Transformer iron core capable of reducing no-load loss through multi-screw fastening

Abstract

The utility model discloses a multi-screw fastening transformer iron core capable of reducing no-load loss, which comprises an iron core body, and the iron core body is clamped by a clamping piece and consists of an upper yoke, a lower yoke and a core column; the upper half portion of the core column is of a multi-section type core structure, air gap insulating plates are clamped between the adjacent core structures and between the core structures and the upper yoke respectively, and the core structures, the upper yoke and the lower yoke are connected in a penetrating mode through at least one insulating screw to form a multi-screw fastening iron core structure. According to the utility model, the upper half part of the core column of the iron core is segmented and fastened by the multiple screws, so that the magnetic saturation phenomenon of the iron core is reduced, the local magnetic flux density change caused by looseness or vibration is reduced, and the no-load loss is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to transformer iron core technical field especially relates to the transformer iron core of many screw rod fastening reduces no load loss. BACKGROUND

[0002] In transformer iron core, the unreasonable design of air gap and the insufficient stability of iron core can affect the magnetic flux, cause the no load loss to be too high, limit the operation efficiency and reliability of transformer, especially under the condition of high frequency or high current, the unreasonable setting of air gap can lead to the increase of leakage inductance, and the insufficient structural stability can cause the iron core to loosen and the noise to increase, which significantly increases the no load loss. SUMMARY

[0003] The utility model discloses a transformer iron core of many screw rod fastening reduces no load loss, which overcomes the defects in the prior art, reduces the magnetic saturation of the iron core by fastening the upper half of the core column with multiple screw rods, and reduces the no load loss.

[0004] Technical scheme: To achieve the above object, the utility model discloses a transformer iron core of many screw rod fastening reduces no load loss, which comprises an iron core body, the iron core body is clamped by an upper yoke, a lower yoke and a core column through a clamp, and the core column is divided into multiple segments.

[0005] The upper half of the core column is a multi-segment core structure, air gap insulating plates are clamped between adjacent core structures and between the core structure and the upper yoke, the core structure, the upper yoke and the lower yoke are connected by at least one insulating screw rod, forming a multi-screw rod fastening iron core structure.

[0006] Further, the insulating screw rod comprises a double-end screw rod, a nut and an epoxy coating layer, the epoxy coating layer is wrapped outside the double-end screw rod, and each end of the double-end screw rod is connected with a nut.

[0007] Further, a pressing plate is clamped between the core structure and the lower half of the core column.

[0008] Further, the clamp comprises an upper clamp and a lower clamp, a pair of upper clamps are connected by an upper stainless steel clamp double bolt to clamp the upper yoke of the iron core body, and a pair of lower clamps are connected by a lower stainless steel clamp double bolt to clamp the lower yoke of the iron core body.

[0009] Further, an adjusting pull rod is connected between the upper clamp and the lower clamp on the same side of the iron core body, the adjusting pull rod can be adjusted to control the compression amount of the air gap insulating plate, and the size of the air gap of the iron core body can be adjusted.

[0010] Further, the insulating screw rod on the upper yoke connects the upper clamp; the insulating screw rod on the lower yoke connects the lower clamp.

[0011] Further, the bottom of the lower clamp is provided with a bottom foot supporting the transformer core.

[0012] Beneficial effects: the utility model discloses a multi -screw fastening reduces no -load loss's transformer core through adopting multistage core structure in the upper half of the core column, and sets up air gap insulating plate between adjacent core and the core and upper yoke, and the setting of air gap can also control inductance, makes the coil characteristic less dependence on magnetic core material, can effectively reduce the magnetic saturation phenomenon of core, cooperates the stability structural characteristics of multi -screw, reduces the influence of loosening and vibration to local magnetic flux density variation, thereby reducing no -load loss. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is whole structure schematic diagram of the utility model;

[0014] Figure 2 It is structure schematic diagram of insulating screw rod. PREFERRED EMBODIMENT

[0015] The utility model makes further explanation in combination with the drawings.

[0016] As Figure 1 Shown, multi -screw fastening reduces no -load loss's transformer core, including core body 1, and the core body 1 is clamped by clamp 2 by upper yoke 11, lower yoke 12 and core column 13 three parts are composed, the upper half of core column 13 is multistage core structure, and air gap insulating plate 3 is set up respectively and clamps between adjacent core structure and the core structure and upper yoke 11, the core structure, upper yoke 11 and lower yoke 12 all are connected through at least one insulating screw rod 4 and are formed multi -screw fastening core structure.The utility model discloses a multi -screw fastening reduces no -load loss's transformer core through adopting multistage core structure in the upper half of core column 13, and sets up air gap insulating plate 3 between adjacent core and the core and upper yoke 11, and the setting of air gap can also control inductance, makes the coil characteristic less dependence on magnetic core material, can effectively reduce the magnetic saturation phenomenon of core, cooperates the stability structural characteristics of multi -screw, reduces the influence of loosening and vibration to local magnetic flux density variation, thereby reducing no -load loss.

