Arc starter and welding and cutting equipment
Through the ring core design and the winding structure with the same direction winding, the problem of low coupling coefficient of the existing arc-induced circuit is solved, and an efficient and economical arc-induced effect is achieved, reducing the use of copper wires and equipment volume.
Patent Information
- Application Number
- CN202421142401.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-21
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-05-21
AI Technical Summary
The existing arc-induced circuit has low coupling coefficient, large leakage inductance and low efficiency, resulting in high cost, large volume and high cost of copper wire.
The ring-shaped core design is adopted, and the primary winding and the secondary winding are wound on the core in the same direction. The secondary winding is energized by the primary winding to stimulate the output arc of the secondary winding, and an air gap is formed in the direction of the magnetic core surround to control the saturation of the magnetic core. The copper-clad aluminum wire is used as the secondary winding to reduce magnetic leakage and improve coupling efficiency.
It improves coupling coefficient and arc-induced efficiency, reduces material use, reduces cost, and the equipment is compact and has higher economicality.
Smart Images
Figure CN223070621U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of arc igniters, and particularly relates to an arc igniter and a welding and cutting device. Background Art
[0002] In welding and cutting devices, a high-frequency high-voltage non-contact arc ignition method is often adopted, that is, a high voltage of about 8000V is used to generate an instantaneous arc to break down the air to form an ionization environment, guide the main arc to form a welding circuit, and complete the arc ignition process of argon arc welding; however, the existing arc ignition circuits generally use a magnetic rod arc igniter to boost a high voltage of about 4000V and couple it to the output end. Although the magnetic core is not easily saturated in this way, the coupling coefficient is low, the leakage inductance is large, and the efficiency is low. To achieve the desired effect, more turns are often required, so the cost of copper wire is relatively high, the overall volume is large, and the cost is high. Summary of the Utility Model
[0003] The main purpose of the utility model is to propose an arc igniter and a welding and cutting device, aiming to provide an arc igniter and a welding and cutting device with a high coupling coefficient and high arc ignition efficiency.
[0004] To achieve the above purpose, the arc igniter proposed by the utility model includes:
[0005] A magnetic core, arranged in a ring shape;
[0006] A primary winding, wound around the magnetic core; and,
[0007] A secondary winding, wound around the magnetic core in the same direction as the primary winding.
[0008] In one embodiment, one part of the magnetic core is disconnected along its circumferential direction to form an air gap.
[0009] In one embodiment, the width of the air gap is set to 1mm - 2mm.
[0010] In one embodiment, the secondary winding is wound around the magnetic core for 6 - 10 turns.
[0011] In one embodiment, the number of turns of the primary winding around the magnetic core is half of the number of turns of the secondary winding.
[0012] In one embodiment, the secondary winding includes copper-clad aluminum wire.
[0013] In one embodiment, the primary winding includes:
[0014] A wire, extending from the power source to be wound around the magnetic core;
[0015] A plug spring, arranged at the input end and the output end of the wire;
[0016] A sheath that wraps the wire along the extending direction of the wire from the plug spring; and,
[0017] A cable tie for binding the input end and the output end of the wire.
[0018] The present utility model further provides a welding and cutting device, characterized in that the welding and cutting device includes an arc starter as described in any one of the foregoing.
[0019] The technical solution of the present utility model is to wind the primary winding around the magnetic core; the secondary winding is wound around the magnetic core in the same direction as the primary winding. By energizing the primary winding, an arc is excited in the secondary winding. At the same time, since the magnetic core is arranged in a ring shape, the phenomenon of magnetic leakage is reduced, and the coupling efficiency is greatly improved. Thus, the arc is more easily excited. Description of the Drawings
[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.
[0021] Figure 1 It is a schematic structural diagram of an embodiment of the arc starter provided by the present utility model.
[0022] Explanation of the Reference Numerals in the Drawings:
[0023] 100, arc starter; 1, magnetic core; 11, air gap; 2, primary winding; 21, wire; 22, plug spring; 23, sheath; 24, cable tie; 3, secondary winding.
