CN202977308U - Control circuit of vacuum contactor - Google Patents
Control circuit of vacuum contactor Download PDFInfo
- Publication number
- CN202977308U CN202977308U CN 201220707535 CN201220707535U CN202977308U CN 202977308 U CN202977308 U CN 202977308U CN 201220707535 CN201220707535 CN 201220707535 CN 201220707535 U CN201220707535 U CN 201220707535U CN 202977308 U CN202977308 U CN 202977308U
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- CN
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- Prior art keywords
- vacuum contactor
- control circuit
- rectifier bridge
- parallel
- capacitor
- Prior art date
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Abstract
The utility model relates to a circuit in a vacuum contactor, and particularly relates to a control circuit of the vacuum contactor. The control circuit of the vacuum contactor comprises a small-power transformer I, wherein the output end of a secondary oil of the transformer T is connected with a diode rectifier bridge; a maintaining coil L2 and a fly-wheel diode D of the vacuum contactor connected in parallel are connected between the output ends of the diode rectifier bridge; a capacitor C2 is also connected in parallel between the maintaining coil L2 of the vacuum contactor and the output end of the diode rectifier bridge; and a normally open contact of a second intermediate relay K2 is also connected between connection points of the second capacitor C2 and the maintaining coil L2 of the vacuum contact. The control circuit of the vacuum contactor is simple and practical in structure; the closed current of the vacuum contactor is provided by the capacitor; and a low-power transformer supplies electricity. Therefore, the problem that an actuation coil is easily burnt out frequently after the existing vacuum contactor is closed is solved; and the cost is also reduced.
Description
Technical field
The utility model relates to the circuit of vacuum contactor, is specially a kind of control circuit of vacuum contactor.
Background technology
as shown in Figure 1, the control circuit of existing vacuum contactor comprises transformer T, the secondary coil output of transformer T is connected with diode rectifier bridge, also be connected with respectively the normally opened contact of the second auxiliary relay K2 in two-way wiring between the input of secondary coil output and rectifier bridge, be connected with keeping coil L2 and the sustained diode of vacuum contactor in parallel between the output of diode rectifier bridge, the be together in series two ends of the keeping coil L2 that is connected in parallel on vacuum contactor of the pull-in winding L1 of the normally-closed contact of the first auxiliary relay K1 and vacuum contactor, the normally-closed contact two ends of the first auxiliary relay K1 also are parallel with the first capacitor C 1.the coil of the second auxiliary relay K2 in the vacuum contactor start-up circuit gets electric, the normally opened contact of the second auxiliary relay K2 in the vacuum contactor control circuit is closed, the alternating current of the secondary coil output output of transformer T becomes direct current through after diode rectifier bridge, direct current is carried in the two ends of pull-in winding L1 and the keeping coil L2 of vacuum contactor, electromagnetic actuation in vacuum contactor, and then vacuum contactor is closed, the coil of the first auxiliary relay K1 in the start-up circuit of vacuum contactor gets electric, in control circuit, the normally-closed contact of the first auxiliary relay K1 disconnects, make the pull-in winding L1 outage of vacuum contactor, vacuum contactor remains on attracting state by keeping coil L2.Vacuum contactor in use, the pull-in winding L1 of vacuum contactor needs heavy current could control electromagnetic actuation, thereby vacuum contactor needs high-power transformer to provide heavy current for it, the normally-closed contact of the first auxiliary relay K1 often is subject to the impact of long-time heavy current, make the heating of contact adhesion, after electromagnetic actuation, the normally-closed contact of the first auxiliary relay K1 does not disconnect, flow through for a long time heavy current in the pull-in winding L1 of vacuum contactor, be easy to burn pull-in winding L1.
Summary of the invention
The utility model provides the control circuit with a kind of vacuum contactor for the problem that pull-in winding in the control circuit that solves existing vacuum contactor easily burns.
the utility model is to adopt following technical scheme to realize: a kind of control circuit of vacuum contactor, comprise diode rectifier bridge, be connected with keeping coil L2 and sustained diode in parallel between the output of diode rectifier bridge, the be together in series two ends of the keeping coil L2 that is connected in parallel on vacuum contactor of the pull-in winding L1 of the normally-closed contact of the first auxiliary relay K1 and vacuum contactor, the normally-closed contact two ends of the first auxiliary relay K1 also are parallel with the first capacitor C 1, also be parallel with the second capacitor C 2 between the keeping coil L2 of vacuum contactor and the output of diode rectifier bridge, the normally opened contact that is also connecting the second auxiliary relay K2 between the tie point of the keeping coil L2 of the second capacitor C 2 and vacuum contactor.