[0017] As Figure 2 Shown, the insulating screw rod 4 includes double -end screw rod 41, nut 42 and epoxy coating 43, the epoxy coating 43 is wrapped in double -end screw rod 41 outside, and the both ends of double -end screw rod 41 are respectively hinged with a nut 42.The insulating screw rod 4 adopts the structure of double -end screw rod 41, nut 42 and epoxy coating 43, which guarantees the mechanical strength of the screw rod, and enhances the insulation performance through the epoxy coating 43, avoiding the eddy current loss caused by the conduction of the screw rod.

[0018] More specifically, a pressure plate 5 is provided between the core structure and the lower half of the core column 13 to further enhance the mechanical stability of the iron core and prevent local loosening of the iron core due to vibration during operation, thereby reducing noise and no-load loss.

[0019] like Figure 1 As shown, the clamp 2 includes an upper clamp 21 and a lower clamp 22; a pair of upper clamps 21 are connected by upper stainless steel clamping double bolts 21a to correspondingly clamp the upper yoke 11 of the iron core body 1; a pair of lower clamps 22 are connected by lower stainless steel clamping double bolts 22a to correspondingly clamp the lower yoke 12 of the iron core body 1. Through the separate design of the upper clamp 21 and lower clamp 22, and the use of stainless steel clamping double bolts for connection, clamping force can be applied more evenly, ensuring the overall structural stability of the iron core.

[0020] An adjusting rod 6 is connected between the upper clamp 21 and the lower clamp 22 on the same side of the core body 1. By adjusting the extension or shortening of the adjusting rod 6, the compression amount of the air gap insulation plate 3 can be controlled, thereby adjusting the air gap size of the core body 1. The introduction of the adjusting rod 6 makes the air gap size adjustable, allowing for flexible adjustment of the air gap according to actual operating requirements, further optimizing the magnetic performance of the transformer, and reducing no-load losses. The adjusting rod is made of stainless steel.

[0021] The insulating screw 4 located on the upper yoke 11 is connected to the upper clamp 21; the insulating screw 4 located on the lower yoke 12 is connected to the lower clamp 22. This further enhances the core's fastening effect while avoiding the impact of the screw's conductivity on the transformer's performance.

[0022] The bottom of the lower clamp 22 is provided with a base 7 to support the transformer core. The base 7 provides stable support for the transformer core, enhances the mechanical strength of the overall structure, and facilitates installation and maintenance.

[0023] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A multi-screw fastening transformer core with reduced no-load loss, comprising a core body (1) clamped by a clamp (2) and composed of an upper yoke (11), a lower yoke (12) and a core column (13); characterized in that the upper half of the core column (13) is a multi-section core structure, and an air gap insulation plate (3) is clamped between adjacent core structures and between the core structure and the upper yoke (11); the core structure, the upper yoke (11) and the lower yoke (12) are connected by at least one insulating screw (4) to form a multi-screw fastening core structure.

2. The multi-screw fastened reduced no-load loss transformer core of claim 1, wherein: The insulating screw (4) comprises a double-end screw (41), a nut (42) and an epoxy coating layer (43); the epoxy coating layer (43) is wrapped outside the double-end screw (41), and each end of the double-end screw (41) is connected with the nut (42).

3. The multi-screw fastened reduced no-load loss transformer core of claim 1, wherein: A pressing plate (5) is clamped between the core structure and the lower half of the core column (13).

4. The multi-screw fastened reduced no-load loss transformer core of claim 1, wherein: The clamp (2) comprises an upper clamp (21) and a lower clamp (22); a pair of upper clamps (21) are connected by upper stainless steel clamping double bolts (21a) to clamp the upper yoke (11) of the core body (1); a pair of lower clamps (22) are connected by lower stainless steel clamping double bolts (22a) to clamp the lower yoke (12) of the core body (1).

5. The multi-screw fastened reduced no-load loss transformer core of claim 4, wherein: The upper clamp (21) and the lower clamp (22) on the same side of the core body (1) are connected by an adjusting pull rod (6), which can control the compression amount of the air gap insulation plate (3) by adjusting the length of the adjusting pull rod (6), thereby adjusting the air gap size of the core body (1).

6. The multi-screw fastened reduced no-load loss transformer core of claim 5, wherein: The insulating screw (4) on the upper yoke (11) is connected to the upper clamp (21); the insulating screw (4) on the lower yoke (12) is connected to the lower clamp (22).

7. The multi-screw fastened reduced no-load loss transformer core of claim 4, wherein: The lower clamp (22) is provided with a bottom foot (7) for supporting the transformer core.

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