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Composite-type electromagnet and radial magnetic bearing

  • US 6,563,244 B1
  • Filed: 07/27/2000
  • Issued: 05/13/2003
  • Est. Priority Date: 07/28/1999
  • Status: Expired due to Fees
First Claim
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1. A composite-type electromagnet comprising:

  • an electromagnet having a controlling coil wound around an electromagnet core formed of a magnetic material;

    a biasing permanent magnet in contact with the electromagnet core so that only a minute gap exists at a junction between the electromagnet core and the permanent magnet; and

    a filling material having a high permeability and a high saturation magnetic flux density disposed in the minute gap.

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