A motor/generator/transmission system includes: an axle; a stator ring having a plurality of stator coils disposed around the periphery of the stator ring, wherein each phase of the plurality of stator coils includes a respective set of multiple parallel non-twisted wires separated at the center tap with electronic switches for connecting the parallel non-twisted wires of each phase of the stator coils all in series, all in parallel, or in a combination of series and parallel; a rotor support structure coupled to the axle; a first rotor ring and a second rotor ring each having an axis of rotation coincident with the axis of rotation of the axle, at least one of the first rotor ring or the second rotor ring being slidably coupled to the rotor support structure and configured to translate along the rotor support structure in a first axial direction or in a second axial direction.

A rotating electric machine includes a non-rotating member, a stator fixed to the non-rotating member, a field coil fixed to the non-rotating member, disposed on an inner diameter side of the stator, and having an iron core and a winding wound around the iron core, and a rotor rotatably disposed between the stator and the field coil. The rotor includes a first rotor portion and a second rotor portion. The rotating electric machine further comprises a positioning member disposed in each of the first gap, the second gap, and the third gap to position each of the first rotor portion and the second rotor portion in the circumferential direction and the extending direction.

A method for manufacturing a rotor assembly for an electrical machine includes printing a first part of a rotor shaft. The method also includes printing a rotor core onto the first part of the rotor shaft. In addition, the method includes printing a second part of the rotor shaft onto the rotor core; printing a first part of the rotor winding. The method also includes coupling the first part of the rotor winding to the rotor core. After coupling the first part of the rotor winding to the rotor core, the method includes printing a second part of the rotor winding onto the first part of the rotor winding to form the rotor assembly.

A method for manufacturing a rotor assembly for an electrical machine includes printing a first part of a rotor shaft. The method also includes printing a rotor core onto the first part of the rotor shaft. In addition, the method includes printing a second part of the rotor shaft onto the rotor core; printing a first part of the rotor winding. The method also includes coupling the first part of the rotor winding to the rotor core. After coupling the first part of the rotor winding to the rotor core, the method includes printing a second part of the rotor winding onto the first part of the rotor winding to form the rotor assembly.

A core for an electric machine includes a core body arranged along a rotation axis and a winding. The core body has two or more teeth including a first tooth and a second tooth that are circumferentially spaced from one another about the rotation axis. The winding is to the core body and includes two or more coils connected electrically in series with one another. A first of the coils is seated circumferentially about both the first tooth and the second tooth to define a distributed pole circumferentially spanning both the first tooth and the second tooth. Electric machines and methods of making cores for electric machines are also described.

A brushless DC dynamo includes a circular armature with N sets of first armature coils spaced with each other in sequence, N sets of second armature coils spaced with each other in sequence, a plurality of first wires and a plurality of second wires, and each first wire and each second wire respectively interconnecting between one set of the first armature coils and one set of the second armature coils; a control unit; a magnetic unit, disposed inside the circular armature unit, comprising a pair of magnetic poles, wherein the circular armature unit and the magnetic unit can rotate relatively to each other under control; and a position sensor for detecting the position of the magnetic unit, and outputting the information of magnetic unit's position to the control unit to trigger the control unit to output a control signal to control the first and second control switches.

A brushless DC dynamo includes a circular armature with N sets of first armature coils spaced with each other in sequence, N sets of second armature coils spaced with each other in sequence, a plurality of first wires and a plurality of second wires, and each first wire and each second wire respectively interconnecting between one set of the first armature coils and one set of the second armature coils; a control unit; a magnetic unit, disposed inside the circular armature unit, comprising a pair of magnetic poles, wherein the circular armature unit and the magnetic unit can rotate relatively to each other under control; and a position sensor for detecting the position of the magnetic unit, and outputting the information of magnetic unit's position to the control unit to trigger the control unit to output a control signal to control the first and second control switches.

A motor control system is configured to: determine a current supply limit for an electric motor; receive a current supply of the electric motor; identify one or more motor commands; adjust the one or more motor commands in response to a determination that the current supply is greater than the current supply limit; and selectively control the electric motor using the adjusted one or more motor commands.

A motor control system is configured to: determine a current supply limit for an electric motor; receive a current supply of the electric motor; identify one or more motor commands; adjust the one or more motor commands in response to a determination that the current supply is greater than the current supply limit; and selectively control the electric motor using the adjusted one or more motor commands.

The invention relates to a synchronously excited rotary machine with a superconductive rotor comprising a plurality of projecting first pole units of a magnetic material and a plurality of second pole units having superconductive coils wrapped around a core element of a magnetic material. Each second pole unit is positioned between two adjacent first pole units. The second pole units are spaced apart from aback iron and the first pole units via a plurality of thermally insulating support elements, wherein this spacing is evacuated so that it acts as magnetic air gap. An enclosed housing is provided on the back iron in which the first and second pole units are arranged, where-in the superconductive coils of the second pole units are in fluid communication with a cooling system. The first pole units and back iron are operated at an ambient temperature while the second pole units are operated at a cryogenic operating temperature.