A rotary electrical machine comprises a cylindrical stator that generates a magnetic field, a rotor that generates torque through the magnetic field, and a housing that accommodates the stator. The housing comprises a housing body covering an outer circumferential part of the stator, and a housing lid part attached to one end side of the housing body. The stator comprises a stator core having a plurality of teeth, and a stator coil mounted on the stator core, and the stator coil has a plurality of windings wound onto the plurality of teeth, and a crossover wire connecting at least two of the plurality of windings. The crossover wire comprises an insertion mechanism that is provided to the housing lid part and electrically connects end parts of the windings and an end part of the crossover wire through insertion contact.

A multi-rotor radial flux arch stator motor utilizing two or more rotors and one or more stators positioned in between every two adjacent rotors. A plurality of stator windings are wound around the stator cores occupying the space in between the rotors. The stator cores concentrate and direct the flux produced by the stator windings radially to rotors on either side of the stators. The number of stator poles is equal to two times the number of stator windings. The motor design of the invention can be used for both synchronous and asynchronous motor applications. For synchronous applications, a mechanical linkage serves to synchronize the rotors and also transmits torque between rotor shafts if all rotor shafts are not equally loaded. For asynchronous motor applications the motor can be designed without a mechanical linkage between rotors depending on the distribution of the load.

A rotary actuator includes a PWB motor and a wave gear drive. The PWB motor is an axial gap motor. A motor rotor in the PWB motor includes a rotor disk coaxially affixed to a hollow motor shaft and a rotor magnet affixed to the rotor disk. A motor stator is composed of a printed wiring board, and includes an insulating substrate and a motor coil defined by printed wiring formed on the insulating substrate. Compared with a conventional rotary actuator using an SPM motor or the like, the shaft length can be shortened and the hollow diameter thereof can be increased.

Modular cooling assemblies are provided for simultaneously cooling both a power module and a vehicle motor. Each cooling assembly may include a first cooling structure defining at least one major surface in thermal communication with the vehicle motor. A second cooling structure may be provided, defining at least one major surface in thermal communication with a power module. An interlayer structure may be provided, configured to couple the first cooling structure to the second cooling structure. The first cooling structure, the second cooling structure, and the interlayer structure are positioned in a stacked arrangement and configured to provide a flow of coolant fluid from a fluid inlet defined in first cooling structure, through the interlayer structure, and to at least one heat sink feature of the second cooling structure. The coolant fluid is then directed through a fluid outlet defined in the second cooling structure.

A brushless motor has a stator assembly, and a frame within which the stator assembly is housed. The stator assembly has a plurality of stator core sub-assemblies, each having a stator core, a bobbin attached to the stator core, and a winding wound about the bobbin. Each bobbin has a connection portion for connecting to an adjacent bobbin in the stator assembly, and the frame is overmoulded to the stator assembly.

Aspects of the disclosure relate to a cycloidal magnetic gear. The cycloidal magnetic gear includes an outer rotor. A plurality of magnetic pole pairs is disposed on an inner circumference of the outer rotor. A first, second, and third inner rotor is disposed within the outer rotor. The first, second, and third inner rotors includes a magnetic pole pairs disposed on an outer circumference thereof. The first inner rotor and the third inner rotor have a thickness of approximately half the thickness of the second inner rotor. The first inner rotor, the second inner rotor, and the third inner rotor balance moments acting on a drive shaft.

Polyphase electric machine including a first motion actuation assembly and a rotatable second motion actuation assembly, the first and second motion actuation assemblies together defining first and second opposing lateral faces, of the polyphase electric machine; the polyphase electric machine further having at least one phase generator including a plurality of control assemblies, each control assembly containing an input module and an output module, the input and output modules being arranged on the first lateral face and on the second lateral face of the polyphase electric machine.

Provided is a rotor including a first rotor body including a first protrusion protruding from an outer circumferential surface thereof and a second rotor body stacked on and coupled to the first rotor body and including a second protrusion disposed at a position different from the first protrusion with respect to a circumferential direction and protruding from an outer circumferential surface thereof, wherein a height of the first protrusion is formed to be greater than a height of the first rotor body, and a height of the second protrusion is formed to be greater than a height of the second rotor body. The rotor is formed so that coils are wound around the respective protrusions that are divided and have relatively wide winding spaces unlike a rotor integrated with protrusions around which coils are wound, thereby increasing a coil space factor and providing an effect of facilitating a winding task.

The invention relates to a rotor including a one-piece metal frame having a cylindrical portion that is closed on one side by a closure portion forming a hub. Parallel axial rows of permanent magnets are mechanically and directly attached to the inner surface of the cylindrical portion of the frame by strips. The strips are preferably non-magnetic, and attached mechanically to the frame and arranged longitudinally between each row of magnets. The strips have a base that rests on the frame and the base is extended by flaring by two outwardly inclined sides. The inclined sides engage with inward inclined surfaces that have a complementary shape on the corresponding lateral edges of the adjacent magnets, such that the magnets are locked vertically and laterally.

A rotating electrical machine includes a stator core including a plurality of stacked electromagnetic steel sheets, the stator core includes a core back and a tooth protruding from the core back, the tooth includes: plural first welded portions arranged on a first lateral face of the tooth with respect to a plane extending in a stacking direction of the electromagnetic steel sheets and equally dividing the width of the tooth, the first welded portions being arranged in the stacking direction; and plural second welded portions arranged on a second lateral face of the tooth with respect to the plane extending in the stacking direction, the second welded portions being arranged in the stacking direction, and the first welded portions and the second welded portions are staggered in the stacking direction.