Abstract: A motor controller configured to be coupled to a motor that is coupled to a fan is described. The motor controller includes a processor coupled to a memory, and is configured to operate the motor in a first operating mode in which the motor rotates the fan in a first direction at a first speed. The motor controller is further configured to operate the motor in a restriction detection mode in which the motor rotates the fan in a second direction that is opposite the first direction, determine a torque associated with the motor while the motor is rotating the fan in the second direction, determine that the torque is not within a predefined threshold range in the memory, and determine that a restriction exists in a fluid flow path associated with the motor in response to determining that the torque is not within the predefined threshold range.

Abstract: In one aspect, a three-phase axial flux stator is provided. The stator includes a plurality of stator modules oriented in an axial direction, and each of the stator modules includes a pair of teeth connected by a yoke section. The stator also includes a plurality of windings, each of the windings wound around one of the stator modules. The stator modules and the windings produce a three-phase flux in an axial direction.

Abstract: A fluid flow system is provided. The system includes a rotation producing device, a first fluid flow device coupled to the rotation producing device and a second fluid flow device coupled to the rotation producing device and spaced from the first fluid flow device.

Abstract: An axial flux electrical machine includes a housing having a center portion with a cylindrical wall, a stator assembly attached to the housing, a bearing assembly attached to the stator assembly, and a rotor assembly rotatably attached to the bearing assembly. A bearing mount system includes a bearing isolator that is attached to the wall of the housing, and a bearing cup that is attached to the bearing assembly and the bearing isolator.

Abstract: A rotor for connection to a rotating member for use in an electric machine is provided. The rotor includes a first member connected to the rotating member and generally positioned perpendicularly thereto and a second member connected to one of the rotating member and the first member.

Abstract: An axial flux electric machine comprises a rotor assembly configured to rotate about an axis of rotation. A stator core is coupled to the rotor assembly. The stator core comprises a stator core base and a plurality of circumferentially-spaced stator teeth extending from the base in a direction parallel to the axis. Each stator tooth of the plurality of stator teeth comprises a top surface, a pair of opposing circumferential sides, and a chamfered portion defined at an intersection of the top surface and each of the pair of opposing sides. The chamfered portion facilitates reducing an amount of torque ripple produced by the axial flux electric motor.

Abstract: A motor housing for enclosing a first stator module and a second stator module of a motor is provided. The motor housing includes a stator housing. The stator housing has a first module portion coupled to the first stator module, wherein the first module has a first contoured shape complimentary to the first stator module. A second module portion is coupled to the second stator module, wherein the second module has a second contoured shape complimentary to the second stator module. The housing also includes a base portion having a first side coupled to the first module portion and a second side coupled to the second module portion. The base portion further includes a third side coupled to and extends between the first side and the second side. A rotor housing is coupled to the stator housing and has a fastener coupled to the third side.

Abstract: In one aspect, a three-phase axial flux stator is provided. The stator includes a plurality of stator modules oriented in an axial direction, and each of the stator modules includes a pair of teeth connected by a yoke section. The stator also includes a plurality of windings, each of the windings wound around one of the stator modules. The stator modules and the windings produce a three-phase flux in an axial direction.