[0024] The realization of the object, functional features and advantages of the present utility model will be further described in conjunction with the embodiments and with reference to the drawings. Detailed Embodiments
[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model.
[0026] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.
[0027] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes scenario A, or scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.
[0028] In welding and cutting equipment, a high-frequency high-voltage non-contact arc starting method is often adopted, that is, a high voltage of about 8000V is used to generate an instantaneous arc to break down the air to form an ionization environment, guide the main arc to form a welding circuit, and complete the arc starting process of argon arc welding; however, the existing arc starting circuits generally use a magnetic rod arc starter to boost a high voltage of about 4000V and couple it to the output end. Although this method has the advantage that the magnetic core is not easily saturated, the coupling coefficient is low, the leakage inductance is large, and the efficiency is low. To achieve the desired effect, a relatively large number of turns are often required, so the cost of the copper wire is relatively high, the overall volume is relatively large, and the cost is relatively high.
[0029] To solve the above problems, the present utility model proposes an arc starter and a welding and cutting equipment, aiming to provide an arc starter and a welding and cutting equipment with a high coupling coefficient and a high arc starting efficiency. Figure 1 It is a schematic structural diagram of an embodiment provided by the arc starter of the present utility model.
[0030] Please refer to Figure 1 , in an embodiment of the present utility model, the arc starter 100 includes a magnetic core 1, a primary winding 2, and a secondary winding 3; the magnetic core 1 is arranged in a ring shape; the primary winding 2 is wound around the magnetic core 1; the secondary winding 3 is wound around the magnetic core 1 in the same direction as the primary winding 2.
[0031] The technical solution of the present utility model is to wind the primary winding 2 around the magnetic core 1; the secondary winding 3 is wound around the magnetic core 1 in the same direction as the primary winding 2. By energizing the primary winding 2, the secondary winding 3 is excited to output an arc. At the same time, since the magnetic core 1 is annularly arranged, the phenomenon of magnetic leakage is reduced, greatly improving the coupling efficiency. Thus, the arc is more easily excited.
[0032] Further, please refer to Figure 1 , one place of the magnetic core 1 is disconnected along its circumferential direction to form an air gap 11. It can be understood that since the magnetic core 1 is annularly arranged, the coupling coefficient is improved, and the arc ignition efficiency is thus improved. However, due to the annularly arranged magnetic core 1, the magnetic flux in the central part of the magnetic core 1 increases, resulting in the magnetic core 1 being oversaturated, thus affecting the arc quality of the arc igniter 100. Therefore, one place of the magnetic core 1 is disconnected along its circumferential direction to form the air gap 11. The generation of the air gap 11 increases the magnetic resistance of the magnetic core 1, making the magnetic core 1 less likely to be saturated, thus ensuring the arc quality excited by the secondary winding 3.
[0033] Further, the width of the air gap 11 is set to be 1 mm to 2 mm. It can be understood that on the one hand, the excitation efficiency of the arc needs to be ensured, and on the other hand, the quality of the arc also needs to be ensured. Thus, the magnetic core 1 is annularly arranged and the air gap 11 is provided. In order to produce the magnetic core 1 that can best ensure the arc quality, many attempts have been made on the size of the air gap 11. Through exhaustive experiments, it is found that when the width of the air gap 11 is set between 1 mm and 2 mm, it is most capable of balancing the coupling efficiency of the magnetic core 1 and the saturation phenomenon of the magnetic core 1. Through experiments, it is found that when the width of the air gap 11 is greater than 2 mm, the coupling efficiency of the magnetic core 1 drops significantly, thus affecting the excitation efficiency of the arc; when the air gap 11 is less than 1 mm, since the air gap 11 is too small, the magnetic resistance is insufficient, resulting in the magnetic core 1 being oversaturated, thus affecting the arc quality. Therefore, it is preferable that the width of the air gap 11 is maintained between 1 mm and 2 mm. Of course, the most preferred size is 1.5 mm.
