CN204270979U - A kind of unicoil magnetic latching relay driving circuit - Google Patents
A kind of unicoil magnetic latching relay driving circuit Download PDFInfo
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- CN204270979U CN204270979U CN201420529052.3U CN201420529052U CN204270979U CN 204270979 U CN204270979 U CN 204270979U CN 201420529052 U CN201420529052 U CN 201420529052U CN 204270979 U CN204270979 U CN 204270979U
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- magnetic latching
- latching relay
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- 239000003990 capacitor Substances 0.000 claims abstract description 35
- 238000007599 discharging Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 230000007717 exclusion Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
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Abstract
The utility model relates to a kind of unicoil magnetic latching relay driving circuit, comprises signal and drives, charging circuit, discharge circuit.Relay coil and capacitances in series, by obtaining positive and negative pulse current to the discharge and recharge of electric capacity, realize controlling the open and close of relay.Charge circuit is made up of DC power supply, triode, diode, electric capacity and current-limiting resistance, and discharge loop is made up of electric capacity, current-limiting resistance and a pair Darlington transistor.When drive control signal is high level, charge circuit conducting, discharge loop ends, and DC power supply is charged to electrochemical capacitor by current-limiting resistance, and the sense of current flows to negative pole from the positive pole of coil, obtains direct impulse electric current, relay switch conducting; When drive control signal is low level, charge circuit ends, discharge loop conducting, and electrochemical capacitor, by the loop electric discharge in the other direction of the coil composition of electric discharge Darlington transistor, current-limiting resistance and magnetic latching relay, realizes the disconnection of magnetic latching relay switch.
Description
Technical field
The utility model relates to a kind of unicoil magnetic latching relay driving circuit.
Background technology
Magnetic latching relay is low, the reliable and stable bistable relay of a kind of energy consumption, adopts pulsed drive, when current impulse flows into coil, the then conducting of magnetic latching relay switch from the positive direction of regulation, and continues to keep conducting; When current impulse is oppositely flowed out from the positive direction of regulation, magnetic latching relay switch then disconnects, and continues to remain open.
Current magnetic latching relay drives special driving chip (the BL8023 chip as Shanghai Belling), but its specification indicates and is only applicable to the good WJ301-306 series of Shanghai bass special BST902 series and Wenzhou ten thousand, have certain applicable requirement to parameters such as relay coil internal resistances, versatility is not good.
Document " a kind of design of drive circuit of magnetic latching relay " adopts IR2110 chip drives power device, and the method controlled by bridge-type obtains forward and reverse drive current, thus reaches the object driving magnetic latching relay, and this circuit cost is higher.
In above-mentioned several drive circuit, adopt magnetic to keep the mode of special driving chip, once relay specifications and models change (as Coil resistance, switching current etc.), user cannot be adjusted by self-condition; And adopting IR2110 to drive the method for bridge circuit, cost is higher.
Summary of the invention
The purpose of this utility model is for the problems referred to above, a kind of unicoil magnetic latching relay driving circuit is proposed, adopt this drive circuit can carry out parameter adjustment according to different size relay easily, make it be suitable for different magnetic latching relays to drive, in addition, this drive circuit is with low cost.
For achieving the above object, the utility model adopts following technical proposals:
A kind of unicoil magnetic latching relay driving circuit, comprises control signal and drives, capacitor charging circuit, capacitor discharging circuit.
Magnetic retentive control signal is by high and low Automatic level control, and high level makes magnetic latching relay switch conduction, and low level makes switch disconnect.Control signal drives employing two pairs of Darlington transistors to drive, and exports the control signal level through amplifying from Darlington transistor collector electrode.
