A repaired rotor of a multi-phase electric motor includes a plurality of annular laminations stacked to form a cylindrical core about a central axis, each of the laminations having notches aligned to form axially extending slots about a periphery of the core; a plurality of electrical conductors extending through the slots; a pair of conductive end rings, each attached to a different end of the cylindrical core and electrically connected to the plurality of electrical conductors; and an outer end ring abutting and electrically connected to one of the pair of conductive end rings and electrically connected to adjacent ends of the plurality of electrical conductors, the outer end ring providing an uninterrupted electrically conductive path connecting the plurality of electrical conductors.

The present invention discloses an alternating current (AC) permanent magnet motor, including a stator, a rotor, and a controller. Cable troughs and some same coil windings exist on a silicon steel sheet of a stator core. Grooves exist on the stator core, and stator permanent magnets are mounted in the grooves. The groove includes two types of grooves, namely, open grooves and enclosed grooves, and the two types of grooves are alternately laminated to form the stator core. A coil unit of the stator includes stator permanent magnets mounted in grooves of two stator cores and four same coils, and some same coil units form a three-phase stator coil. The rotor includes rotor cores, enclosed squirrel cages and rotor permanent magnets. The controller outputs a three-phase power source having a same positive and negative half sine-wave or step-wave pulse.

The present invention discloses an alternating current (AC) permanent magnet motor, including a stator, a rotor, and a controller. Cable troughs and some same coil windings exist on a silicon steel sheet of a stator core. Grooves exist on the stator core, and stator permanent magnets are mounted in the grooves. The groove includes two types of grooves, namely, open grooves and enclosed grooves, and the two types of grooves are alternately laminated to form the stator core. A coil unit of the stator includes stator permanent magnets mounted in grooves of two stator cores and four same coils, and some same coil units form a three-phase stator coil. The rotor includes rotor cores, enclosed squirrel cages and rotor permanent magnets. The controller outputs a three-phase power source having a same positive and negative half sine-wave or step-wave pulse.

A magnetically active unit of an electric machine with at least two poles includes a laminated core with slots, and at least one winding for each of the phases. The windings have an electric conductor which forms coil groups in the slots. The coils of the coil groups are formed with at least two sections of the electric conductors of at least one of the windings and are arranged so as to be electrically insulated from each other in the grooves. At least one first coil group of the coil groups of one of the windings has a first number of coils which deviates from a second number of coils of a second coil group of the coil groups of the same winding.

A magnetically active unit of an electric machine with at least two poles includes a laminated core with slots, and at least one winding for each of the phases. The windings have an electric conductor which forms coil groups in the slots. The coils of the coil groups are formed with at least two sections of the electric conductors of at least one of the windings and are arranged so as to be electrically insulated from each other in the grooves. At least one first coil group of the coil groups of one of the windings has a first number of coils which deviates from a second number of coils of a second coil group of the coil groups of the same winding.

An axial flux induction machine including at least two stator and one rotor where the stators include an inner and outer ring of coils. The stator includes at least two mirrored structure constructed such as to secure wire coils, amplify magnetic characteristics, and provide a structure upon which to secure a rotary shaft or through which a rotary shaft may be run. The structures supporting either the outer or inner ring of coils can be in contact between the two stators and the outer ring can be spaced further from the rotary shaft than the inner ring of coils and also further from the rotary shaft than an outer edge of the rotor.

An axial flux induction machine including at least two stator and one rotor where the stators include an inner and outer ring of coils. The stator includes at least two mirrored structure constructed such as to secure wire coils, amplify magnetic characteristics, and provide a structure upon which to secure a rotary shaft or through which a rotary shaft may be run. The structures supporting either the outer or inner ring of coils can be in contact between the two stators and the outer ring can be spaced further from the rotary shaft than the inner ring of coils and also further from the rotary shaft than an outer edge of the rotor.

An electric machine has a multiplicity of windings having a first terminal and a second terminal. At least one node exists to which one of the two terminals of a respective winding from the multiplicity of windings is electrically connected. The corresponding other terminal of a respective winding from the multiplicity of windings is electrically connected to a phase terminal, and to a modular multilevel converter that has a multiplicity of individual modules that are connected up in series to form a ring. At least one tap can be arranged between two respective adjacent individual modules and provides a phase terminal to which the first or the second terminal of a winding from the multiplicity of windings of the electric machine is electrically connected. A number of taps of the modular multilevel converter corresponds exactly to a number of windings from the multiplicity of windings of the electric machine.

An electric machine has a multiplicity of windings having a first terminal and a second terminal. At least one node exists to which one of the two terminals of a respective winding from the multiplicity of windings is electrically connected. The corresponding other terminal of a respective winding from the multiplicity of windings is electrically connected to a phase terminal, and to a modular multilevel converter that has a multiplicity of individual modules that are connected up in series to form a ring. At least one tap can be arranged between two respective adjacent individual modules and provides a phase terminal to which the first or the second terminal of a winding from the multiplicity of windings of the electric machine is electrically connected. A number of taps of the modular multilevel converter corresponds exactly to a number of windings from the multiplicity of windings of the electric machine.

A stator, a motor and a compressor are provided. The stator includes a stator iron core and a winding. The stator iron core includes: an annular yoke; multiple stator teeth, near ends of the stator teeth being fixedly adjacent to an inner surface of the yoke and projecting inward towards the center of the stator iron core along a radial direction of the yoke, remote ends of the stator teeth that face inward along the radial direction defining a center hole for accommodating a rotor, and the stator teeth being spaced from each other in a circumferential direction; and multiple stator slots, each stator slot being defined between two neighboring stator teeth. The winding is wound around the stator teeth and operable for generating a rotating magnetic field. The yoke has at least two cut edges at an outer periphery thereof, disposed asymmetrically relative to the center.