CN2814633Y

CN2814633Y - Improved ring shape transformer iron core

Info

Publication number: CN2814633Y
Application number: CN 200520057661
Authority: CN
Inventors: 黄汝明
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-04-29
Filing date: 2005-04-29
Publication date: 2006-09-06
Anticipated expiration: 2015-04-29

Abstract

The utility model discloses an improved ring-shaped transformer iron core, which comprises a main body of the ring-shaped iron core. The utility model is characterized in that the inner and outer surfaces of the ring wall of the main body of the ring-shaped iron core are respectively provided with an inner and an outer ring-shaped lug bosses. Because the utility model is provided with the inner and the outer ring-shaped lug bosses, an original 90 DEG rotation angle is changed into the effect of a 45 DEG chamfer. A transition which is from the end face to the surface of the ring wall can be smoothly realized at the time of wire winding. The bending angle of a coil is reduced, produced stress is relatively reduced and the resistance is greatly reduced. When the high-current passes through the utility model, high-heat can not be produced. Meanwhile, the ring-shaped iron core is supported by using a supporting foot so as to carry out installation. Thereby, the heat radiation is accelerated, the safety performance is enhanced and the service life is extended.

Description

Improved ring transformer cores

Technical field

The utility model relates to a kind of improved ring transformer cores.

Background technology

The existing arc welding transformer iron core that is used for is square, adopts the non-directional cold-rolling silicon steel band to make, and forms by its specification requirement annealing again, and its longitudinal cross-section is square.The power of this class arc welder is very big, therefore the winding wire footpath that is wound on the annular core is very thick, and winding wire astragal footpath is between φ 2.5-3.0mm, because the longitudinal cross-section of existing iron core is square, the corner position must be 90 °, be difficult to during coiling curve, and the angle that curves is big more, then the stress of Chan Shenging is big more, resistance also can be big more, when big electric current by the time can produce high heat, unfavorable to transformer device, fail safe is not high.In addition, annular core generally is to be that supporting surface is positioned in the complete machine casing with its end face, be unfavorable for heat radiation, and winding coil is worn easily.

Summary of the invention

For addressing the above problem, the purpose of this utility model provides a kind of improved ring transformer cores, and it is safe in utilization, can not produce high heat and rapid heat dissipation.

The purpose of this utility model is achieved in that a kind of improved ring transformer cores, comprises the annular core main body, it is characterized in that: be respectively equipped with inside and outside annular boss on the inside and outside surface of the ring wall of described annular core main body.

Described annular core main body is provided with the splayed feet.

Described feet comprises interior spacer, securing member and outside fix sheet, and interior spacer and outside fix sheet are connected the ring wall of the annular core main body that is fixedly clamped by securing member.

Described annular core main body is by the circular ring of the different inside and outside annular boss of single directional cold-rolling silicon steel roll coil of strip coiled band of width.

Described inside and outside annular boss height equates or does not wait.

The thickness of described inside and outside annular boss equals the distance between its boss plane and the annular core main body end face respectively.

The annular thickness of described annular core main body is 0.3-0.5 with the ratio of height.

The annular thickness of described annular core main body and ratio preferred 0.382 highly.

The utility model is by being provided with inside and outside annular boss, make original 90 ° corner position become the effect of chamfering at 45, can realize the transition of end face smoothly during coiling, reduce the angle that curves of coil, the corresponding minimizing of the stress of generation to the ring wall surface, resistance also significantly reduces, when big electric current by the time can just can not produce high heat again, utilize feet that annular core is supported installation simultaneously, accelerate heat radiation, security performance improves greatly, and prolong useful life.

Description of drawings

Fig. 1 is a front view of the present utility model;

Fig. 2 is the A-A profile of Fig. 1;

Fig. 3 is the annular core main body axial section of the utility model list core structure.

Embodiment

Shown in Fig. 1-2, the utility model is a kind of improved ring transformer cores, comprises annular core main body 1 and feet 2.

Feet 2 comprises interior spacer 21, securing member 22 and outside fix sheet 23, interior spacer 21 is located at ring in the iron core main body 1, outside fix sheet 23 is located at iron core main body 1 outer shroud, the two ends of interior spacer 21 and outside fix sheet 23 are connected by securing member 22 respectively, the ring wall of the annular core main body 1 that can be fixedly clamped need not hole on iron core main body 1 or weld.Feet 2 is splayed, and outside fix sheet 23 forms supporting points, annular core main body 1 can be crouched to put (axis level) and be installed in the complete machine casing, is beneficial to heat radiation, and winding coil can not wear and tear because of the contact casing simultaneously.

