POWERING CIRCUIT FOR AN ELECTRIC MOTOR BRUSH, IN PARTICULAR OF A MOTOR VEHICLE STARTER

摘要

The invention concerns a circuit of the type comprising at least one upstream cut-out metal conductive element (46) with solid cross-section substantially constant over its entire length and a downstream cable (18, 30) to a brush (20), and means forming a circuit breaker including a segment (30) of specific reduced cross-section of the conductor belonging to said downstream cable (18, 30), which break the circuit by melting said segment when the current is too strong. The invention is characterized in that said upstream conductive element (46) comprises a portion (52) with reduced cross-section for reducing thermal conduction phenomena through said upstream conductive element (46). The invention is applicable to a motor vehicle starter.