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Sectoral core for magnetic bearing

  • US 5,095,237 A
  • Filed: 01/10/1991
  • Issued: 03/10/1992
  • Est. Priority Date: 03/20/1990
  • Status: Expired due to Fees
First Claim
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1. A radial magnetic bearing comprising a rotor assembly secured to and rotating with rotating components of said bearing and a stator assembly secured to stationary components of said bearing, said assemblies having opposed peripheral surfaces separated by an air gap with said stator assembly comprising a plurality of pole pieces arranged in seriatim about the axis of rotation of said machine, each pole piece being formed as a discrete unit and having a pair of circumferentially spaced limbs, each of which terminates in a pole at the respective peripheral surface, said limbs being separated by a radial slot extending from an axially extending discontinuity in the peripheral surface that separates the poles and having a portion of greater circumferential width than said discontinuity, said pole pieces being segregated into at least two sectors, each containing an integral number of pole pieces, each sector having means associated therewith for generating and adjusting the magnetic flux in the pole pieces of its respective sector independently of the adjacent sectors and thereby adjusting the force exerted by the respective sector on said rotor assembly.

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