CN210607112U - Magnetic latching relay drive circuit and magnetic latching relay with same - Google Patents
Magnetic latching relay drive circuit and magnetic latching relay with same Download PDFInfo
- Publication number
- CN210607112U CN210607112U CN201921416648.1U CN201921416648U CN210607112U CN 210607112 U CN210607112 U CN 210607112U CN 201921416648 U CN201921416648 U CN 201921416648U CN 210607112 U CN210607112 U CN 210607112U
- Authority
- CN
- China
- Prior art keywords
- circuit
- power supply
- magnetic latching
- latching relay
- resistor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Relay Circuits (AREA)
Abstract
The utility model discloses a magnetic latching relay drive circuit and have its magnetic latching relay, magnetic latching relay drive circuit includes delay trigger circuit, tank circuit, loses electric trigger circuit and bridge type drive circuit, and delay trigger circuit is used for when the power supply end has the power supply, exports delay trigger signal in the time of predetermineeing; the energy storage circuit is used for storing electric energy when the power supply end supplies power and outputting a second power supply signal when the power supply end is powered off; the power-off trigger circuit is used for outputting a power-off trigger signal when detecting a power supply signal; the bridge type driving circuit is used for providing current in a first direction for the magnetic latching relay coil within preset time when the delay trigger signal is detected, and providing current in a second direction for the magnetic latching relay coil when the power-off trigger signal is detected. The utility model discloses a drive circuit and magnetic latching relay when losing the electricity, still can drive the relay disconnection, improve the security.
Description
Technical Field
The utility model belongs to the technical field of circuit design technique and specifically relates to a magnetic latching relay drive circuit is related to and magnetic latching relay including this drive circuit.
Background
The working principle of the magnetic latching relay is as follows: the permanent magnet is added in the original relay coil design, and after the coil is electrified, the magnetic field provided by the coil and the permanent magnet triggers the relay to be attracted; after the current of the coil is cut off, the magnetic field of the permanent magnet can maintain the attraction state of the relay; if the relay is to be turned off, a reverse current needs to be supplied to the coil, so that the magnetic field generated by the coil is cancelled out by the magnetic field of the permanent magnet.
The common drive design method of the magnetic latching relay comprises the following steps: two coils are designed in the relay, an external system controls one coil to be electrified, the relay is attracted, after the system is powered off, the relay keeps the attraction state, then power is supplied to the other coil to provide a reverse magnetic field, and the relay is disconnected; or, the single coil relay is controlled by an external system to provide forward or reverse current for the coil, but after the relay is attracted, when the system is abnormally powered off, the relay cannot be disconnected because the coil cannot be supplied with the reverse current, and when the system recovers electric power next time and a relay disconnection instruction is not given, the relay can always keep an attraction state, so that potential safety hazards exist.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least.
Therefore, an object of the present invention is to provide a magnetic protection relay driving circuit, which can also disconnect the magnetic protection relay when the external power is off, thereby improving the safety.
Another object of the present invention is to provide a magnetic latching relay with the driving circuit.
In order to solve the above problem, the magnetic protection relay driving circuit according to an embodiment of the first aspect of the present invention includes: the delay circuit comprises a delay trigger circuit, a first input end of the delay trigger circuit is connected with a first power supply end, a second input end of the delay trigger circuit is connected with a second power supply end, and the delay trigger circuit is used for outputting a delay trigger signal within a preset time when the first power supply end and the second power supply end supply power; the first end of the energy storage circuit is connected with the first power supply end, the second end of the energy storage circuit is connected with the second power supply end, and the energy storage circuit is used for storing electric energy when the first power supply end and the second power supply end supply power and outputting a second power supply signal when the first power supply end and the second power supply end are powered off; a first input end of the power-off trigger circuit is connected with a first end of the energy storage circuit, and a second input end of the power-off trigger circuit is connected with a second end of the energy storage circuit, and is used for outputting a power-off trigger signal when the power supply signal is detected; a bridge driving circuit, a first input end of the bridge driving circuit is connected with a first output end of the delay trigger circuit, the second input end of the bridge type driving circuit is connected with the second output end of the time delay trigger circuit, the third input end of the bridge type driving circuit is connected with the first output end of the power-off trigger circuit, the fourth input end of the bridge type driving circuit is connected with the second output end of the power-off trigger circuit, a first output terminal of the bridge drive circuit is connected to a first terminal of the magnetic latching relay coil, the second output end of the bridge type driving circuit is connected with the second end of the magnetic latching relay coil and is used for detecting the time delay trigger signal, and providing current in a first direction for the magnetic latching relay coil within preset time, and providing current in a second direction for the magnetic latching relay coil when the power-off trigger signal is detected.
