Iron core assembly and ac contactor
By installing a short-circuit ring on the extension of the stationary iron core and fixing it with positioning components, the problem of the iron core attraction disappearing when the AC power supply current is zero is solved, thus achieving stable on/off control and saving production costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SCHNEIDER ELECTRIC IND SAS
- Filing Date
- 2025-07-10
- Publication Date
- 2026-06-19
AI Technical Summary
When the AC power supply current is zero, the electromagnetic attraction between the iron cores of the existing AC contactor disappears, causing the on/off control to fail, and modifying the circuit or structure increases production costs.
A combination of a T-shaped moving iron core and a stationary iron core is used. By fitting a short-circuit ring on the extension of the stationary iron core and fixing it with positioning components, the electromagnetic attraction force is kept non-zero when the AC power supply current is zero.
Without altering the original structure, the electromagnetic attraction between the iron cores is maintained, saving production costs and achieving stable on/off control.
Smart Images
Figure CN224384204U_ABST
Abstract
Description
Technical Field
[0001] Embodiments of this disclosure relate to the field of electrical equipment, and more specifically to a core assembly and an AC contactor. Background Technology
[0002] An AC contactor is a widely used device for switching and controlling electrical circuits. An AC contactor generally consists of an electromagnetic system (coil and iron core) and a contact system (normally open and normally closed contacts). When the contactor's coil is energized, the magnetic field generated causes the iron core to move, thereby controlling the on / off state of the circuit. Utility Model Content
[0003] In a first aspect of this disclosure, a core assembly is provided, comprising: a T-shaped moving core including a first base and a protrusion extending from the first base; a stationary core including a second base and a pair of extensions coupled to opposite sides of the second base and extending in a direction away from the second base, a groove formed by the second base and the pair of extensions surrounding the protrusion; and a short-circuit ring sleeved on a single extension of the pair of extensions.
[0004] According to embodiments of the present disclosure, by fitting a short-circuit ring onto a single extension of the stationary core, the electromagnetic attraction between the T-shaped moving core and the stationary core is not zero even when the current of the AC power supply is zero.
[0005] In one embodiment, the stationary core further includes a pair of abutting portions, which are respectively disposed at the ends of the pair of extensions opposite to the second base and extend toward each other, with the pair of abutting portions abutting against the bottom of the first base.
[0006] In one embodiment, a positioning hole is provided on a single extension, and a pair of through holes are provided on opposite sides of the short-circuit ring. The core assembly also includes a positioning element that passes through the positioning hole and the pair of through holes to couple the short-circuit ring to the single extension.
[0007] In one embodiment, the positioning hole extends along the thickness direction of the single extension.
[0008] In one embodiment, a single extension is further provided with a first positioning groove and a second positioning groove for engaging a short-circuit ring. The first positioning groove is located adjacent to the positioning hole and is disposed on the inner side of the single extension and extends along the thickness direction of the single extension. The second positioning groove is located adjacent to the positioning hole and is disposed on the outer side of the single extension and extends along the thickness direction of the single extension.
[0009] In one embodiment, the positioning element is a rivet.
[0010] In one embodiment, the short-circuit ring is rectangular.
[0011] In a second aspect of this disclosure, an AC contactor is provided, comprising: the core assembly of the first aspect of this disclosure.
[0012] It should be understood that the content described in this section is not intended to limit the key or essential features of the embodiments of this disclosure, nor is it intended to restrict the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description
[0013] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. In the drawings, the same or similar reference numerals denote the same or similar elements, wherein:
[0014] Figure 1 A schematic diagram of the structure of a core assembly according to an embodiment of the present disclosure is shown;
[0015] Figure 2 A schematic diagram of the structure of a T-shaped iron core and a stationary iron core according to an embodiment of the present disclosure is shown;
[0016] Figure 3 A schematic diagram of a short-circuit ring according to an embodiment of the present disclosure is shown; and
[0017] Figure 4 A schematic diagram of the assembly of a core assembly and a contactor coil according to an embodiment of the present disclosure is shown.
[0018] Explanation of reference numerals in the attached figures:
[0019] 1. T-shaped moving iron core 2. Stationary iron core
[0020] 3 Short-circuit ring 4 Positioning component
[0021] 11 First base 12 Protrusion
[0022] 21 Second base 22 Extension
[0023] 23 Abutting part 20 Groove
[0024] 220 Positioning hole 221 First positioning groove
[0025] 222 Second positioning groove X thickness direction
[0026] 5. Contactor coil Detailed Implementation
[0027] Embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.
[0028] The term "comprising" and its variations as used herein signify open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "at least partially based on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc., may refer to different or the same objects.
[0029] As described above, an AC contactor generally consists of an electromagnetic system (coil and core) and a contact system (normally open and normally closed contacts). The magnetic field generated when the contactor coil is energized causes the core to move, thereby controlling the on / off state of the circuit.
