CN201466692U - Low voltage protection circuit for AC contactor - Google Patents
Low voltage protection circuit for AC contactor Download PDFInfo
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- CN201466692U CN201466692U CN2009200780987U CN200920078098U CN201466692U CN 201466692 U CN201466692 U CN 201466692U CN 2009200780987 U CN2009200780987 U CN 2009200780987U CN 200920078098 U CN200920078098 U CN 200920078098U CN 201466692 U CN201466692 U CN 201466692U
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- low voltage
- contactor
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- 238000012423 maintenance Methods 0.000 abstract 2
- 239000000853 adhesive Substances 0.000 description 11
- 230000001070 adhesive effect Effects 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009885 systemic effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The utility model relates to a low voltage protection circuit for an AC contactor, which comprises a low voltage startup control circuit and a low voltage maintenance control circuit which are connected in parallel. The low voltage startup control circuit comprises a first drive circuit, a first relay connected with the first drive circuit, a first rectifying circuit, a first switch group connected with two ends of the first rectifying circuit, and a solenoid controller connected with the first rectifying circuit through the first switch group. The low voltage maintenance control circuit comprises a second drive circuit, a second relay connected with the second drive circuit, a second rectifying circuit, a second switch group connected with two ends of the second rectifying circuit and a solenoid controller connected with the second rectifying circuit through the second switch group, wherein the other two ends of the second rectifying circuit are respectively connected with a transformer. The low voltage protection circuit can be actuated when the alternating current is low in voltage and the solenoid can be maintained through low power consumption. When the alternating current is high in voltage, the low voltage protection circuit can work for a long time without affecting the service life of the coil.
Description
Technical field
The utility model relates to a kind of coil working that can make A.C. contactor than the circuit in the wide-voltage range, refers in particular to a kind of A.C. contactor low-voltage protection circuit.
Background technology
At present, in a lot of national particularly countries and regions of remote backwardness, the voltage of electrical network is unstable especially, and the scope of application of general A.C. contactor voltage is basically at 220+-20%, and alternating current is just reduced to about 170V normally adhesive even burnt the line bag.Can't long-time outside this scope, operation reliably., therefore, unsettled voltage will cause the system failure probably, cause bigger systemic breakdown takes place, and cause damage.Solution to this problem is to use the DC control contactor at present.But the DC control contactor never is used widely owing to there is long-pending big, the cost problem of higher of line inclusion again.So the interior problem of voltage range that can make A.C. contactor be operated in broad is exactly the problem that present urgent need will solve.
Given this, be necessary to provide the A.C. contactor low-voltage protection circuit to solve the problems of the technologies described above in fact.
The utility model content
The technical problems to be solved in the utility model provides a kind of A.C. contactor low-voltage protection circuit and common A.C. contactor can be adapted under the operating voltage of broad work.
For solving the problems of the technologies described above, the utility model adopts following technical scheme: a kind of A.C. contactor low-voltage protection circuit, this circuit comprises low voltage starting control circuit and low voltage sustain control circuit in parallel, and described low voltage starting control circuit comprises: first drive circuit, first relay that is connected with described first drive circuit, first rectification circuit (BD1), first switches set that is connected with the first rectification circuit two ends and the line packet controller that is communicated with first rectification circuit by first switches set; Described low voltage sustain control circuit comprises: second drive circuit, second relay that is connected with described second drive circuit, second rectification circuit (BD2), the second switch group that is connected with the second rectification circuit two ends and the line packet controller that is communicated with second rectification circuit by the second switch group; Described second rectification circuit (BD2) links to each other with transformer (T1) respectively at two ends in addition.
Preferably, described first drive circuit comprises the first transistor, and its control end connects a resistance, and its input is connected by another resistance with the coil of first relay.
Preferably, described second drive circuit comprises transistor seconds, and its control end connects a resistance, and its input is connected by another resistance with the coil of second relay.
The utility model contactor can adhesive when AC low-tension (150V-170V), and the line bag only needs lower power consumption to keep; Contactor can work long hours when ac high-voltage (264V-290V), and the life-span of coil is unaffected.
Description of drawings
Fig. 1 is the utility model system block diagram;
Fig. 2 is the utility model circuit theory diagrams.
Embodiment
Please refer to shown in Figure 2ly, the A.C. contactor protective circuit comprises that low-voltage protection circuit closes high tension protection circuit, and described high tension protection circuit comprises that rated voltage and high voltage startup part, high pressure keep part.
The present invention is specifically related to a kind of A.C. contactor low-voltage protection circuit, this circuit comprises low voltage starting control circuit and low voltage sustain control circuit in parallel, and described low voltage starting control circuit comprises first drive circuit, the first relay R LY1 that is connected with described first drive circuit, the first rectification circuit BD1, first switches set that is connected with the first rectification circuit two ends and the line packet controller that is communicated with first rectification circuit by first switches set; Described low voltage sustain control circuit comprises second drive circuit, the second relay R LY3 that is connected with described second drive circuit, the second rectification circuit BD2, the second switch group that is connected with the second rectification circuit two ends and the line packet controller that is communicated with second rectification circuit by the second switch group; The other two ends of the described second rectification circuit BD2 link to each other with transformer T1 respectively.
Described first drive circuit comprises the first transistor Q1, and its control end connects a resistance R 2, and its input is connected by another resistance R 1 with the coil D1 of first relay.
Described second drive circuit comprises transistor seconds Q3, and its control end connects a resistance R 8, and its input is connected by another resistance R 9 with the coil D4 of second relay.
All relay line bags all must not be electric under the initial condition, RLY1, and RLY2 (not shown), RLY3 is for often opening, and RLY4 (not shown) is normally closed.
● voltage is in the spare time of 150-170V (variable range), when preparing the adhesive contactor.
