A motor comprising a casing, rotating shaft, magnetic ring, three-phase hollow cup coil winding and insulation end cover, is provided. The casing includes a sleeve and inner core arranged coaxially with the sleeve and air guide plates connected to the sleeve and inner core, the sleeve, inner core and two adjacent air guide plates are surrounded to form an air guide channel, the inner core is provided with a mounting hole, the bearing is installed in the mounting hole, and a rotating shaft passes through the bearing, a magnetic ring is sleeved outside one end of the rotating shaft, the three-phase hollow cup coil winding is sleeved outside the magnetic ring. A rotating gap is set between the three-phase hollow cup coil winding and the magnetic ring, and insulating end cover is installed on the outlet of the sleeve. A wind end fixes the three-phase hollow cup coil winding in the sleeve, and the inner core is provided with heat dissipation holes that are all connected with installation holes.

A motor comprising a casing, rotating shaft, magnetic ring, three-phase hollow cup coil winding and insulation end cover, is provided. The casing includes a sleeve and inner core arranged coaxially with the sleeve and air guide plates connected to the sleeve and inner core, the sleeve, inner core and two adjacent air guide plates are surrounded to form an air guide channel, the inner core is provided with a mounting hole, the bearing is installed in the mounting hole, and a rotating shaft passes through the bearing, a magnetic ring is sleeved outside one end of the rotating shaft, the three-phase hollow cup coil winding is sleeved outside the magnetic ring. A rotating gap is set between the three-phase hollow cup coil winding and the magnetic ring, and insulating end cover is installed on the outlet of the sleeve. A wind end fixes the three-phase hollow cup coil winding in the sleeve, and the inner core is provided with heat dissipation holes that are all connected with installation holes.

One embodiment is an electric drive system including a plurality of redundant motors, wherein power generated by the plurality of motors is used to drive a rotor system comprising a rotor shaft having a plurality of rotor blades connected thereto via a swashplate; a gear box associated with the plurality of redundant motors; a cyclic actuation system for controlling an individual pitch of the rotor blades connected to the swashplate; and at least one structural element for retaining the redundant motors, the gear box, and the cyclic actuation system together as a single integrated unit.

One embodiment is an electric drive system including a plurality of redundant motors, wherein power generated by the plurality of motors is used to drive a rotor system comprising a rotor shaft having a plurality of rotor blades connected thereto via a swashplate; a gear box associated with the plurality of redundant motors; a cyclic actuation system for controlling an individual pitch of the rotor blades connected to the swashplate; and at least one structural element for retaining the redundant motors, the gear box, and the cyclic actuation system together as a single integrated unit.

An electric machine comprising at least one housing in which a rotor having coolant guide vanes provided at an end face is accommodated, and an annular cooling fin structure through which coolant conveyed by the coolant guide vanes is passed and having cooling fins which are axially covered by an annular cover section in such a way that there is an inlet area for the coolant supplied by the coolant guide vanes and an outlet area, wherein the cooling fin structure is formed on a side of an axial end wall of the housing facing the interior of the housing, on which an annular disk-shaped cover forming the cover section is attached.

An electric machine comprising at least one housing in which a rotor having coolant guide vanes provided at an end face is accommodated, and an annular cooling fin structure through which coolant conveyed by the coolant guide vanes is passed and having cooling fins which are axially covered by an annular cover section in such a way that there is an inlet area for the coolant supplied by the coolant guide vanes and an outlet area, wherein the cooling fin structure is formed on a side of an axial end wall of the housing facing the interior of the housing, on which an annular disk-shaped cover forming the cover section is attached.

A canned motor device includes a base, a fixed seat, a motor unit, a motor cover and a main cover. The base is formed in a shape of a hollow cylinder that surrounds an axis, and defines an accommodating space in which the fixed seat is disposed. The motor unit includes a stator, a rotor and an impeller. The motor cover is disposed on the base and covers the impeller. The main cover is located at one side of the base opposite to the motor cover along the axis, and has an inner surface, an annular protrusion that protrudes from the inner surface and that has an annular end surface, and an inner heat-dissipating space that is defined by the inner surface and the annular protrusion and that is adjacent to the stator.

A canned motor device includes a base, a fixed seat, a motor unit, a motor cover and a main cover. The base is formed in a shape of a hollow cylinder that surrounds an axis, and defines an accommodating space in which the fixed seat is disposed. The motor unit includes a stator, a rotor and an impeller. The motor cover is disposed on the base and covers the impeller. The main cover is located at one side of the base opposite to the motor cover along the axis, and has an inner surface, an annular protrusion that protrudes from the inner surface and that has an annular end surface, and an inner heat-dissipating space that is defined by the inner surface and the annular protrusion and that is adjacent to the stator.

An electric machine including a housing assembly including a first end and a second end, a stator, a rotor, and a fan is provided. The housing assembly includes a terminal box positioned at the first end, an end plate coupled to the terminal box and including a plurality of inlet apertures, and a casing coupled to the end plate and extending toward the second end. The stator is fixedly secured to the housing assembly and positioned within the casing. The rotor is rotatably secured to the housing assembly and positioned within the casing such that the stator and the rotor are separated within the casing by an air gap. The fan is positioned inside the casing and is configured to draw air into the housing assembly through the plurality of inlet apertures.

The present invention provides a rotary electric machine which suppresses a temperature rise of bearings by reducing heat transfer from internal air to the bearings and heat conduction from a rotor core, and improves the lubrication life of the bearings. A rotary electric machine of the present invention comprises a rotor including a shaft; a stator placed facing the rotor with a certain gap (an air gap) therebetween and supported by a stator frame; bearings which sustain the shaft; and end brackets which hold the bearings, wherein one of the end brackets includes a heat insulating layer on an inner side or an outer side of the machine to prevent heat from flowing into the bearings.