DE2357127

New small size DC motors comprising as a spark suppressing element a commutator composed of a cylinder-shaped oxide sintered body having a remarkably stable volt-ampere characteristic as a parent body of the commutator and a plurality of metal or alloy pieces as the commutator segments are provided....

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Bibliographic Details
Main Authors ONO, MIKIYA, TACHIBANA, KANICHI, NISHIOKA, MICHIHIRO
Format Patent
LanguageEnglish
Published 04.10.1979
Edition2
Subjects
BASIC ELECTRIC ELEMENTS
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
CURRENT COLLECTORS
DYNAMO-ELECTRIC MACHINES
ELECTRICITY
GENERATION
LINE CONNECTORS
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Summary:New small size DC motors comprising as a spark suppressing element a commutator composed of a cylinder-shaped oxide sintered body having a remarkably stable volt-ampere characteristic as a parent body of the commutator and a plurality of metal or alloy pieces as the commutator segments are provided. The spark suppressing element utilizes an electric barrier existing at the contact surface between the oxide sintered body and the metal or alloy pieces, and can suppress the generation of spark between the commutator and the brush completely, thereby making the motor long-lived and also noiseless. Further, this element is easily to be attached and inexpensive in manufacturing cost.
Bibliography:Application Number: DE19732357127