The invention relates to an electric motor (10) comprising a rotor (11) mounted on a shaft (12), a stator (13) arranged around the motor (11), a front bearing (14) and a rear bearing (15) which are connected to one another, the front and rear bearings (14, 15) forming an internal cavity in which the rotor (11) and the stator (13) are housed, the electric motor (10) being cooled by a coolant circulating in the internal cavity in contact with winding overhangs (19) extending axially beyond two end faces (134, 135) of the stator (13), these respectively being the front end face (134) and a rear end face (135), the coolant entering the internal cavity via at least one fluid inlet duct (144) and exiting the internal cavity via at least one fluid outlet duct (145, 146), characterized in that the motor (10) further comprises two end plates (34, 35), these respectively being a front end plate (34) and a rear end plate (35), of annular shape and having a U-shaped cross section, the front end plate (34) and the rear end plate (35) respectively covering the winding overhangs (19) protruding beyond, respectively, the front end face (134) and rear end face (135) of the stator (13) and being configured to form, respectively, a front circulation tunnel and the rear circulation tunnel for the coolant, the front and rear circulation tunnels being in fluidic communication with the at least one fluid inlet duct (144) and the at least one fluid outlet duct (145, 146), and in that each of the end plates (34, 35) is fixed, preferably detachably, to the stator (13) by means of at least two assembly tabs (39) which are formed so that they project radially from an internal peripheral face of each of the end plates (34, 35), each of the assembly tabs (39) being configured to be inserted into an intermediary space between two adjacent winding overhangs (19).

A housing for an electrical machine includes an endshield and a cover. The electrical machine has a rotation axis, a rotor assembly including a rotor, and a controller assembly. The rotor assembly includes a bearing assembly. The endshield includes an annular center section including a bore sized to couple to the bearing assembly. The cover is coupled to the endshield. The cover includes a generally axially-extending flange wall formed about a perimeter of the cover, a volute-shaped inner chamber configured to at least partially enclose the rotor coupled to the rotor assembly of the electrical machine, and a cooling channel positioned radially outward from the inner chamber. The cooling channel is configured to at least partially enclose the controller assembly of the electrical machine.

A housing for an electrical machine includes an endshield and a cover. The electrical machine has a rotation axis, a rotor assembly including a rotor, and a controller assembly. The rotor assembly includes a bearing assembly. The endshield includes an annular center section including a bore sized to couple to the bearing assembly. The cover is coupled to the endshield. The cover includes a generally axially-extending flange wall formed about a perimeter of the cover, a volute-shaped inner chamber configured to at least partially enclose the rotor coupled to the rotor assembly of the electrical machine, and a cooling channel positioned radially outward from the inner chamber. The cooling channel is configured to at least partially enclose the controller assembly of the electrical machine.

This invention is concerning a rotary electric machine 1, this electric motor 1 being provided with an inner cylinder 2, a rotor 3 provided so as to be rotatable inside the inner cylinder 2, a stator 4 fixed to the inner cylinder 2 and separated via a gap from an outer periphery of the rotor 3, and an outer cylinder 8 that covers an entire periphery of the inner cylinder 2 and forms a space 15, which serves as a coolant passage, in conjunction with the inner cylinder 2, wherein both ends of the inner cylinder 2 and the outer cylinder 8 in an axial direction are fixed to each other by cylinder welding portions 9 formed by welding. Accordingly, a rotary electric machine that is small and light can be obtained at low cost.

This invention is concerning a rotary electric machine 1, this electric motor 1 being provided with an inner cylinder 2, a rotor 3 provided so as to be rotatable inside the inner cylinder 2, a stator 4 fixed to the inner cylinder 2 and separated via a gap from an outer periphery of the rotor 3, and an outer cylinder 8 that covers an entire periphery of the inner cylinder 2 and forms a space 15, which serves as a coolant passage, in conjunction with the inner cylinder 2, wherein both ends of the inner cylinder 2 and the outer cylinder 8 in an axial direction are fixed to each other by cylinder welding portions 9 formed by welding. Accordingly, a rotary electric machine that is small and light can be obtained at low cost.

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 cooling jacket includes a jacket having an axial end provided with an opening, and a sealing structure which is arranged in the opening. A member selected from the group consisting of the jacket and the sealing structure has a radial deformation to connect the jacket to the sealing structure. The radial deformation is configured to extend into the opening.

A cooling jacket includes a jacket having an axial end provided with an opening, and a sealing structure which is arranged in the opening. A member selected from the group consisting of the jacket and the sealing structure has a radial deformation to connect the jacket to the sealing structure. The radial deformation is configured to extend into the opening.

A cooling arrangement for cooling a stator for an electric machine. The cooling arrangement comprising a stator fixedly mounted relative to a rotational axis. The stator comprises a stator yoke and stator grooves. Windings are provided in the stator grooves, which form first and second winding heads. First and second fluid rings are provided at opposite ends on the stator yoke. The first fluid ring has a fluid inflow opening from a stator housing. The stator yoke has a plurality of axial stator ducts extending in the axial direction, which enable the inflowing fluid to flow through from the first fluid ring to the second fluid ring, and the second fluid ring redirects some of the fluid.