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Automatic starting motor for automobiles "refers to the automatic starting motor of a car, and the following is the relevant information: working principle The automatic starting motor of a car is mainly composed of three parts: a DC motor, a transmission mechanism, and an electromagnetic switch. When the starter motor is powered on, the DC motor operates based on Ampere's law, which states that the energized conductor is subjected to force in a magnetic field, generating electromagnetic torque that is transmitted to the engine crankshaft through the transmission mechanism, causing the engine to start rotating. After the engine is started, the transmission mechanism will automatically disengage the ring gear to avoid interference between the starter motor and the engine flywheel. Common faults and causes Electromagnetic switch malfunction: Issues such as contact erosion, poor contact, coil short circuit or open circuit of the electromagnetic switch can affect the normal operation of the electromagnetic switch, resulting in the inability or weakness of the starter motor to start. Carbon brush wear: Carbon brush is a component in contact with the commutator in the starter motor, and its main function is to transmit current. If the carbon brush is severely worn, it will cause poor contact between the carbon brush and the commutator, generating electric sparks and affecting the normal operation of the starter motor. Short circuit or open circuit of armature winding: The armature