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:
Jul. 24, 2012
Filed:
Jul. 15, 2009
Gregory A. Peterson, South Barrington, IL (US);
Michael P. Sullivan, Algonquin, IL (US);
Donald E. Morgan, Florissant, MO (US);
Bret S. Clark, Oakville, MO (US);
Gregory A. Peterson, South Barrington, IL (US);
Michael P. Sullivan, Algonquin, IL (US);
Donald E. Morgan, Florissant, MO (US);
Bret S. Clark, Oakville, MO (US);
Nidec Motor Corporation, St. Louis, MO (US);
Abstract
A motor drive for an electric motor of a variable fluid circulating system includes a processing module and a power module. The processing module receives a signal profile and generates a control signal based on the signal profile. A power module generates a carrier signal based on the control signal and a direct current (DC) voltage. The power module pulse width modulates the carrier signal to generate a drive signal in the electric motor that matches the signal profile. The power module powers the electric motor based on the drive signal to adjust injection of a fluid into a reservoir.