Oil-immersed variable-frequency rectifier transformer with novel insulation structure
By integrating high and low voltage coils with an insulation structure, the failure problem of oil-immersed frequency conversion rectifier transformers under harmonic impacts is solved, achieving a more stable electric field distribution and mechanical strength, and reducing material costs.
Patent Information
- Application Number
- CN202423187283.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-24
AI Technical Summary
The insulation structure of existing oil-immersed variable frequency rectifier transformers is prone to failure when faced with harmonic impacts from the variable frequency system, and the traditional segmented structure leads to uneven electric field distribution and insufficient mechanical strength.
The high-voltage and low-voltage coils are wound in one piece, combined with an integrated insulating cylinder and support bars, and insulating pads and split corner rings are used to ensure insulation and uniform electric field distribution, and improve mechanical strength.
It improves the transformer's short-circuit withstand capability and operational stability, reduces material costs, and enhances insulation performance and electric field uniformity.
Smart Images
Figure CN223582802U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to transformer technical field especially relates to a novel oil -immersed frequency conversion rectifier transformer of insulation structure. BACKGROUND
[0002] Oil -immersed frequency conversion rectifier transformer is a kind of equipment that AC power is converted into another voltage grade AC power by electromagnetic induction principle, and is converted into DC power by rectifier device. Its internal coil and magnetic core are soaked in insulating oil, and the stable operation of transformer is maintained by using the cooling and insulation performance of oil.
[0003] Oil -immersed frequency conversion rectifier transformer is the main equipment for providing power for frequency converter in large frequency conversion device. The insulation structure of existing oil -immersed frequency conversion rectifier transformer usually adopts the structure of sectional insulation cylinder, insulation stay, high-voltage coil, low-voltage coil, insulation ring and the like, and the high-voltage coil head is introduced from the insulation ring of the middle section of sectional coil.
[0004] The above has the following defects, the influence of various harmonics of frequency conversion system on transformer causes failure fault, for this, further improve the existing insulation structure, to adapt to the impact of transformer to make coil electric field distribution more uniform, improve the overall short-circuit resistance of transformer, make overall operation stable, for this, a novel oil -immersed frequency conversion rectifier transformer of insulation structure is proposed to solve the above problems. UTILITY MODEL CONTENT
[0005] In order to make up for the above shortcomings, the utility model provides a novel oil -immersed frequency conversion rectifier transformer of insulation structure, aims at improving the problem of failure fault caused by the influence of various harmonics of frequency conversion system on transformer in prior art.
[0006] In order to realize the above purpose, the utility model adopts the following technical scheme: a novel oil -immersed frequency conversion rectifier transformer of insulation structure, including the core, the core is sequentially concentric from inside to outside and is surrounded by high-voltage coil, the high-voltage coil is surrounded by insulation cylinder, and the outer side of insulation cylinder has the stay with recess on both ends, the outer side of the stay with recess on both ends is surrounded by second insulation cylinder, the second insulation cylinder is surrounded by low-voltage coil, the high-voltage coil is provided with integrated insulation cylinder and integrated stay, the high-voltage coil is wound on integrated insulation cylinder and integrated stay, the high-voltage coil is provided with high-voltage coil head, and the high-voltage coil is provided with lower insulation ring, by coil integrated winding, the insulation is better, the intersegment insulation is evenly heat-dissipated, the electric field distribution is uniform, and the mechanical strength and stability of coil are improved.
[0007] As the further description of the above technical scheme: the high-voltage coil section is provided with the same thickness insulation pad, and the coil is integrally wound, so that the insulation is better, the section insulation heat dissipation is uniform, the electric field distribution is uniform, the mechanical strength and stability of the coil are improved, and the traditional segmented structure is improved.
[0008] As the further description of the above technical scheme: the high-voltage coil is led out from the upper insulation ring with the insulation pad and the lower insulation ring with the insulation pad respectively, the insulation performance between the high-voltage coil and the iron core is ensured by arranging the upper insulation ring with the pad and the lower insulation ring with the pad, and the insulation performance is better.
