Abstract: A fan assembly includes an axis of rotation and a fan that includes an inlet ring and a rear plate that together define an inner fan chamber, wherein the fan is a backward curved plug fan. The fan assembly also includes an axial flux motor coupled to the rear plate such that the motor is positioned entirely outside the fan chamber to facilitate preventing interference between the motor and an airflow within the fan chamber.

Abstract: A stator module pack for an axial flux electric machine is provided. The stator module pack includes a housing for attachment to a stator base and a plurality of stator modules attached to the housing. Each stator module includes a core having at least one winding disposed thereon. A plurality of stator module packs is coupled to a stator base to form a stator of the axial flux electric machine.

Abstract: A stator module pack for an axial flux electric machine includes a housing for attachment to a stator base, a plurality of stator modules attached to the housing, and a drive unit attached to the housing. Each stator module includes a core having at least one winding disposed thereon. The drive unit is electrically connected to at least one stator module. A plurality of stator module packs and a plurality of drive units are coupled to the stator base to form a stator of the axial flux electric machine.

Abstract: A motor control circuit is provided, including a first circuit, a second circuit, and a microcontroller. The first circuit is configured to conduct an analog tachometer output signal. The second circuit is configured to conduct an analog control input signal. The microcontroller is coupled to the first circuit and the second circuit, and is configured to transmit and receive serial data over a serial channel including the first circuit and the second circuit.

Abstract: A stator module pack for an axial flux electric machine includes a housing for attachment to a stator base, a plurality of stator modules attached to the housing, and a drive unit attached to the housing. Each stator module includes a core having at least one winding disposed thereon. The drive unit is electrically connected to at least one stator module. A plurality of stator module packs and a plurality of drive units are coupled to the stator base to form a stator of the axial flux electric machine.

Abstract: A stator module pack for an axial flux electric machine is provided. The stator module pack includes a housing for attachment to a stator base and a plurality of stator modules attached to the housing. Each stator module includes a core having at least one winding disposed thereon. A plurality of stator module packs is coupled to a stator base to form a stator of the axial flux electric machine.

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 motor control circuit is provided, including a first circuit, a second circuit, and a microcontroller. The first circuit is configured to conduct an analog tachometer output signal. The second circuit is configured to conduct an analog control input signal. The microcontroller is coupled to the first circuit and the second circuit, and is configured to transmit and receive serial data over a serial channel including the first circuit and the second circuit.

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: A fan assembly includes an axis of rotation and a fan that includes an inlet ring and a rear plate that together define an inner fan chamber, wherein the fan is a backward curved plug fan. The fan assembly also includes an axial flux motor coupled to the rear plate such that the motor is positioned entirely outside the fan chamber to facilitate preventing interference between the motor and an airflow within the fan chamber.

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.