In a compressor for refrigerant having a suction inlet for refrigerant and a pressure outlet for compressed refrigerant, said compressor comprising a compression unit and an electric motor driving said compression unit, said electric motor being a synchronous reluctance motor having a stator and a rotor, said rotor comprising a plurality of stacked disc elements, each disc element having a plurality of flux barriers configured to give the rotor core an anisotropic magnetic structure and formed as apertures in said disc element, it is provided that said flux barriers are arranged in said rotor core to define channels enabling a flow of refrigerant through said rotor core, said rotor is provided with a first support element acting on a first front side of said rotor core and a second support element acting on a second front side of said rotor core, said support elements being provided with cut-out sections and said cut-out sections being designed to uncover at least 70% of the cross section of apertures defined by said flux barriers in the respective disc element forming the respective front side of said rotor core.

A rotor for a reluctance machine is provided. The rotor includes a soft magnetic element which is cylindrical in shape. The soft magnetic element has recesses forming flux barriers. At least part of the recesses are filled with an electrically conducting and magnetically non-conducting filler material such that a starting cage is formed in a peripheral region of the rotor. The ratio of the surface of the filled region of the flux barriers to the surface of the region of the unfilled flux barriers is at least 0.2 for at least one rotor cycle.

A rotor for a reluctance machine is provided. The rotor includes a soft magnetic element which is cylindrical in shape. The soft magnetic element has recesses forming flux barriers. At least part of the recesses are filled with an electrically conducting and magnetically non-conducting filler material such that a starting cage is formed in a peripheral region of the rotor. The ratio of the surface of the filled region of the flux barriers to the surface of the region of the unfilled flux barriers is at least 0.2 for at least one rotor cycle.

The present disclosure provides a rotor structure, a permanent magnet assisted synchronous reluctance motor and an electric car. The rotor structure includes: a rotor body opened with a group of permanent magnet slots, wherein the group of permanent magnet slots include an inner-layer permanent magnet slot and an outer-layer permanent magnet slot which are arranged at intervals outwards along a radial direction of the rotor body; an inner-layer permanent magnet disposed within the inner-layer permanent magnet slot; an outer-layer permanent magnet disposed within the outer-layer permanent magnet slot, wherein the inner-layer permanent magnet and the outer-layer permanent magnet are arranged staggeredly.

The present disclosure provides a rotor structure, a permanent magnet assisted synchronous reluctance motor and an electric car. The rotor structure includes: a rotor body opened with a group of permanent magnet slots, wherein the group of permanent magnet slots include an inner-layer permanent magnet slot and an outer-layer permanent magnet slot which are arranged at intervals outwards along a radial direction of the rotor body; an inner-layer permanent magnet disposed within the inner-layer permanent magnet slot; an outer-layer permanent magnet disposed within the outer-layer permanent magnet slot, wherein the inner-layer permanent magnet and the outer-layer permanent magnet are arranged staggeredly.

The present disclosure provides a rotor structure of a motor including: a plurality of rotor cores disposed in predetermined directions at a rotating member; a plurality of coils wound around each of the rotor cores; and a crossover portion which is formed at a predetermined region of the rotating member and through which one of the coils wound around one of the rotor cores is passed to another rotor core. The crossover portion may include an inner partition wall, intermediate partition walls and an outer partition wall which are formed at a predetermined distance from each other from the rotation center of the rotating member to the rotor cores, a first groove may be formed between the inner partition wall and the intermediate partition wall, a second groove may be formed between the intermediate partition wall and the outer partition wall, and the second groove may have a larger depth than the first groove.

An enclosed-ventilated electrically excited synchronous machine includes a shaft and a rotor which is non-rotatably positioned on the shaft. The rotor includes a plurality of pole bodies which project radially outwards. The pole bodies have each an exciter coil and form in their entirety a rotor winding, with each pole body having an end face formed with a coil winding head. A protective element is provided on the coil winding head to protect the coil winding head against abrasion.

An enclosed-ventilated electrically excited synchronous machine includes a shaft and a rotor which is non-rotatably positioned on the shaft. The rotor includes a plurality of pole bodies which project radially outwards. The pole bodies have each an exciter coil and form in their entirety a rotor winding, with each pole body having an end face formed with a coil winding head. A protective element is provided on the coil winding head to protect the coil winding head against abrasion.

A 3D printed metal coil for an electrical machine. The 3D printed coil has a plurality of turns and is configured to fit within a slot in an electrical machine. A portion of each turn forming an end winding of the coil has a flat plate-like shape for dissipating heat from the end winding.

A 3D printed metal coil for an electrical machine. The 3D printed coil has a plurality of turns and is configured to fit within a slot in an electrical machine. A portion of each turn forming an end winding of the coil has a flat plate-like shape for dissipating heat from the end winding.