CN111614203A

CN111614203A - Intermediate frequency power supply

Info

Publication number: CN111614203A
Application number: CN202010461102.9A
Authority: CN
Inventors: 胡海鹏; 陈敬东; 朱锡辉; 刘雪姣
Original assignee: Kangfu Technology Co ltd
Current assignee: Kangfu Technology Co ltd
Priority date: 2020-05-27
Filing date: 2020-05-27
Publication date: 2020-09-01

Abstract

The invention discloses an intermediate frequency power supply, which belongs to the field of generators and comprises a base, a stator core with a winding and a rotor in running fit with the base; the stator core with the winding is provided with a motor stator coil and a generator stator coil; the rotor is provided with a motor rotor coil and a generator rotor coil; the motor stator coils are energized to drive the rotor to rotate such that the generator stator coils produce electrical energy. The motor and the generator share a stator core and a rotor core, so that the structure is compact; can conveniently turn into the intermediate frequency power supply of needs with the commercial power, convenient to use, and can also regard as the motor to use alone when need not changing the power.

Description

Intermediate frequency power supply

Technical Field

The invention relates to the field of generators, in particular to an intermediate frequency power supply.

Background

The 400Hz medium-frequency power supply is suitable for production lines, is used as a debugging test power supply, and can also be used for centralized power supply of plants and laboratories. The structure of the medium-frequency power supply mainly comprises a diesel engine, a medium-frequency generator and a bottom frame, and a motor, a medium-frequency generator and a bottom frame. The diesel engine, the generator and the underframe structure have large noise and large volume to occupy space. The motor, the generator and the underframe are large in size.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide an intermediate frequency power supply which is low in noise, small in size and light in weight; the utility model has the advantages of can conveniently convert the commercial power into intermediate frequency power, and can use as the motor alone.

In order to achieve the purpose, the invention adopts the following technical scheme:

the invention provides an intermediate frequency power supply which comprises a base, a stator core with a winding and a rotor in running fit with the base; the stator core with the winding is provided with a motor stator coil and a generator stator coil; the rotor is provided with a motor rotor coil and a generator rotor coil; the motor stator coils are energized to drive the rotor to rotate such that the generator stator coils produce electrical energy. The motor and the generator share a stator core and a rotor core, so that the structure is compact; can conveniently turn into the intermediate frequency power supply of needs with the commercial power, convenient to use, and can also regard as the motor to use alone when need not changing the power.

The present invention preferably further comprises an exciter stator fixed to the base, wherein an output end of the stator core with winding is electrically connected to an automatic voltage regulator, and the automatic voltage regulator is electrically connected to the exciter stator. The generator can automatically and effectively control the output voltage of the generator when generating electricity.

In a preferred embodiment of the present invention, the rotor further includes a main shaft, the main shaft is provided with an exciter rotor engaged with the exciter stator, the exciter rotor is electrically connected to a rotating rectifier, and the rotating rectifier is electrically connected to the generator rotor coil. The exciter provides excitation.

The invention preferably adopts the technical scheme that the pole number of the generator rotor coil is 8 times of that of the motor rotor coil. The pole number of the rotor coil of the generator and the pole number of the rotor coil of the motor are positioned on the same main shaft, so that 50HZ of the mains supply can be converted into a 400HZ intermediate frequency power supply.

In a preferred embodiment of the present invention, the rotor further includes a rotor core, the motor rotor coil is wound around an inner layer of the rotor core, and the generator rotor coil is wound around an outer layer of the rotor core. The rotor coils of the motor form a squirrel-cage structure by using parallel rings. The rotor of the generator can be conveniently off-line, the rotor coil of the motor is off-line firstly, and the rotor coil of the motor forms a squirrel-cage structure by using parallel rings.

The invention has the preferable technical scheme that a generator box body is arranged above the outer side wall of the machine base, and the automatic voltage regulator is positioned in the generator box body.

The invention has the beneficial effects that:

Drawings

Fig. 1 is a schematic diagram of an overall structure of an intermediate frequency power supply according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a stator segment configuration provided in an embodiment of the present invention;

FIG. 3 is a schematic diagram of an intermediate frequency power supply provided in an embodiment of the present invention;

FIG. 4 is a schematic view of a wound stator core provided in an embodiment of the present invention;

FIG. 5 is a schematic view of a rotor section provided in an embodiment of the present invention;

in the figure:

1. an exciter stator; 2. a rotating rectifier; 3. a rotor; 4. a generator box body; 5. an exciter rotor; 6. a machine base; 7. a stator core with windings; 8. a stator core; 9. a motor stator coil; 10. a generator stator coil; 11. a motor rotor coil; 12. a generator rotor coil; 13. a rotor core; 14. a main shaft; 15. an automatic voltage regulator.

Detailed Description

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

As shown in fig. 1-5, the intermediate frequency power supply provided in this embodiment includes a base 6, a stator core 8 with a winding, and a rotor 3 rotationally engaged with the base 6; the stator core 8 with the winding is provided with a motor stator coil 9 and a generator stator coil 10; the rotor 3 is provided with a motor rotor coil 11 and a generator rotor coil 12; the motor stator coils 9 are energized to drive the rotor 3 to rotate so that the generator stator coils 10 generate electrical energy. The motor and the generator share a stator iron core 8 and a rotor iron core 13, so that the structure is compact; can conveniently turn into the intermediate frequency power supply of needs with the commercial power, convenient to use, and can also regard as the motor to use alone when need not changing the power. When the motor stator coil 9 is electrified, the motor rotor coil 11 and the rotor core 13 can be driven to rotate, so that the generator rotor coil 12 rotates, the generator stator coil 10 generates current, the frequency of an output power supply can be changed by changing the number of poles of the generator and the motor, and the commercial power can be conveniently converted into a required intermediate frequency power supply.

