CN210467711U - Contactor for improving magnetic flux zero-crossing phenomenon - Google Patents
Contactor for improving magnetic flux zero-crossing phenomenon Download PDFInfo
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- CN210467711U CN210467711U CN201921627083.1U CN201921627083U CN210467711U CN 210467711 U CN210467711 U CN 210467711U CN 201921627083 U CN201921627083 U CN 201921627083U CN 210467711 U CN210467711 U CN 210467711U
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Abstract
The utility model discloses an improve contactor of magnetic flux zero passage, including iron core, armature and three-phase bridge type full control rectifier circuit, the winding has first coil and second coil on the iron core, and first coil is connected with the alternating current electricity, and the second coil passes through three-phase bridge type full control rectifier circuit and is connected with the alternating current electricity, is equipped with the limit switch who links to each other with armature among the three-phase bridge type full control rectifier circuit, and limit switch controls three-phase bridge type full control rectifier circuit and switches on when iron core actuation armature. The utility model discloses can ensure the stable actuation of armature when alternating voltage zero crossing, reduce the vibrations of armature and the production of noise.
Description
Technical Field
The utility model belongs to the technical field of the elevator technique and specifically relates to a be applied to and improve contactor of magnetic flux zero passage phenomenon in elevator.
Background
The contactor is an important component of an automatic control system and is a device capable of quickly completing the closing and opening of a current main loop. With the development of technology, new contactors such as vacuum contactors and semiconductor contactors have been derived, but common contactors have been regarded as important. However, the existing common contactor has the defect that the attraction between the iron core and the armature is unstable. Specifically, after a coil in the contactor is electrified, the iron core controls the armature to attract, so that the opening and closing of the related contact are controlled. Because present contactor is mostly AC contactor, and the magnetic flux zero crossing can inevitably appear in the alternating current, causes armature actuation unstability, and then produces the problem of vibration and noise, and the time is up to the end, causes the wearing and tearing of iron core more easily, influences contactor's life.
In order to solve the problem of zero crossing of magnetic flux, a short circuit ring is added in the prior art so that the magnetic flux is still provided when the alternating current voltage crosses zero, but the quality of the short circuit ring is also uneven due to the uneven processing technology of the short circuit ring, and finally the stable operation of the contactor is still influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's defect, provide a contactor that operation is stable, longe-lived and improve magnetic flux zero passage.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an improve contactor of magnetic flux zero passage phenomenon, includes iron core, armature and three-phase bridge type full control rectifier circuit, the winding has first coil and second coil on the iron core, first coil is connected with the alternating current electricity, the second coil passes through three-phase bridge type full control rectifier circuit is connected with the alternating current electricity, be equipped with in the three-phase bridge type full control rectifier circuit with the limit switch that armature links to each other, just limit switch controls when iron core actuation armature three-phase bridge type full control rectifier circuit switches on.
Preferably, the three-phase bridge type fully-controlled rectifying circuit comprises a resistor and three thyristor groups electrically connected with alternating current, cathode ends of the three thyristor groups are connected together to form a first node, anode ends of the three thyristor groups are connected together to form a second node, the first node is electrically connected with one end of the second coil, the second node is electrically connected with the other end of the second coil through the resistor, and the limit switch is connected between the second node and the resistor in series.
Preferably, each thyristor group comprises a first thyristor and a second thyristor connected in series, and the conduction angle of the first thyristor and the second thyristor is 0 °.
Preferably, the device further comprises a main switch, wherein one end of the first coil is electrically connected with the alternating current through the main switch, and the other end of the first coil is directly electrically connected with the alternating current.
Preferably, one end of the second coil is electrically connected to the resistor through the main switch, and the other end is directly electrically connected to the first node.
Preferably, the armature is provided with a main contact and an auxiliary contact, and the auxiliary contact comprises a normally open contact and a normally closed contact.
Preferably, the magnetic circuit breaker further comprises an elastic piece for driving the armature to reset, and the elastic piece is connected with the armature.
Preferably, the elastic member is a spring.
The utility model has the advantages that:
(1) through setting up the second coil, full controlled rectifier circuit of three-phase bridge type and limit switch to when iron core actuation armature drive limit switch closed, and then control the conduction of full controlled rectifier circuit of three-phase bridge type, the full controlled rectifier circuit of three-phase bridge type further lets in the second coil after converting the alternating current into the direct current, and the direct current that the second coil let in can make the iron core magnetized always, produces stable magnetic force, reduces the vibrations of armature and the production of noise.
