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:
Aug. 16, 2016
Filed:
Sep. 30, 2014
Caterpillar Inc., Peoria, IL (US);
Krishnakumar Ramamoorthy, Peoria, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
An electrical induction motor may include nine terminals configured to receive nine current inputs from nine output phases of a nine phase inverter. The motor may include nine windings connected to the nine terminals, and a plurality of contactors, wherein each of the plurality of contactors may be selectively opened or closed in a circuit including the nine windings to selectively connect the windings together in one of a mesh configuration or a star configuration. Each of the windings may be selectively connected between two of the nine current inputs, with a phase angle difference between the two current inputs of 40 degrees. Each of the contactors may be selectively opened or closed to establish a span value for the mesh configuration of two, with two being the number of inverter output phases between a terminal of one of the nine windings and a terminal of another of the nine windings connected to the one of the nine windings. The motor may selectively receive a first one of the harmonics of a drive waveform generated by the nine phase inverter and a second, different one of the harmonics of the drive waveform generated by the nine phase inverter.