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Lightweight high power electromagnetic transducer

  • US 5,004,944 A
  • Filed: 11/27/1987
  • Issued: 04/02/1991
  • Est. Priority Date: 12/23/1985
  • Status: Expired due to Term
First Claim
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1. A brushless, high-speed, high torque electric motor, comprising:

  • a housing;

    a shaft mounted on said housing to rotate relative thereto;

    a magnetic field-generating rotor secured to said shaft to rotate therewith, said rotor having a mounting disk connected to said shaft and one of (i) a first annular wall means having a first magnetic means mounted thereon for generating a magnetic flux and (ii) a second annular wall means comprising an outer annular wall and an inner annular wall both supported by said mounting disk and spaced radially apart to define an annular gap therebetween, said inner annular wall being spaced radially apart from said shaft, and a second magnetic means for generating a magnetic flux mounted on at least one of said inner annular wall and said outer wall; and

    an armature, for intercepting said magnetic flux, fixed to said housing, said armature comprising an annular member positioned to be disposed one of (i) radially adjacent said first annular wall means and (ii) at least partially within said gap between said inner annular wall and said outer wall of said rotor, said armature including (i) a plurality of spaced sections of electrical conductors, each section including a plurality of separate conductive wires insulated from each other and (ii) a plurality of magnetic flux carrying elements interposed between said sections of electrical conductors, each flux carrying element comprising a member pressed from highly magnetically permeable particles and a binder material for binding said particles together.

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