WO2019024697A1

WO2019024697A1 - Zpsg-w phase shift rectifier transformer

Info

Publication number: WO2019024697A1
Application number: PCT/CN2018/096475
Authority: WO
Inventors: 田正稳
Original assignee: 江苏亚威变压器有限公司
Priority date: 2017-07-31
Filing date: 2018-07-20
Publication date: 2019-02-07
Also published as: CN107221421A; CN107221421B

Abstract

A ZPSG-W phase shift rectifier transformer comprises a left clamping member (5) and a right clamping member (2), a transformer support frame (3), struts (7), a low-voltage coil head (9), and a winding. The winding comprises an iron core (10) and a low-voltage coil (1) and a high-voltage coil (4) sequentially provided on an outer side of the iron core (10) and containing a main winding and a phase shift winding. When winding the low-voltage coil and the high-voltage coil, winding can be performed according to related size requirements. A reinforcing plate (11) is provided on both the left clamping member, and the right clamping member. A strut (7) is provided both between and on the outside of the high-voltage coil. The strut on the outside of the high-voltage coil is fastened and connected to the high-voltage coil by means of an adhesive tape. Each of the struts has a hollow tube structure and an opening is provided at two ends thereof. A circular groove (701) is disposed on each side surface of an outer side of each of the struts along a center line thereof. The phase shift rectifier transformer is simple to use and easy to process with a low temperature increase, low partial discharge, minimal loss, and high overload capacity. Further, the transformer can be manufactured into a unique structure according to the transformer size required by a client.

Description

ZPSG-W phase shift rectifier transformer

Technical field

The invention relates to the technical field of transformers, in particular to a ZPSG-W phase shift rectifier transformer.

Background technique

The phase-shifting rectifier transformer is a kind of rectifier transformer. It is not only an important kind of industrial and mining electrical equipment, but also can be used as a precision instrument in the measurement room and laboratory.

The rectifier transformer is the power transformer of the rectifier device. The rectification device is characterized by the original input AC, and the secondary side outputs DC after rectifying the original. Converter is a general term for three working modes of rectification, countercurrent and frequency conversion. Rectification is one of the most widely used. A transformer used as a power source for a rectifying device is called a rectifying transformer. Most of the industrial rectified DC power supplies are obtained by the AC grid through rectifier transformers and rectifier equipment.

Dry phase shift rectifier transformers are used in high-voltage inverters. At present, domestic large-capacity products are often wound in parallel with multiple secondary electromagnetic wires. As the capacity of the transformer increases, the number of parallel wires also increases to meet the temperature rise and loss requirements of the transformer. When the capacity of the transformer increases, the number of wires to be connected in parallel will also increase. Due to the difference in inductance and heat conduction between the parallel wires, the current of the parallel wire phase will increase more and more with the number of parallel wires. Causes an imbalance in the temperature rise of the transformer. The transformer has overheated area, which affects the service life of the transformer and the output capacity of the transformer. At the same time, the overload capability of the transformer is weak, and the fixing effect on the coil is not good when the low-voltage coil is wound, which is easy to cause the head to run off and affect. In addition, in the prior art, the cross section of the struts is generally rectangular, and the coils are all in contact with the outer surface of the struts, thereby reducing the heat dissipation area; therefore, in this context, we must not only have a safe and reliable product. Quality, and the high efficiency of the transformer will also become an indispensable advantage.

For example, Chinese Patent Application No. 201420868267.8 discloses a dry phase shifting rectifier transformer, characterized in that the transformer comprises: a core leg, an insulating cylinder, a primary coil winding, a secondary coil winding, a comb stay, The secondary coil winding comprises a plurality of wire cakes arranged in parallel, and the comb-shaped struts are disposed outside the insulating cylinder to support the respective wire cakes; the wire cake is a copper foil or an aluminum foil, and the wire cakes are wound on the comb-shaped struts. The dry phase shifting rectifier transformer proposed by the utility model solves the situation that the current is uneven during the operation of the existing transformer. The transformer of the utility model uses copper (aluminum) foil to make the coil, which eliminates the insulation between the electromagnetic wires, so that the current can be evenly distributed on the winding. At the same time, the thinner foil can reduce the advantage of stray loss and further reduce the loss and temperature rise; however, the transformer in this technical solution has weaker overload capability, and the short-circuit resistance of the one-time short-circuit is small, which is easy to damage the transformer.

