Arrangement for electric power conversion and electric drive

A first system comprising:

• a second system comprising:
• a power converter comprising three first legs;
• an electric motor comprising three open-end stator windings, wherein each of the three open-end stator windings comprises a first end and a second end, wherein first ends of the three open-end stator windings are coupled to respective first legs of the three first legs, and wherein second ends of the three-open end stator windings are coupled together and have a same electric potential;
• and
• a power switch configured to selectively disconnect one of the second ends from all other of the second ends to establish at most two distinct electric potentials;
• a power grid interface coupled to the electric motor and comprising second legs coupled to at most two distinct electric potentials;
• an energy storage interface coupled to the power converter;
• and
• an energy storage configured to couple to the energy storage interface.

A method of operating a system for electric power conversion and electric drive, wherein the method comprises:

• connecting first ends of stator windings to respective first legs of three first legs of a power converter, wherein the system comprises the power converter and an electric motor, wherein the electric motor comprises the stator windings;
• connecting a third leg of the power converter to an inductor of the system;
• selectively disconnecting one of second ends of the stator windings from all other of the second ends to establish at most two distinct electric potentials;
• and
• coupling the at most two distinct electric potentials to respective second legs of a power grid interface to the system.