GENERALIZED COMMUTATION THEORY OF LARGE DC MACHINES

The present paper shows the following facts using the commutation equation. (1) The non-spark zone is bounded by the critical no-spark curve of the contact voltage at the head edge of the brush. The no-spark zone vanishes if the current density at the tail edge of the bush exceeds a critical value. (2) The non-spark zone can be calculated even if the contact voltage characteristics of the brush are linear. (3) The armature current can always be commulated linearly even if two or more coils are commutated simultaneously by one brush. (4) When one brush short- circuits two or more coils simultaneously, the center line of the no-spark is expressed in terms of a polynomial of the electromagnetic coupling factor between two adjacent commutated coils. Its position cannot be determined until the commutation equation is solved.

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  • Corporate Authors:

    Scripta Publishing Corporation

    Investment Building
    Washington, DC  United States  20005
  • Authors:
    • MATSUDA, T
  • Publication Date: 1974-9

Media Info

  • Features: References;
  • Pagination: p. 82-90
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00129091
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Feb 4 1976 12:00AM