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:
Jan. 09, 2007
Filed:
Jul. 22, 2004
Sergei Kolomeitsev, Rochester Hills, MI (US);
Joseph P. Whinnery, Pontiac, MI (US);
Thomas Gallagher, Lake Orion, MI (US);
Hong Jiang, Rochester Hills, MI (US);
John Suriano, Auburn Hills, MI (US);
Sergei Kolomeitsev, Rochester Hills, MI (US);
Joseph P. Whinnery, Pontiac, MI (US);
Thomas Gallagher, Lake Orion, MI (US);
Hong Jiang, Rochester Hills, MI (US);
John Suriano, Auburn Hills, MI (US);
Valeo Electrical Systems, Inc., Auburn Hills, MI (US);
Abstract
An apparatus and method for controlling sinusoidal currents in inductive loads during zero-crossing to reduce distortion. The apparatus and method utilizes first and second PWM signals during a single PWM cycle to apply opposite voltage signals to obtain a net desired voltage across the inductive load. The voltage applied to the load is compared with a threshold and, when the applied voltage is greater than the threshold, normal PWM signals are applied to the load, and when the applied voltage is less than the threshold, an adjusted voltage formed of first and second PWM signals is applied to the load.