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BRUSHLESS DIRECT CURRENT ELECTRIC MOTOR WITH REDUCED COGGING TORQUE AND PRODUCTION METHOD THEREOF

  • US 20200136486A1
  • Filed: 10/28/2019
  • Published: 04/30/2020
  • Est. Priority Date: 10/29/2018
  • Status: Active Grant
First Claim
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1. A brushless direct current motor (1), comprising a rotor (2) made up of at least one permanent magnet, and a stator (3) having at least three partitions (16;

  • 160) radially extending from a circular based cylindrical main body (17;

    170), said partitions (16;

    160) together defining at least two volumes for receiving at least three coils generating a magnetic field, each volume being closed by a wall, formed by a portion of the body (17;

    170), connecting said partitions (16;

    160), and said wall comprising, on the face thereof oriented toward the rotor (2), at least one magnetic restriction zone, characterized in that the magnetic restriction zone is formed by at least one zone (18, 19;

    180) that is thinner than the wall, and in that a sleeve (4) surrounds the stator (3) and the rotor (2), and in that said sleeve (4) comprises at least one deformation zone formed by cutouts (11) and adapted to maintain the external geometrical configuration of the sleeve (4) when mounting the constituent elements of the motor (1).

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