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:
Sep. 27, 2005
Filed:
Aug. 21, 2003
Charles R. Dejohn, Rochester, NY (US);
Charles R. DeJohn, Rochester, NY (US);
Delphi Technologies, Inc., Troy, MI (US);
Abstract
An apparatus including a stepper motor for actuating a moveable element of the apparatus. The maximum torque that can be generated at each step is a function of the voltage supplied to the motor. In some applications, however, torque greater than the nominal maximum may be required for brief periods. Under such conditions, the need for greater torque is sensed and a controller supplies a higher voltage to the motor, thereby increasing temporarily the output torque. When increased torque is no longer required, the voltage is reduced to nominal. The invention is useful, for example, for extending the range of a stepper motor actuator for an intake air control valve in a fuel cell assembly.