Combined window voltage-stabilizing transformer iron core
By using multi-layer iron core stacking and insulating clamping, the problem of limited iron core window in existing technologies is solved, achieving high material utilization and low power loss, making it suitable for single-phase applications.
Patent Information
- Application Number
- CN202422629943.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2034-10-30
AI Technical Summary
The combined core design of existing AC voltage stabilizers is limited by the window size, which leads to material waste and increased power loss. Furthermore, it is difficult to adjust, thus limiting its application.
The transformer core is designed with rectangular windows by stacking multiple layers of iron chips. Large and small rectangular windows are formed by splicing F-shaped, I1 long strip, I2 short strip and I3 block iron cores, combined with the fixing method of insulating clamp and glass fiber bushing. The magnetic circuit gap is adjusted to facilitate design and reduce eddy currents.
It achieves unrestricted window area design adjustment, improves material utilization, reduces power loss and heat generation, lowers production costs and commissioning time, and is suitable for single-phase high-power voltage stabilizing transformers.
Smart Images
Figure CN223624807U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a voltage stabilizing transformer core, and more particularly to a combined core of a ferroresonant AC voltage stabilizing transformer. Background Technology
[0002] Existing AC voltage stabilizing transformers with combined cores, in order to reduce waste and make full use of materials, are mostly designed as E-1 type combined cores, such as... Figure 1 As shown, first, punch off the two side windows 3 and 4 of the iron chip to form type I transverse yokes. Then, cut the iron chip in half along the horizontal center line (dashed line) to form two type E main chips 1 and 2. Then, according to... Figure 2 As shown, a core with an EI-type structure is formed by combining a type I transverse yoke lamination with an E-type main chip. While this structure reduces waste material, the height of the core window depends on the length of the transverse yoke lamination, and the width of the window is limited by the width of the transverse yoke lamination. This significantly restricts the application of the core. Furthermore, the blank size for making the main chip lamination must be twice the actual core size to be stamped, resulting in a lot of scrap material that cannot be recycled during production. Given a fixed transformer power, the core cross-sectional area is also fixed. If the window winding cannot accommodate the core, the EI-type core must have its main chip size enlarged, resulting in a larger core and wasting silicon steel sheet material, increasing manufacturing costs. Ordinary transformers use metal clamps, directly fixed with metal screws. This creates eddy currents between the screws, main chips, and metal clamps during operation. This increases power loss and primary current in the transformer; it also increases the heat generated in the core, leading to a rise in voltage regulator temperature and a decrease in regulator performance. Summary of the Invention
[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a combined window voltage stabilizer transformer core with a simple structure, where the core window is not restricted by the transverse yoke, the core length can be easily enlarged, the window lengthened, and the magnetic circuit gap adjusted, facilitating design and adjustment, and minimizing eddy currents in the core.
[0004] The objective of this utility model can be achieved through the following measures:
[0005] A composite window-type voltage regulator transformer core is a transformer core with rectangular windows formed by stacking and splicing multiple layers of iron chips. The core with rectangular windows is characterized by being assembled from an F-shaped core with fixing holes and equal layer thickness, an I1 long strip core, an I2 short strip core, and an I3 block core, which are spliced together to form a transformer core with a large rectangular window W1 and a small rectangular window W2. The portion with the large rectangular window W1 constitutes the main magnetic circuit of the transformer core, while the portion with the small rectangular window W2 constitutes the secondary magnetic circuit of the core. Gaps are provided on the secondary magnetic circuit core. Finally, it is secured with type I insulating clamps and double-ended screws.
[0006] The large rectangular window W1 and the small rectangular window W2 mentioned above have the same width.
[0007] The aforementioned F-shaped iron core is provided with a first fixing hole, the 11 long strip iron core is provided with a second fixing hole, the 12 short strip iron core is provided with a third fixing hole, the insulating clamp is provided with a fourth fixing hole, and the fixing screw is equipped with a glass fiber sleeve (83).
[0008] The voltage stabilizing transformer core of this utility model has the following advantages:
[0009] 1. The window area is not limited by the transverse yoke, facilitating design adjustments. This utility model's iron core allows for arbitrary lengthening or shortening of the window according to actual engineering needs, simplifying core design and reducing design and mold costs.
[0010] 2. High material utilization rate. The iron core of this utility model is made of F-shaped iron chips and strip iron chips stacked together, which can significantly reduce the width of the raw material, make full use of the scrap material, simplify the punching and cutting dies in production, reduce the tonnage of the punch press, and save energy.
[0011] 3. The core of this utility model is fixed using insulating clamps and double-ended screws with fiberglass sleeves, further preventing eddy currents formed between the double-ended screws, the core, and the clamps. This reduces the current load on the transformer primary, saves energy, and improves the efficiency of the voltage regulator. Furthermore, it minimizes...
[0012] The heat generated by the transformer reduces the temperature rise of the voltage regulator.
[0013] 4. Easy to install and debug, simple design. The iron chip is manufactured in one piece, and the magnetic circuit gap can be adjusted according to the discreteness of the stacking to adjust the compensation of the transformer, achieving consistent voltage regulation, high accuracy, and shortening debugging time. Furthermore, due to its simple design and ease of manufacturing, it saves time and reduces costs, making it particularly suitable for single-phase high-power voltage stabilizing transformers.
