CN212032950U - Magnetic latching relay drive circuit - Google Patents
Magnetic latching relay drive circuit Download PDFInfo
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- CN212032950U CN212032950U CN202020216740.XU CN202020216740U CN212032950U CN 212032950 U CN212032950 U CN 212032950U CN 202020216740 U CN202020216740 U CN 202020216740U CN 212032950 U CN212032950 U CN 212032950U
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- relay
- diode
- triode
- drive
- magnetic latching
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Abstract
The utility model belongs to the technical field of the drive circuit technique and specifically relates to a magnetic latching relay drive circuit, including diode D1, relay K1, electric capacity C1, diode D1 is connected to the positive pole of drive power supply, diode D1 connects relay K1's drive end, electric capacity C1 is connected to relay K1's the other end, GND is connected to electric capacity C1's the other end, still include triode Q1, triode Q1's projecting pole is connected on the circuit between diode D1 and relay K1's drive end, triode Q1's collecting electrode is connected to GND, triode Q1's base is connected to the positive pole of drive power supply and is connected to GND through a resistance R1 simultaneously; the transistor Q1 is a PNP transistor. The utility model provides a magnetic latching relay drive circuit through electric capacity energy storage + falls the quick discharge reset design of electricity, accomplishes magnetic latching relay's actuation and automatic disconnection, is applicable to the disconnected relay or the contactor of disconnected operation of all direct current drive actuations.
Description
Technical Field
The utility model belongs to the technical field of the drive circuit technique and specifically relates to a magnetic latching relay drive circuit.
Background
In the relay, a magnetic latching relay is provided, the relay is switched on or off, power supply can be stopped only by short-time triggering, and then the state is kept through an internal permanent magnet, so that the driving current for maintaining the on-off state and the heating caused by the driving current are saved.
The relay has two trigger modes: the single coil drive uses the forward power supply to attract and reverse power supply to break, and the double coil drive attracts and breaks one coil and works independently.
The manufacturer recommends that two pulses of about 100 milliseconds are given during triggering, so that the digital control circuit such as a single chip microcomputer and the like can control the pulses conveniently.
However, the above method has several disadvantages:
the energy-saving mode cannot be driven by pulse without a single-chip microcomputer port, and energy is wasted by using the maintenance power supply mode for driving;
when the whole machine is in power failure, the singlechip is in fault, the singlechip is in local power failure and the like, the relay cannot be automatically disconnected and reset, and accidents can occur during next power-on;
the drive using a conventional relay is always maintained powered and also cannot directly reset off the magnetic latching relay.
In the existing solution in chinese patent CN203707030U, an NPN transistor is used to control a thyristor (which can be replaced by other switching elements such as IGBTs and transistors) to complete power-on pull-in, and after power-off, the controlled switching element is gradually powered on and then reversely discharged to achieve the purpose of turning off the relay.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the technical insufficiency and providing a magnetic latching relay drive circuit, can trigger the relay when drive voltage disappears and reset the disconnection.
In order to achieve the above object, the present invention provides a magnetic latching relay driving circuit, including diode D1, relay K1, electric capacity C1, diode D1 is connected to the positive pole of drive power supply, diode D1 connects the drive end of relay K1, electric capacity C1 is connected to the other end of relay K1, GND is connected to the other end of electric capacity C1, further including triode Q1, the emitter of triode Q1 is connected on the line between the drive ends of diode D1 and relay K1, the collector of triode Q1 is connected to GND, the base of triode Q1 is connected to the positive pole of drive power supply and is connected to GND through a resistor R1; the transistor Q1 is a PNP transistor.
In the technical scheme, when the circuit provides driving positive voltage, current charges the capacitor C1 through the diode D1 and the relay coil K1, when the current meets the pull-in requirement of the relay, the relay pulls in, the current stops after the capacitor is full, and the circuit does not consume energy any more. At this time, the transistor Q1 does not work because the base voltage of the transistor Q1 is higher than the emitter; when the driving voltage is turned off (or the driving voltage is lost due to power failure and circuit failure of any reason), the base electrode of the triode Q1 is pulled to the ground by the resistor, the current of the capacitor C1 flows from the emitter electrode to the base electrode through the coil of the relay K1, the emitter electrode collector short-circuit effect is achieved after the current is amplified, the stored electricity in the capacitor C1 is emptied quickly, the current reaches the threshold value of the reverse disconnection relay, and the relay is reset and disconnected.
The triode Q1 is replaced by a P-MOS tube or a Darlington PNP tube; in order to further reduce operating losses.
The utility model provides a magnetic latching relay drive circuit through electric capacity energy storage + falls the quick discharge reset design of electricity, accomplishes magnetic latching relay's actuation and automatic disconnection, is applicable to the disconnected relay or the contactor of disconnected operation of all direct current drive actuations.
Simultaneously the utility model has the advantages of it is following:
1. the conventional relay driving circuit can drive the magnetic latching relay;
2. when the driving voltage disappears due to any reason, the reset and disconnection result of the relay can be triggered;
3. almost no power is consumed in the working process, if a P-MOS tube is selected to replace a PNP triode or a Darlington PNP tube is used to replace a triode, the loss of R1 can be almost ignored;
4. all magnetic latching relays and contactors and non-magnetic latching conventional relays and contactors are compatible.
