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:
Apr. 07, 2015
Filed:
Nov. 10, 2011
Matheus A. Bevilaqua, Joinville, BR;
Luiz V. Dokonal, Joinville, BR;
Evandro J. Meurer, Joinville, BR;
Fernando P. Silva, Joinville, BR;
Marcelo C. Silva, Joinville, BR;
Rodrigo S. Teixeira, Joinville, BR;
Matheus A. Bevilaqua, Joinville, BR;
Luiz V. Dokonal, Joinville, BR;
Evandro J. Meurer, Joinville, BR;
Fernando P. Silva, Joinville, BR;
Marcelo C. Silva, Joinville, BR;
Rodrigo S. Teixeira, Joinville, BR;
Whirlpool Corporation, Benton Harbor, MI (US);
Abstract
According to one illustrative embodiment, a washing machine comprises a motor including a plurality of coils and one or more permanent magnets, an inverter configured to supply current to the plurality of coils and to measure a back electromotive force (BEMF) waveform from the plurality of coils, and an electronic control unit (ECU) configured to (i) integrate the BEMF waveform to generate an integrated BEMF waveform, (ii) determine a magnetic flux of the one or more permanent magnets using an amplitude of the integrated BEMF waveform, and (iii) control the current supplied by the inverter based at least in part upon the determined magnetic flux.