The linear dc motor is not well known. However, for certain applications, the linear dc motor compares very favorably with the more publicized linear induction motor. The difficulties in controlling the speed of conventional induction motors are well known, as is the ease with which the speed of conventional dc motors can be controlled. The heatsink qualities of the linear dc motor are excellent. With the moving field fixed armature system, the armature current flows for a short period of time through those armature conductors embraced by the brushes. The armature core acts as an excellent heatsink, and the heat produced is left behind on the track. For a given thrust, the watts/newton ratio of the linear dc motor is far superior to that of the linear induction type. The big disadvantage of the linear dc type is the usual need for a wound armature and brushes. For obvious reasons, it would not be considered as a rival to the linear induction motor for traction or operation over considerable distances.

  • Availability:
  • Corporate Authors:

    Institute of Elect Engrs, Publishing Department

    P.O. Box 8, Southgate House
    Stevenage S91 1HG, Heartshire,   England 
  • Authors:
    • Brough, J J
  • Publication Date: 1974-9-5

Media Info

  • Features: References;
  • Pagination: p. 628-632
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00083918
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: May 1 1975 12:00AM