CN114420505B - Circuit for solving small current failure of magnetic latching relay - Google Patents
Circuit for solving small current failure of magnetic latching relay Download PDFInfo
- Publication number
- CN114420505B CN114420505B CN202210087194.8A CN202210087194A CN114420505B CN 114420505 B CN114420505 B CN 114420505B CN 202210087194 A CN202210087194 A CN 202210087194A CN 114420505 B CN114420505 B CN 114420505B
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- Prior art keywords
- latching relay
- magnetic latching
- resistor
- mos tube
- circuit
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/02—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
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- Relay Circuits (AREA)
Abstract
The invention discloses a circuit for solving the problem of small current failure of a magnetic latching relay, and belongs to the field of power supply control. The circuit for solving the problem of small current failure of the magnetic latching relay comprises an MOS tube, wherein whether the MOS tube is conducted or not is used for controlling the output of a power supply or not; the MOS tube is connected with a driving circuit, the on-off of the driving circuit is controlled by the magnetic latching relay, and when the magnetic latching relay is closed, the driving circuit of the MOS tube works normally; when the magnetic latching relay switch is disconnected, the driving circuit of the MOS tube is disconnected; the magnetic latching relay is connected with a circuit for increasing contact load current. The invention can effectively solve the problem of small current failure of the magnetic latching relay and widen the application range of the relay.
Description
Technical Field
The invention belongs to the field of power supply control, and relates to a circuit for solving the problem of small current failure of a magnetic latching relay.
Background
In the design of power supply products, a magnetic latching relay is often used for enabling control or function switching, a working condition of low-level small current exists in a switch contact load, when the contact current is low, the arc effect of the contact is obviously weakened, a layer of carbonized film is gradually formed on the surface of the contact, the contact resistance is continuously increased, the contact reliability is affected, and the contact closing function is easy to fail.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a circuit for solving the problem of small current failure of a magnetic latching relay.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
the circuit for solving the problem of small current failure of the magnetic latching relay comprises an MOS tube, wherein whether the MOS tube is conducted or not is used for controlling the output of a power supply or not;
the MOS tube is connected with a driving circuit, the on-off of the driving circuit is controlled by the magnetic latching relay, and when the magnetic latching relay is closed, the driving circuit of the MOS tube works normally; when the magnetic latching relay switch is disconnected, the driving circuit of the MOS tube is disconnected;
the magnetic latching relay is connected with a circuit for increasing contact load current.
Further, the driving circuit is composed of a second resistor, a third resistor and a voltage stabilizing tube.
Further, the circuit for increasing the contact load current is a first resistor and a capacitor connected in series.
Further, the magnetic latching relay is connected in parallel with a first resistor and a capacitor which are connected in series.
Further, when the magnetic latching relay is switched from open to closed, the voltage across the capacitor discharges through the first resistor, thereby increasing the load current for the magnetic latching relay contacts.
Further, the power output positive pole is connected with one end of a second resistor, a voltage stabilizing tube negative pole and a source electrode of the MOS tube, the power output negative pole is connected with one end of a capacitor and one end of a magnetic latching relay, the other end of the second resistor is connected with a grid electrode of the MOS tube, the voltage stabilizing tube positive pole and one end of a third resistor, the other end of the third resistor is connected with one end of a first resistor and the magnetic latching relay, the other end of the first resistor is communicated with the other end of the capacitor, and a drain electrode of the MOS tube serves as an output positive pole of the circuit.
Further, a power conversion module is connected to the power supply.
Compared with the prior art, the invention has the following beneficial effects:
according to the circuit for solving the problem of small current failure of the magnetic latching relay, when the magnetic latching relay is closed, the driving circuit of the MOS tube normally works, the MOS tube is conducted, and the power supply output is normal; when the magnetic latching relay is disconnected, the driving circuit of the MOS tube is disconnected, the MOS tube is cut off, and the power supply does not output. The power supply controls whether the MOS tube is conducted or not through switching of the magnetic latching relay, and then whether the output end can normally output signals or not is controlled; and for the second resistor and the third resistor between the positive and negative output lines, the resistance value is larger to reduce the power consumption, so that the generated load current is smaller when the magnetic latching relay is closed, and poor contact of the magnetic latching relay contacts is easily caused after long-term operation. The first resistor and the capacitor are used for solving the problem of small current failure of the magnetic latching relay, after the first resistor and the capacitor are added, when the magnetic latching relay is switched from the right side to the left side, the voltage at two ends of the capacitor is discharged, so that the load current is increased for the contact of the magnetic latching relay, and the problem of small current failure of the magnetic latching relay is effectively solved. The invention effectively solves the problem of small current failure of the magnetic latching relay and widens the application range of the magnetic latching relay.
