengler, Kornwestheim, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The invention relates to a method for operating an electric motor () having a phase angle control with the following steps: Applying an AC voltage to a series connection of the electric motor () and a switching element (), particularly a triac, wherein the switching element () connects through by applying an ignition signal and suppresses the flow of a current if the amount of current falls below a holding current; determining the time of a zero crossing of a virtual motor current that would flow if the switching element () were connected through; and turning on the switching element () at an activation time that is dependant on the time of the zero crossing of the virtual motor current.