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AssigneeEaton Corporation
InventorsJames J. Kinsella, Peter J. Unsworth, Xin Zhou, Christopher J. Wieloch, Michael T. Little
Estimating the term…
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.
A method of controlling operation of an electric device comprising the steps of:
A controller to control operation of an electric power system, the controller programmed to:
A system to control operation of a polyphase electric motor, the system comprising:
Dependencies are inferred from the claim text.