In order to conveniently control the output voltage to be maintained at a stable value, the control device further comprises an exciter stator 1 fixed on the base 6, an automatic voltage regulator 15 is electrically connected to the output end of the wound stator core 8, and the automatic voltage regulator 15 is electrically connected with the exciter stator 1. The automatic voltage regulator 15 is connected to the UV terminal or UN terminal of the output terminal of the wound stator core 8. Preferably, a generator box 4 is arranged above the outer side wall of the machine base 6, and the automatic voltage regulator 15 is positioned in the generator box 4. The generator can automatically and effectively control the output voltage of the generator when generating electricity.

Further, the rotor 3 further includes a main shaft 14, an exciter rotor 5 matched with the exciter stator 1 is disposed on the main shaft 14, a rotating rectifier 2 is electrically connected to the exciter rotor 5, and the rotating rectifier 2 is electrically connected to the generator rotor coil 12. The exciter provides excitation.

Preferably, the number of poles of the generator rotor coil 12 is 8 times the number of poles of the motor rotor coil 11. The number of poles of the generator rotor coil 12 and the number of poles of the motor rotor coil 11 are located on the same main shaft 14, so that the commercial power 50HZ can be converted into a 400HZ intermediate frequency power supply.

In order to facilitate the manufacturing process, the rotor 3 further includes a rotor core 13, the motor rotor coil 11 is wound on an inner layer of the rotor core 13, and the generator rotor coil 12 is wound on an outer layer of the rotor core 13. The motor rotor coil 11 forms a squirrel cage structure by using a parallel ring. The generator rotor 3 can be conveniently taken off the line, the motor rotor coil 11 is taken off the line firstly, and the motor rotor coil 11 forms a squirrel cage structure by using parallel rings. So that the structure is small and the generator rotor coil 12 can be conveniently installed after the installation of the motor rotor coil 11.

The principle is as follows: the power is supplied to the stator coil 9 of the motor, the rotor 3 rotates, depending on the residual magnetic voltage of the motor (if the permanent magnet excitation mode is adopted, the permanent magnet machine provides voltage), the exciting current is provided to the exciter stator 1 after rectification, the voltage of the exciter rotor 5 is gradually increased, the alternating voltage is sent to the magnetic field of the main machine rotor 3 after being rectified by the rotary rectifier 2, the main generator establishes voltage, and when the rotating speed is close to a rated value, the automatic voltage regulator 15 enables the voltage of the generator to rapidly increase and be stabilized at the rated value. In order to make the motor generate 400Hz three-phase alternating current, the number of poles of the generator is 8 times of the number of poles of the motor according to the rotating speed of 60. If the motor is 2P, the generator is 16P. For example, the medium frequency power supply is 400Hz, the power is 50kW, the number of stator slots is 48, and the number of rotor 3 slots is 40. The motor is 2 poles and the generator is 16 poles.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. The present invention is not to be limited by the specific embodiments disclosed herein, and other embodiments that fall within the scope of the claims of the present application are intended to be within the scope of the present invention.

Claims

1. An intermediate frequency power supply comprises a base (6), a stator core (8) with a winding and a rotor (3) rotationally matched with the base (6); the method is characterized in that:

the stator core (8) with the winding is provided with a motor stator coil (9) and a generator stator coil (10); the rotor is provided with a motor rotor coil (11) and a generator rotor coil (12); the motor stator coil (9) is energized to drive the rotor to rotate so that the generator stator coil (10) generates electrical energy.

2. The intermediate frequency power supply of claim 1, wherein:

the magnetic excitation machine is characterized by further comprising an exciter stator (1) fixed on the machine base (6), the output end of the stator core (8) with the winding is electrically connected with an automatic voltage regulator (15), and the automatic voltage regulator (15) is electrically connected with the exciter stator (1).

3. The intermediate frequency power supply of claim 2, wherein:

the rotor further comprises a main shaft (14), an exciter rotor (5) matched with the exciter stator (1) is arranged on the main shaft (14), a rotary rectifier (2) is electrically connected to the exciter rotor (5), and the rotary rectifier (2) is electrically connected with the generator rotor coil (12).

4. The intermediate frequency power supply of claim 1, wherein:

the number of poles of the generator rotor coil (12) is 8 times that of the motor rotor coil (11).

5. The intermediate frequency power supply of claim 1, wherein:

the rotor further comprises a rotor core (13), the motor rotor coil (11) is wound on the inner layer of the rotor core (13), and the generator rotor coil (12) is wound on the outer layer of the rotor core (13).

6. The IF power supply of claim 5, wherein:

the rotor coils (11) of the motor form a squirrel-cage structure by using parallel rings.

7. The intermediate frequency power supply of claim 2, wherein:

a generator box body (4) is arranged above the outer side wall of the engine base (6), and the automatic voltage regulator (15) is located in the generator box body (4).