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:
May. 29, 2007
Filed:
Jun. 02, 2004
James J. Kinsella, Pleasant View, TN (US);
Peter J. Unsworth, Lewes, GB;
Xin Zhou, Brookfield, WI (US);
Christopher J. Wieloch, Brookfield, WI (US);
Michael T. Little, Milwaukee, WI (US);
James J. Kinsella, Pleasant View, TN (US);
Peter J. Unsworth, Lewes, GB;
Xin Zhou, Brookfield, WI (US);
Christopher J. Wieloch, Brookfield, WI (US);
Michael T. Little, Milwaukee, WI (US);
Eaton Corporation, Cleveland, OH (US);
Abstract
Control of an induction motor is carried out to limit damaging arcing stress and mechanical stresses placed on the control contactor assembly and the induction motor resulting from the simultaneous or synchronous breaking and making of contactors employed to connect the windings of the motor to a power supply. Asynchronously connecting the windings to the power supply via the asynchronous or non-simultaneous closing of the contactors of a modular contactor assembly reduces the potentially damaging transient current, the associated torque oscillations, and mechanical stresses. The present invention is particularly applicable to delta motors that are started with its windings in a star or wye configuration followed by the reconnection of the windings in a delta configuration when the motor is at normal running speed.