A rotary electrical machine comprises: a mechanical motor/generator assembly, and optional electronics. The mechanical motor/generator assembly comprises: a core assembly, and an armature assembly. The core assembly comprises two magnet assemblies, which are positioned to define an air gap therebetween and produce time invariant magnetic fields in the air gap. The armature assembly comprises: an armature, and one or more conductors that are mounted to the armature and positioned in the air gap. Either the core assembly or the armature assembly may be mounted to a rotating element, while the other is mounted to a stationary element. During operation as a motor, electrical current flows in alternating directions in the one or more conductors, to produce torque on the armature and rotating element. During operation as a generator, electrical current is produced in the one or more conductors when torque is applied to the rotating element and the armature.

A rotary electrical machine comprises: a mechanical motor/generator assembly, and optional electronics. The mechanical motor/generator assembly comprises: a core assembly, and an armature assembly. The core assembly comprises two magnet assemblies, which are positioned to define an air gap therebetween and produce time invariant magnetic fields in the air gap. The armature assembly comprises: an armature, and one or more conductors that are mounted to the armature and positioned in the air gap. Either the core assembly or the armature assembly may be mounted to a rotating element, while the other is mounted to a stationary element. During operation as a motor, electrical current flows in alternating directions in the one or more conductors, to produce torque on the armature and rotating element. During operation as a generator, electrical current is produced in the one or more conductors when torque is applied to the rotating element and the armature.

A generator device for generating electrical current on the basis of a magnetic interaction between a rotating permanent magnet and rotatable further permanent magnets.

A generator device for generating electrical current on the basis of a magnetic interaction between a rotating permanent magnet and rotatable further permanent magnets.

Disclosed herein is a rotor for a wound-rotor motor. The rotor for a wound-rotor motor includes: a rotor core including a hollow formed in a central portion thereof and coupled to a shaft; a teeth portion radially formed on an outer side surface of the rotor; and a pole shoe formed to extend from an end portion of the teeth portion in one direction and including a part of a cross section of an outer side surface formed in an arc shape of a first imaginary circle (C1) having a first radius (r1) which is a distance from a central point (CP1) of the hollow to an outermost position (P1) thereof.

Disclosed herein is a rotor for a wound-rotor motor. The rotor for a wound-rotor motor includes: a rotor core including a hollow formed in a central portion thereof and coupled to a shaft; a teeth portion radially formed on an outer side surface of the rotor; and a pole shoe formed to extend from an end portion of the teeth portion in one direction and including a part of a cross section of an outer side surface formed in an arc shape of a first imaginary circle (C1) having a first radius (r1) which is a distance from a central point (CP1) of the hollow to an outermost position (P1) thereof.

Provided is a method for implementing skewing in a hybrid homopolar generator comprising. The method includes aligning inductor poles within an axial front segment of a rotor, with corresponding magnets within an axial back segment of the rotor. The method also includes moving, during assembly, the axial front segment and the axial back segment relative to each other such that inductor poles in the axial front segment and the axial back segment form a pattern.

There is provided an electric machine that includes a rotor comprising a pole and magnet assemblies divided axially in a first subsection and a second subsection. Each of the first and second subsections includes poles and magnets, and the poles and magnets of the first subsection are offset from the poles and magnets of the second subsection.

A drive system (1) having a unipolar machine (2) and a fuel cell (3) for supplying the unipolar machine (2) with electrical energy. The fuel cell (3) can be arranged in a ring shape around a rotor shaft (5) of a rotor (4) of the unipolar machine (2). The unipolar machine (2) can be provided in a motor vehicle (600) to supply a traction torque.

Disclosed herein are a motor safety control method that can efficiently detect an abnormality of a motor sensor configured to sense a rotational motion of a motor and control a safety operation of the motor based thereon, and a robot for implementing the method. The motor safety control method for a robot may include receiving a first motor value from a high-resolution sensor of a motor, receiving a second motor value from a low-resolution sensor of the motor, and comparing a threshold with a difference between the first motor value and the second motor value, and transmitting an operation signal to a motor driver for the motor to continue or stop operation of the motor.