CN203707030U and the utility model discloses contrast, a multi-purpose switching element needs a set of RC component to realize by the daily shutoff of controlled switching element, and the outage conduction process, the process is complicated, and the component quantity is many its R2C1 has charge-discharge time constant, can not move immediately after the drive outage, has the delay. R2 should not be too large, otherwise a too long delay time would make the off-time too long, but not too small, otherwise the sustained loss would be too large.
Drawings
Fig. 1 is a circuit diagram of the present invention.
Detailed Description
The invention is further described by the following embodiments in conjunction with the accompanying drawings.
Example 1:
as shown in fig. 1, the magnetic latching relay driving circuit described in this embodiment includes a diode D1, a relay K1, a capacitor C1, a diode D1 connected to the positive electrode of the driving power supply, a diode D1 connected to the driving terminal of the relay K1, a capacitor C1 connected to the other terminal of the relay K1, and a transistor Q1 connected to the other terminal of the capacitor C1 and GND, wherein an emitter of the transistor Q1 is connected to a line between the diode D1 and the driving terminal of the relay K1, a collector of the transistor Q1 is connected to GND, and a base of the transistor Q1 is connected to the positive electrode of the driving power supply and GND through a resistor R1; the transistor Q1 is a PNP transistor.
Example 2:
the magnetic latching relay driving circuit described in this embodiment includes a diode D1, a relay K1, a capacitor C1, a diode D1 connected to the positive electrode of the driving power supply, a diode D1 connected to the driving end of the relay K1, a capacitor C1 connected to the other end of the relay K1, and a GND connected to the other end of the capacitor C1, and further includes a darlington PNP transistor, an emitter of the darlington PNP transistor is connected to a line between the diode D1 and the driving end of the relay K1, a collector of the darlington PNP transistor is connected to GND, and a base of the darlington PNP transistor is connected to the positive electrode of the driving power supply and is connected to GND through a resistor R1; wherein the Darlington PNP tube is a PNP triode.
Example 3:
the magnetic latching relay driving circuit described in this embodiment includes a diode D1, a relay K1, a capacitor C1, a diode D1 connected to the positive electrode of the driving power supply, a diode D1 connected to the driving end of the relay K1, a capacitor C1 connected to the other end of the relay K1, and a GND connected to the other end of the capacitor C1, and further includes a P-MOS transistor, an emitter of the P-MOS transistor is connected to a line between the diode D1 and the driving end of the relay K1, a collector of the P-MOS transistor is connected to the GND, and a base of the P-MOS transistor is connected to the positive electrode of the driving power supply and is connected to the GND through a resistor R1; wherein the P-MOS tube is a PNP triode.
Claims (2)
1. A magnetic latching relay drive circuit is characterized in that: the power supply circuit comprises a diode D1, a relay K1 and a capacitor C1, wherein the positive electrode of the drive power supply is connected with a diode D1, a diode D1 is connected with the driving end of a relay K1, the other end of the relay K1 is connected with a capacitor C1, the other end of a capacitor C1 is connected with GND, the power supply circuit further comprises a triode Q1, the emitter of the triode Q1 is connected on a line between the diode D1 and the driving end of the relay K1, the collector of the triode Q1 is connected with the GND, and the base of the triode Q1 is connected with the positive electrode of the drive power supply and is connected; the transistor Q1 is a PNP transistor.
2. A magnetic latching relay drive circuit as claimed in claim 1, wherein: the triode Q1 is replaced by a P-MOS tube or a Darlington PNP tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020216740.XU CN212032950U (en) | 2020-02-27 | 2020-02-27 | Magnetic latching relay drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020216740.XU CN212032950U (en) | 2020-02-27 | 2020-02-27 | Magnetic latching relay drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212032950U true CN212032950U (en) | 2020-11-27 |
Family
ID=73492165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020216740.XU Expired - Fee Related CN212032950U (en) | 2020-02-27 | 2020-02-27 | Magnetic latching relay drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212032950U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114093722A (en) * | 2021-11-26 | 2022-02-25 | 中国兵器工业集团第二一四研究所苏州研发中心 | Drive circuit of double-coil magnetic latching relay |
| CN114420505A (en) * | 2022-01-25 | 2022-04-29 | 西安微电子技术研究所 | Circuit for solving small current failure of magnetic latching relay |
-
2020
- 2020-02-27 CN CN202020216740.XU patent/CN212032950U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114093722A (en) * | 2021-11-26 | 2022-02-25 | 中国兵器工业集团第二一四研究所苏州研发中心 | Drive circuit of double-coil magnetic latching relay |
| CN114093722B (en) * | 2021-11-26 | 2024-05-28 | 中国兵器工业集团第二一四研究所苏州研发中心 | Driving circuit of double-coil magnetic latching relay |
| CN114420505A (en) * | 2022-01-25 | 2022-04-29 | 西安微电子技术研究所 | Circuit for solving small current failure of magnetic latching relay |
| CN114420505B (en) * | 2022-01-25 | 2023-05-30 | 西安微电子技术研究所 | Circuit for solving small current failure of magnetic latching relay |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201127 |