According to the utility model discloses magnetic latching relay drive circuit, when having the power supply, through time delay trigger circuit and bridge type drive circuit, can provide the electric current of the required direction of actuation for magnetic latching relay in the time delay, thereby realize normally actuation at the relay, after reaching the preset time, the actuation also can be maintained to the relay, do not influence magnetic latching relay and save the electric energy, it generates heat to reduce the coil, reduce the function of electromagnetic field radiation and noise, and, when no power supply, through energy storage circuit, lose electric trigger circuit and bridge type drive circuit, for the electric current of the required direction of disconnection of magnetic latching relay coil, realize the normal disconnection of relay, and the safety is improved.
In some embodiments, the delay trigger circuit comprises: a first end of the delay sub-circuit is connected with the first power supply end, and a second end of the delay sub-circuit is connected with the second power supply end;
the control end of the first switch tube is connected with the third end of the delay sub-circuit, the first end of the first switch tube is connected with the first power supply end through a first resistor and a second resistor, and the second end of the first switch tube is connected with the second power supply end.
In some embodiments, the delay sub-circuit comprises: a third resistor, a first end of the third resistor being connected to the first power supply end; a first end of the first capacitor is connected with a second end of the third resistor; a first end of the fourth resistor is connected with the second end of the first capacitor; and a first node is arranged between the second end of the first capacitor and the first end of the fourth resistor, and the first node is connected with the control end of the first switching tube.
In some embodiments, the power-down trigger circuit comprises: the first end of the fifth resistor is connected with the first end of the energy storage circuit, the first end of the sixth resistor is connected with the second end of the fifth resistor, the second end of the sixth resistor is connected with the first end of the first diode, the second end of the first diode is connected with the first power supply end, and a second node is arranged between the second end of the fifth resistor and the first end of the sixth resistor; and the control end of the second switching tube is connected with the second node, the first end of the second switching tube is connected with the first end of the energy storage circuit, the second end of the second switching tube is connected with the second end of the energy storage circuit through a seventh resistor and an eighth resistor, and a third node is arranged between the seventh resistor and the eighth resistor.
In some embodiments, the bridge driver circuit comprises: a control end of the third switching tube is connected between the first resistor and the second resistor, a first end of the third switching tube is connected with the first power supply end, and a second end of the third switching tube is connected with a first end of the magnetic latching relay coil;
a control end of the fourth switching tube is connected with the first node and the control end of the first switching tube respectively, a first end of the fourth switching tube is connected with the second power supply end, and a second end of the fourth switching tube is connected with a second end of the magnetic latching relay coil; a control end of the fifth switching tube is connected with the second node and the control end of the second switching tube respectively, a first end of the fifth switching tube is connected with a first end of the energy storage circuit, and a second end of the fifth switching tube is connected with a second end of the magnetic latching relay coil; and the control end of the sixth switching tube is connected with the third node, the first end of the sixth switching tube is connected with the second end of the energy storage circuit, and the second end of the sixth switching tube is connected with the first end of the magnetic latching relay coil.
In some embodiments, the magnetic latching relay drive circuit further comprises: and the first end of the first voltage stabilizing circuit is connected with the first power supply end, and the second end of the first voltage stabilizing circuit is connected between the first resistor and the second resistor and is connected with the control end of the third switching tube.
