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. 16, 2012
Filed:
Oct. 06, 2009
Neil N. Norell, Endicott, NY (US);
James M. Robitaille, Montoursville, PA (US);
Matthew L. Huff, Williamsport, PA (US);
Neil N. Norell, Endicott, NY (US);
James M. Robitaille, Montoursville, PA (US);
Matthew L. Huff, Williamsport, PA (US);
Shop Vac Corporation, Williamsport, PA (US);
Abstract
Disclosed is a system and method for controlling current in a switched reluctance motor by changing a dwell state including starting the motor in a normal mode, measuring current in the motor, comparing the measured current to a first threshold, triggering an interrupt if the measured current exceeds the first threshold, keeping a count of consecutive readings exceeding the first threshold, changing the dwell state from a first state to a second state if the measured current exceeds the first threshold and the count equals a set value, changing the dwell state from a second state to a third state if the measured current exceeds a second threshold, and triggering a fault condition if the measured current in the third state exceeds a third threshold.