System and method for stator construction of an electric motor
OwnerRobert Rossinventor
Life of this patent
Estimating the term…
Abstract
A system and method to reduce core loss in the stator of an electric motor by first preparing laminations of the stator and/or rotor in a water jetting operation, punching or stamping operation, laser cutting operation, or similar manufacturing operation, and then subjecting the laminations to a temperature treatment in a manner such that, upon assembly into a stator and/or rotor of an electric motor and operated within expected parameters, core loss is reduced. The system and method subjects the laminations to a cold bath preferably consisting of liquid nitrogen, after stamping but preferably prior to assembly, and then stacking the laminations together for assembly as a stator and/or rotor of an electric motor.
Claims17
A method to reduce core loss in an electric motor by preparing laminates of at least one of the stator and rotor such that, upon assembly into a stator and rotor of an electric motor and operated within expected parameters, core loss is reduced, comprising:
- forming at least one of a stator and a rotor laminate;
- subjecting the at least one stator and rotor laminate to a reduced temperature bath;
- and
- assembling a plurality of the stator and rotor laminates into a stator and rotor of an electric motor, respectively, such that upon operation, the electric motor exhibits reduced core loss,
- wherein the at least one stator and rotor laminate is subjected to the reduced temperature by submersion of the laminate into a cold bath,
- wherein the at least one stator and rotor laminate remains submersed in the cold bath for a period of up to 8 hours and is then removed in a reverse process until completely free of the cold bath, and
- wherein the at least one stator and rotor laminate is held free of the cold bath and allowed to substantially reach room temperature before assembly.
A method to reduce core loss in laminates of an electric motor, comprising:
- forming at least one of a stator or a rotor laminate;
- subjecting the laminate at a room temperature of between 293 K and 298 K (68 F and 77 F), to a reduced temperature bath maintained between 63 K and 77.2 K (−346 F and −320 F) at normal atmospheric pressure;
- and
- assembling a plurality of laminates into an electric motor such that upon operation, the electric motor exhibits reduced core loss.
A method to reduce core loss in laminates of an electric motor, comprising:
- subjecting at least one of a stator or a rotor laminate at a room temperature of between 293 K and 298 K (68 F and 77 F), to a reduced temperature bath maintained between 63 K and 77.2 K (−346 F and −320 F) at normal atmospheric pressure;
- and
- assembling a plurality of laminates at a room temperature of between 293 K and 298 K (68 F and 77 F) into an electric motor such that upon operation, the electric motor exhibits reduced core loss.
Dependencies are inferred from the claim text.