An electric motor assembly includes an outer rotor motor, a sensor, and a brake assembly. The outer rotor motor includes a stator and a rotor. The rotor at least partly circumscribes the stator and is rotatable relative to the stator about an axis. The rotor includes a rotor core extending radially outwardly to present axially opposite first and second sides, and a plurality of magnets supported relative to the rotor core. The sensor is operable to sense a condition associated with the electric motor assembly. The brake assembly is operably coupled to the rotor core to selectively reduce the rotational speed of the rotor. The brake assembly is positioned at least partly axially outward from the first side of the rotor core, and the sensor is positioned at least partly axially outward from the second side of the rotor core.

The invention relates to an electric machine (1) comprising a stator (10) and a rotor (20) separated from the stator (10) by way of an air gap, wherein the rotor (20) has a plurality of shell-like magnet segments (30) secured to a rotor body (22), and wherein the magnet segments (30) have in the circumferential direction in each case a plurality of sections (32, 33, 34) with different magnetic polarizations, which each form a magnetic pole of the rotor (20), and wherein transition zones (36) are formed between the sections (32, 33, 34) of the magnet segments (30) with different magnetic polarizations, wherein recesses (40) are provided in the magnet segments on the side facing the stator (10). It is proposed that the transition zones (36) are formed so as to run obliquely in the axial direction of the rotor (20) and that the transition zones (36) are formed in the region of the recesses (40).

A rotating electrical machine is provided which is equipped with a rotor core and a magnet unit made up of a plurality of magnets. Each of the magnets is oriented to have an easy axis of magnetization which extends more parallel to a d-axis in a region closer to the d-axis than that in a region close to a q-axis does. The easy axis of magnetization defines a magnet-produced magnetic path. The rotor core includes d-axis protrusions through which magnetic flux passes along the d-axis and does not have q-axis protrusions through which magnetic flux passes along the q-axis. This causes a magnetic resistance in the region close to the d-axis to be lower than that in the region closer to the q-axis, thereby providing salient poles. This structure enables the rotating electrical machine to be reduced in size and have an enhanced efficiency in operation.

A method a magnet system for a rotor of a permanent magnet electrical machine includes: a first module including a first support member; a second module includes a second support member; wherein the first module includes a first permanent magnet supported by the first support member and/or the second module includes a second permanent magnet supported by the second support member, wherein the first support member and the second support member have respective contact portions which are at least partly structurally complementary to each other allowing to arrange the first module and the second module adjacent to each other in the axial direction, while the contact portions contact each other and causing traverse shift in a direction travers to the axial direction, when pushed towards each other in the axial direction.

A method a magnet system for a rotor of a permanent magnet electrical machine includes: a first module including a first support member; a second module includes a second support member; wherein the first module includes a first permanent magnet supported by the first support member and/or the second module includes a second permanent magnet supported by the second support member, wherein the first support member and the second support member have respective contact portions which are at least partly structurally complementary to each other allowing to arrange the first module and the second module adjacent to each other in the axial direction, while the contact portions contact each other and causing traverse shift in a direction travers to the axial direction, when pushed towards each other in the axial direction.

A brushless motor includes a stator assembly and a rotor assembly one coaxially disposed around the other. The rotor assembly includes a spindle and a rotor yoke coaxially disposed around the spindle. At least two magnet receiving grooves for receiving magnets are formed in an inner wall of the rotor yoke in a circumferential direction, the magnets are inserted into the magnet receiving grooves, and a magnetism isolating gap is formed between the at least two magnet receiving grooves. Through the external-rotor design, the size and weight of the motor are effectively reduced, the working efficiency of the motor is effectively improved under the same power, the life of a lithium battery is further prolonged, the energy conversion requirement is met, and user experience is improved.

A brushless motor includes a stator assembly and a rotor assembly one coaxially disposed around the other. The rotor assembly includes a spindle and a rotor yoke coaxially disposed around the spindle. At least two magnet receiving grooves for receiving magnets are formed in an inner wall of the rotor yoke in a circumferential direction, the magnets are inserted into the magnet receiving grooves, and a magnetism isolating gap is formed between the at least two magnet receiving grooves. Through the external-rotor design, the size and weight of the motor are effectively reduced, the working efficiency of the motor is effectively improved under the same power, the life of a lithium battery is further prolonged, the energy conversion requirement is met, and user experience is improved.

A laundry appliance includes a tub having a rear wall that includes a plurality of structural ribs. A drive hub has a bearing housing insert injection molded into the rear wall. A stator is attached to the drive hub at stator fastening portions exposed through the rear wall of the tub. A reinforcing cap is fixed to the structural ribs of the rear wall of the tub. The bearing housing of the drive hub extends rearwards through a portion of the reinforcing cap. The stator fastening portions are exposed through the reinforcing cap.

One variation of a system for an electric motor includes a set of coil assemblies defining: an inner radial facet, an outer radial facet, a first axial facet, and a second axial facet opposite the first axial facet. Additionally, each coil assembly in the set of coil assemblies includes a receiving member arranged at the outer radial facet of the coil assembly. Furthermore, the system includes a rotor comprising a set of magnetic elements: encompassing the inner radial facet, the outer radial facet, the first axial facet, and the second axial facet of the set of coil assemblies; and defining a radial magnetic tunnel. The system also includes a housing: engaging the receiving member of each coil assembly, in the set of coil assemblies to couple the housing to the set of coil assemblies; and includes a shaft coupled to the set of magnetic elements.

A fan for use in agriculture which has a BLDC motor which allows for varying the speed of the fan to vary the airflow rate of the fan and vary the efficiency of the fan. A ventilation system for use in a livestock confinement building to maximize a rate of growth of the livestock. A process for maximizing the growth of livestock in a livestock confinement building by controlling the airflow in the livestock confinement building.