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Title: Soft-commutated direct current motor

Abstract

A method and circuit is disclosed for soft-commutation of a direct current (DC) motor. An attenuation circuit is connected through auxiliary brushes A, A', B and B' to the commutator (16) to drain circuit from successive armature coils (15) before the main brushes (27, 28) disconnects from each of the coils (15). This prevents the spark generation that normally occurs in conventional DC motors. The attenuation circuit may also be connected before energization of the coil (15) for a soft turning on operation.

Inventors:
 [1]
  1. Oak Ridge, TN
Issue Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
OSTI Identifier:
872412
Patent Number(s):
5929579
Assignee:
Lockheed Martin Energy Research (Oak Ridge, TN)
Patent Classifications (CPCs):
H - ELECTRICITY H02 - GENERATION H02K - DYNAMO-ELECTRIC MACHINES
DOE Contract Number:  
AC05-96OR22464
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
soft-commutated; direct; current; motor; method; circuit; disclosed; soft-commutation; dc; attenuation; connected; auxiliary; brushes; commutator; 16; drain; successive; armature; coils; 15; main; 27; 28; disconnects; prevents; spark; generation; normally; occurs; conventional; motors; energization; coil; soft; operation; direct current; dc motor; current motor; normally occur; drain circuit; /318/310/

Citation Formats

Hsu, John S. Soft-commutated direct current motor. United States: N. p., 1999. Web.
Hsu, John S. Soft-commutated direct current motor. United States.
Hsu, John S. Fri . "Soft-commutated direct current motor". United States. https://www.osti.gov/servlets/purl/872412.
@article{osti_872412,
title = {Soft-commutated direct current motor},
author = {Hsu, John S},
abstractNote = {A method and circuit is disclosed for soft-commutation of a direct current (DC) motor. An attenuation circuit is connected through auxiliary brushes A, A', B and B' to the commutator (16) to drain circuit from successive armature coils (15) before the main brushes (27, 28) disconnects from each of the coils (15). This prevents the spark generation that normally occurs in conventional DC motors. The attenuation circuit may also be connected before energization of the coil (15) for a soft turning on operation.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {1}
}

Patent:

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