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Structural Principle Of Caterpillar Excavator Starter

Jun 08, 2022

The electromagnetic control mechanism of the starter of the electromagnetic control device is mainly composed of a suction coil, a holding coil, a driving lever, a starting switch contact piece, etc.

2) Operating principle of starter

The working principle of starter can be explained by the working principle of its main component DC motor.

DC motor is a device that converts electrical energy into mechanical energy. It is made based on the principle that live conductors are subjected to magnetic force in the magnetic field. Its working principle is shown in the figure:

Because the torque generated by one coil is too small and the speed is unstable, in fact, there are many coils wound around the armature of the motor, and the number of commutators increases with the increase of coils. Thus

Ensure to generate enough torque and stable speed.

Charging circuit

The charging circuit is mainly used to supply power to the electrical equipment of the whole vehicle and store the excess power into the battery. It mainly includes alternator, battery, battery relay, connecting harness, etc.