In some embodiments, the magnetic latching relay drive circuit further comprises: and a first end of the second voltage stabilizing circuit is connected with a second end of the energy storage circuit, and a second end of the second voltage stabilizing circuit is respectively connected with the third node and the control end of the sixth switching tube.
In some embodiments, the magnetic latching relay drive circuit further comprises: and the isolation circuit is arranged between the delay trigger circuit and the power-off trigger circuit and is used for isolating the delay trigger circuit from the power-off trigger circuit.
In some embodiments, the first switch tube is an N-type MOS tube, the second switch tube is a P-type MOS tube, the third switch tube is a P-type MOS tube, the fourth switch tube is an N-type MOS tube, the first switch tube is a P-type MOS tube, and the sixth switch tube is an N-type MOS tube.
Based on the magnetic latching relay drive circuit of above embodiment, the utility model discloses the magnetic latching relay of second aspect embodiment, including coil, permanent magnet and magnetic latching relay drive circuit.
According to the utility model discloses magnetic latching relay through adopting the magnetic latching relay drive circuit of above embodiment, can externally lose when electric, and drive relay breaks off, improves the security.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a functional block diagram of a magnetic latching relay drive circuit according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a magnetic latching relay drive circuit according to an embodiment of the present invention;
fig. 3 is a graph of the current change of a coil of a magnetic latching relay according to one embodiment of the present invention;
fig. 4 is a schematic diagram of a magnetic latching relay according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention are described in detail below, and the embodiments described with reference to the drawings are exemplary.
A magnetic latching relay drive circuit according to an embodiment of the present invention is described below with reference to fig. 1 to 3.
The utility model discloses magnetic latching relay drive circuit, can integrate inside magnetic latching relay, and the risk of the unable disconnection of relay when avoiding the unusual outage of system to and can make magnetic latching relay like ordinary relay's break-make electric control state the same, the relay actuation when supplying power for the relay input promptly, the posterous electrical apparatus of stopping supplying power breaks off naturally.
Fig. 1 is a functional block diagram of a magnetic latching relay driving circuit according to an embodiment of the present invention, as shown in fig. 1, a magnetic latching relay driving circuit 1 according to an embodiment of the present invention includes a delay trigger circuit 10, an energy storage circuit 20, a power-off trigger circuit 30, and a bridge driving circuit 40.
The first input end of the delay trigger circuit 10 is connected to a first power supply end, such as an IN +, the second input end of the delay trigger circuit 10 is connected to a second power supply end, such as an IN +, and the delay trigger circuit 10 is configured to output a delay trigger signal within a preset time when power is supplied to the first power supply end and the second power supply end.
The first end of the energy storage circuit 20 is connected to the first power supply terminal IN +, the second end of the energy storage circuit 20 is connected to the second power supply terminal IN-, and the energy storage circuit 20 is configured to store electric energy when the first power supply terminal IN + and the second power supply terminal IN-are powered on, and output a power supply signal when the first power supply terminal IN + and the second power supply terminal IN-are powered off.
The first input end of the power-off trigger circuit 30 is connected to the first end of the energy storage circuit 20, the second input end of the power-off trigger circuit 30 is connected to the second end of the energy storage circuit 20, and the power-off trigger circuit 30 is configured to output a power-off trigger signal when detecting a power supply signal output by the energy storage circuit 20.
The first input end of the bridge type driving circuit 40 is connected with the first output end of the delay trigger circuit 10, the second input end of the bridge type driving circuit 40 is connected with the second output end of the delay trigger circuit 10, the third input end of the bridge type driving circuit 40 is connected with the first output end of the power-off trigger circuit 30, the fourth input end of the bridge type driving circuit 40 is connected with the second output end of the power-off trigger circuit 30, the first output end of the bridge type driving circuit 40, such as OUT +, is connected with the first end of the magnetic latching relay coil, and the second output end of the bridge type driving circuit 40, such as OUT-, is connected with the second end of the magnetic latching relay coil.
