An electric motor includes: a stator; a shaft; a rotor mounted on the shaft, the rotor having an end ring that is concentric with the shaft; and a flux shield around the shaft inside the end ring.

An electric motor includes: a stator; a shaft; a rotor mounted on the shaft, the rotor having an end ring that is concentric with the shaft; and a flux shield around the shaft inside the end ring.

An electric motor comprises: a rotor having poles equaling a first number; and a stator having slots equaling a second number, the stator having stator windings formed by conductors wound in a wave pattern around the stator, wherein a third number of the conductors are located in each of the slots, wherein the conductors form three balanced parallel paths through the slots, each of the conductors in the three balanced parallel paths undergoing a same number of pitch turns, each of the pitch turns being either a standard pitch turn or a nonstandard pitch turn, the standard pitch turn involving wrapping around slots equaling the second number divided by the first number, the nonstandard pitch turn involving wrapping around more or fewer slots than the standard pitch turn, wherein each of the three balanced parallel paths forms a repeating pattern throughout the slots.

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.

An axial flux induction machine comprises at least two stators and one rotor where the stators include an inner and outer ring of coils. The stator is comprised of two mirrored structures constructed such as to secure wire coils, amplify magnetic characteristics, and provide a structure upon which to secure a rotary shaft. The structures supporting the outer 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 comprises at least two stators and one rotor where the stators include an inner and outer ring of coils. The stator is comprised of two mirrored structures constructed such as to secure wire coils, amplify magnetic characteristics, and provide a structure upon which to secure a rotary shaft. The structures supporting the outer 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.

The invention relates to an electric asynchronous machine (1), in particular an induction machine, comprising: a cylindrical stator (2) with stator teeth (22) on a stator yoke (21), wherein a ratio between a yoke height (hy1) of the stator yoke (21) in the radial direction and a groove height (hn1) of the stator grooves (23) in the radial direction ranges from 1.75 to 2.5; a cylindrical rotor (4) with poles (42) on a rotor yoke which are defined by short-circuit windings in a rotor body (41), wherein a ratio between the yoke height of the rotor body (41) in the radial direction and the groove height of the rotor grooves in the radial direction ranges from 2 to 2.75.

The invention relates to an electric asynchronous machine (1), in particular an induction machine, comprising: a cylindrical stator (2) with stator teeth (22) on a stator yoke (21), wherein a ratio between a yoke height (hy1) of the stator yoke (21) in the radial direction and a groove height (hn1) of the stator grooves (23) in the radial direction ranges from 1.75 to 2.5; a cylindrical rotor (4) with poles (42) on a rotor yoke which are defined by short-circuit windings in a rotor body (41), wherein a ratio between the yoke height of the rotor body (41) in the radial direction and the groove height of the rotor grooves in the radial direction ranges from 2 to 2.75.

The present invention relates to a Robot Electronics Unit (REU) motor controller board (MCB) with a trapezoid wave design, which can utilize power efficiently and reduce electromagnetic interference. The MCB uses a modulator or Buck Converter to regulate the voltage before it is passed to the motors used in robotic arms in space applications. The REU MCB includes: a commutator disposed on the MCB and connected to a three-phase induction motor; and a modulator disposed on the MCB and which precedes the commutator, the modulator which utilizes pulse width modulation (PWM) to regulate a voltage to the commutator and provide a predetermined current to the commutator. The modulator regulates the voltage by stepping it down from a 100V power input signal before the voltage is passed to the motor. The output of the modulator includes a trapezoid waveform design which controls the motor and reduces electromagnetic interference.

The present invention relates to a Robot Electronics Unit (REU) motor controller board (MCB) with a trapezoid wave design, which can utilize power efficiently and reduce electromagnetic interference. The MCB uses a modulator or Buck Converter to regulate the voltage before it is passed to the motors used in robotic arms in space applications. The REU MCB includes: a commutator disposed on the MCB and connected to a three-phase induction motor; and a modulator disposed on the MCB and which precedes the commutator, the modulator which utilizes pulse width modulation (PWM) to regulate a voltage to the commutator and provide a predetermined current to the commutator. The modulator regulates the voltage by stepping it down from a 100V power input signal before the voltage is passed to the motor. The output of the modulator includes a trapezoid waveform design which controls the motor and reduces electromagnetic interference.