Further, for example, the Chinese Patent Application No. 201220113433.4 discloses a dry type transformer stay including a rectangular parallelepiped insulating member, characterized in that each of the oppositely disposed sides of the rectangular parallelepiped insulating member is symmetric along respective center lines. A set of slots is provided in the ground; the dry type transformer stay disclosed in the application increases the heat dissipation area by reducing the temperature rise of the transformer by providing a semicircular long groove on the side of the solid rectangular parallelepiped, but the struts in the technical solution adopt solid stays. Not only increases the weight of the stay, but also to some extent, the heat dissipation area of the stay itself is limited.

Summary of the invention

In order to overcome the problems of weak overload capability, high loss and large temperature rise existing in the prior art, the present invention provides a ZPSG-W type shift with strong overload capability, low temperature rise, low loss, and design of its structure as needed. Phase rectifier transformer.

The invention provides a ZPSG-W phase shifting rectifier transformer, comprising a left clamping member and a right clamping member, a transformer supporting frame, a struts, a low voltage coil outlet and a winding, the winding comprising an iron core, and sequentially arranged on the iron core An outer low voltage coil and a high voltage coil including a main winding and a phase shift winding, and the low voltage coil and the high voltage coil are wound according to a required size, and the left clamp member and the right clamp member are both wound a reinforcing plate is disposed, and a struts are disposed between the high voltage coils and the outside of the high voltage coil, and the struts outside the high voltage coil are fastened to the high voltage coil by an adhesive tape, the struts It is a hollow tubular structure, and its both ends are open, and each side of the outer side of the stay is provided with a notch along its respective center line.

In some embodiments, the notch provided on the struts is a circular arc-shaped notch, the notch penetrating through the two ends of the struts, and the notches and the struts are stretched at one time forming.

In some embodiments, the low-voltage coil is an "8"-shaped embossed head, the low-voltage coil is disposed in the low-voltage coil outlet, and the low-voltage coil outlet includes a pressure plate, a groove, and a mounting hole. The two pressure plates on the "8" shape of the outlet of the low voltage coil are provided with the groove and the mounting hole, and the low voltage coil is disposed in the groove.

In some embodiments, the low voltage coil is a foil wound structure, and the first and last copper bars of the low voltage coil are soldered to the foil, and the first and the end copper bars of the low voltage coil are welded to the foil.

In some embodiments, the low-voltage coil is internally provided with a plurality of struts and an epoxy liner, the struts are disposed between the epoxy liner and the core, and the inside of the low-voltage coil A stay can support the interior of the low voltage coil.

In some embodiments, the end insulation of the low voltage coil and the adjacent turns of the low voltage coil are fixed by a shrink band, and the adjacent turns are laminated by the shrink band.

In some embodiments, the width of the struts disposed between the high-voltage coils may be 8 mm and 4 mm, and the two width struts are placed at an intersection, and the two struts are placed at a pitch of 10-15 mm. .

In some embodiments, the high voltage coil is provided with a high voltage end insulation, and the high voltage end insulation and the adjacent coil of the high voltage coil are fixed by a shrink band and fixed by brushing.

In some embodiments, the transformer support frame is provided with three iron cores arranged in parallel above and below, and the low voltage coils are closely arranged on the outer sides of the three iron cores, and the outer sides of the low voltage coils are coaxially disposed. High voltage coils are described.

In some embodiments, the low voltage coil and the high voltage coil are both coated with a layer of insulating varnish, the insulating varnish having a thickness of 0.5 mm.

Compared with the prior art, the present invention provides a ZPSG-W phase shift rectifier transformer, which has the advantages of:

1. A ZPSG-W phase-shifting rectifier transformer provided by the invention is provided with an "8"-shaped embossed low-voltage coil, which not only can effectively fix the low-voltage coil, but also can make the low-voltage coil be wound. The fixing effect on the low voltage coil is better.

