A rotor for an LSIPM comprises a plurality of permanent magnets defining a number of poles (P) of the LSIPM, and a plurality of rotor bars spaced about the rotor defining a rotor bar area (BA). The rotor bars are formed of a conductive material having an associated conductivity (?.sub.RB). End members are disposed on axial opposite ends of the rotor core. The end members are in electrical contact with the rotor bars. The end members are formed from a material having an associated conductivity (?.sub.EM). Each end ring member has a minimum geometric cross sectional area (ERA) and outer diameter that generally corresponds to the rotor core outer diameter. The ERA is greater than 0.5 times the rotor bar area per the number of poles (BA/P) times a ratio of the rotor bar material conductivity to the end member material conductivity (?.sub.RB/?.sub.EM).

A rotor for an LSIPM comprises a plurality of permanent magnets defining a number of poles (P) of the LSIPM, and a plurality of rotor bars spaced about the rotor defining a rotor bar area (BA). The rotor bars are formed of a conductive material having an associated conductivity (?.sub.RB). End members are disposed on axial opposite ends of the rotor core. The end members are in electrical contact with the rotor bars. The end members are formed from a material having an associated conductivity (?.sub.EM). Each end ring member has a minimum geometric cross sectional area (ERA) and outer diameter that generally corresponds to the rotor core outer diameter. The ERA is greater than 0.5 times the rotor bar area per the number of poles (BA/P) times a ratio of the rotor bar material conductivity to the end member material conductivity (?.sub.RB/?.sub.EM).

A rotor for an interior permanent magnet machine (IPM), comprising a rotor core having a plurality of magnetically conductive laminations stacked in a rotor axial direction. The magnetically conductive laminations comprise cut-out portions forming a plurality of flux barriers (FB) radially alternated by flux paths (FP), at least a first part of the flux barriers (FB) housing permanent magnets, at least a second part of the flux barriers (FB) being filled with an electrically conductive and magnetically non-conductive material creating a cage inside the rotor core. The rotor further includes a first and a second short circuit ring positioned at the opposite ends of the rotor core, the first short circuit ring being different from the second short circuit ring.

A synchronous reluctance motor includes a rotor having a rotor iron core and a stator having pole teeth. The rotor iron core defines multiple magnetic poles. A magnetic barrier area is defined between adjacent magnetic poles in a circumferential direction, and a conductor area is located at a radially outer side of the magnetic barrier area. The magnetic barrier area is provided with a hole arranged in multiple layers in a radial direction and defining a magnetic barrier. The conductor area is provided with multiple conductors arranged at substantially equal intervals in the circumferential direction and having substantially identical cross-sectional shapes as each other. The following relationship is satisfied: Nc={2?[Nt/(2?Np)?1]?1}?Np where Nt is a number of the pole teeth, Np is a number of the magnetic poles, and Nc is a number of the conductors.

A synchronous reluctance motor includes a rotor having a rotor iron core and a stator having pole teeth. The rotor iron core defines multiple magnetic poles. A magnetic barrier area is defined between adjacent magnetic poles in a circumferential direction, and a conductor area is located at a radially outer side of the magnetic barrier area. The magnetic barrier area is provided with a hole arranged in multiple layers in a radial direction and defining a magnetic barrier. The conductor area is provided with multiple conductors arranged at substantially equal intervals in the circumferential direction and having substantially identical cross-sectional shapes as each other. The following relationship is satisfied: Nc={2?[Nt/(2?Np)?1]?1}?Np where Nt is a number of the pole teeth, Np is a number of the magnetic poles, and Nc is a number of the conductors.

Embodiments herein relate to a permanent magnet (PM) dynamoelectric machine. The machine includes a drive shaft, a stator assembly having a ferromagnetic stator core, a plurality stator teeth mounted to the stator core with distal ends proximate the inner radial periphery of the stator assembly and a plurality of stator coils mounted between the stator teeth, and a PM rotor assembly with multiple PMs, a ferromagnetic rotor core, a plurality of ferromagnetic rotor teeth mounted to the rotor core with distal ends proximate an inner periphery of the stator assembly separated by an air gap, and at least one control coil, the at least one control coil wrapped about a saturable region of each the rotor teeth. Each saturable region of the rotor teeth is operable to divert air gap magnetic flux (g) generated by the PMs across the air gap through the distal ends of the rotor teeth.

A rotor for an LSIPM comprises a plurality of permanent magnets defining a number of poles (P) of the LSIPM, and a plurality of rotor bars spaced about the rotor defining a rotor bar area (BA). The rotor bars are formed of a conductive material having an associated conductivity (?.sub.RB). End members are disposed on axial opposite ends of the rotor core. The end members are in electrical contact with the rotor bars. The end members are formed from a material having an associated conductivity (?.sub.EM). Each end ring member has a minimum geometric cross sectional area (ERA) and outer diameter that generally corresponds to the rotor core outer diameter. The ERA is greater than 0.5 times the rotor bar area per the number of poles (BA/P) times a ratio of the rotor bar material conductivity to the end member material conductivity (?.sub.RB/?.sub.EM).

A rotor for an LSIPM comprises a plurality of permanent magnets defining a number of poles (P) of the LSIPM, and a plurality of rotor bars spaced about the rotor defining a rotor bar area (BA). The rotor bars are formed of a conductive material having an associated conductivity (?.sub.RB). End members are disposed on axial opposite ends of the rotor core. The end members are in electrical contact with the rotor bars. The end members are formed from a material having an associated conductivity (?.sub.EM). Each end ring member has a minimum geometric cross sectional area (ERA) and outer diameter that generally corresponds to the rotor core outer diameter. The ERA is greater than 0.5 times the rotor bar area per the number of poles (BA/P) times a ratio of the rotor bar material conductivity to the end member material conductivity (?.sub.RB/?.sub.EM).

The high efficiency motor employing the principle of three phase induction motor and permanent magnet synchronous motor includes a stator assembly and a rotor assembly. The rotor assembly includes a rotor shaft, a rotor stack assembly, a rotor cover and end ring. The rotor stack assembly includes a stamping stack, a conductor bar and a magnet. The stamping stack has dedicated slots for the conductor bar and the magnet. The rotor cover is fitted on the rotor stack, wherein both axial ends of the rotor cover are closed by end rings.

The high efficiency motor employing the principle of three phase induction motor and permanent magnet synchronous motor includes a stator assembly and a rotor assembly. The rotor assembly includes a rotor shaft, a rotor stack assembly, a rotor cover and end ring. The rotor stack assembly includes a stamping stack, a conductor bar and a magnet. The stamping stack has dedicated slots for the conductor bar and the magnet. The rotor cover is fitted on the rotor stack, wherein both axial ends of the rotor cover are closed by end rings.