[0030] Conventional contactors typically use an E-shaped or T-shaped moving iron core in conjunction with a stationary iron core. To maintain the electromagnetic attraction between the iron cores when the AC current crosses zero, the contactor coil circuit is usually modified or short-circuit rings are installed on both sides of the stationary iron core. However, this approach requires modifications to the circuit or iron core assembly structure, which increases production costs and fails to meet the cost control requirements of actual working scenarios.
[0031] This disclosure provides an iron core assembly comprising: a T-shaped moving iron core, the T-shaped moving iron core including a first base and a protrusion, the protrusion protruding from the first base; a stationary iron core, the stationary iron core including a second base and a pair of extensions, the pair of extensions coupled to opposite sides of the second base and extending away from the second base, a groove formed by the second base and the pair of extensions surrounding the protrusion; and a short-circuit ring, the short-circuit ring being sleeved on a single extension of the pair of extensions. With this arrangement, only a single short-circuit ring is needed to ensure that the electromagnetic attraction between the T-shaped moving iron core and the stationary iron core is not zero even when the current of the AC power supply is zero, thus retaining the original structure of the iron core assembly while significantly reducing production costs. In the following, [further details will be provided]. Figures 1 to 4 The principles of this disclosure are described.
[0032] Figure 1 A schematic diagram of the structure of a core assembly according to an embodiment of the present disclosure is shown. Figure 1As shown, the core assembly described herein generally includes a T-shaped moving core 1, a stationary core 2, and a short-circuit ring 3. The T-shaped moving core 1 includes a first base 11 and a protrusion 12. The protrusion 12 protrudes from the first base 11. The stationary core 2 includes a second base 21 and a pair of extensions 22. The pair of extensions 22 are coupled to opposite sides of the second base 21 and extend in a direction away from the second base 21. A groove 20 formed by the second base 21 and the pair of extensions 22 surrounds the protrusion 12. The short-circuit ring 3 is fitted onto a single extension 22 of the pair of extensions 22.
[0033] In one embodiment, the T-shaped moving iron core 1 and stationary iron core 2 can be formed by stacking and riveting multiple iron chips. Each iron chip can be made of silicon steel to effectively reduce eddy current phenomena, thereby reducing heat generation and increasing power density. Insulating varnish can also be applied between each iron chip to ensure insulation and reduce eddy current losses. It should be understood that, based on the teachings given in this disclosure, those skilled in the art can conceive of other types of T-shaped moving and stationary iron cores to achieve the above functions, and these implementations all fall within the scope of this disclosure.
[0034] Continue to refer to Figure 1 In one embodiment, the stationary core 2 further includes a pair of abutting portions 23. The pair of abutting portions 23 are respectively provided at the ends of the pair of extension portions 22 opposite to the second base portion 21 and extend toward each other. When the pair of abutting portions 23 abut against the bottom of the first base portion 11, the protrusion 12 of the T-shaped moving core 1 abuts against the top of the second base portion 21 of the stationary core 2.
[0035] Figure 2 A schematic diagram of the structure of a T-shaped iron core 1 and a stationary iron core 2 according to an embodiment of the present disclosure is shown. Figure 3 A schematic diagram of a short-circuit ring according to an embodiment of the present disclosure is shown. In one embodiment, such as... Figure 2 As shown, a positioning hole 220 is provided on a single extension 22 of the stationary iron core 2. Correspondingly, as Figure 3 As shown, paired through holes 30 are provided on opposite sides of the short-circuit ring 3. In one embodiment, reference... Figures 1 to 3 The core assembly may also include a positioning element 4. The positioning element 4 passes through a positioning hole 220 and a pair of through holes 30 to couple the short-circuit ring 3 to a single extension 22.
[0036] In one embodiment, the positioning element 4 may be a rivet. The rivet couples the short-circuit ring 3 to a predetermined position on the individual extension 22 and prevents the short-circuit ring 3 from displacing in the thickness direction X of the individual extension 22. It should be understood that, based on the teachings of this disclosure, those skilled in the art will conceive of other types of positioning elements that achieve the above functions, such as bolts, and these implementations all fall within the scope of this disclosure.
[0037] Continue to refer to Figures 1 to 3 In one embodiment, the positioning hole 220 extends along the thickness direction X of the individual extension 22. With this arrangement, the positioning member 4 can pass through the paired through holes 30 and be inserted into the positioning hole 220 along the thickness direction X of the individual extension 22 to couple the short-circuit ring 3 to the individual extension 22. It should be understood that the positioning hole 220 may also extend in other directions, such as the width direction of the individual extension 22. Based on the teachings given in this disclosure, those skilled in the art will conceive of other ways to couple the short-circuit ring to any individual extension of the stationary core, and these implementations all fall within the scope of this disclosure.
