The automobile starter can convert the battery's electrical energy into mechanical energy, and drive the engine flywheel to start the engine. The motor is the main component inside the starter. Its working principle is the energy conversion process based on the Ampere's law that we encounter in junior high school physics. That is, the energized conductor is subjected to the force in the magnetic field. Today Xiao Bian has collected the common faults and repair methods for automotive starter circuits for everyone:
(1) Press the start button, the starter will make a noise, and the engine will not catch fire. Here are several situations to judge:
1 The sound generated by the starter is not so loud. At the moment when the circuit is turned on, the brightness of the warning light is darkened, which indicates that the circuit voltage has large fluctuations. It is necessary to check whether the battery is losing power, and whether its pole is connected perfectly.
2 The humming sound is very loud, the brightness of the warning lamp light does not change, this phenomenon should be checked and opened the starter. The key position in the auxiliary excitation circuit contact connection point. Here contact is not good. It is necessary to cause the starter gear and ring gear Hard collisions.
3 The engine has a tendency to turn. Excessive air bubbles are generated in the battery's acid. This is a sign of overload on the starter. After the engine has been overhauled, it must be tested by hand before it is cranked. It is not very heavy to use the starter. After the occurrence of a failure of the engine-heating and holding shaft, the operator must start the engine by force and cause the starter to be scrapped and the battery to burst.
(2) Press start button, starter does not work. First check whether the transmission is in neutral position. If the neutral position is to be set in the gear, if the starter still does not work in the neutral state, check the neutral switch, which is installed in the gear shift capstan At this point, the quality of the product can be checked by a sense resistor method. When there is a gap, the two pins communicate with each other. In the gear position, the two pins are not connected, indicating that the switch is good and needs to be adjusted correctly. It can also short-circuit the two pins. If the circuit is normal, the switch is broken or the adjustment is incorrect. If not, continue to check the other aspects of the circuit. The ignition switch and the start button can also be tested by the short circuit method, but the contact time must be controlled to prevent the starter from being caused. damage.
The last thing to remind everyone is that because the car starter is designed according to the requirements of short-time work, the current through the starter windings during operation is very high (usually a few hundred amps). If you continue to start again, you should stop for 10-15s. If you check the circuit of the starter for no less than three consecutive failures, you should stop for more than 5 minutes. Otherwise, it is not only harmful to the battery, but also can cause high temperature due to large current flowing through the magnetic field coil and the armature coil for a long time, destroying the insulation of the coil and causing the starter to burn.
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