2. A ZPSG-W phase shifting rectifier transformer provided by the present invention, by providing an epoxy liner and a struts in the low voltage coil, not only can the low voltage coil be compacted around the epoxy layer during winding. Moreover, the inside of the low voltage coil can be tightened, thereby improving the overload capability of the transformer.

3. A ZPSG-W phase-shifting rectifier transformer provided by the present invention, by arranging a struts outside the high-voltage coil, and the external struts are tightened by a non-weft adhesive tape to wrap the outer portion of the transformer coil to further improve the overload of the transformer. ability.

4. A ZPSG-W phase shifting rectifier transformer provided by the present invention, by arranging the transformer base up and down, and providing a reinforcing plate on the upper clamping member and the lower clamping member to ensure mechanical force, so that the transformer is up and down Pressurize to increase the overload capacity of the transformer.

V. The ZPSG-W phase shifting rectifier transformer provided by the invention not only saves the weight of the struts but also increases the weight of the struts by setting the struts into a hollow structure and providing the notches on the outer surface of the struts. The heat dissipation area of the large struts can reduce the contact surface between the low voltage coil and the struts, increase the heat dissipation area of the coil itself, and further reduce the temperature rise of the transformer.

6. A ZPSG-W phase shifting rectifier transformer provided by the present invention, which is used for adding a wire by using a foil winding structure for the low voltage coil and a cutting process at the first and the end copper row and the foil of the low voltage coil. It can reduce the advantage of stray loss and further reduce loss and temperature rise.

7. A ZPSG-W phase shifting rectifier transformer provided by the invention reduces the partial discharge phenomenon of the transformer by insulating the low voltage coil and the high voltage coil outside, and setting the epoxy weighing cylinder at the same time.

8. A ZPSG-W phase-shifting rectifier transformer is easy to use, easy to process, has the characteristics of low temperature rise, low partial discharge, low loss, strong overload capability, etc., and can manufacture a unique structure according to the customer's demand for the size of the transformer. form.

DRAWINGS

1 is a schematic view showing the overall assembly of a ZPSG-W phase shift rectifier transformer of the present invention;

2 is a partial cross-sectional view showing the winding of the low voltage coil of the ZPSG-W phase shifting rectifier of the present invention;

3 is a schematic cross-sectional structural view of a ZPSG-W phase shift rectifier transformer stay of the present invention;

Figure 4 is a side view of the ZPSG-W phase shift rectifier transformer stay of the present invention;

Fig. 5 is a structural schematic view showing the low-voltage coil of the ZPSG-W phase-shifting rectifier transformer of the present invention.

In the figure: 1, low voltage coil; 2, right clamp; 3, transformer support; 4, high voltage coil; 5, left clamp; 6, high voltage end insulation; 7, struts; 701, notch; 8, ring Oxygen liner; 9, low-voltage coil head; 901, pressure plate; 902, groove; 903, mounting hole; 10, iron core; 11, reinforcing plate.

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The invention discloses a ZPSG-W phase shifting rectifier transformer, as shown in FIG. 1 to FIG. 5, including a left clamping member 5 and a right clamping member 2, a transformer supporting frame 3, a staying bar 7, and a low voltage coil. And a winding comprising an iron core 10, and a low voltage coil 1 and a high voltage coil 4 including a main winding and a phase shifting winding disposed outside the iron core 10, the low voltage coil 1 and the high voltage coil 4 being wound The winding may be performed according to the relevant requirements. The left clamping member 5 and the right clamping member 2 are respectively provided with a reinforcing plate 11 , and the high voltage coil 4 and the high voltage coil 4 are respectively provided with a support. a strip 7 , the struts 7 on the outside of the high-voltage coil 4 are fastened to the high-voltage coil 4 by an adhesive tape, wherein the struts 7 are hollow tubular structures, and both ends thereof are open, Each side of the outer side of the stay 7 is provided with a notch 701 along a respective center line; the invention is convenient to use, easy to process, has the characteristics of low temperature rise, low partial discharge, low loss, strong overload capability, and the like The customer's need for the size of the transformer creates a unique structural form.

