CN112039235A

CN112039235A - Water-cooling structure concentrated winding direct-drive permanent magnet wind driven generator stator

Info

Publication number: CN112039235A
Application number: CN202010755936.0A
Authority: CN
Inventors: 丛啸桀; 俞文斌; 李丹; 贾泽伟; 黄娜
Original assignee: Xi'an Zhongche Yongdian Jieli Wind Energy Co ltd
Current assignee: Xi'an Zhongche Yongdian Jieli Wind Energy Co ltd
Priority date: 2020-07-31
Filing date: 2020-07-31
Publication date: 2020-12-04

Abstract

A water-cooling structure concentrated winding direct-drive permanent magnet wind driven generator stator comprises a long-strip-shaped single-tooth iron core fixed on a stator support, concentrated winding coils are arranged on two sides of the length direction of the single-tooth iron core, a through hole penetrating through the iron core is formed in the yoke portion of each single-tooth iron core, and a cooling water pipe penetrates through the through hole. The motor stator adopts a concentrated winding structure of a single-tooth iron core, and the stator of the single-tooth iron core structure is used for the first time by the generator. The water jacket is placed on the yoke portion of the single-tooth iron core, so that the space of the single-tooth punching sheet can be effectively utilized, the motor is more compact, the size of the generator is reduced, the water jacket is placed on the yoke portion of the single-tooth iron core, the space of the single-tooth punching sheet can be effectively utilized, the motor is more compact, the size of the generator is reduced, and the cooling effect on the stator is more obvious.

Description

Water-cooling structure concentrated winding direct-drive permanent magnet wind driven generator stator

Technical Field

The invention belongs to the technical field of wind driven generators, and particularly relates to a water-cooling structure concentrated winding direct-drive permanent magnet wind driven generator stator.

Background

The wind power generator converts wind energy into electric energy, is a clean renewable energy source, and receives more and more attention. Among a plurality of generator types, the direct-drive permanent magnet wind driven generator has the characteristics of simple structure, high transmission efficiency, high reliability and the like, and is one of main machine types in the wind power industry.

With the development of wind driven generators, the economy of the wind driven generator is more and more emphasized, and in order to bring better economic benefits, a stator of a direct-drive permanent magnet wind driven generator adopts a concentrated winding topological structure. The end part of the stator coil of the generator adopting the concentrated winding topological structure is short in length, and compared with the generator stator coil with the same power, the weight of the stator coil can be reduced by 5%, so that the generator has better economic performance. However, the air gap magnetic field of the permanent magnet generator with the concentrated winding topological structure contains rich harmonic waves, and the harmonic waves can cause the loss of the permanent magnet generator to be increased, so that the temperature of the direct-drive permanent magnet wind driven generator is increased.

In order to reduce the temperature rise of the direct-drive permanent magnet wind driven generator, the existing air-air cooling technology adopted by the cooling structure of the direct-drive permanent magnet wind driven generator is that a stator core is provided with a ventilation channel, external air is used for cooling, the air enters an internal wind path of the generator through an external cooler, the generator is cooled through an air gap and the ventilation channel of the stator core, and the generator is cooled mainly by means of cooling air. Due to the particularity of the concentrated winding topological structure, the traditional air-air cooling measures are adopted, the cooling air cannot completely take away the heat of the generator, and the cooling effect is poor, so that the problem of temperature rise caused by the concentrated winding topological structure cannot be solved by the conventional scheme.

Disclosure of Invention

The invention aims to provide a water-cooling structure concentrated winding direct-drive permanent magnet wind driven generator stator, which solves the problem of high temperature rise of a direct-drive permanent magnet wind driven generator caused by adopting a concentrated winding topological structure.

The technical scheme adopted by the invention is as follows:

a water-cooling structure concentrated winding direct-drive permanent magnet wind driven generator stator comprises a long-strip-shaped single-tooth iron core fixed on a stator support, concentrated winding coils are arranged on two sides of the length direction of the single-tooth iron core, a through hole penetrating through the iron core is formed in the yoke portion of each single-tooth iron core, and a cooling water pipe penetrates through the through hole.

Furthermore, the cross section of the single-tooth iron core is in a T shape, and the concentrated winding coils are respectively arranged on T-shaped steps on two sides of the single-tooth iron core.

Furthermore, each single-tooth iron core is provided with two through holes, and the through holes are formed along the length direction of the iron core.