Magnetic latching relay coil being connected with electrochemical capacitor, by obtaining positive and negative pulse current to the charging of electrochemical capacitor and electric discharge, realizing controlling the open and close of magnetic latching relay.Charge circuit is made up of DC power supply, PNP charging triode, diode, electrochemical capacitor and current-limiting resistance; Discharge loop is made up of electrochemical capacitor, current-limiting resistance and a pair electric discharge Darlington transistor, and electrochemical capacitor and current-limiting resistance are the common sparing of magnetic latching relay drived control charge-discharge circuit.When magnetic keeps drive control signal to be high level, charge circuit conducting, discharge loop ends, DC power supply is charged to electrochemical capacitor by current-limiting resistance, charging current flows through the coil of magnetic latching relay simultaneously, and the sense of current flows to negative pole from the positive pole of coil, owing to charge circuit electric current will be caused to be 0 every straight effect after electrochemical capacitor capacity is full of, obtain direct impulse electric current, achieve the switch conduction of magnetic latching relay; When magnetic keeps drive control signal to be low level, charge circuit ends, discharge loop conducting, be full of the electrochemical capacitor after electricity and be equivalent to a DC power supply, it, by the loop electric discharge in the other direction of the coil composition of electric discharge Darlington transistor, current-limiting resistance and magnetic latching relay, realizes the disconnection of magnetic latching relay switch.
Control circuit adopts discrete component to build, and makes it meet the driving requirement of different magnetic latching relay by the component parameters arranging drive circuit.
Described magnetic latching relay is the magnetic latching relay that unicoil controls, when electric current flows into from coil electrode, and this relay switch conducting; When electric current flows out from coil electrode, this relay switch disconnects.The minimum drive current of the relay coil required by the magnetic latching relay of different capacity grade and retention time are also different.
Described Darlington transistor and PNP charging triode can be replaced with Mosfet power tube, and when the drive current required exceedes the electric current of Darlington transistor and the permission of charging triode, these devices can adopt Mosfet power tube to replace.
The utility model compared with prior art, there is following apparent outstanding substantive distinguishing features and remarkable advantage: the utility model device not only can realize magnetic latching relay switch conduction but also can realize the disconnection of magnetic latching relay switch by control signal in same circuit, is suitable for switching signal and controls.In addition, the resistance of adjustment charging and discharging circuit and the size of electrochemical capacitor realize changing the charging and discharging currents needed for magnetic latching relay coil and discharge and recharge time, make it be applicable to drive the magnetic latching relay of different size.Further, this driving circuit structure simplicity of design, with low cost.
Accompanying drawing explanation
Fig. 1 is the utility model magnetic latching relay drive principle figure
Ctr: drive control signal; 1: DC power supply; 2: the Darlington transistor that charge circuit conductivity control signal drives; 3: the Darlington transistor that discharge loop conductivity control signal drives; 4: pull-up exclusion; 5: discharge loop Darlington transistor; 6:PNP charges triode; 7: diode; 8: current-limiting resistance; 9: electrochemical capacitor; 10: unicoil magnetic latching relay.
Embodiment
Details are as follows by reference to the accompanying drawings for preferred embodiment of the present utility model:
The base stage of the Darlington transistor 2 that drive control signal Ctr and charge circuit conductivity control signal drive and the Darlington transistor 3 that discharge loop conductivity control signal drives is connected, the Darlington transistor 2 that charge circuit conductivity control signal drives is connected with DC power supply 1 by pull-up exclusion 4 with the collector electrode of the driving Darlington transistor 3 of discharge loop conductivity control signal, and charge circuit is made up of DC power supply 1, PNP charging triode 6, diode 7, current-limiting resistance 8, electrochemical capacitor 9 and magnetic latching relay 10; Discharge loop is made up of electrochemical capacitor 9, current-limiting resistance 8, electric discharge Darlington transistor 5 and magnetic latching relay 10, wherein current-limiting resistance 8 and electrochemical capacitor 9 are the common sparing of magnetic retentive control circuit, electrochemical capacitor negative pole is connected with the positive pole of magnetic latching relay coil, the minus earth of magnetic latching relay coil.
When Ctr is high level, driving Darlington transistor 3 conducting simultaneously of the Darlington transistor 2 that charge circuit conductivity control signal drives and discharge loop conductivity control signal, their collector terminal shows as low level, and electric discharge Darlington transistor 5 ends, and the conducting of PNP charging triode 6.Charge circuit forms closed-loop path, DC power supply 1 charges to electrochemical capacitor 9 through PNP charging triode 6, diode 7, current-limiting resistance 8, charging current flows through the coil of magnetic latching relay simultaneously, and the sense of current flows to negative pole from the positive pole of magnetic latching relay 10, the on-off switch of magnetic latching relay 10 will switch to conducting state from off state.After electrochemical capacitor 9 is full of, due to electrochemical capacitor 9 every straight effect, charging current is 0, and after this magnetic latching relay 10 is in conducting state all the time, relay coil no longer need maintain electric current.
