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:
Jun. 10, 2003
Filed:
Sep. 21, 2001
Martin Piedl, Blacksburg, VA (US);
Moe K. Barani, Radford, VA (US);
Ron Flanary, Blacksburg, VA (US);
Aspen Motion Technologies, Inc., Radford, VA (US);
Abstract
A method and apparatus for controlling the output function of a permanent magnet brushless DC motor ( ), by sensing an input current to the motor ( ), by computing an output torque generated by the motor ( ) as a function of the input current to the motor ( ), by computing an output pressure for a pump ( ) in response to the output torque, by reading a set point pressure, and by comparing the set point pressure to the output pressure, and in response thereto controlling on-off operation of the motor ( ). The apparatus includes a sensing circuit ( ) and a microelectronic processor ( ) for performing these functions.