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:
Dec. 27, 2005
Filed:
Nov. 27, 2002
Howard Keith Kidd, Christiansburg, VA (US);
Howard Keith Kidd, Christiansburg, VA (US);
Aspen Motion Technologies, Inc., Radford, VA (US);
Abstract
A method for controlling a motor () driving a pump () using a microcomputer () includes repeatedly sampling a parameter representative of motor torque over one cycle of operation of the pump (), determining at least one point of maximum motor torque during said one cycle of operation of the pump (FIG.); applying speed commands to the motor () from a table of stored speed values in memory (), said values being selected to provide relatively greater speed commands at points of lower motor torque and relatively lesser speed commands at points of higher pump pressure corresponding to higher motor torque, while maintaining at least a base speed command to prevent stalling; and synchronizing the first value in the table of stored values to the point of maximum motor torque.