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Operating principle of starting motor

The starting motor is generally composed of transmission mechanism, control mechanism (electromagnetic switch) and DC motor. The working principle of the starting motor is to convert the electric energy of the battery into mechanical energy, so as to drive the flywheel on the engine to rotate, so as to realize the starting of the engine. DC motor produces electromagnetic torque, that is, DC motor is responsible for rotation. The transmission mechanism engages the gear driven by the starting motor into the flywheel ring gear, transmits the torque on the DC motor of the starting motor to the engine flywheel, drives the engine crankshaft to rotate, and drives all parts of the engine to work cycle until the engine starts. After the engine starts, make the starter automatically disengage the ring gear. The electromagnetic switch is responsible for connecting and cutting off the circuit between the DC motor and the battery. According to the control mechanism, the starting motor can be divided into direct control type and electromagnetic control type. Now most of our common starting motors are electromagnetic control type.

The starting time of the starting motor shall not be too long. Generally speaking, it is best to start the motor in about 10 seconds. The time interval between two starts of the starting motor is about 1 minute, preferably greater than 1 minute. If it cannot be started for three consecutive times, check the engine, battery, circuit line and wiring point. For the starting motor without overcurrent protection device, if it cannot be started for three consecutive times, stop the starting motor at this time, because the starting current is too large and works for a long time. At this time, the starting motor will overheat due to excessive current. If you continue to forcibly start the motor, the motor is likely to burn out. After replacing the starting motor, pay attention to the contact points of the positive and negative lines. It is best to polish the contact points and install them firmly, otherwise the engine will not start when the engine is hot.

The maintenance of the starting motor should have a good starting habit. Generally, the starting time should not exceed 5 seconds. It can be started after more than 15 seconds of continuous starting time. It can not be started normally for the third time, and it can be started after one minute. Do not start continuously for too long to avoid burning the starter (i.e. motor). Check the battery regularly so that the battery can start the engine at normal capacity and power. Car starting batteries are maintenance free, and their service life is between one and a half to two years. The service life depends on the frequency of the owner's use of the car. At a certain time, you must go to a professional maintenance point for inspection. Clean the engine compartment regularly to prevent dust and oil and water from corroding and aging the engine compartment harness, so that the starter interface can not be contacted or rusted, and the poor conductivity affects the normal start of the engine. It is not necessary under normal circumstances. If you feel that the starter has teeth and weak start, go to the maintenance shop for maintenance.

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Operating principle of starting motor

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