CN202488313U - Harmonic Brushless Alternator - Google Patents

Abstract

The utility model discloses a harmonic brushless alternating current power generator. The harmonic brushless alternating current power generator comprises a main power generator and an alternating current exciter, wherein the main power generator comprises a main stator and a main rotor, a main stator winding and a harmonic winding are arranged on the main stator, a main rotor winding is arranged on the main rotor, the harmonic winding is electrically connected with an automatic voltage regulator, and the output end of the main stator winding is connected to the detection end of the automatic voltage regulator; and the alternating current exciter comprises an exciter stator and an exciter rotor, an exciter stator winding is arranged on the exciter stator, the harmonic winding is electrically connected to the exciter stator winding, an exciter rotor winding is arranged on the exciter rotor, the exciter rotor winding is electrically connected to the input end of a rotating rectifier, and the output end of the rotating rectifier is electrically connected to the main rotor winding. The harmonic brushless alternating current power generator disclosed by the utility model can keep output voltage stable and has strong on-load starting capability.

Description

Harmonic Brushless Alternator

technical field

The utility model relates to the technical field of generators, in particular to a harmonic brushless alternator.

Background technique

With the continuous development of domestic fringe areas and the increase of tonnage of domestic and foreign ships, the starting load capacity of generators is required to be higher and higher. For example, motors for starting oilfields, motors for stone crushers, and motors for starting air compressors, refrigerators and sand dredgers for domestic and foreign ship operations are all started with load. At present, domestic brushless alternators can only work at the rated speed, start the motor without load, and cannot start the motor with load. If the motor is started with load, the generator, motor and various electrical appliances will be burned out, causing serious consequences.

Utility model content

The technical problem to be solved by the utility model is to provide a harmonic brushless alternator with strong starting capability under load.

For solving the problems of the technologies described above, the technical solution of the utility model is:

Harmonic brushless alternators, including:

The main generator, the main generator includes a main stator and a main rotor, the main stator is provided with a main stator winding and a harmonic winding, the main rotor is provided with a main rotor winding, and the harmonic winding is electrically connected to an automatic voltage regulator, the output terminal of the main stator winding is electrically connected to the detection terminal of the automatic voltage regulator;

An AC exciter, the AC exciter includes an exciter stator and an exciter rotor, the exciter stator is provided with an exciter stator winding, the harmonic winding is electrically connected to the exciter stator winding, and the exciter An exciter rotor winding is provided on the rotor, the exciter rotor winding is electrically connected to the input end of the rotating rectifier, and the output end of the rotating rectifier is electrically connected to the main rotor winding.

Preferably, the main stator is further provided with a fundamental winding connected in series with the harmonic winding.

Preferably, the output end of the main stator winding is also provided with a paralleling device.

After adopting above-mentioned technical scheme, the beneficial effect of the utility model is:

Since the main stator is provided with a harmonic winding, the harmonic winding is electrically connected to an automatic voltage regulator, the output end of the main stator winding is electrically connected to the detection end of the automatic voltage regulator, and the AC exciter includes an exciter A stator and an exciter rotor, the exciter stator is provided with an exciter stator winding, the harmonic winding is electrically connected to the exciter stator winding, the exciter rotor is provided with an exciter rotor winding, and the excitation The machine rotor winding is electrically connected to the input of the rotating rectifier. In this way, using the inherent third harmonic magnetic field in the air gap magnetic field of the generator, after the generator is driven, the harmonic winding will send the voltage induced by the 150HZ harmonic in the winding to the stator winding of the exciter through the automatic voltage regulator, and the excitation The stator of the motor generates a magnetic field, and the rotor winding of the exciter induces an alternating current in the magnetic field, which is rectified by a rotating rectifier and then directly fed to the main rotor winding of the main generator, which greatly improves the starting capacity of the generator under load. The change of the output voltage of the main stator winding is detected by the automatic voltage regulator, so as to follow and adjust the voltage sent to the exciter stator, so that the output voltage of the main stator winding can be kept constant, so as to protect the normal power consumption facilities, and will not be damaged due to shortage Overvoltage or overvoltage will burn electrical facilities.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

Fig. 1 is the structural representation of the utility model harmonic brushless alternator;

Fig. 2 is a schematic diagram of the principle of the harmonic brushless alternator of the present invention;

In the figure: 1. Main stator; 2. Main stator winding; 3. Main rotor; 4. Main rotor winding; 5. Exciter stator; 6. Exciter stator winding; 7. Exciter rotor; 8. Exciter rotor winding ; 9. Rotary rectifier; 10. Automatic voltage regulator; 11. Parallel device; 12. Disk resistance; 13. Harmonic winding.

