Patent ID: 6040650
Filing Date: 2000-03-21
Classification: H02K

Abstract:
A stator for use with a rotor that contains permanent magnets:said stator having a center and an axial thickness and a radial extent;a plurality of overlapping coils spaced and extending arcuately around said center of said stator;said coils being formed of electrical conductors with each having an inner section and an outer section and two radial sections that extend between said inner section and said outer section with an open area formed within said inner, outer and radial sections;said coils each having an axial thickness;each said radial section having an active sector along a length of said radial section that has said permanent magnets of said rotor passed adjacent to it;said overlapping coils including a first coil and a second leading coil and a third trailing coil;one said active sector of said radial section of said second leading coil and one said active sector of said radial section of said third trailing coil fit within said open area of said first coil with said active sectors of said first coil and said second leading coil and said third trailing coil each having essentially the same said axial thickness and wherein said overlapped first coil and second leading coil and third trailing coil active sectors combined together have an axial thickness essentially equal to said axial thickness of each of said radial sectors of each of said coils;said electrical conductors forming said active sectors of said radial sections are tapered so as to be wider as said conductors extend outwardly from said stator center.