Patent ID: 6630764
Filing Date: 2003-10-07
Classification: B60L,H02K,Y02T

Abstract:
A brushless DC motor/generator (10) comprising; a cylindrical outer rotor (19) with twenty two poles (20) constructed with segments of permanent magnet material alternatively magnetized north and south, a stator core (8) of ferromagnetic material spaced inwardly of said rotor and defining a magnetic clearance gap (9) there between, said stator core having twenty-four slots (18) and defining teeth (23) between said slots (18), a three phase winding with coils (7) of insulated wire being wound around the teeth, an electronic supply (11) including a power electronics system and a current control circuit means (14) to control the torque of said motor (10) and therefore its arresting force for braking a wheel (53) of devices on which people are displaced by said DC motor motorizing said wheel, characterized in that there is one coil per slot with predetermined connection patterns: Aâ€², C, C, Bâ€², Bâ€², A, A, Câ€², Câ€², B, B, and Aâ€² resulting in reduced torque ripple without any slot or magnet skewing.