Annular core main body 1 is to adopt the different single directional cold-rolling silicon steel roll coil of strip of width to make annular, forms by its specification requirement annealing again.Roll narrower steel band when rolling earlier, roll the steel band of broad again, roll narrower steel band at last, thereby on the inside and outside surface of the ring wall of annular core main body 1, form inside and outside

annular boss

12,11 respectively, promptly then form inside and outside two annular grooves at iron core main body 1 end face.The height of inside and outside

annular boss

12,11 equates or does not wait (deciding according to the width of steel band that rolls).Under the nondecreasing situation of sectional area, for reducing core volume and weight to greatest extent, save material, increase magnetic flux, aspect ratio outer ring boss 11 height of annular boss 12 in can being designed to.The thickness of inside and outside

annular boss

12,11 can equal the distance between its boss plane and annular core main body 1 end face respectively, makes coiling become the optimum efficiency with 45 ° of chamferings by original 90 ° of corner positions.Line of fall window diameter in the middle of the annular core main body 1 is by actual glass envelope curve diameter and decide, and general 10 kilowatts arc welding transformer is 9-10cm, and 15 kilowatts and above person are 10-12cm.Annular core main body 1 can adopt single core structure (10 kilowatts arc welding transformer be suitable for) or double-iron core structure (15 kilowatts and above arc welding transformer be suitable for).The double-iron core structure is more conducive to heat radiation, and the gap between two iron cores is 0.5-1 centimetre (as Fig. 2).The annular thickness of annular core main body 1 (theoretical value) is 0.3-0.5 with the ratio of height, and optimum value is 0.382 (golden section ratio).Because the influence of the height thickness of wrap factor and inside-and-outside ring boss, when therefore reality was made the annular core main body, its profile thickness must be bigger than theoretic throat.Figure 3 shows that example, annular core main body 1 is single core structure, highly is 10cm, and theoretic throat gets 0.382 with the ratio of height, and wrap factor is 0.9-0.93.Outer ring boss 11 high 8cm, thick 1cm, sectional area are 8cm ², interior annular boss 12 high 9cm, thick 0.5cm, sectional area are 4.5cm ²This moment, exterior cross-section was amassed=height * 0.382/ wrap factor * height=10 * 0.382/0.93 * 10=41cm ², the profile thickness of the then actual annular core main body that makes=(exterior cross-section is amassed-Nei annular boss sectional area-outer ring boss sectional area)/highly+interior annular boss thickness+outer ring boss thickness=(41-8-4.5)/10+1+0.5=4.35cm.

Claims

1. an improved ring transformer cores comprises annular core main body (1), it is characterized in that: be respectively equipped with inside and outside annular boss (12,11) on the inside and outside surface of ring wall of described annular core main body (1).

2. improved ring transformer cores according to claim 1 is characterized in that: described annular core main body (1) is provided with splayed feet (2).

3. improved ring transformer cores according to claim 2, it is characterized in that: described feet (2) comprises interior spacer (21), securing member (22) and outside fix sheet (23), and interior spacer (21) and outside fix sheet (23) are connected the ring wall of annular core main body (1) that is fixedly clamped by securing member (22).

4. improved ring transformer cores according to claim 1 is characterized in that: described annular core main body (1) is by the circular ring of the different inside and outside annular boss of single directional cold-rolling silicon steel roll coil of strip coiled band of width.

5. improved ring transformer cores according to claim 1 is characterized in that: described inside and outside annular boss (12,11) highly equates or has a difference in height.

6. improved ring transformer cores according to claim 1 is characterized in that: the thickness of inside and outside annular boss (12,11) equals the distance between its boss plane and annular core main body (1) end face respectively.

7. improved ring transformer cores according to claim 1 is characterized in that: the annular thickness of described annular core main body (1) is 0.3-0.5 with the ratio of height.

8. improved ring transformer cores according to claim 7 is characterized in that: the annular thickness of described annular core main body (1) and ratio preferred 0.382 highly.

9. improved ring transformer cores according to claim 1 is characterized in that: described annular core main body (1) is single core structure or double-iron core structure.

10. improved ring transformer cores according to claim 9 is characterized in that: the gap between two iron cores of described double-iron core structure is 0.5-1 centimetre.