In this embodiment of the present invention, as shown in FIG. 3 to FIG. 4, the notch 701 provided on the stay 7 is a circular arc-shaped notch 701, and the notch 701 extends through the stay 7 At both ends, the notch 701 and the struts 7 are stretch-molded at one time; the present invention can be provided not only by providing the struts 7 in a hollow structure but also providing the notches 701 on the outer side surface of the struts 7. The material saving reduces the weight of the stay 7 and increases the heat dissipation area of the stay 7, and can reduce the contact surface of the low voltage coil 1 and the stay 7, increase the heat dissipation area of the coil itself, and further reduce the temperature rise of the transformer.

Specifically, in this embodiment of the present invention, the cross section of the stay 7 is a side notched rectangle, and further preferably, the stay 7 is provided with four elongated slots 701 extending through the side of the stay 7 , and The four edges of the outer circumference of the stay 7 are all transitional rounded structures, which prevent the wear of the coils by the right-angled edges.

In this embodiment of the invention, as shown in FIG. 5, the low-voltage coil head 9 is an "8"-shaped embossed head, and the low-voltage coil 1 is disposed in the low-voltage coil head 9, the low voltage. The coil head 9 includes a pressing plate 901, a groove 902, and a mounting hole 903. The two embossing plates 901 of the "8" shape of the low-voltage coil head 9 are provided with the groove 902 and the mounting hole 903. The low-voltage coil 1 is disposed in the groove 901; the present invention is not only more effective in fixing the low-voltage coil head 9 but also in the low-voltage coil 1 by means of the "8"-shaped embossed low-voltage coil head 9 provided. When the system is manufactured, the fixing effect on the low voltage coil 1 is better.

Specifically, in this embodiment of the present invention, the low-voltage coil head 9 includes two circular pressure plates 901, forming an "8"-shaped embossed low-voltage coil output 9, each of which is provided with a plurality of grooves 902 and a plurality of mounting holes 903, two circular annular pressing plates 901 are fixedly connected by a connecting shaft, and at least one groove 902 is disposed on the circumference of the inner circle of the pressing plate 901, and at least three mounting holes 903 are provided on the annular surface of the pressing plate 901, and the low-voltage coil 1 is fixed in the recess 902.

In this embodiment of the invention, the low-voltage coil 1 is a foil-wound structure, the first and the end copper bars of the low-voltage coil 1 are welded to the foil, and the first and the end copper bars of the low-voltage coil 1 are welded to the foil. The cutting process is performed; the invention adopts a foil winding structure in the low-voltage coil 1 and cuts the copper strip and the foil at the first end and the end of the low-voltage coil 1 to increase the bonding wire, thereby reducing the advantage of stray loss. , further reduce the loss and temperature rise of the transformer.

Specifically, in this embodiment of the invention, the low voltage coil 1 is wound with a copper foil, and the welded portion of the copper strip and the copper foil at the end of the low voltage coil 1 is increased in the number of bonding wires by performing a cutting process.

In this embodiment of the present invention, as shown in FIG. 2, the low voltage coil 1 is internally provided with a plurality of stays 7 and an epoxy liner 8 between the epoxy liner 8 and the core 10 The struts 7 are provided, and the struts 7 inside the low-voltage coil 1 can support the inside of the low-voltage coil 1; the invention provides an epoxy liner 8 and a struts 7 in the low-voltage coil 1 The low-voltage coil 1 can be tightly wound around the epoxy coil 8 during winding, and the inside of the low-voltage coil 1 can be tightened, thereby improving the overload capability of the transformer.

