The working principle of starting motor, 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 to say, DC motor is responsible for rotation. The transmission mechanism makes the gear driven by the starting motor mesh into the flywheel ring gear, transmits the torque of the starting motor DC motor to the engine flywheel, drives the engine crankshaft to rotate, and drives the engine components to work until the engine starts. After the engine is started, the starter is automatically disengaged from the gear ring. The electromagnetic switch is responsible for connecting and cutting off the circuit between the DC motor and the battery. According to the control mechanism, 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 should not be too long, generally speaking, about 10 seconds is the best. The time interval between two starts of starting motor should be about 1 minute, preferably more than 1 minute. If the engine cannot be started for three consecutive times, check the engine, battery, circuit line and wiring point. For the starting motor without over-current protection device, if it can not be started for three consecutive times, the starting motor should stop working at this time, because the starting current is too large, and it works for a long time. At this time, the starting motor will overheat due to the over current. If you continue to start the motor by force, it is very likely that the motor will burn down. After replacing the starting motor, attention should be paid to the positive and negative line contact points. It is better to polish the contact points and install them firmly. Otherwise, the engine will not start when it is hot.
Starting motor maintenance, to have a good start habits, starting generally do not exceed 5 seconds, continuous start time gap of more than 15 seconds to start, the third time in a row can not start normally, after a minute to start. Do not start too long in order to avoid burning starter (that is, motor). Check the battery regularly, so that the battery can start the engine under 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 car owners. At a certain time, we must go to a professional maintenance point for inspection. Clean the engine compartment regularly to prevent dust, oil and water from corroding and aging the wiring harness of the engine compartment, so that the starter interface can not be contacted or rusted, and the electrical conductivity is not good enough to affect the normal start of the engine. It is not necessary under normal conditions. If you feel that the starter has teeth or weak start, go to the repair shop for maintenance.
