What is the problem when the three-phase AC synchronous generator does not generate electricity?

How does a three-phase alternator work?

The three-phase AC generator consists of two parts: the rotor and the stator. The rotor is an electromagnet, which consists of a magnetic core, windings, and collector rings. The stator consists of a stator core, windings, and a housing.

The operation process of a three-phase AC generator is as follows:

1. Cause the rotor to rotate: Use external energy, such as gasoline or steam, to drive the rotor to rotate. During the rotation of the rotor, the magnetic core continuously changes the position of the magnetic poles, generating an alternating magnetic field.

2. Generate induced electromotive force: Due to the rotation of the rotor, the magnetic field changes continuously, which will induce electromotive force in the stator coil.

3. Generation of current: Due to the existence of electromotive force, current begins to flow in the stator coil, forming alternating current.

4. Generate three-phase alternating current: The stator contains three coils, which are distributed at 120 degrees. Therefore, the generated alternating current is also three-phase alternating current. According to the phase difference of the three-phase alternating current, we can obtain stable and effective power.

5. Output electric energy: Through the output terminal, the electric energy is transmitted to the power grid and supplied to consumers.

To summarize, a three-phase AC generator is a power generation device that generates an alternating magnetic field through the rotation of the rotor, induces an electromotive force in the stator coil, and generates an electric current that appears as three-phase alternating current.

What is the problem when the three-phase AC synchronous generator does not generate electricity?

The failure of a three-phase AC synchronous generator to generate electricity may be caused by a variety of problems, the following are a few:

1. Power input problem: If the generator does not have enough power input, it will not be able to produce current. This may be caused by the engine losing power or mechanical parts being damaged.

2. Excitation problem: The generator needs external excitation current to generate current. Insufficient or non-existent excitation current may cause the generator to not generate electricity. Excitation current that is too small or power interruption may cause the generator output voltage to be unstable.

3. Fault problem: Faults in the internal components of the generator, such as the rotor, stator, and winding, may cause the generator to fail to generate electricity. In addition, failure of protective devices, short circuits, phase loss, and grounding may also be the reasons why the generator fails to generate electricity.

4. System problems: There may be problems with the coordination between the generator and the grid, such as unstable grid voltage, large frequency deviation, or whether the generator is synchronized with the grid.

5. Control problem: The generator control system may fail, resulting in failure to generate electricity. For example, electronic controller failure, control signal transmission failure, etc.

It is necessary to find the problem according to the specific situation and make appropriate repairs, replacements or adjustments to ensure that the generator can generate electricity normally.