High voltage induction motor without ladder insulation between motor windings and method of construction therefor

A permanent split capacitor induction motor having an input voltage at and above 440 volts, comprising:

• a rotor;
• and
• a stator assembly, said stator assembly including a core of magnetic material, said core being constructed from a plurality of individual laminations, said laminations having a central opening in them, and a plurality of receptacles extending radially outwardly from said central opening, the receptacles defining winding receiving, closed bottom slots and the central opening defining a rotor receiving bore, insulation means along at least the closed bottom portion of said slots, windings in said slots, said windings including a main winding and an auxiliary winding, said main winding comprising a first winding part and a second winding part, each of said first and said second main winding parts comprising a plurality of wire coil sets constructed from a number of individual wire turns, said wire turns being constructed from magnet wire, said magnet wire including an insulation film about an electrical conductor, said first and said second main winding parts being connected in series to one another, said auxiliary winding being connected in parallel with said first main winding part, said auxiliary winding being positioned in said slots adjacent the coil sets of the main winding part with which it is electrically connected, said auxiliary winding and said first main winding part being placed adjacent one another in said slots so that at least some wire turns of said main and said auxiliary windings are continuous with one another along the insulation coating of the magnet wire from which said windings are constructed, said auxiliary winding being separated from said second main winding part by said first main winding part.