Pole-phase modulated toroidal winding for an induction machine

A stator for an induction machine for a vehicle, said vehicle having an engine and an electrical system, said stator comprising:

• a cylindrical core having a longitudinal axis, inner and outer peripheries, first and second end faces, a plurality of inner slots extending longitudinally along said inner periphery between said first and second end faces, and a plurality of outer slots extending longitudinally along said outer periphery between said first and second end faces, each of said outer slots being associated with several adjacent inner slots;
• and
• a plurality of toroidal coils wound about said core and laid in said inner and outer slots, each of said toroidal coils occupying a single inner slot and being laid in said associated outer slot to minimize distance said coils extend from said end faces and thereby minimize length of said induction machine, said toroidal coils being configured for an arbitrary pole phase modulation wherein said coils are configured with a first arbitrary number of phases and poles for cranking said engine and a second arbitrary number of phases and poles for alternator duty for charging said electrical system, said first arbitrary number of phases being greater than said second arbitrary number of phases to produce starting torque, and said second arbitrary number of poles being greater than said first arbitrary number of poles to produce smooth operation.

A stator for an induction machine, comprising:

• a cylindrical core having a longitudinal axis, inner and outer peripheries, first and second end faces, a plurality of inner slots extending longitudinally along said inner periphery between said first and second end faces, and a plurality of outer slots extending longitudinally along said outer periphery between said first and second end faces, each of said outer slots being associated with several adjacent inner slots, the total cross-sectional area of said outer slots generally equaling the total cross-sectional area of said inner slots;
• a plurality of toroidal coils wound about said core and laid in said inner and outer slots, each of said toroidal coils occupying a single inner slot and being laid in said associated outer slot to thereby minimize distance said coil extends from said end faces;
• and
• an adapter ring circumferentially positioned about said stator and having a coolant channel for receiving and circulating a fluid to dissipate heat from said core and coils.