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:
Jun. 13, 2006
Filed:
Mar. 04, 2005
Xavier Goumain, Montigny le Bretonneux, FR;
Jean Gatinois, Jouars Pontchartrain, FR;
Xavier Goumain, Montigny le Bretonneux, FR;
Jean Gatinois, Jouars Pontchartrain, FR;
Valeo Climatisation, La Verriere, FR;
Abstract
The invention relates to a system for controlling the speed of a motor () of an electric fan unit comprising a field-effect transistor () that controls the motor () using pulse-width modulation, the field-effect transistor () being connected to a circuit () comprising a voltage source () and a resistive element () in series, the circuit () is connected between the gate (G) of the field-effect transistor () and a second source (S) that is connected to a first source (S) of the field-effect transistor (), via an inductor () in order to allow a reduction in the slope of the current as the field-effect transistor () switches.