초록 ▼

A brushless electric motor 26 includes a stator assembly 32 defining an interior chamber 38. The stator assembly includes a stator core 34 and windings 36. The windings and at least a portion 44 of the stator core are in open communication with the interior chamber. A rotor assembly 42 is provided i

A brushless electric motor 26 includes a stator assembly 32 defining an interior chamber 38. The stator assembly includes a stator core 34 and windings 36. The windings and at least a portion 44 of the stator core are in open communication with the interior chamber. A rotor assembly 42 is provided in the interior chamber. An electronic control unit 60 is coupled to the stator assembly and has an upper surface 62 in communication with the interior chamber. A fluid flow path structure 64 is constructed and arranged to permit fluid to pass from an inlet in the stator assembly and enter the interior chamber so that the rotor assembly, the windings, and the portion of said stator core are submerged in the fluid for cooling the rotor assembly, the windings, and the portion of the stator core. Fluid also contacts the upper surface of the electronic control unit to cool the electronic control unit. Fluid isolating structure 74' prevents fluid from contacting an end 81 of the windings.

대표청구항 ▼

[ What is claimed is:] [1.] A brushless electric motor comprising:a stator assembly defining an interior chamber, said stator assembly including a stator core and windings, said windings and at least a portion of said stator core being in open communication with said interior chamber,a rotor assembl

[ What is claimed is:] [1.] A brushless electric motor comprising:a stator assembly defining an interior chamber, said stator assembly including a stator core and windings, said windings and at least a portion of said stator core being in open communication with said interior chamber,a rotor assembly in said interior chamber,an electronic control unit coupled to said stator assembly and having an upper surface in communication with said interior chamber,a fluid flow path structure constructed and arranged to permit fluid to pass from an inlet in said stator assembly and enter said interior chamber so that said rotor assembly, said windings, and said portion of said stator core are submerged in the fluid for cooling said rotor assembly, said windings, and said portion of said stator core, and fluid contacts said upper surface of said electronic control unit to cool the electronic control unit, anda fluid isolating structure preventing fluid from contacting a winding end of said windings.