[0034] In addition, please refer to Figure 1, the secondary winding 3 winds around the magnetic core 6 to 10 turns. It can be understood that after the magnetic core 1 is arranged in a ring shape, the coupling efficiency of the magnetic core 1 is greatly improved. Therefore, the magnetic core 1 arranged in a ring shape only needs fewer turns of the secondary winding 3 to achieve the same arc excitation efficiency as the prior art, thereby greatly reducing the cost and improving the economy; in the prior art, a generally linear magnetic rod usually requires about 25 turns of the secondary winding 3, while in this embodiment, the secondary winding 3 only needs to wind around the magnetic core 1 for 6 to 10 turns to achieve the same arc excitation efficiency as the magnetic rod. Thus, the material is greatly saved in terms of structure, and it is sufficiently integrated and compact, thereby improving the practicability and economy of the arc igniter 100. In this embodiment, the number of turns of the secondary winding 3 is 8 turns.
[0035] Furthermore, the number of turns of the primary winding 2 winding around the magnetic core 1 is half of the number of turns of the secondary winding 3. Since the primary winding 2 is the input end of the arc igniter 100 and is connected to a low voltage, and the secondary winding 3 is the output end of the arc igniter 100 and is at a relatively high voltage, the number of turns of the primary winding 2 is usually less than that of the secondary winding 3 to achieve the step-up process; in this embodiment, the number of turns of the primary winding 2 winding around the magnetic core 1 is half of the number of turns of the secondary winding 3, that is, the number of turns of the primary winding 2 is 4 turns.
[0036] In addition, the secondary winding 3 includes copper-clad aluminum wire. From the perspective of cost, using copper-clad aluminum wire for the secondary winding 3 is a more economical setting method than using pure copper wire, and the performance of copper-clad aluminum wire is not much worse than that of pure copper wire. In addition, copper-clad aluminum wire is also lighter, has better plasticity, and is easier to process and wind coils.
[0037] In addition, please refer to Figure 1, the primary winding 2 includes a wire 21, a plug 22, a sheath 23 and a cable tie 24; the wire 21 extends from a power source and is wound around the magnetic core 1; the plug 22 is arranged at the input end and the output end of the wire 21; the sheath 23 covers the wire 21 along the extending direction of the wire 21 from the plug 22; the cable tie 24 is used to bundle the input end and the output end of the wire 21. It can be understood that the primary winding 2 and the secondary winding 3 rely on electromagnetic induction, and the primary winding 2 has technical requirements for insulation. Therefore, the primary winding 2 includes the wire 21, the plug 22, the sheath 23 and the cable tie 24; the wire 21 extends from a power source and is wound around the magnetic core 1; the plug 22 is arranged at the input end and the output end of the wire 21; the sheath 23 covers the wire 21 along the extending direction of the wire 21 from the plug 22 for insulation relative to other components; the cable tie 24 is used to bundle the input end and the output end of the wire 21 to make the primary winding 2 appear neat and orderly.
[0038] The present utility model further provides a welding and cutting device, which includes the arc starter 100. The specific structure of the arc starter 100 refers to the above-mentioned embodiments. Since the welding and cutting device adopts all the technical solutions of the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be elaborated here one by one.
[0039] The above are only exemplary embodiments of the present utility model, and do not limit the patent scope of the present utility model. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.
Claims
1. An arc starter, characterized in that, Comprising: A magnetic core, arranged in a ring shape; A primary winding, wound around the magnetic core; A secondary winding, wound around the magnetic core in the same direction as the primary winding; One place of the magnetic core is disconnected along its circumferential direction to form an air gap; The width of the air gap is set to be 1 mm to 2 mm; The number of turns of the primary winding around the magnetic core is half of the number of turns of the secondary winding; and, The secondary winding includes copper-clad aluminum wire.
2. The arc starter according to claim 1, characterized in that, The secondary winding winds around the magnetic core for 6 to 10 turns.
3. The arc starter according to claim 1, characterized in that, The primary winding includes: A wire, extending from a power source to be wound around the magnetic core; A plug spring, arranged at the input end and the output end of the wire; A sheath, covering the wire along the extending direction of the wire from the plug spring; and, A cable tie, used to bundle the input end and the output end of the wire.
4. A welding and cutting device, characterized in that, The welding and cutting equipment includes an arc starter as described in any one of claims 1-3.