When Ctr is low level, the driving Darlington transistor 3 of the Darlington transistor 2 that charge circuit conductivity control signal drives and discharge loop conductivity control signal ends simultaneously, their collector terminal shows as high level, and PNP charging triode 6 ends, and charge circuit is in off-state.Because electrochemical capacitor 9 during magnetic latching relay 10 conducting is filled electricity, now electrochemical capacitor 9 is equivalent to a DC power supply, the conducting of electric discharge Darlington transistor 5, discharge loop forms closed-loop path, electrochemical capacitor 9 discharges through current-limiting resistance 8 and electric discharge Darlington transistor 5, discharging current flows through the coil of magnetic latching relay simultaneously, and the sense of current flows to positive pole from the negative pole of magnetic latching relay, and the on-off switch of magnetic latching relay 10 will switch to off-state from conducting state.
Change the size of electrochemical capacitor 9 and current-limiting resistance 8 in drive circuit, different drive circuit electric currents and current duration can be obtained.
Claims (2)
1. a unicoil magnetic latching relay driving circuit, is characterized in that: comprise control signal driving, capacitor charging circuit, capacitor discharging circuit; Magnetic latching relay coil is connected with electrochemical capacitor, by obtaining positive and negative pulse current to the charging of electrochemical capacitor and electric discharge, realizes controlling the open and close of magnetic latching relay; Charge circuit is made up of DC power supply, PNP charging triode, diode, electrochemical capacitor and current-limiting resistance; Discharge loop is made up of electrochemical capacitor, current-limiting resistance and a pair electric discharge Darlington transistor, and electrochemical capacitor and current-limiting resistance are the common sparing of magnetic latching relay drived control charge-discharge circuit.
2. a kind of unicoil magnetic latching relay driving circuit according to claim 1, it is characterized in that: when magnetic keeps drive control signal to be high level, charge circuit conducting, discharge loop ends, DC power supply is charged to electrochemical capacitor by current-limiting resistance, charging current flows through the coil of magnetic latching relay simultaneously, and the sense of current flows to negative pole from the positive pole of coil, owing to charge circuit electric current will be caused to be 0 every straight effect after electrochemical capacitor capacity is full of, obtain direct impulse electric current, realize the switch conduction of magnetic latching relay; When magnetic keeps drive control signal to be low level, charge circuit ends, discharge loop conducting, be full of the electrochemical capacitor after electricity and be equivalent to a DC power supply, it, by the loop electric discharge in the other direction of the coil composition of electric discharge Darlington transistor, current-limiting resistance and magnetic latching relay, realizes the disconnection of magnetic latching relay switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420529052.3U CN204270979U (en) | 2014-09-12 | 2014-09-12 | A kind of unicoil magnetic latching relay driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420529052.3U CN204270979U (en) | 2014-09-12 | 2014-09-12 | A kind of unicoil magnetic latching relay driving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204270979U true CN204270979U (en) | 2015-04-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420529052.3U Expired - Fee Related CN204270979U (en) | 2014-09-12 | 2014-09-12 | A kind of unicoil magnetic latching relay driving circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN204270979U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107658970A (en) * | 2017-11-08 | 2018-02-02 | 柏宜照明（上海）股份有限公司 | A kind of relay protection circuit for fire-fighting equipment power supply |
-
2014
- 2014-09-12 CN CN201420529052.3U patent/CN204270979U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107658970A (en) * | 2017-11-08 | 2018-02-02 | 柏宜照明（上海）股份有限公司 | A kind of relay protection circuit for fire-fighting equipment power supply |
| CN107658970B (en) * | 2017-11-08 | 2024-05-14 | 柏宜照明（上海）股份有限公司 | Relay protection circuit for fire-fighting equipment power supply |
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Legal Events
| Date | Code | Title | Description |
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| 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: 20150415 Termination date: 20160912 |
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| CF01 | Termination of patent right due to non-payment of annual fee |