Abstract: A rotary electric machine may include a motor portion and an inverter portion. The motor portion may include a stator, a plurality of coils, circumferentially disposed around the stator and connected to form a plurality of galvanic isolated winding sections each having a subset of the coils connected in a multi-phase configuration and each of which may be provided with a coil terminal, and a rotor with a number of pole pairs rotatably disposed against a stator magnetic field generated by currents in the coils. The inverter portion may include a plurality of power switching elements connected to form a number of half bridge legs, and further comprising a high side power switching element, a low side power switching element in each half bridge leg, and an output connector at each half bridge leg. The number of half bridge legs may be equal to a number of isolated winding sections multiplied by a number of phases of the multi-phase configuration.

Abstract: A rotor stack of an electric motor may include a gap for insertion of at least two permanent magnets of an individual magnet pole. The gap may include a central connecting element and at least two side connecting elements, which mechanically connect an inner part and an outer part of the rotor stack, so that the at least two side connecting elements define an air barrier having a form of a polygon. The air barrier in an outer corner of the gap may extend to at least two side of a respective one of the at least two permanent magnets. According to an implementation, the respective permanent magnets may be configured as a cuboid.

Abstract: A rotor stack of an electric motor may include a gap for insertion of at least two permanent magnets of an individual magnet pole. The gap may include a central connecting element and at least two side connecting elements, which mechanically connect an inner part and an outer part of the rotor stack, so that the at least two side connecting elements define an air barrier having a form of a polygon. The air barrier in an outer corner of the gap may extend to at least two side of a respective one of the at least two permanent magnets. According to an implementation, the respective permanent magnets may be configured as a cuboid.