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High performance brushless motor and drive for an electrical vehicle motorization

  • US 6,630,764 B1
  • Filed: 02/01/2002
  • Issued: 10/07/2003
  • Est. Priority Date: 04/01/1999
  • Status: Expired due to Term
First Claim
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1. 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;

    A′

    , C, C, B′

    , B′

    , A, A, C′

    , C′

    , B, B, and A′

    resulting in reduced torque ripple without any slot or magnet skewing.

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