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Reduction Starter
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Construction
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| 4. |
Brush and brush holder
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The brushes are pressed against the armature commutator by the brush springs, allowing the current to flow from the coil to the armature in a fixed direction. The brushes are made of copper-carbon, which has excellent conductivity and abrasion resistance characteristics. The brush springs maintain the brushes in contact with the armature commutator and assist in stopping the armature revolving after the engine starts due to the frictional resistance of the brushes.
HINT:
Weak brush springs or worn brushes may lead to insufficient electrical contact between the brushes and the segments of the commutator. This will result in excessive electrical resistance at the contact points and will reduce the supply of current to the motor, impeding torque. |
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