Patent ID: 8154167

Claim:
An induction motor, comprising: a stator defining a stator bore, said stator comprising: a stator yoke having a stator yoke thickness; and a plurality of stator teeth extending radially inward toward a stator center axis, wherein said plurality of stator teeth have a common stator tooth length, wherein each stator tooth defines a pair of stator tooth side surfaces, and wherein said pair of stator tooth side surfaces for each stator tooth of said plurality of stator teeth are parallel to one another; a plurality of stator slots, wherein each of said plurality of stator slots is interposed between a corresponding pair of stator teeth; a first winding layer contained within at least a first subset of said plurality of slots, wherein said first winding layer is comprised of a first set of six coil groups, wherein said first set of six coil groups is comprised of a first and second first phase coil group, a first and a second second phase coil group, and a first and a second third phase coil group; a second winding layer contained within at least a second subset of said plurality of slots, wherein said second winding layer is comprised of a second set of six coil groups, wherein said second set of six coil groups is comprised of a third and a fourth first phase coil group, a third and a fourth second phase coil group, and a third and a fourth third phase coil group; and wherein said first and second first phase coil groups comprise a first pole pair of said first phase, wherein said third and fourth first phase coil groups comprise a second pole pair of said first phase, wherein said first and second second phase coil groups comprise a first pole pair of said second phase, wherein said third and fourth second phase coil groups comprise a second pole pair of said second phase, wherein said first and second third phase coil groups comprise a first pole pair of said third phase, and wherein said third and fourth third phase coil groups comprise a second pole pair of said third phase; and a rotor mounted within said stator bore, said rotor comprising: a rotor yoke having a rotor yoke thickness; a plurality of rotor teeth extending radially away from a rotor center axis, wherein said plurality of rotor teeth have a common rotor tooth length, wherein each rotor tooth defines a pair of rotor tooth side surfaces, wherein said pair of rotor tooth side surfaces for each rotor tooth of said plurality of rotor teeth are parallel to one another; and a plurality of rotor slots, wherein each of said plurality of rotor slots is interposed between a corresponding pair of rotor teeth, wherein a top region of each rotor slot that is proximate to said stator is closed by a rotor tooth bridge.