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:
Nov. 10, 2020
Filed:
Nov. 19, 2018
Applicants:
Dirk Hertz, Fichtenhof, DE;
Florian Ringer, Vilseck, DE;
Marco Schönenberg, Amberg, DE;
Inventors:
Assignee:
SIEMENS AKTIENGESELLSCHAFT, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P 7/29 (2016.01); H02P 7/282 (2016.01); H02P 1/18 (2006.01); H02M 3/155 (2006.01); F04D 25/08 (2006.01);
U.S. Cl.
CPC ...
H02P 7/29 (2013.01); F04D 25/08 (2013.01); H02M 3/155 (2013.01); H02P 1/18 (2013.01); H02P 7/282 (2013.01);
Abstract
Methods for controlling a voltage present at an electric fan during a startup of the fan are disclosed herein. The fan serves to generate a flow of air for cooling a device. The method includes applying an output voltage of a power supply, which serves to supply voltage to the device, to the fan; and switching on and switching off the output voltage of the power supply applied to the fan by a switch pulse-width-modulated-controlled by a control unit so that the Root Mean Square value of the current flowing through the fan is less than a startup current of the fan.