A stacked motor assembly for an aircraft includes a forward motor having an exhaust port and an aft motor disposed aft of the forward motor, the aft motor having an intake port. The stacked motor assembly includes an exhaust conduit originating from the exhaust port of the forward motor and disposed at least partially around the aft motor such that exhaust from the forward motor bypasses the aft motor. The stacked motor assembly also includes an intake conduit terminating at the intake port of the aft motor and disposed at least partially around the forward motor such that intake air for the aft motor bypasses the forward motor.

A stacked motor assembly for an aircraft includes a forward motor having an exhaust port and an aft motor disposed aft of the forward motor, the aft motor having an intake port. The stacked motor assembly includes an exhaust conduit originating from the exhaust port of the forward motor and disposed at least partially around the aft motor such that exhaust from the forward motor bypasses the aft motor. The stacked motor assembly also includes an intake conduit terminating at the intake port of the aft motor and disposed at least partially around the forward motor such that intake air for the aft motor bypasses the forward motor.

A radial ventilation cooling structure for a motor includes at least three core sections, a ventilation channel steel is provided between every two adjacent core sections, and a ventilation channel is formed between the ventilation channel steel and the every two adjacent core sections, and impedances of the multiple ventilation channels are gradually increased in a direction from two ends of the motor to a center of the motor.

A radial ventilation cooling structure for a motor includes at least three core sections, a ventilation channel steel is provided between every two adjacent core sections, and a ventilation channel is formed between the ventilation channel steel and the every two adjacent core sections, and impedances of the multiple ventilation channels are gradually increased in a direction from two ends of the motor to a center of the motor.

A propulsion and electric power generation system includes a gas turbine propulsion engine, an electrical generator, an aircraft power distribution system, a plurality of auxiliary fans, and a controller. The gas turbine propulsion engine includes at least a low-pressure turbine coupled to a fan via a low-pressure spool, and the low-pressure turbine is configured to generate mechanical power. The electrical generator is directly connected to the low-pressure spool and generates a total amount of electrical power (Pe). The aircraft power distribution system receives a first fraction (Pa) of the total amount of electrical power. The auxiliary fans receive a second fraction (Pf) of the total amount of electrical power. The controller is configured to control a ratio of Pf to Pa (Pf/Pa) such that the ratio spans a range from less than 0.6 to at least 0.9.

A propulsion and electric power generation system includes a gas turbine propulsion engine, an electrical generator, an aircraft power distribution system, a plurality of auxiliary fans, and a controller. The gas turbine propulsion engine includes at least a low-pressure turbine coupled to a fan via a low-pressure spool, and the low-pressure turbine is configured to generate mechanical power. The electrical generator is directly connected to the low-pressure spool and generates a total amount of electrical power (Pe). The aircraft power distribution system receives a first fraction (Pa) of the total amount of electrical power. The auxiliary fans receive a second fraction (Pf) of the total amount of electrical power. The controller is configured to control a ratio of Pf to Pa (Pf/Pa) such that the ratio spans a range from less than 0.6 to at least 0.9.

An active magnetic bearing apparatus for supporting a rotor of a rotary machine comprises an axial magnetic bearing unit and a radial magnetic bearing unit mounted directly to one another. One of the axial magnetic bearing unit and the radial magnetic bearing unit is mounted to a support for attachment to a housing of the rotary machine.

An active magnetic bearing apparatus for supporting a rotor of a rotary machine comprises an axial magnetic bearing unit and a radial magnetic bearing unit mounted directly to one another. One of the axial magnetic bearing unit and the radial magnetic bearing unit is mounted to a support for attachment to a housing of the rotary machine.

A drawworks system for a mineral extraction system includes a drum mounted on a drum shaft and a motor assembly configured to drive rotation of the drum. The motor assembly includes a motor, a variable frequency drive positioned vertically above the motor relative to a skid, and a cooling assembly configured to cool the motor and the variable frequency drive. The cooling assembly is coupled to a housing of the variable frequency drive and is positioned vertically above a drive shaft of the motor relative to the skid.

A drawworks system for a mineral extraction system includes a drum mounted on a drum shaft and a motor assembly configured to drive rotation of the drum. The motor assembly includes a motor, a variable frequency drive positioned vertically above the motor relative to a skid, and a cooling assembly configured to cool the motor and the variable frequency drive. The cooling assembly is coupled to a housing of the variable frequency drive and is positioned vertically above a drive shaft of the motor relative to the skid.