The same time of a.RLY1 and RLY3 get electric after, a few tens of milliseconds after 100MS,
B. disconnect RLY1.And RLY3 continue electric work.At this moment, contactor operate as normal.
In case c. contactor adhesive.No matter how alternating voltage changes (150-290V), all relays are all maintained the statusquo.Disconnect all relay electric-loss until contactor.
● voltage is between 170-290V (variable range), when preparing the adhesive contactor.
A. rated voltage and high voltage startup are partly worked.
B. when voltage was higher than 250V, high pressure was kept part and is started working, and can reduce the electric current that flows through the line bag, thereby reduced the loss of line bag.When being lower than 250V-5V, high pressure is kept part and is quit work.While contactor operate as normal.
When the utility model uses, comprise the startup of line bag and keep two parts
A, actuating section comprise low voltage starting (150-170V), normal (170V-290V) two parts that start, when line voltage is in the low voltage starting scope, with reference to figure 1, RLY1 and RLY3 adhesive simultaneously, can reach the 212V-240V direct voltage after line voltage process BD1, the BD2 rectification, can drive the line bag of relay this moment.When line voltage is in normal startup scope, RLY2 and RLY4 adhesive, line voltage directly is used for driving relay line bag.
B, keep part and comprise line voltage lower (150-170V), line voltage (170-264V), three kinds of situations of line voltage higher (264-290V) in rated range, when line voltage is low, drive relay line bag through RLY1, RLY2 after line voltage process BD1, the BD2 rectification, a few tens of milliseconds to one hundred milliseconds of RLY1 disconnect after the relay adhesive, i.e. the attracting state of the relay line bag that can keep with very little voltage after by T1 transformation, BD2 rectification of line voltage.Thereby reach the purpose of the loss that reduces relay line bag.Rated voltage and high voltage startup partial circuit work when line voltage is in the 170-290V scope, when voltage was higher than 250V, high pressure was kept partial circuit and is started working, thereby had reached the purpose of protection relay line bag when line voltage is higher.Therefore reduced owing to the unstable low risk of line bag life-span that causes relay of line voltage.
Contactor can adhesive when AC low-tension (150V-170V) among the present invention, and the line bag only needs lower power consumption to keep. and contactor can work long hours when ac high-voltage (264V-290V), and the life-span of coil is unaffected.
Operating voltage can be in 150V-290V reliably working, pick-up voltage can be from the reliable adhesive of 150V-1290V.This controller also is applicable to the operating voltage that voltage is higher, and this controller is applicable to various abominable power grid environments, is exactly that extremely unsettled voltage influences its person of outstanding talent's nothing, and it can adapt to high pressure can adapt to low pressure again, and has automatic protection functions.When voltage falls to about 150V, it can be cut off the electricity supply automatically, can not constitute any damage harm to module and line bag.When voltage rises to about 170V again, it can be opened and reliable adhesive automatically.
Above-mentioned description to embodiment is for ease of this skill.The utility model can be understood and use to the those of ordinary skill in art field.The person skilled in the art obviously can easily make various modifications to these embodiment, and needn't pass through performing creative labour being applied in the General Principle of this explanation among other embodiment.Therefore, the utility model is not limited to the embodiment here, and those skilled in the art should be within protection range of the present utility model for improvement and modification that the utility model is made according to announcement of the present utility model.
Claims (3)
1. A.C. contactor low-voltage protection circuit, it is characterized in that: this circuit comprises low voltage starting control circuit and low voltage sustain control circuit in parallel, and described low voltage starting control circuit comprises first drive circuit, first relay that is connected with described first drive circuit, first rectification circuit (BD1), first switches set that is connected with the first rectification circuit two ends and the line packet controller that is communicated with first rectification circuit by first switches set; Described low voltage sustain control circuit comprises second drive circuit, second relay that is connected with described second drive circuit, second rectification circuit (BD2), the second switch group that is connected with the second rectification circuit two ends and the line packet controller that is communicated with second rectification circuit by the second switch group; Described second rectification circuit (BD2) links to each other with transformer (T1) respectively at two ends in addition.
2. a kind of A.C. contactor low-voltage protection circuit as claimed in claim 1 is characterized in that: described first drive circuit comprises the first transistor, and its control end connects a resistance, and its input is connected by another resistance with the coil of first relay.
3. a kind of A.C. contactor low-voltage protection circuit as claimed in claim 1 is characterized in that: described second drive circuit comprises transistor seconds, and its control end connects a resistance, and its input is connected by another resistance with the coil of second relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200780987U CN201466692U (en) | 2009-07-10 | 2009-07-10 | Low voltage protection circuit for AC contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200780987U CN201466692U (en) | 2009-07-10 | 2009-07-10 | Low voltage protection circuit for AC contactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201466692U true CN201466692U (en) | 2010-05-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200780987U Expired - Fee Related CN201466692U (en) | 2009-07-10 | 2009-07-10 | Low voltage protection circuit for AC contactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201466692U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103219799A (en) * | 2013-03-29 | 2013-07-24 | 李华 | Intelligent control device for power transformer |
| TWI644573B (en) * | 2013-08-13 | 2018-12-11 | 日商新力股份有限公司 | Headphone type audio device |
-
2009
- 2009-07-10 CN CN2009200780987U patent/CN201466692U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103219799A (en) * | 2013-03-29 | 2013-07-24 | 李华 | Intelligent control device for power transformer |
| CN103219799B (en) * | 2013-03-29 | 2015-10-14 | 李华 | Intelligent control device for power transformer |
| TWI644573B (en) * | 2013-08-13 | 2018-12-11 | 日商新力股份有限公司 | Headphone type audio device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100512 Termination date: 20140710 |
|
| EXPY | Termination of patent right or utility model |