Detailed ways

Referring to Fig. 1 and Fig. 2, the harmonic brushless alternator of the present utility model comprises main generator, and main generator comprises main stator 1 and main rotor 3, and main stator 1 is provided with main stator winding 2 and harmonic winding 13. The harmonic winding 13 is electrically connected to the automatic voltage regulator 10, the output terminal of the main stator winding 2 is electrically connected to the detection terminal of the automatic voltage regulator 10, and the main rotor winding 4 is provided on the main rotor 3; AC exciter, AC The exciter includes an exciter stator 5 and an exciter rotor 7, the exciter stator 5 is provided with an exciter stator winding 6, the harmonic winding 13 is electrically connected to the exciter stator winding 6, and the exciter rotor 7 is provided with an exciter rotor winding 8. The exciter rotor winding 8 is electrically connected to the input end of the rotating rectifier 9 , and the output end of the rotating rectifier 9 is electrically connected to the main rotor winding 4 . In this way, using the inherent third harmonic magnetic field in the air gap magnetic field of the generator, after the generator is driven, the harmonic winding 13 sends the voltage induced by the 150HZ harmonic in the winding to the stator winding of the exciter through the automatic voltage regulator 10 6. The stator 5 of the exciter generates a magnetic field, and the rotor winding 8 of the exciter induces an alternating current in the magnetic field, which is rectified by the rotating rectifier 9 and then directly fed to the main rotor winding 4 of the main generator, which greatly improves the starting capacity of the generator under load . The change of the output voltage of the main stator winding 2 is detected by the automatic voltage regulator 10, so as to follow and adjust the voltage delivered to the exciter stator winding 6, so that the output voltage of the main stator winding 2 can be kept constant, thereby protecting normal power consumption facilities, Electrical facilities will not be burned due to undervoltage or overvoltage. Of course, the adjustment of the voltage of the stator winding 6 of the exciter can also be realized manually. When adjusting manually, the main rotor winding 4 is connected in series with a disk resistance 12, and the disk resistance 12 is a variable resistor. By adjusting the voltage of the disk resistance 12 The resistance value is used to adjust the output voltage of the main stator winding 2 to keep it constant.

The main stator 1 is also provided with a fundamental winding (not shown) connected in series with the harmonic winding 13, the main stator winding 2 and the exciter stator winding 6 are 2/3 pitch windings; the voltage can be effectively eliminated The magnetic field heating problem caused by the third harmonic.

The output end of the main stator winding 2 is also equipped with a paralleling device 11; in this way, when a harmonic brushless alternator cannot meet the load power, several harmonic brushless alternators can be conveniently used through the paralleling device 11. The alternators are used in parallel to increase the output power.

The working principle of the harmonic brushless alternator of the utility model: the third harmonic magnetic field inherent in the air gap magnetic field of the generator is utilized, and after the harmonic brushless alternator is driven, the harmonic winding 13 converts the 150HZ harmonic The induced voltage is sent to the stator winding 6 of the exciter after being adjusted by the automatic voltage regulator 10. The stator 5 of the exciter generates a magnetic field, and the rotor winding 8 of the exciter induces an alternating current in the magnetic field, which is rectified by the rotary rectifier 9 and then directly Feed to the main rotor winding 4 of the main generator, thereby enhancing the magnetic field of the main rotor 3 of the main generator, the voltage of the main stator winding 2 is increased. This voltage building process is continuously cycled, and the brushless alternator builds up the rated voltage in a very short time. The automatic voltage regulator 10 detects the change of the output voltage of the main stator winding 2, follows and adjusts the voltage delivered to the exciter stator winding 6, so that the output voltage of the main stator winding 2 can be kept constant, thereby protecting the normal power consumption facilities and avoiding Electrical facilities will be burned due to undervoltage or overvoltage.

The above descriptions are examples of the best implementation modes of the present utility model, and the parts not mentioned in detail are the common knowledge of those skilled in the art. The protection scope of the present utility model is based on the content of the claims, and any equivalent transformation based on the technical inspiration of the present utility model is also within the protection scope of the present utility model.

Claims (3)

1. A harmonic brushless alternator, characterized in that it comprises: The main generator, the main generator includes a main stator and a main rotor, the main stator is provided with a main stator winding and a harmonic winding, the main rotor is provided with a main rotor winding, and the harmonic winding is electrically connected to an automatic voltage regulator, the output terminal of the main stator winding is electrically connected to the detection terminal of the automatic voltage regulator; An AC exciter, the AC exciter includes an exciter stator and an exciter rotor, the exciter stator is provided with an exciter stator winding, the harmonic winding is electrically connected to the exciter stator winding, and the exciter An exciter rotor winding is provided on the rotor, the exciter rotor winding is electrically connected to the input end of the rotating rectifier, and the output end of the rotating rectifier is electrically connected to the main rotor winding. 2. The harmonic brushless alternator according to claim 1, characterized in that a fundamental winding connected in series with the harmonic winding is provided on the main stator. 3. The harmonic brushless alternator according to claim 1 or 2, characterized in that, the output end of the main stator winding is also provided with a paralleling device.

Images