How does a small starter motor start your car? The starter motor is generally located at this position below the engine. It is a device that converts the electrical energy of the battery into mechanical energy. The earliest cars were started by hand cranks with the help of human assistance, but this starting method is not only dangerous, but also time-consuming and laborious.
 

Working principle of the starter motor
The starter motor is generally composed of a transmission mechanism, a control mechanism (electromagnetic switch) and a DC motor. The working principle of the starter motor is to convert the electrical energy of the battery into mechanical energy, thereby driving the flywheel on the engine to rotate, thus starting the engine.
The DC motor generates electromagnetic torque, that is, the DC motor is responsible for the rotation work. The transmission mechanism makes the gear driven by the starter motor mesh with the flywheel ring gear, and transmits the torque on the starter motor DC motor to the engine flywheel, driving the engine crankshaft to rotate, and driving the engine components to work until the engine starts; after the engine starts, the starter automatically disengages the ring gear. The electromagnetic switch is responsible for connecting and disconnecting the circuit between the DC motor and the battery.
The starter motor can be divided into direct control type and electromagnetic control type according to the control mechanism. Most of the common starter motors we have now are electromagnetic control type. The starter motor should not be started for too long each time, generally speaking, about 10 seconds is the best. The time interval between two starts of the starter motor is about 1 minute, preferably more than one minute. If it fails to start three times in a row, the engine, battery, circuit line and wiring points should be checked. For a starter motor without an overcurrent protection device, if it fails to start three times in a row, the starter motor should be stopped at this time, because the starting current is too large, and long-term operation at this time will cause the starter motor to overheat due to excessive current; if the motor is forced to start, the motor is very likely to burn out.

E-mail :
ljy@BHRautoparts.com

Phone/Wechat：
+86 19865585220

Address：
No.32, Wanggang Industrial 2nd Road, Baiyun District, Guangzhou