[0009] As the further description of the above technical scheme: the low-voltage coil is wound on the second integrated insulation cylinder and the second integrated support, the low-voltage coil section is provided with the same thickness insulation ring with the insulation pad, and the coil is integrally wound, so that the insulation is better, the section insulation heat dissipation is uniform, the electric field distribution is uniform, the ampere-turn balance of the high-voltage coil and the low-voltage coil is better, the mechanical strength of the coil is better, and the operation is more stable.
[0010] As the further description of the above technical scheme: the low-voltage coil end and the bottom are respectively provided with a shaped split angle ring, the split angle ring is uniformly distributed along the circumference, the insulation of the high-voltage coil and the low-voltage coil is better, and the operation is more stable.
[0011] As the further description of the above technical scheme: the lower insulation ring is provided with the insulation pad above and below the insulation ring, the bottom split angle ring has better heat dissipation, and the operation stability is better.
[0012] The utility model has the following beneficial effects:
[0013] 1. In the utility model, the coil is integrally wound, the insulation is better, the section insulation heat dissipation is uniform, the electric field distribution is uniform, the mechanical strength and stability of the coil are improved, the traditional segmented structure is improved, and the problem that the transformer is prone to failure when being impacted is solved.
[0014] 2. In the utility model, the split angle ring is uniformly distributed along the circumference, the insulation performance of the high-voltage coil and the low-voltage coil is more stable, the cost is saved, the traditional high-voltage coil and low-voltage coil are segmented, the high-voltage coil is led out from the middle section of the segmented coil, the split angle ring is arranged between the sections, the axial height of the coil is occupied, and the material cost is higher. DRAWINGS
[0015] Figure 1 The utility model provides a kind of structure schematic diagram of oil-immersed variable frequency rectifier transformer of novel insulation structure;
[0016] Figure 2 The utility model provides a kind of lower insulation ring structure schematic diagram of oil-immersed variable frequency rectifier transformer of novel insulation structure;
[0017] Figure 3 A split angle ring structure diagram of the oil-immersed variable frequency rectifier transformer with the novel insulation structure is shown in the utility model.
[0018] Figure 4 A structure diagram of the oil-immersed variable frequency rectifier transformer with the novel insulation structure is shown in the utility model.
[0019] Legend:
[0020] 10, core; 20, high-voltage coil; 30, low-voltage coil; 001, insulation cylinder; 002, support bar with grooves at both ends; 003, second insulation cylinder; 004, integrated insulation cylinder; 005, integrated support bar; 006, upper insulation ring; 007, lower insulation ring; 008, second integrated insulation cylinder; 009, second integrated support bar; 010, insulation ring; 011, split angle ring; 012, insulation pad; 201, high-voltage coil head. DETAILED DESCRIPTION
[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.
[0022] Reference Figures 1-3 The utility model provides an embodiment: a novel insulation structure's oil-immersed variable frequency rectifier transformer, including core 10, core 10 is from inside to outside concentric and has high-voltage coil 20 in order sequence outside sleeve, high-voltage coil 20 outside surrounds insulation cylinder 001, and the support bar 002 with the groove at both ends is provided with on the outside of insulation cylinder 001, and the support bar 002 with the groove at both ends outside surrounds second insulation cylinder 003, and second insulation cylinder 003 has low-voltage coil 30 outside sleeve, and the integrated insulation cylinder 004 and integrated support bar 005 are provided on high-voltage coil 20, and high-voltage coil 20 is wound on integrated insulation cylinder 004 and integrated support bar 005, and high-voltage coil 20 is provided with high-voltage coil head 201, and lower insulation ring 007 is installed and is provided on high-voltage coil 20, and through the integrated winding of coil, the better insulation, the even heat dissipation of intersegment insulation, the even electric field distribution, improve the mechanical strength and stability of coil, and the better insulation, the even heat dissipation of intersegment insulation, the even electric field distribution, improve the mechanical strength and stability of coil.
