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:
Oct. 04, 2005
Filed:
Oct. 10, 2003
Mark Peter Krefta, Murrysville, PA (US);
David Jonathan Hall, Pittsburgh, PA (US);
Kenneth Martin Eichler, Murrysville, PA (US);
Jiing-liang Wu, Murrysville, PA (US);
Robert E. Strickler, Pittsburgh, PA (US);
Michael Barnaby Brennen, Pittsburgh, PA (US);
Mark Peter Krefta, Murrysville, PA (US);
David Jonathan Hall, Pittsburgh, PA (US);
Kenneth Martin Eichler, Murrysville, PA (US);
Jiing-Liang Wu, Murrysville, PA (US);
Robert E. Strickler, Pittsburgh, PA (US);
Michael Barnaby Brennen, Pittsburgh, PA (US);
Curtiss-Wright Electro-Mechanical Corporation, Cheswick, PA (US);
Abstract
A control system for a linear motor adapted to accurately supply a moving window of power to the stator coils. A plurality of individually switched stator coils run the length of a linear motor to move a rotor down the long axis of the stator. Accurate inductive-based position sensors continuously provide position data for the moving rotor. A processing unit calculates a proper time delay from a source voltage peak in order to apply power to the next stator coil in the moving direction of the rotor such that no DC offshoot/undershoot occurs. The linear motor control system optionally includes a failure prevention switching scheme in which pairs of individual stator coils on opposite sides of a double-sided stator are switched together.