A hybrid induction motor includes a fixed stator, an independently rotating outer rotor, and an inner rotor fixed to a motor shaft. The outer rotor is designed to have a low moment of inertia and includes angularly spaced apart first bars and permanent magnets on an inner surface of the outer rotor. The inner rotor includes angularly spaced apart second bars and interior flux barriers aligned with the second bars. The outer rotor is initially accelerated by cooperation of a rotating stator magnetic field with the first bars. As the outer rotor accelerates towards synchronous RPM, a rotating magnetic field of the permanent magnets cooperate with the second bars of the inner rotor to accelerate the inner rotor. At near synchronous speed the rotating stator magnetic field reaches through the outer rotor and into the inner rotor coupling the two rotors for efficient permanent magnet operation.

A hybrid induction motor includes a fixed stator, an independently rotating outer rotor, and an inner rotor fixed to a motor shaft. The outer rotor is designed to have a low moment of inertia and includes angularly spaced apart first bars and permanent magnets on an inner surface of the outer rotor. The inner rotor includes angularly spaced apart second bars and interior flux barriers aligned with the second bars. The outer rotor is initially accelerated by cooperation of a rotating stator magnetic field with the first bars. As the outer rotor accelerates towards synchronous RPM, a rotating magnetic field of the permanent magnets cooperate with the second bars of the inner rotor to accelerate the inner rotor. At near synchronous speed the rotating stator magnetic field reaches through the outer rotor and into the inner rotor coupling the two rotors for efficient permanent magnet operation.

A doubly fed brushless induction starter generator includes a stator and a rotor, which are separated by an air gap. The stator includes stator winding slots, each of which includes a first layer of power windings, a second layer of power windings, and a third layer of control windings, which include 2-pole single-phase windings. The control windings are arranged in the stator winding slots between the air gap and the first and second layers of power windings. Direct current is delivered to control windings in the generator as an excitation current to thereby produce a magnetic flux, through which the stator is moved to produce and alternating current in the power windings as an output current. The output current can be delivered to an electrical load, such as an electrical component on an aircraft.

A synchronous reluctance type rotary electric machine of an embodiment includes a shaft, a rotor core, rotor core pressers, a plurality of conductor bars, and short-circuit rings. The shaft rotates around a rotation axis. The rotor core is fixed to the shaft and includes multi-layered hollow parts having a convex shape toward a radially inward side formed for each pole in cross section. The rotor core pressers hold the rotor core by pressing the rotor core from both sides in a rotation axis direction. The plurality of conductor bars are disposed in the hollow parts to extend along the rotation axis and have both ends protruding through the rotor core pressers. The short-circuit rings are provided at both ends of each of the plurality of conductor bars and connect the plurality of conductor bars together. Thus, the conductor bars are fixed to the rotor core pressers.

A synchronous reluctance type rotary electric machine of an embodiment includes a shaft, a rotor core, rotor core pressers, a plurality of conductor bars, and short-circuit rings. The shaft rotates around a rotation axis. The rotor core is fixed to the shaft and includes multi-layered hollow parts having a convex shape toward a radially inward side formed for each pole in cross section. The rotor core pressers hold the rotor core by pressing the rotor core from both sides in a rotation axis direction. The plurality of conductor bars are disposed in the hollow parts to extend along the rotation axis and have both ends protruding through the rotor core pressers. The short-circuit rings are provided at both ends of each of the plurality of conductor bars and connect the plurality of conductor bars together. Thus, the conductor bars are fixed to the rotor core pressers.

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 hybrid induction motor includes a fixed stator, an independently rotating outer rotor, and an inner rotor fixed to a motor shaft. The outer rotor is designed to have a low moment of inertia and includes angularly spaced apart first bars and permanent magnets on an inner surface of the outer rotor. The inner rotor includes angularly spaced apart second bars and interior flux barriers aligned with the second bars. The outer rotor is initially accelerated by cooperation of a rotating stator magnetic field with the first bars. As the outer rotor accelerates towards synchronous RPM, a rotating magnetic field of the permanent magnets cooperate with the second bars of the inner rotor to accelerate the inner rotor. At near synchronous speed the rotating stator magnetic field reaches through the outer rotor and into the inner rotor coupling the two rotors for efficient permanent magnet operation.

A hybrid induction motor includes a fixed stator, an independently rotating outer rotor, and an inner rotor fixed to a motor shaft. The outer rotor is designed to have a low moment of inertia and includes angularly spaced apart first bars and permanent magnets on an inner surface of the outer rotor. The inner rotor includes angularly spaced apart second bars and interior flux barriers aligned with the second bars. The outer rotor is initially accelerated by cooperation of a rotating stator magnetic field with the first bars. As the outer rotor accelerates towards synchronous RPM, a rotating magnetic field of the permanent magnets cooperate with the second bars of the inner rotor to accelerate the inner rotor. At near synchronous speed the rotating stator magnetic field reaches through the outer rotor and into the inner rotor coupling the two rotors for efficient permanent magnet operation.

A driving motor includes a rotor body that is rotatably installed inside a stator with a predetermined void therebetween and has a rotor coil wound on multiple rotator teeth. The rotor body includes: i) multiple wedges inserted between the rotor teeth of the rotor body in an axial direction and supporting the rotor coil; and ii) end coil covers mounted on both axial ends of the rotor body, respectively and connected with the wedge members. Each wedge member includes a wedge body disposed between the rotor teeth in the axial direction and connected with the end coil covers. Each wedge body is made of a metallic material having a conductivity and has an insulating layer formed on an outer surface other than both cross sections connected to the end coil covers. The end coil covers are also made of a metallic material having a conductivity and are connected with the ends of each wedge body.

A driving motor includes a rotor body that is rotatably installed inside a stator with a predetermined void therebetween and has a rotor coil wound on multiple rotator teeth. The rotor body includes: i) multiple wedges inserted between the rotor teeth of the rotor body in an axial direction and supporting the rotor coil; and ii) end coil covers mounted on both axial ends of the rotor body, respectively and connected with the wedge members. Each wedge member includes a wedge body disposed between the rotor teeth in the axial direction and connected with the end coil covers. Each wedge body is made of a metallic material having a conductivity and has an insulating layer formed on an outer surface other than both cross sections connected to the end coil covers. The end coil covers are also made of a metallic material having a conductivity and are connected with the ends of each wedge body.