(2) Through setting up main switch to make first coil outage time control second coil also outage, ensure that armature can not be in the actuation state always, improve the security.
Drawings
Fig. 1 is a schematic illustration of the principle of the present invention.
Reference numerals: 10. the magnetic control circuit comprises an iron core, 11, a first coil, 12, a second coil, 20, an armature, 21, a main contact, 22, a normally open contact, 23, a normally closed contact, 30, a three-phase bridge type fully-controlled rectifying circuit, 31, a limit switch, 32, a resistor, 33, a thyristor group, 331, a first thyristor, 332, a second thyristor, 40, alternating current, 50, a main switch, 60 and an elastic piece.
Detailed Description
The technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention.
As shown in fig. 1, the contactor for improving the magnetic flux zero crossing phenomenon disclosed in the present invention comprises an iron core 10, an armature 20 and a three-phase bridge type full-controlled rectifier circuit 30, wherein the iron core 10 is wound with a first coil 11 and a second coil 12, the first coil 11 is directly electrically connected to an alternating current 40, and in the implementation, after the alternating current 40 is introduced into the first coil 11, the iron core 10 is magnetized, and then the armature 20 can be attracted; the second coil 12 is electrically connected with the alternating current 40 through the three-phase bridge type full-control rectifying circuit 30, during implementation, the three-phase bridge type full-control rectifying circuit 30 converts the alternating current 40 into direct current to be conducted into the second coil 12, and after the direct current is conducted into the second coil 12, the iron core 10 can be magnetized all the time, so that the armature 20 can be attracted continuously, and vibration and noise of the armature 20 are reduced.
Further, a limit switch 31 is arranged in the three-phase bridge type fully-controlled rectifying circuit 30 and used for controlling whether the three-phase bridge type fully-controlled rectifying circuit 30 is switched on or off, the limit switch 31 is also connected with the armature 20, and the armature 20 can control the on or off of the limit switch 31 so as to control whether the three-phase bridge type fully-controlled rectifying circuit 30 is switched on or off. In practice, when the armature 20 controls the limit switch 31 to be closed, the three-phase bridge fully-controlled rectifying circuit 30 is conducted, and the alternating current 40 can be converted into direct current through the three-phase bridge fully-controlled rectifying circuit 30 and input into the second coil 12.
As shown in fig. 1, the three-phase bridge type fully-controlled rectifying circuit 30 includes a resistor 32 and three thyristor groups 33, the three thyristor groups 33 are electrically connected to three output terminals of an alternating current 40, respectively, and three cathode terminals of the three thyristor groups 33 are connected together and form a first node, three anode terminals are connected together and form a second node, the first node is directly electrically connected to one end of the second coil 12, the second node is electrically connected to another node of the second coil 12 through the resistor 32, and the limit switch 31 is connected in series between the second node and the resistor 32.
Further, each thyristor group 33 includes a first thyristor 331 and a second thyristor 332 connected in series, a junction of the first thyristor 331 and the second thyristor 332 forms a third node, and the third node is electrically connected to an output terminal of the alternating current 40. In this embodiment, the conduction angles of the first thyristor 331 and the second thyristor 332 are both 0 °, which can ensure that the second coil 12 is always connected with direct current.
As shown in fig. 1, the contactor further includes a main switch 50, one end of the first coil 11 is electrically connected to one output terminal of the alternating current 40 through the main switch 50, and the opposite end is directly electrically connected to the other output terminal of the alternating current 40, the main switch 50 can control whether the alternating current 40 is supplied to the first coil 11, and when the main switch 50 is closed, the alternating current 40 is supplied to the first coil 11, so that the iron core 10 is magnetized, and the armature 20 is attracted.
Further, one end of the second coil 12 is electrically connected to the resistor 32 through the main switch 50, and the other end is directly electrically connected to the first node, and the main switch 50 can control whether the second coil 12 is connected with dc power.
As shown in fig. 1, the armature 20 is provided with a main contact 21 and an auxiliary contact, which includes a normally open contact 22 and a normally closed contact 23. When the iron core 10 is magnetized to attract the armature 20, the armature 20 drives the main contact 21, the auxiliary contact and the limit switch 31 to act, so as to realize related functions of the contactor, such as controlling the starting of the motor and controlling the connection or disconnection of the three-phase bridge type trimming circuit.
Further, the contactor further includes an elastic member 60, and the elastic member 60 is connected to the armature 20 for driving the armature 20 to return. When the iron core 10 does not attract the armature 20, the elastic member 60 applies a pulling force to the armature 20 to return the armature 20 to an initial position. In this embodiment, the elastic member 60 is preferably a spring.