[0014] The present invention will now be described in further non-limiting detail with reference to the accompanying drawings and embodiments. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the shearing structure of the existing EI-type iron chip;
[0016] Figure 2 This is a schematic diagram of the overlapping state of existing EI-type iron chips;
[0017] Figure 3.1 , 3.2 These are front and top views (with insulating clamps) of the core structure of this utility model.
[0018] Figure 4 This is a schematic diagram of the core structure of the iron core of this utility model.
[0019] Figure 5 This is a schematic diagram of the overlapping state of the iron chips in the iron core of this utility model;
[0020] Figure 6 This is a schematic diagram of the cutting structure of the F-shaped and I-shaped iron chip core of this utility model; Figure 7 This is a schematic diagram of the shearing structure of the I-shaped iron chip in the iron core of this utility model;
[0021] Figure 8 The present invention includes an insulating clamp, nut, double-ended screw, and fiberglass sleeve used for fixing the iron core;
[0022] In each figure, 1 and 2 are E-shaped iron chips of the existing EI type iron core, 3 and 4 are I-shaped iron chips of the existing iron core, 11 is F-shaped iron core of the present invention, 21 is I1 long strip iron core of the above-mentioned iron core, 31 is I2 short strip iron core of the above-mentioned iron core, 41 is I3 block iron core of the above-mentioned iron core, 51 is the gap on the magnetic circuit iron core, 12, 22, and 32 are fixing holes on the iron chip, Wi represents a large rectangular window, W2 represents a small rectangular window, 61 represents the cut-off iron chip, 71 is an I-type insulating plate, 72 is a fixing hole on the insulating plate, 81 is a double-ended screw, 82 is a nut, and 83 is a glass fiber sleeve. Detailed Implementation
[0023] First, design the cutting scheme for the iron chip. Based on the design parameters, on a rectangular silicon steel sheet, such as... Figure 6 , Figure 7 As shown, a rectangular iron chip is cut into several iron chips, including an F-shaped iron chip 11, a short strip iron chip 31 (I2), and a block-shaped iron chip (I3), and then arranged according to... Figure 5The overlapping state shown is illustrated. Another type of long strip iron chip 21 (I1) is prepared. Fixing holes are set on each of the aforementioned iron chips, as shown in the figure. Fixing hole 12 is on the F-shaped iron chip 11, fixing hole 22 is on the I1 long strip iron chip 21, and fixing hole 32 is on the I2 short strip iron chip 31. Fixing holes are not required on the I3 block iron core 41. The insulating clamp has a fourth fixing hole 72. The remaining iron chip 61 after cutting is used for other purposes. Figure 5 As shown, the aforementioned iron chips 11, 21, 31, and 41 are assembled into a new rectangular iron core block. This block contains two windows, large window W1 and small window W2, with equal widths but unequal lengths. A gap 51 is left between the F-shaped piece 11 and the block-shaped piece 41. The assembled iron chips are then stacked in multiple layers to form a structure as shown. Figure 4 The combined iron core shown is secured with nails in each fixing hole, then fixed with insulating clamps at the top and bottom of F-type plate 11 and I-type plate 21. After removing the nails one by one, it is tightened with double-ended screws with fiberglass sleeves. This process produces the combined window voltage stabilizer transformer core of this utility model. Figure 4 As shown, it has a large rectangular window W1 that forms the main magnetic circuit of the transformer core; and a small rectangular window W2 that forms the secondary magnetic circuit core, with a gap 51 on the secondary magnetic circuit core. By adjusting this gap, the voltage regulation compensation curve and compensation amount of the transformer can be changed. It also facilitates increasing the core length or lengthening the window during design, bringing many conveniences to production and debugging. This utility model of a window-type voltage-regulating transformer core is suitable for various types of voltage-regulating transformers.
Claims
1. A composite window-type voltage regulator transformer core, characterized in that it is a transformer core with a rectangular window formed by stacking and splicing multiple layers of iron sheets, wherein... The transformer core with rectangular windows is assembled from an F-shaped core (11) with fixing holes and the same layer thickness, an I1 long strip core (21), an I2 short strip core (31), and an I3 block core (41), as well as double-headed screws (81) and nuts (82) for four I long strip insulating clamps (71) and glass fiber sleeves (83) to form a transformer core with a large rectangular window (W1) and a small rectangular window (W2). The part with the large rectangular window (W1) constitutes the main magnetic circuit of the transformer core, and the part with the small rectangular window (W2) constitutes the sub-magnetic circuit of the core. A gap (51) is provided on the core of the sub-magnetic circuit.
2. The combined window-type voltage regulator core according to claim 1, characterized in that, The large rectangular window (W1) and the small rectangular window (W2) have the same width.
3. The combined window voltage regulator core according to claim 1 or 2, characterized in that, The F-shaped iron core (11) is provided with a first fixing hole (12), the I1 long strip iron core (21) is provided with a second fixing hole (22), the I2 short strip iron core (31) is provided with a third fixing hole (32), the insulating clamp is provided with a fourth fixing hole (72), and the screw of the fixing screw is equipped with a glass fiber sleeve (83).