Specifically, in this embodiment of the invention, the struts 7 in the low-voltage coil 1 support the inner portion of the low-voltage coil 1 while filling the gap at the step of the iron core 10, and the epoxy liner 8 and The struts 7 disposed between the iron cores 10 are used to fill the gap between the epoxy liner 8 and the iron core 10, so that the epoxy liner 8 in the low-voltage coil 1 is a molded part, which can increase the mechanical force. The thickness should not be less than 3 mm, and the low-voltage coil 1 of the foil-wound structure should be wound around the epoxy liner 8 in accordance with the relevant requirements of the drawings during the winding, and the layers are tight.

In this embodiment of the invention, the end insulation of the low voltage coil 1 and the coil adjacent to the low voltage coil 1 are fixed by a shrink band, and the adjacent turns are laminated by the shrink band.

Specifically, in this embodiment of the invention, the end insulation of the low voltage coil 1 is fixed between the adjacent turns and the adjacent turns by a shrink band, and the adjacent turns are laminated by the shrink band. The fixed, low-voltage coil 1 is bundled and integrated by a shrinking belt, which can prevent the wire from being loose and the structure is firm and reliable.

In this embodiment of the invention, the width of the struts 7 disposed between the high-voltage coils 4 may be 8 mm and 4 mm, and the two width struts 7 are placed in a cross, the two struts 7, the spacing is 10 to 15 mm, the high-voltage coil 4 is provided with a high-voltage end insulation 6, the high-voltage end insulation 6 and the high-voltage coil 4 adjacent to the line 编 is fixed by the shrink band, and is fixed by brushing; The invention provides a struts 7 on the outside of the high-voltage coil 4, and the outer struts 7 are tightened by a non-weft adhesive tape to wrap the outer portion of the transformer coil, thereby further improving the overload capability of the transformer.

In this embodiment of the present invention, as shown in FIG. 1, three transformer cores 10 are disposed in parallel above and below the transformer support frame 3, and the low voltage coils are closely arranged on the outer sides of the three cores 10. 1, the low voltage coil 1 is coaxially disposed with the high voltage coil 4;

Specifically, in this embodiment of the invention, the transformer support frame 3 includes an upper support frame and a lower support frame, the upper and lower bases are vertically aligned, and the three cores of the transformer support frame 3 are arranged in parallel above and below. 10. The outer side of each core 10 is closely surrounded by a low voltage coil 1 which is coaxially disposed outside the low voltage coil 1.

Specifically, in this embodiment of the invention, the reinforcing plates 11 provided on the left and right clamping

members

5, 2, 2 are fixedly connected to the left and right clamping

members

5, 2, respectively; the present invention is applied to the transformer support frame 3 The bottom plate is aligned, and the reinforcing plate 11 is disposed on the left clamping member 5 and the right clamping member 2 to ensure mechanical force, so that the transformer is pressed left and right, thereby improving the overload capability of the transformer.

In this embodiment of the invention, the low voltage coil 1 and the high voltage coil 4 are each provided with an insulating layer having a thickness of 0.5 mm. The present invention passes the low voltage coil 1 and the high voltage coil 4 outside. Insulation treatment, and the setting of the epoxy weighing cylinder 8 at the same time, reducing the partial discharge phenomenon of the transformer.

Specifically, in this embodiment of the present invention, the insulating layer provided on the outside of the low voltage coil 1 and the high voltage coil 4 includes an insulating varnish and a PET polyester film, and the low voltage coil 1 and the high voltage coil 4 may be firstly immersed (one The layer is then coated, and the PET polyester film is coated on the outside of the coil coated with the insulating varnish.

In this embodiment of the invention, as shown in FIGS. 1 and 3, by aligning the upper and lower support frames of the transformer support frame 3 up and down, a reinforcing plate 11 is provided on the left and

right clamp members

5, 2, The low-voltage coil 1 is internally provided with the stay 7 and the epoxy liner 8, and the stay 7 is arranged outside the high-voltage coil 4, so that the invention is tightened by internal tension, left and right compression, process winding and external wrapping to achieve high overload capability. The invention has the characteristics of low temperature rise, low partial discharge, low loss and the like by using a foil wound around the low voltage coil 1, the low voltage coil output 9 provided, and the insulation treatment of the coil, and the invention can according to the size of the transformer of the customer. The need to create unique structural forms.