Drawings
Fig. 1 is a circuit diagram of an application example of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention is described in further detail below with reference to the attached drawing figures:
referring to fig. 1, fig. 1 is a circuit diagram of an application example of the invention, and a circuit for solving the problem of low current failure of a magnetic latching relay comprises a MOS transistor Q1, a first resistor R1, a second resistor R2, a third resistor R3, a voltage stabilizing tube V1, a magnetic latching relay K1, and a capacitor C1;
the output positive pole of power conversion module is connected with the one end of second resistance R2, the steady voltage pipe V1 negative pole and MOS pipe Q1's source, the output negative pole of power conversion module is connected with the one end and the magnetic latching relay K1 of electric capacity C1, the other end of second resistance R2 is connected with MOS pipe Q1's grid, steady voltage pipe V1 positive pole links to each other and the one end of third resistance R3, the other end of third resistance R3 is connected with the one end and the magnetic latching relay K1 of first resistance R1, the other end of first resistance R1 is linked together with electric capacity C1's the other end, MOS pipe Q1's drain electrode is as the output positive pole of application example circuit.
The on or off of the MOS tube Q1 is used for controlling whether output exists or not;
the second resistor R2, the third resistor R3 and the voltage stabilizing tube V1 form a driving circuit of the MOS tube Q1;
the magnetic latching relay K1, when the K1 switch is on the left side (closed), the driving circuit of the MOS tube Q1 works normally; when the K1 switch is on the right side (disconnected), the driving circuit of the MOS transistor Q1 is disconnected;
and the first resistor R1 and the capacitor C1 add load current to the contacts of the magnetic latching relay K1.
The working principle of the invention is as follows:
when the magnetic latching relay K1 is on the left side, the driving circuit of the MOS tube Q1 works normally, the MOS tube Q1 is conducted, and the power supply output is normal; when the magnetic latching relay K1 is on the right side, the driving circuit of the MOS tube Q1 is disconnected, the MOS tube Q1 is cut off, and the power supply does not output. The power supply controls whether the MOS tube Q1 is conducted or not through switching of the magnetic latching relay K1, and further controls whether the output end can normally output signals or not;
for the second resistor R2 and the third resistor R3 between the positive and negative output lines, the resistance is larger to reduce the power consumption, for example, the power output voltage is 25V, the mos transistor driving voltage is 12V, then R2 can be set to 100kΩ, and R3 is set to 10kΩ; and then the driving voltage is stabilized at 12V through the action of the voltage stabilizing tube, so that the generated load current is smaller when the magnetic latching relay K1 is closed, and poor contact of the magnetic latching relay K1 is easily caused after long-term working. The first resistor R1 and the capacitor C1 are used for solving the problem of K1 small current failure, after the first resistor R1 and the capacitor C1 are added, when the magnetic latching relay K1 is switched from the right side to the left side, the voltage at two ends of the capacitor C1 is discharged through the R1, and the load current is increased for the contact of the magnetic latching relay K1, so that the problem of small current failure of the magnetic latching relay is effectively solved.
The above is only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited by this, and any modification made on the basis of the technical scheme according to the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (2)
1. The circuit for solving the problem of small current failure of the magnetic latching relay is characterized by comprising an MOS tube, wherein whether the MOS tube is conducted or not is used for controlling the output of a power supply or not;
the MOS tube is connected with a driving circuit, the on-off of the driving circuit is controlled by the magnetic latching relay, and when the magnetic latching relay is closed, the driving circuit of the MOS tube works normally; when the magnetic latching relay switch is disconnected, the driving circuit of the MOS tube is disconnected;
the magnetic latching relay is connected with a circuit for increasing contact load current; the driving circuit consists of a second resistor, a third resistor and a voltage stabilizing tube;
the circuit for increasing the contact load current is a first resistor and a capacitor which are connected in series; the magnetic latching relay is connected with a first resistor and a capacitor which are connected in series; when the magnetic latching relay is switched from open to closed, the voltage at two ends of the capacitor is discharged through the first resistor, so that load current is increased for the magnetic latching relay contact;
the power output positive pole is connected with one end of a second resistor, a voltage stabilizing tube negative pole and a source electrode of an MOS tube, the power output negative pole is connected with one end of a capacitor and one end of a magnetic latching relay, the other end of the second resistor is connected with a grid electrode of the MOS tube, the voltage stabilizing tube positive pole and one end of a third resistor, the other end of the third resistor is connected with one end of a first resistor and the magnetic latching relay, the other end of the first resistor is communicated with the other end of the capacitor, and a drain electrode of the MOS tube serves as an output positive pole of the circuit.