Furthermore, the cooling water pipes are U-shaped and penetrate through the two through holes in the single-tooth iron core, the two adjacent cooling water pipes are connected through water pipe joints, and then all the cooling water pipes are connected in series to form a cooling water jacket, and the cooling water jacket is provided with a uniform water inlet and a uniform water outlet.

Furthermore, the cooling water pipe is made of copper.

The invention has the beneficial effects that:

the motor stator adopts a concentrated winding structure of a single-tooth iron core, and the stator of the single-tooth iron core structure is not used in the field before and is used for the first time in the generator.

Because the single-tooth iron cores are long-strip-shaped, and each single-tooth iron core is installed on the stator bracket after being laminated, the stator does not contain a radial ventilation duct. If air-to-air cooling is used, the air passages cannot completely cool the stator. Therefore, a water cooling structure is considered. The water jacket of the conventional water-cooled motor is generally placed on the base. The generator is of an outer rotor and inner stator structure and has no base, so the water jacket is placed at the yoke part of the single-tooth iron core. The water jacket is arranged on the yoke part of the single-tooth iron core, so that the space of the single-tooth punching sheet can be effectively utilized, the motor is more compact, the size of the generator is reduced, and the motor is more economical. The cooling water jackets are arranged in a Z shape, the water inlet and the water outlet of the cooling water jackets are concentrated, and the cooling area is large; and the water jacket is placed at the yoke part, so that the cooling effect on the stator is more obvious.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of a cooling water jacket structure;

in the figure, the water pipe comprises a water pipe 1, a water pipe 2, a single-tooth iron core 3, a concentrated winding coil 4, a water inlet 5, a water pipe joint 6 and a water outlet.

Detailed Description

As shown in fig. 1, the water-cooling structure concentrated winding direct-drive permanent magnet wind power generator stator comprises a long-strip-shaped single-tooth iron core 2 fixed on a stator support, concentrated winding coils 3 are arranged on two sides of the single-tooth iron core 2 in the length direction, a yoke portion of each single-tooth iron core 2 is provided with a through hole penetrating through the iron core, and a cooling water pipe 1 penetrates through the through hole. The cross section of the single-tooth iron core 2 is T-shaped, and the concentrated winding coils 3 are respectively arranged on the T-shaped steps on the two sides of the single-tooth iron core 2. Each single-tooth iron core 2 is provided with two through holes which are arranged along the length direction of the iron core.

As shown in fig. 2, the cooling water pipe 1 is made of copper material, has good mechanical properties and flexibility, and also has good heat conductivity, is U-shaped, and is inserted into two through holes on the single-tooth iron core 2, and two adjacent cooling water pipes 1 are connected by a water pipe joint 5, and furthermore, all cooling water pipes 1 are connected in series to form a cooling water jacket, and the cooling water jacket is provided with a uniform water inlet 4 and a uniform water outlet 6.

Compared with actual production, the water cooling structure can reduce the temperature rise by about 10 percent compared with an air-air cooling mode.

Claims

1. The utility model provides a water-cooling structure concentrated winding directly drives permanent magnet wind power generator stator which characterized in that, is including fixing rectangular form single tooth iron core (2) on the stator support, has arranged concentrated winding coil (3) along single tooth iron core (2) length direction's both sides, offers the through-hole that link up unshakable in one's determination in the yoke portion of every single tooth iron core (2), wears to be equipped with cooling water pipe (1) in the through-hole.

2. The water-cooling structure concentrated winding direct-drive permanent magnet wind power generator stator as claimed in claim 1, wherein the cross section of the single-tooth iron core (2) is in a T shape, and concentrated winding coils (3) are respectively arranged on T-shaped steps on two sides of the single-tooth iron core (2).

3. The water-cooled structure concentrated winding direct-drive permanent magnet wind power generator stator as claimed in claim 1, wherein each single-tooth iron core (2) is provided with two through holes, and the through holes are formed along the length direction of the iron core.

4. The stator of the water-cooling structure concentrated winding direct-drive permanent magnet wind power generator as claimed in claim 1, wherein the cooling water pipes (1) are U-shaped and penetrate through two through holes in the single-tooth iron core (2), two adjacent cooling water pipes (1) are connected through water pipe connectors (5), further, all the cooling water pipes (1) are connected in series to form a cooling water jacket, and the cooling water jacket is provided with a uniform water inlet (4) and a uniform water outlet (6).

5. The stator of the water-cooled structure concentrated winding direct-drive permanent magnet wind power generator as claimed in claim 1, wherein the cooling water pipe (1) is made of copper.