The above description shows and describes a preferred embodiment of the present invention. As described above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be construed as being Combinations, modifications, and environments, and variations and modifications may be made without departing from the spirit and scope of the inventions. It is intended to be within the scope of the appended claims.

Claims

A ZPSG-W phase shifting rectifier transformer comprising a left clamping member (5) and a right clamping member (2), a transformer support frame (3), a stay (7), a low voltage coil outlet (9) and a winding, The winding includes a core (10), and a low voltage coil (1) and a high voltage coil (4) including a main winding and a phase shift winding, which are disposed outside the core (10), the low voltage coil (1) and the high voltage line When the ring (4) is wound, it can be wound according to the relevant required size, and the left clamping member (5) and the right clamping member (2) are respectively provided with a reinforcing plate (11), and the high-voltage coil (4) Struts (7) are disposed between the outside of the high voltage coil (4), and the stays (7) outside the high voltage coil (4) are fastened to the high voltage coil (4) by adhesive tapes The connection is characterized in that: the stay (7) is a hollow tubular structure, and both ends thereof are open, and each side of the outer side of the stay (7) is provided with a notch along each center line (701). ).
The ZPSG-W phase shift rectifier transformer according to claim 1, wherein the notch (701) provided on the stay (7) is a circular arc slot (701), the slot The mouth (701) extends through both ends of the stay (7), and the notch (701) and the stay (7) are stretch-molded at one time.
The ZPSG-W type phase shifting rectifier transformer according to claim 1, wherein said low voltage coil outlet (9) is an "8" shaped embossed head, and said low voltage coil (1) is disposed at said In the low-voltage coil outlet (9), the low-voltage coil outlet (9) comprises a pressure plate (901), a groove (902) and a mounting hole (903), and the "8"-shaped portion of the low-voltage coil outlet (9) The two pressure plates (901) are respectively provided with the groove (902) and the mounting hole (903), and the low voltage coil (1) is disposed in the groove (901).
The ZPSG-W phase shifting rectifier transformer according to claim 1, wherein the low voltage coil (1) is a foil winding structure, and the first and the end copper bars of the low voltage coil (1) are soldered to the foil. The welding of the first and the end copper bars of the low-voltage coil (1) and the foil is cut.
The ZPSG-W phase shift rectifier transformer according to claim 1, characterized in that: the low voltage coil (1) is internally provided with a plurality of stays (7) and an epoxy liner (8), the epoxy liner The struts (7) are disposed between the cylinder (8) and the iron core (10), and the struts (7) inside the low voltage coil (1) can internalize the low voltage coil (1) Tightening.
The ZPSG-W type phase shifting rectifier transformer according to claim 1, characterized in that the end insulation of the low voltage coil (1) and the coil adjacent to the low voltage coil (1) are fixed by a shrink band, Adjacent lines are stacked when they are inserted through the shrink band.
The ZPSG-W phase shifting rectifier transformer according to claim 1, wherein the width of the stay (7) disposed between the high voltage coils (4) is 8 mm and 4 mm, The two width struts (7) are placed in an intersecting manner, and the two struts (7) are placed at a pitch of 10 to 15 mm.
The ZPSG-W phase shifting rectifier transformer according to claim 1, characterized in that: the high voltage coil (4) is provided with a high voltage end insulation (6), the high voltage end insulation (6) and the high voltage coil (4) The adjacent turns are fixed by the shrink band, and fixed by brushing.
The ZPSG-W type phase shifting rectifier transformer according to claim 1, wherein said transformer support frame (3) is provided with three said iron cores (10) in parallel, three of said iron cores ( 10) The low-voltage coils (1) are closely arranged on the outer side, and the high-voltage coils (4) are coaxially disposed on the outer sides of the low-voltage coils (1).
The ZPSG-W phase shift rectifier transformer according to claim 1, wherein the low voltage coil (1) and the high voltage coil (4) are externally coated with a layer of insulating varnish, and the thickness of the insulating varnish is 0.5mm.