2. The circuit for solving the low-current failure of a magnetic latching relay according to claim 1, wherein a power conversion module is connected to the power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210087194.8A CN114420505B (en) | 2022-01-25 | 2022-01-25 | Circuit for solving small current failure of magnetic latching relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210087194.8A CN114420505B (en) | 2022-01-25 | 2022-01-25 | Circuit for solving small current failure of magnetic latching relay |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114420505A CN114420505A (en) | 2022-04-29 |
| CN114420505B true CN114420505B (en) | 2023-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210087194.8A Active CN114420505B (en) | 2022-01-25 | 2022-01-25 | Circuit for solving small current failure of magnetic latching relay |
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| CN (1) | CN114420505B (en) |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0779147A (en) * | 1993-07-12 | 1995-03-20 | Yazaki Corp | Optical si thyristor drive circuit and protection circuit therefor |
| JP2000014192A (en) * | 1998-06-18 | 2000-01-14 | Toyota Motor Corp | Forward/backward revolution control circuit for vehicle-mounted motor |
| JP2004178967A (en) * | 2002-11-27 | 2004-06-24 | Kayaba Ind Co Ltd | Relay control device |
| CN203966976U (en) * | 2014-05-28 | 2014-11-26 | 武汉点线科技有限公司 | A kind of direct current relay drive circuit |
| CN105321770A (en) * | 2014-07-30 | 2016-02-10 | 上海电科电器科技有限公司 | Alternating current contactor controller and control method |
| CN105575729A (en) * | 2014-10-14 | 2016-05-11 | 北京谊安医疗系统股份有限公司 | Drive circuit of magnetic latching relay and control method thereof |
| CN207834198U (en) * | 2018-01-03 | 2018-09-07 | 河南康派智能技术有限公司 | A kind of magnetic latching relay driving device and a kind of magnetic latching relay |
| CN207883611U (en) * | 2017-12-28 | 2018-09-18 | 东风商用车有限公司 | A kind of onboard relay high current control system of controller |
| CN108923424A (en) * | 2018-08-12 | 2018-11-30 | 东莞市迅迪电子有限公司 | A kind of single-fire-wire electronic switch circuit |
| CN209880490U (en) * | 2019-07-09 | 2019-12-31 | 四川三秦电气有限责任公司 | Electromagnetic relay control circuit based on zero-crossing detection |
| CN111342666A (en) * | 2020-02-27 | 2020-06-26 | 西安微电子技术研究所 | Pulse trigger solid relay circuit for satellite |
| CN212032950U (en) * | 2020-02-27 | 2020-11-27 | 苏州斯普瑞英电子科技有限公司 | Magnetic latching relay drive circuit |
| CN112599384A (en) * | 2020-11-19 | 2021-04-02 | 深圳市优优绿能电气有限公司 | Magnetic latching relay drive circuit |
| CN214542044U (en) * | 2021-04-07 | 2021-10-29 | 东莞铭普光磁股份有限公司 | Drive circuit of magnetic latching relay and magnetic latching relay circuit |
-
2022
- 2022-01-25 CN CN202210087194.8A patent/CN114420505B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0779147A (en) * | 1993-07-12 | 1995-03-20 | Yazaki Corp | Optical si thyristor drive circuit and protection circuit therefor |
| JP2000014192A (en) * | 1998-06-18 | 2000-01-14 | Toyota Motor Corp | Forward/backward revolution control circuit for vehicle-mounted motor |
| JP2004178967A (en) * | 2002-11-27 | 2004-06-24 | Kayaba Ind Co Ltd | Relay control device |
| CN203966976U (en) * | 2014-05-28 | 2014-11-26 | 武汉点线科技有限公司 | A kind of direct current relay drive circuit |
| CN105321770A (en) * | 2014-07-30 | 2016-02-10 | 上海电科电器科技有限公司 | Alternating current contactor controller and control method |
| CN105575729A (en) * | 2014-10-14 | 2016-05-11 | 北京谊安医疗系统股份有限公司 | Drive circuit of magnetic latching relay and control method thereof |
| CN207883611U (en) * | 2017-12-28 | 2018-09-18 | 东风商用车有限公司 | A kind of onboard relay high current control system of controller |
| CN207834198U (en) * | 2018-01-03 | 2018-09-07 | 河南康派智能技术有限公司 | A kind of magnetic latching relay driving device and a kind of magnetic latching relay |
| CN108923424A (en) * | 2018-08-12 | 2018-11-30 | 东莞市迅迪电子有限公司 | A kind of single-fire-wire electronic switch circuit |
| CN209880490U (en) * | 2019-07-09 | 2019-12-31 | 四川三秦电气有限责任公司 | Electromagnetic relay control circuit based on zero-crossing detection |
| CN111342666A (en) * | 2020-02-27 | 2020-06-26 | 西安微电子技术研究所 | Pulse trigger solid relay circuit for satellite |
| CN212032950U (en) * | 2020-02-27 | 2020-11-27 | 苏州斯普瑞英电子科技有限公司 | Magnetic latching relay drive circuit |
| CN112599384A (en) * | 2020-11-19 | 2021-04-02 | 深圳市优优绿能电气有限公司 | Magnetic latching relay drive circuit |
| CN214542044U (en) * | 2021-04-07 | 2021-10-29 | 东莞铭普光磁股份有限公司 | Drive circuit of magnetic latching relay and magnetic latching relay circuit |
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| Publication number | Publication date |
|---|---|
| CN114420505A (en) | 2022-04-29 |
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