CN219163277U - Contactor and alternating current electromagnetic system thereof - Google Patents
Contactor and alternating current electromagnetic system thereof Download PDFInfo
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- CN219163277U CN219163277U CN202222558229.XU CN202222558229U CN219163277U CN 219163277 U CN219163277 U CN 219163277U CN 202222558229 U CN202222558229 U CN 202222558229U CN 219163277 U CN219163277 U CN 219163277U
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Abstract
The application discloses a contactor and an alternating current electromagnetic system thereof, and the system is applied to the contactor and comprises an iron core and a three-phase winding. The iron core comprises a plurality of poles; the three-phase winding is arranged on the iron core and connected with alternating current mains supply for receiving three-phase alternating current. The scheme of the application adopts the three-phase winding, although the iron core is not provided with a short circuit ring, each phase of the three-phase winding naturally differs by 120 degrees in electric angle, so that magnetic fluxes generated in a magnetic circuit also have the same phase difference, electromagnetic attraction which is not provided with a zero point and has the minimum value larger than the counter force of a contactor is generated, and the production cost of the contactor can be reduced on the basis of solving the inherent electromagnetic vibration problem of an alternating current electromagnetic system.
Description
Technical Field
The present application relates to the field of electrical power equipment technology, and more particularly, to a contactor and an ac electromagnetic system thereof.
Background
The contactor is an electric element for providing electric power on-off control, and is an important device in an electric power system, wherein the medium alternating current electromagnetic system is used for providing electromagnetic driving force for the contactor and consists of an iron core, a coil arranged on the iron core and an armature which is matched with the iron core, when the coil is electrified, the current can generate an electromagnetic field in the iron core, the electromagnetic field can attract the armature to act, the armature is connected with a contact in the contactor through a corresponding component, and the contact is driven to act when the armature acts, so that the on-off control of electric power is realized.
In view of the alternating current characteristics of alternating current, the suction force generated by the current fed into the coil is pulsating, and the suction force is zero because of zero voltage current existing in the alternating current, so that the iron core of the alternating current electromagnetic system inevitably vibrates under the combined action of counter force and suction force of the contactor. This vibration can accelerate the damage to the relevant parts, and in severe cases even lead to bouncing of the contacts, which in turn can cause rapid wear and fusion of the contacts.
In order to solve the vibration problem, the current contactor generally adopts a short circuit ring added on an iron core, and utilizes the characteristic that magnetic fluxes inside and outside the short circuit ring are not crossed simultaneously to make the resultant electromagnetic attraction force larger than the counter force of the contactor so as to eliminate the vibration, as shown in fig. 1 and 2. However, the process of shorting the ring is very complex, which itself and the installation process inevitably increase the production cost of the contactor.
Disclosure of Invention
In view of the foregoing, the present application provides a contactor and an ac electromagnetic system thereof for reducing the production cost of the contactor.
In order to achieve the above object, the following solutions have been proposed:
an ac electromagnetic system for use with a contactor, the ac electromagnetic system comprising an iron core and a three-phase winding, wherein:
the iron core comprises a plurality of poles;
the three-phase windings are wound on the pole posts of the iron core respectively and are connected with alternating current mains supply for receiving three-phase alternating current.
Optionally, the number of the polar posts is three.
Optionally, each phase winding is wound on one of the poles.
Optionally, the three-phase winding is wound on one of the poles.
Optionally, the three-phase winding is wound on the middle pole.
Optionally, the three-phase winding is wound on the pole on one side.
Optionally, the number of the polar posts is two.
Optionally, the three-phase winding is wound on one of the poles or on two of the poles respectively.
Optionally, the three-phase windings are in star connection or delta connection.
A contactor, characterized in that it is provided with an ac electromagnetic system as described above.
From the technical scheme, the application discloses a contactor and an alternating current electromagnetic system thereof, and the system is applied to the contactor and comprises an iron core and a three-phase winding. The iron core comprises a plurality of poles; the three-phase winding is wound on the pole of the iron core and is connected with alternating current mains supply for receiving three-phase alternating current. The scheme of the application adopts the three-phase winding, although the iron core is not provided with a short circuit ring, each phase of the three-phase winding naturally differs by 120 degrees in electric angle, so that magnetic fluxes generated in a magnetic circuit also have the same phase difference, electromagnetic attraction which is not provided with a zero point and has the minimum value larger than the counter force of a contactor is generated, and the production cost of the contactor can be reduced on the basis of solving the inherent electromagnetic vibration problem of an alternating current electromagnetic system.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a core with shorting rings;
FIG. 2 is a schematic view of a contactor provided with a core with shorting rings;
fig. 3 is a schematic diagram of an iron core of an ac electromagnetic system according to an embodiment of the present application;
FIG. 4 is a schematic diagram of a three-phase winding according to an embodiment of the present application;
FIG. 5 is a wiring diagram of a three-phase winding according to an embodiment of the present application;
fig. 6 is another wiring diagram of a three-phase winding according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
Example 1
Fig. 3 is a schematic diagram of an iron core of an ac electromagnetic system according to an embodiment of the present application.