[0038] In one embodiment, such as Figure 1 and Figure 2 As shown, a first positioning groove 221 and a second positioning groove 222 for engaging the short-circuit ring 3 can be provided on a single extension 22 of the stationary iron core 2. The first positioning groove 221 is located adjacent to the positioning hole 220 on the inner side of the single extension 22 and extends along the thickness direction X of the single extension 22. The second positioning groove 222 is located adjacent to the positioning hole 220 on the outer side of the single extension 22 and extends along the thickness direction X of the single extension 22. By providing the first positioning groove 221 and the second positioning groove 222, the short-circuit ring 3 can be further coupled to the single extension 22. The position and size of the first positioning groove 221 and the second positioning groove 222 can be determined according to actual working requirements, and this disclosure does not impose any limitations on this.
[0039] In one embodiment, the short-circuit ring 3 is rectangular. Correspondingly, the first positioning groove 221 and the second positioning groove 222 can be rectangular grooves to facilitate the short-circuit ring 3 engaging with the first positioning groove 221 and the second positioning groove 222. It should be understood that, based on the teachings given in this disclosure, those skilled in the art can conceive of other types of short-circuit rings and positioning grooves to achieve the above functions, and these implementations all fall within the scope of this disclosure. By drilling and slotting on a single extension 22 of the stationary core 2, the original structure of the core can be preserved as much as possible and manufacturing can be facilitated, while the short-circuit ring 3 can be effectively positioned.
[0040] Figure 4 A schematic diagram of the assembly of a core assembly and a contactor coil 5 according to an embodiment of the present disclosure is shown. In one embodiment, such as Figure 4 As shown, the contactor coil 5 is disposed within the groove 20 and surrounds the protrusion 12 of the T-shaped moving iron core 1. When the magnitude of the alternating current in the contactor coil 5 is zero, the magnetic flux generated by the short-circuit ring 3 enables a non-zero electromagnetic attraction between the T-shaped moving iron core 1 and the stationary iron core 2 to maintain their attraction.
[0041] In one embodiment, the short-circuit ring 3 may be made of copper. It should be understood that the short-circuit ring 3 may also be made of any suitable type of material, such as non-magnetic materials like nickel-chromium alloys, and this disclosure does not impose any limitations on this.
[0042] According to the embodiments of this disclosure, the core assembly can achieve a non-zero electromagnetic attraction between the T-shaped moving core and the stationary core by setting only a single short-circuit ring, even when the current of the AC power supply is zero. This retains the original structure of the core assembly while greatly saving production costs.
[0043] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.
Claims
1. A core assembly, characterized in that, include: T-shaped moving iron core (1), the T-shaped moving iron core (1) includes a first base (11) and a protrusion (12), the protrusion (12) protruding from the first base (11); A stationary iron core (2) includes a second base (21) and a pair of extensions (22), the pair of extensions (22) being coupled to opposite sides of the second base (21) and extending in a direction away from the second base (21), and a groove (20) formed by the second base (21) and the pair of extensions (22) surrounding the protrusion (12); as well as A short-circuit ring (3) is fitted onto a single extension (22) of the paired extensions (22).
2. The core assembly according to claim 1, characterized in that, The stationary iron core (2) also includes a pair of abutting portions (23), which are respectively disposed at the ends of the pair of extension portions (22) away from the second base portion (21) and extend toward each other, and the pair of abutting portions (23) abut against the bottom of the first base portion (11).
3. The core assembly according to claim 1, characterized in that, The single extension (22) is provided with a positioning hole (220), and the short-circuit ring (3) is provided with a pair of through holes (30) on opposite sides. The core assembly also includes a positioning member (4), which passes through the positioning hole (220) and the pair of through holes (30) to couple the short-circuit ring (3) to the single extension (22).
4. The core assembly according to claim 3, characterized in that, The positioning hole (220) extends along the thickness direction (X) of the single extension (22).
5. The core assembly according to claim 4, characterized in that, The single extension (22) is also provided with a first positioning groove (221) and a second positioning groove (222) for engaging the short-circuit ring (3). The first positioning groove (221) is located on the inner side of the single extension (22) adjacent to the positioning hole (220) and extends along the thickness direction (X) of the single extension (22). The second positioning groove (222) is located on the outer side of the single extension (22) adjacent to the positioning hole (220) and extends along the thickness direction (X) of the single extension (22).
6. The core assembly according to claim 3, characterized in that, The positioning element (4) is a rivet.
7. The core assembly according to any one of claims 1 to 6, characterized in that, The short-circuit ring (3) is rectangular.
8. An AC contactor, characterized in that, Includes the core assembly according to any one of claims 1 to 7.