CN202855640U - Drive circuit of magnetic latching relay - Google Patents
Drive circuit of magnetic latching relay Download PDFInfo
- Publication number
- CN202855640U CN202855640U CN 201220461527 CN201220461527U CN202855640U CN 202855640 U CN202855640 U CN 202855640U CN 201220461527 CN201220461527 CN 201220461527 CN 201220461527 U CN201220461527 U CN 201220461527U CN 202855640 U CN202855640 U CN 202855640U
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- circuit
- driver
- relay
- drive circuit
- drive
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Abstract
The utility model discloses a drive circuit of a magnetic latching relay, which comprises a driver, a sampling circuit, a control display circuit and a power supply circuit used for supplying power to all the above circuits. The output end of the driver is respectively connected with the input ends of both the relay and the control display circuit. The sampling end of the sampling circuit samples the working state information of the relay. The signal output end of the sampling circuit is connected with the input end of the driver. According to the technical scheme of the utility model, the drive circuit is highly integrated and is externally connected with a plurality of discrete elements to enable the H-bridge drive of the relay. Meanwhile, the short-circuit and overload protection of a DRV8800 main drive circuit is realized. The interior drive parts of the circuit are interlocked, so that the break-though condition is avoided. The low-voltage protection and the over-temperature protection for the interior of the drive circuit are also enabled.
Description
Technical field
The utility model relates to a kind of drive circuit of magnetic latching relay.
Background technology
Magnetic latching relay is a kind of new type of relay that grew up in recent years, also is a kind of automatic switch.The same with other electromagnetic relays, circuit is played automatic connection and cutting action.Difference is, the normally closed or normally open of magnetic latching relay is the effect that relies on permanent-magnet steel fully, and the conversion of its on off state triggers by the pulse electrical signal of certain width and finishes.Be mainly used at present pre-paying kilowatt-hour meter, in the combination switch.The drive circuit of magnetic latching relay all is the H bridge type drive circuit with the discrete component overlap joint at present, as shown in Figure 1:
There is following problem in this circuit:
1, discrete component is many, and the inconsistent job insecurity of component parameter brings very large inconvenience for production and debugging.
2, straight-through protection, if driving signal A and B are 1 o'clock simultaneously, the situation of Q1 and Q4 or Q2 and the direct conducting of Q3 meeting outlet drives triode and can burn.
The utility model content
The utility model purpose is the drive circuit that a kind of magnetic latching relay is provided for the defective that prior art exists.
The utility model adopts following technical scheme for achieving the above object:
The drive circuit of the utility model magnetic latching relay, comprise driver, sample circuit, control display circuit and to the power circuit of above-mentioned each circuit supply, wherein the output of driver is succeeded respectively the input of electrical equipment and control display circuit, the work state information of the sampling end sampling relay of sample circuit, the input that the signal output part of sample circuit is driver connected.
It is the driving chip of DRV8800 that described driver adopts model.
The utlity model has following beneficial effect:
1, highly integrated, the H bridge that external several discrete components can be finished relay drives.
2, DRV8800 drives major loop short circuit and overload protection.
3, internal drive interlocks, and the situation of bridge arm direct pass can not occur.Inner under-voltage protection and overheat protector.
Description of drawings
Fig. 1: the circuit theory diagrams of existing drive circuit.
Fig. 2: the utility model circuit theory diagrams.
Embodiment
As shown in Figure 2, the drive circuit of the utility model magnetic latching relay, comprise driver, sample circuit, control display circuit and to the power circuit of above-mentioned each circuit supply, wherein the output of driver is succeeded respectively the input of electrical equipment and control display circuit, the work state information of the sampling end sampling relay of sample circuit, the input that the signal output part of sample circuit is driver connected.
It is the driving chip of DRV8800 that described driver adopts model.
Claims (2)
1. the drive circuit of a magnetic latching relay, it is characterized in that comprising driver, sample circuit, control display circuit and to the power circuit of above-mentioned each circuit supply, wherein the output of driver is succeeded respectively the input of electrical equipment and control display circuit, the work state information of the sampling end sampling relay of sample circuit, the input that the signal output part of sample circuit is driver connected.
2. the drive circuit of magnetic latching relay according to claim 1 is characterized in that it is the driving chip of DRV8800 that described driver adopts model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220461527 CN202855640U (en) | 2012-09-11 | 2012-09-11 | Drive circuit of magnetic latching relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220461527 CN202855640U (en) | 2012-09-11 | 2012-09-11 | Drive circuit of magnetic latching relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202855640U true CN202855640U (en) | 2013-04-03 |
Family
ID=47986809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220461527 Expired - Fee Related CN202855640U (en) | 2012-09-11 | 2012-09-11 | Drive circuit of magnetic latching relay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202855640U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105321258A (en) * | 2015-11-04 | 2016-02-10 | 深圳怡化电脑股份有限公司 | Commutator driving circuit and commutator driving method |
| CN106486978A (en) * | 2016-12-22 | 2017-03-08 | 北京海林节能科技股份有限公司 | Power-down protection apparatus based on magnetic latching relay |
| CN110410552A (en) * | 2019-07-09 | 2019-11-05 | 广东美的制冷设备有限公司 | Four-way valve-driving circuit and air conditioner |
-
2012
- 2012-09-11 CN CN 201220461527 patent/CN202855640U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105321258A (en) * | 2015-11-04 | 2016-02-10 | 深圳怡化电脑股份有限公司 | Commutator driving circuit and commutator driving method |
| CN106486978A (en) * | 2016-12-22 | 2017-03-08 | 北京海林节能科技股份有限公司 | Power-down protection apparatus based on magnetic latching relay |
| CN106486978B (en) * | 2016-12-22 | 2019-03-19 | 北京海林节能科技股份有限公司 | Power-down protection apparatus based on magnetic latching relay |
| CN110410552A (en) * | 2019-07-09 | 2019-11-05 | 广东美的制冷设备有限公司 | Four-way valve-driving circuit and air conditioner |
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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: 20130403 Termination date: 20140911 |
|
| EXPY | Termination of patent right or utility model |