The present disclosure relates generally to a propulsion system for an elevator having a first motor portion mounted to one of an object to be moved and a stationary structure and a second motor portion mounted to the other of the object to be moved and the stationary structure, the first motor portion having at least one coil.

In an electric power steering apparatus, a motor housing includes an axial end part opposite to an output part of an electric motor. An electronic control section is arranged at the axial end part of the motor housing. The electronic control section includes a control circuit part, a power supply circuit part, and a power conversion circuit part. The axial end part of the motor housing includes a power conversion part thermal radiation region and a power supply part thermal radiation region. The power conversion circuit part is mounted to the power conversion part thermal radiation region to allow heat to be transferred from the power conversion circuit part to the motor housing. The power supply circuit part is mounted to the power supply part thermal radiation region to allow heat to be transferred from the power supply circuit part to the motor housing.

In an electric power steering apparatus, a motor housing includes an axial end part opposite to an output part of an electric motor. An electronic control section is arranged at the axial end part of the motor housing. The electronic control section includes a control circuit part, a power supply circuit part, and a power conversion circuit part. The axial end part of the motor housing includes a power conversion part thermal radiation region and a power supply part thermal radiation region. The power conversion circuit part is mounted to the power conversion part thermal radiation region to allow heat to be transferred from the power conversion circuit part to the motor housing. The power supply circuit part is mounted to the power supply part thermal radiation region to allow heat to be transferred from the power supply circuit part to the motor housing.

A ram air turbine having: a strut assembly having an outer housing enclosing a first inner chamber; a generator housing operatively connected to the strut assembly, the generator housing having an outer surface enclosing a second inner chamber, the second inner chamber being fluidly connected to first inner chamber; a turbine assembly operably connected to the strut assembly, the turbine assembly in operation rotates in freestream air; and a power generation device mechanically connected to the turbine assembly and located within the second inner chamber, the power generation device generates power as turbine assembly rotates. The strut assembly includes a first screen portion having a plurality of inlet holes integrally formed in the outer housing. The generator housing includes a second screen portion having a plurality of outlet holes integrally formed in the outer surface. Freestream air passes through inlet holes, over the power generation device, and out outlet holes.

A ram air turbine having: a strut assembly having an outer housing enclosing a first inner chamber; a generator housing operatively connected to the strut assembly, the generator housing having an outer surface enclosing a second inner chamber, the second inner chamber being fluidly connected to first inner chamber; a turbine assembly operably connected to the strut assembly, the turbine assembly in operation rotates in freestream air; and a power generation device mechanically connected to the turbine assembly and located within the second inner chamber, the power generation device generates power as turbine assembly rotates. The strut assembly includes a first screen portion having a plurality of inlet holes integrally formed in the outer housing. The generator housing includes a second screen portion having a plurality of outlet holes integrally formed in the outer surface. Freestream air passes through inlet holes, over the power generation device, and out outlet holes.

A linear motor includes an excitation unit including a shaft and a plurality of permanent magnets located in the shaft, and an armature including a plurality of coils surrounding the excitation unit and a magnetic cover covering the coils. The plurality of coils of the same phase group are continuously wound over a plurality of insulative bobbins. A tap conductor, a jumper wire between the coils, and a terminal wire of the coils in different phase groups that are continuously wound are separately disposed in different corner portions in the magnetic cover, and the terminal wire of each phase is connected to a circuit board.

A linear motor includes an excitation unit including a shaft and a plurality of permanent magnets located in the shaft, and an armature including a plurality of coils surrounding the excitation unit and a magnetic cover covering the coils. The plurality of coils of the same phase group are continuously wound over a plurality of insulative bobbins. A tap conductor, a jumper wire between the coils, and a terminal wire of the coils in different phase groups that are continuously wound are separately disposed in different corner portions in the magnetic cover, and the terminal wire of each phase is connected to a circuit board.

A rotating shaft is attached rotatably to a front body and a rear body of an AC generator. Feeding brushes are disposed around a rear end portion of the rotating shaft. A heat radiating plate is attached to a rear end of the rear body. A control board is attached to a back of the heat radiating plate. External air flows in from an air inlet and advances in a radially inward direction after passing through a cooling fin disposed on the heat radiating plate by a first air flow passage. In addition, the external air passes through and around the rear end portion of the rotating shaft after flowing into a rear surface side of the heat radiating plate via a second air passage.

A rotating shaft is attached rotatably to a front body and a rear body of an AC generator. Feeding brushes are disposed around a rear end portion of the rotating shaft. A heat radiating plate is attached to a rear end of the rear body. A control board is attached to a back of the heat radiating plate. External air flows in from an air inlet and advances in a radially inward direction after passing through a cooling fin disposed on the heat radiating plate by a first air flow passage. In addition, the external air passes through and around the rear end portion of the rotating shaft after flowing into a rear surface side of the heat radiating plate via a second air passage.

An electric machine is supplied with air for cooling purposes. The electric machine has a housing (40) with cooling ducts for cooling air. To improve and/or simplify the cooling of the electric machine, air-distributing ducts (71) are formed in the housing (40) and emerge from a common air supply duct (70).