The importance of the generator is self-evident. All the power output on the excavator comes from the generator. However, once winter comes, the cold weather has a great impact on the operation of the excavator. It is often difficult to start and the battery has no power; Recently, a lot of diggers left messages saying that the excavator always has a strike due to battery loss. I don't know how to solve it; The editor told everyone that the engine and battery should be checked separately for this phenomenon.

If it is the problem of the battery, I believe that everyone knows the maintenance method of the battery in winter, so I will not repeat it too much here; For the generator fault, many people may not know how to solve it. Today, let's learn about the generator in detail and teach you how to solve the generator fault correctly.

Generally, the generator of excavator (vehicle-mounted) is claw-pole generator, which has a simple structure and is mainly composed of stator and rotor.

stator

The stator is composed of stator winding and stator core; The stator core is made of silicon steel sheets with good magnetic conductivity, and 36 slots are evenly distributed inside the core to place the stator coil; The stator coil is embedded in the stator slot, and there are many winding methods to form three-phase winding to generate three-phase AC or one-way AC.

Stator fault

When the stator coil breaks down, the generator will burn down in a short time due to "phase loss". If the individual coil burns down, it can be rewound according to the specifications of the original coil.

The magnetic pole of the rotor adopts claw pole structure, which is a claw pole installed on the shaft, with six poles; The magnetic yoke and excitation coil that generate magnetic field are installed in the claw pole, and the slip ring that supplies power to the excitation coil is installed on the rotor shaft. Another claw pole is installed on the rotor shaft to make the magnetic poles of the two claw poles staggered.

After installing the claw poles on both sides, the magnetic line of force will move along the claw pole. In order to see the direction of the magnetic line of force clearly, the magnetic line of force is changed to red, and the claw pole is changed to translucent; From the axial view, we can clearly see the direction of the magnetic lines of the six pairs of magnetic poles. For the heat dissipation of the generator, a fan should be installed on the shaft, which is a complete rotor.