Transformer T in the vacuum contactor control circuit selects low power transformer, if the normally opened contact of the second auxiliary relay K2 is closed, be full of in advance the second capacitor C 2 discharges of electricity by transformer T, heavy current is provided for the pull-in winding L1 of vacuum contactor, electromagnetic actuation in vacuum contactor, the normally-closed contact of the first auxiliary relay K1 disconnects.The second capacitor C 2 can provide heavy current moment, satisfies the requirement of the electromagnetic actuation in vacuum contactor, if do not disconnect at the normally-closed contact K1 of magnet attraction final vacuum contactor, electrochemical capacitor C2 does not provide lasting heavy current, and coil L1 can not burn.
The utility model has increased electric capacity on the basis of original control circuit, make this control circuit can select low power transformer, has solved the problem that normal its closed rear pull-in winding that occurs of existing vacuum contactor easily burns, and has also reduced simultaneously cost.
Description of drawings
Fig. 1 is the control circuit figure of existing vacuum contactor.
Fig. 2 is circuit structure diagram of the present utility model.
Embodiment
a kind of control circuit of vacuum contactor, comprise diode rectifier bridge, be connected with keeping coil L2 and the sustained diode of vacuum contactor in parallel between the output of diode rectifier bridge, the be together in series two ends of the keeping coil L2 that is connected in parallel on vacuum contactor of the pull-in winding L1 of the normally-closed contact of the first auxiliary relay K1 and vacuum contactor, the normally-closed contact two ends of the first auxiliary relay K1 also are parallel with the first capacitor C 1, also be parallel with the second capacitor C 2 between the keeping coil L2 of vacuum contactor and the output of diode rectifier bridge, the normally opened contact that is also connecting the second auxiliary relay K2 between the tie point of the keeping coil L2 of the second capacitor C 2 and vacuum contactor.During concrete enforcement, be parallel with electrochemical capacitor C2 between the output of diode rectifier bridge and sustained diode, also be connected with the normally opened contact of auxiliary relay K2 between the tie point of electrochemical capacitor C2 and fly-wheel diode, the power of transformer T can be the sixth of original transformer efficiency.
Claims (1)
1. the control circuit of a vacuum contactor, comprise diode rectifier bridge, be connected with keeping coil (L2) and the fly-wheel diode (D) of vacuum contactor in parallel between the output of diode rectifier bridge, the be together in series two ends of the keeping coil (L2) that is connected in parallel on vacuum contactor of the pull-in winding (L1) of the normally-closed contact of the first auxiliary relay (K1) and vacuum contactor, the normally-closed contact two ends of the first auxiliary relay (K1) also are parallel with the first electric capacity (C1), it is characterized in that also being parallel with the second electric capacity (C2) between the output of the keeping coil (L2) of vacuum contactor and diode rectifier bridge, the normally opened contact that is also connecting the second auxiliary relay (K2) between the tie point of the keeping coil (L2) of the second electric capacity (C2) and vacuum contactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220707535 CN202977308U (en) | 2012-12-20 | 2012-12-20 | Control circuit of vacuum contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220707535 CN202977308U (en) | 2012-12-20 | 2012-12-20 | Control circuit of vacuum contactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202977308U true CN202977308U (en) | 2013-06-05 |
Family
ID=48518352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220707535 Expired - Fee Related CN202977308U (en) | 2012-12-20 | 2012-12-20 | Control circuit of vacuum contactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202977308U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113012983A (en) * | 2019-12-20 | 2021-06-22 | 施耐德电气工业公司 | Control device and method for contactor |
-
2012
- 2012-12-20 CN CN 201220707535 patent/CN202977308U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113012983A (en) * | 2019-12-20 | 2021-06-22 | 施耐德电气工业公司 | Control device and method for contactor |
| WO2021121400A1 (en) * | 2019-12-20 | 2021-06-24 | 施耐德电气工业公司 | Control device and method for contactor |
| CN113012983B (en) * | 2019-12-20 | 2022-06-03 | 施耐德电气工业公司 | Control device and method for contactor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Ren Jufeng Inventor after: Wang Lidong Inventor after: Liu Yilin Inventor after: Li Jianguo Inventor after: Liu Datong Inventor after: Wang Junwu Inventor after: Liu Shuanzhu Inventor after: Tang Bo Inventor after: Jia Yongsheng Inventor after: Gao Zhanjun Inventor after: Xu Wenfei Inventor before: Ren Jufeng Inventor before: Wang Lidong Inventor before: Liu Yilin Inventor before: Li Jianguo Inventor before: Liu Datong Inventor before: Wang Junwu Inventor before: Liu Shuanzhu Inventor before: Tang Bo Inventor before: Jia Yongsheng Inventor before: Gao Zhanjun Inventor before: Xu Wenfei |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130605 Termination date: 20131220 |