The working principle of the contactor is as follows:
after the main switch 50 is closed, the alternating current 40 is supplied to the first coil 11, and at this time, because the limit switch 31 is in an open state in the three-phase bridge type fully-controlled rectifying circuit 30, the direct current is not supplied to the second coil 12. After the alternating current 40 is introduced into the first coil 11, the iron core 10 is magnetized to further attract the armature 20, the main contact 21, the auxiliary contact and the limit switch 31 are driven to act in the action process of the armature 20, at the moment, the motor is started, the three-phase bridge type fully-controlled rectifying circuit 30 is conducted, and then the alternating current 40 can be converted into direct current to be introduced into the second coil 12, so that the iron core 10 generates stable attraction, and stable attraction of the armature 20 is ensured. After the main switch 50 is turned off, the first coil 11 and the second coil 12 lose power at the same time, so that the armature 20 is not always attracted.
Compared with the prior art, contactor, through setting up second coil 12, three-phase bridge type full control rectifier circuit 30 and limit switch 31 to limit switch 31 controls three-phase bridge type full control rectifier circuit 30 and switches on when iron core 10 actuation armature 20, lets in second coil 12 after converting alternating current 40 into the direct current, the direct current that second coil 12 let in can make iron core 10 magnetized always, produces stable magnetic force, reduces the vibrations of armature 20 and the production of noise.
The technical contents and features of the present invention have been disclosed as above, however, those skilled in the art can still make various substitutions and modifications based on the teaching and disclosure of the present invention without departing from the spirit of the present invention, therefore, the protection scope of the present invention should not be limited to the contents disclosed in the embodiments, but should include various substitutions and modifications without departing from the present invention, and should be covered by the claims of the present patent application.
Claims (8)
1. The utility model provides an improve contactor of magnetic flux zero passage phenomenon, its characterized in that includes iron core, armature and three-phase bridge type full control rectifier circuit, the winding has first coil and second coil on the iron core, first coil is connected with the alternating current electricity, the second coil passes through three-phase bridge type full control rectifier circuit is connected with the alternating current electricity, be equipped with in the three-phase bridge type full control rectifier circuit with the limit switch that armature links to each other, just limit switch controls when iron core actuation armature the three-phase bridge type full control rectifier circuit switches on.
2. The contactor according to claim 1, wherein the three-phase bridge type fully controlled rectifying circuit comprises a resistor and three thyristor groups electrically connected with alternating current, cathode terminals of the three thyristor groups are connected together to form a first node, anode terminals of the three thyristor groups are connected together to form a second node, the first node is electrically connected with one end of the second coil, the second node is electrically connected with the other end of the second coil through the resistor, and the limit switch is connected in series between the second node and the resistor.
3. The contactor for improving the zero-crossing phenomenon of magnetic flux according to claim 2, wherein each thyristor group comprises a first thyristor and a second thyristor connected in series, and the conduction angle of the first thyristor and the second thyristor is 0 °.
4. The contactor for improving the zero crossing of magnetic flux as claimed in claim 2, further comprising a main switch, wherein one end of the first coil is electrically connected to the ac power through the main switch, and the other end is directly electrically connected to the ac power.
5. The contactor for improving the zero crossing of magnetic flux as claimed in claim 4, wherein one end of the second coil is electrically connected to the resistor through the main switch, and the other end is directly electrically connected to the first node.
6. The contactor according to claim 1, wherein the armature has a main contact and an auxiliary contact, and the auxiliary contact comprises a normally open contact and a normally closed contact.
7. The contactor for improving the zero crossing of magnetic flux as claimed in claim 1, further comprising an elastic member for driving the armature to return, wherein the elastic member is connected to the armature.
8. The contactor as claimed in claim 7, wherein the elastic member is a spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921627083.1U CN210467711U (en) | 2019-09-27 | 2019-09-27 | Contactor for improving magnetic flux zero-crossing phenomenon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921627083.1U CN210467711U (en) | 2019-09-27 | 2019-09-27 | Contactor for improving magnetic flux zero-crossing phenomenon |
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| Publication Number | Publication Date |
|---|---|
| CN210467711U true CN210467711U (en) | 2020-05-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921627083.1U Active CN210467711U (en) | 2019-09-27 | 2019-09-27 | Contactor for improving magnetic flux zero-crossing phenomenon |
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| Country | Link |
|---|---|
| CN (1) | CN210467711U (en) |
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2019
- 2019-09-27 CN CN201921627083.1U patent/CN210467711U/en active Active
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