Patents Assigned to Motors Acquisition Corp.
  • Patent number: 6181035
    Abstract: A brushless electric motor has a rotor carrying a plurality of permanent magnet elements uniformly spaced apart and a stator armature separated from the rotor by a circumferential air gap of uniform thickness and having a plurality of uniform slots provided therein at equally spaced intervals and facing the air gap. The cogging torque associated with the motor is reduced by bevelling the inner corners of the magnet elements and spacing the magnet elements apart at a desired spacing so as to provide a desired distribution for the density of magnetic energy stored in the air gap. Magnetic flux conductors may also be disposed on the magnet elements to affect the distribution of the density of the magnetic energy stored in the air gap.
    Type: Grant
    Filed: September 29, 1994
    Date of Patent: January 30, 2001
    Assignee: Motors Acquisition Corp.
    Inventor: Sebastiano Acquaviva