[0023] Reference Figures 2-4, the high-voltage coil is led out from the upper insulation ring 006 with the insulation pad 012 and the lower insulation ring 007 with the insulation pad 012, the low-voltage coil 30 is wound on the second integrated insulation cylinder 008 and the second integrated support 009, the low-voltage coil 30 is placed with the insulation ring 010 with the insulation pad 012 with the same thickness between the segments, the end and the bottom of the low-voltage coil 30 are respectively placed with the shaped split corner ring 011, the split corner ring 011 is uniformly distributed along the circumference, the lower insulation ring 007 is provided with the insulation pad 012 above and below the insulation ring 010, the insulation performance between the high-voltage coil 20 and the iron core 10 is ensured through the upper insulation ring 006 with the pad and the lower insulation ring 007 with the pad, the insulation performance is better, the insulation is better through the integrated winding of the coil, the inter-segment insulation is uniformly heat-dissipated, the electric field is uniformly distributed, the ampere-turn balance of the high-voltage coil and the low-voltage coil is better, the mechanical strength of the coil is better, and the operation is more stable, the insulation of the high-voltage coil and the low-voltage coil is better through the uniform distribution of the split corner ring 011 along the circumference, and the operation is more stable.
[0024] Working principle: through the integrated winding of the coil, the insulation is better, the inter-segment insulation is uniformly heat-dissipated, the electric field is uniformly distributed, the mechanical strength and stability of the coil are improved, the high-voltage coil is led out from the upper insulation ring 006 with the insulation pad 012 and the lower insulation ring 007 with the insulation pad 012, the distance between the coil segments is saved, the material cost is saved, the insulation performance between the high-voltage coil 20 and the iron core 10 is ensured through the upper insulation ring 006 with the pad and the lower insulation ring 007 with the pad, the insulation performance is better, the integrated winding of the coil is better, the insulation is better, the inter-segment insulation is uniformly heat-dissipated, the electric field is uniformly distributed, the ampere-turn balance of the high-voltage coil and the low-voltage coil is better, the mechanical strength of the coil is better, the operation is more stable, the insulation of the high-voltage coil and the low-voltage coil is better through the uniform distribution of the split corner ring 011 along the circumference, and the operation is more stable.
[0025] Finally, it should be noted that: the above only describes the preferred embodiments of the present application, and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.
Claims
1. A novel oil-immersed variable frequency rectifier transformer with a novel insulation structure, comprising an iron core (10), characterized in that: The core (10) is concentrically fitted with high-voltage coils (20) from the inside out. The high-voltage coils (20) are surrounded by insulating cylinders (001). The insulating cylinders (001) have support bars (002) with grooves at both ends on their outer sides. The support bars (002) with grooves at both ends are surrounded by a second insulating cylinder (003). The second insulating cylinder (003) is fitted with a low-voltage coil (30). The high-voltage coils (20) are provided with an integrated insulating cylinder (004) and an integrated support bar (005). The high-voltage coils (20) are wound on the integrated insulating cylinders (004) and the integrated support bars (005). The high-voltage coils (20) are provided with high-voltage coil outlets (201). The high-voltage coils (20) are installed with a lower insulating ring (007).
2. The oil-immersed variable frequency rectifier transformer with a novel insulation structure according to claim 1, characterized in that: Insulating pads (012) of the same thickness are placed between the high-voltage coil (20) sections.
3. The oil-immersed variable frequency rectifier transformer with a novel insulation structure according to claim 1, characterized in that: The high-voltage coil leads (201) are respectively led out from the upper insulating ring (006) with insulating pad (012) and the lower insulating ring (007) with insulating pad (012).
4. The oil-immersed variable frequency rectifier transformer with a novel insulation structure according to claim 1, characterized in that: The low-voltage coil (30) is wound on the second integrated insulating cylinder (008) and the second integrated support bar (009), and insulating rings (010) with insulating pads (012) of the same thickness are placed between the segments of the low-voltage coil (30).
5. The oil-immersed variable frequency rectifier transformer with a novel insulation structure according to claim 1, characterized in that: The low-voltage coil (30) has shaped segmented corner rings (011) placed at its end and bottom, and the segmented corner rings (011) are evenly distributed along the circumference.
6. The oil-immersed variable frequency rectifier transformer with a novel insulation structure according to claim 1, characterized in that: The lower insulating ring (007) has insulating pads (012) on both the upper and lower sides of the insulating ring (010).