The present embodiment provides an ac electromagnetic system including an iron core 100 and three-phase windings. Wherein the core, as shown in fig. 3, comprises a plurality of poles 101, on which no shorting ring is arranged.
As shown in fig. 4, the three-phase winding includes a first winding X 1 Second winding X 2 And a third winding X 3 . The three-phase windings are respectively wound on the pole posts of the iron core and are connected with a three-phase mains supply, and are used for generating an electromagnetic field based on three-phase alternating current conveyed by the three-phase mains supply, and the armature is enabled to act through the electromagnetic field, so that the contactor is controlled.
The core includes two or three poles, one for example, with each winding wound on one pole. In addition, the three-phase winding and the winding can be wound on the same pole, and the pole and the armature form a closed magnetic circuit, so that the utility model aim of the application can be achieved, and the process can be simplified. When disposed on one pole, it is preferable to wind and sandwich the pole.
As can be seen from the above technical solution, the present embodiment provides an ac electromagnetic system, which is applied to a contactor and includes an iron core and a three-phase winding. The iron core comprises a plurality of poles; the three-phase winding is wound on the pole of the iron core and is connected with alternating current mains supply for receiving three-phase alternating current. The scheme of the application adopts the three-phase winding, although the iron core is not provided with a short circuit ring, each phase of the three-phase winding naturally differs by 120 degrees in electric angle, so that magnetic fluxes generated in a magnetic circuit also have the same phase difference, electromagnetic attraction which is not provided with a zero point and has the minimum value larger than the counter force of a contactor is generated, and the production cost of the contactor can be reduced on the basis of solving the inherent electromagnetic vibration problem of an alternating current electromagnetic system.
The three-phase windings in the present application are star-connected, as shown in fig. 5, and may also be delta-connected, as shown in fig. 6.
Example two
The present embodiment provides a contactor provided with the ac electromagnetic system of the previous embodiment, the ac electromagnetic system including an iron core and a three-phase winding. The iron core comprises a plurality of poles; the three-phase winding is wound on the pole of the iron core and is connected with alternating current mains supply for receiving three-phase alternating current. The scheme of the application adopts the three-phase winding, although the iron core is not provided with a short circuit ring, each phase of the three-phase winding naturally differs by 120 degrees in electric angle, so that magnetic fluxes generated in a magnetic circuit also have the same phase difference, electromagnetic attraction which is not provided with a zero point and has the minimum value larger than the counter force of a contactor is generated, and the production cost of the contactor can be reduced on the basis of solving the inherent electromagnetic vibration problem of an alternating current electromagnetic system.
In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described by differences from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other.
While preferred embodiments of the present embodiments have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the present application.
Finally, it is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or terminal device comprising the element.
The foregoing has outlined the detailed description of the preferred embodiment of the present application, and the detailed description of the principles and embodiments of the present application has been provided herein by way of example only to facilitate the understanding of the method and core concepts of the present application; meanwhile, as those skilled in the art will have modifications in the specific embodiments and application scope in accordance with the ideas of the present application, the present description should not be construed as limiting the present application in view of the above.
Claims (10)
1. An ac electromagnetic system for use with a contactor, the ac electromagnetic system comprising an iron core and a three-phase winding, wherein:
the iron core comprises a plurality of poles;
the three-phase windings are wound on the pole posts of the iron core respectively and are connected with alternating current mains supply for receiving three-phase alternating current.
2. The ac electromagnetic system of claim 1 wherein the number of poles is three.
3. The ac electromagnetic system of claim 2 wherein each phase winding is wound on a respective one of said poles.
4. The ac electromagnetic system of claim 2 wherein said three phase windings are wound on the same said pole.
5. The ac electromagnetic system of claim 4 wherein said three phase windings are wound on said intervening poles.
6. The ac electromagnetic system of claim 4 wherein said three-phase winding is wound on said pole on one side.
7. The ac electromagnetic system of claim 1 wherein said poles are two.
8. The ac electromagnetic system of claim 7 wherein said three-phase windings are wound on one of said poles or on both of said poles, respectively.
9. The ac electromagnetic system of claim 1, wherein the three-phase windings are star connected or delta connected.
10. A contactor provided with an ac electromagnetic system according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222558229.XU CN219163277U (en) | 2022-09-27 | 2022-09-27 | Contactor and alternating current electromagnetic system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222558229.XU CN219163277U (en) | 2022-09-27 | 2022-09-27 | Contactor and alternating current electromagnetic system thereof |
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| Publication Number | Publication Date |
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| CN219163277U true CN219163277U (en) | 2023-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222558229.XU Active CN219163277U (en) | 2022-09-27 | 2022-09-27 | Contactor and alternating current electromagnetic system thereof |
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| CN (1) | CN219163277U (en) |
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- 2022-09-27 CN CN202222558229.XU patent/CN219163277U/en active Active
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