Specifically, when the power supply of the magnetic latching relay supplies power normally, the first power supply terminal IN + and the second power supply terminal IN-output current to the delay trigger circuit 10, and the delay trigger circuit 10 outputs a power supply delay signal to the bridge drive circuit 40. Meanwhile, the energy storage circuit 20 stores energy by outputting the electric energy to the energy storage circuit 20 through the first power supply terminal IN + and the second power supply terminal IN-, and the energy storage circuit 20 is fully charged within the delay time. The bridge driving circuit 40 is configured to provide a current in a first direction for the magnetic latching relay coil within a preset time when the delay trigger signal is detected, for example, provide a forward current for the magnetic latching relay coil through the first output terminal OUT + and the second output terminal OUT-, so that the magnetic latching relay is attracted, and then after the delay time is reached, the bridge driving circuit 40 stops providing the forward current, but the magnetic latching relay can also maintain the attraction.
When the power supply of the magnetic latching relay is failed or abnormally powered off, the first power supply terminal IN + and the second power supply terminal IN-stop supplying power, at the moment, the energy storage circuit 20 outputs electric energy, the power-off trigger circuit 30 detects a power supply signal and outputs the power-off trigger signal to the bridge type driving circuit 40, the bridge type driving circuit 40 provides current IN a second direction for the coil of the magnetic latching relay when detecting the power-off trigger signal, for example, reverse current is provided for the coil of the magnetic latching relay through the second output terminal OUT-and the first output terminal OUT +, so that a magnetic field generated by the coil is offset with a magnetic field generated by a permanent magnet of the magnetic latching relay, the relay is disconnected, accidents and the like caused by the fact that the relay keeps attracting when the electric power is recovered and the instruction is not given to the relay are avoided, and the safety is.
According to the utility model discloses magnetic latching relay drive circuit 1, when having the power supply, through time delay trigger circuit 10 and bridge type drive circuit 40, can provide the electric current of the required direction of actuation for magnetic latching relay in the time delay, thereby realize normally the actuation at the relay, after reaching the preset time, the actuation also can be maintained to the relay, do not influence magnetic latching relay and save the electric energy, it generates heat to reduce the coil, reduce the function of electromagnetic field radiation and noise, and, when no power supply, through energy storage circuit 20, lose electric trigger circuit 30 and bridge type drive circuit 40, for the electric current of the required direction of disconnection of magnetic latching relay coil, realize the normal disconnection of relay, improve the security.
Each circuit block is further described below with reference to fig. 2.
Fig. 2 is a circuit diagram of a magnetic protection relay driving circuit according to an embodiment of the present invention, as shown IN fig. 2, a delay trigger circuit 10 of the embodiment of the present invention includes a delay sub-circuit 11 and a first switch tube Q1, wherein a first end of the delay sub-circuit 11 is connected to a first power supply terminal IN +, and a second end of the delay sub-circuit 11 is connected to a second power supply terminal IN-; the control end of the first switch tube Q1 is connected to the third end of the delay sub-circuit 11, the first end of the first switch tube Q1 is connected to the first power supply terminal IN + through the first resistor R1 and the second resistor R2, and the second end of the first switch tube Q1 is connected to the second power supply terminal IN-.
Specifically, when the power supply terminal (IN +, IN-) provides power, for example, 12V voltage, the delay sub-circuit 11 starts to operate, when the delay sub-circuit 11 is charging, the voltage of the control terminal of the first switch Q1 gradually increases, when the voltage increases to the conducting voltage value, the first switch Q1 is turned on, so as to output a delay trigger signal to the bridge driving circuit 40, and then the bridge driving circuit 40 provides a first direction, for example, a forward current, for the magnetic latching relay coil, and the relay is pulled IN, after the delay sub-circuit 11 is fully charged, the first switch Q1 is turned off, and the bridge driving circuit 40 stops providing the forward current, at this time, the relay can also maintain the pull IN without affecting the functions of the magnetic latching relay, such as saving power, reducing coil heating, and reducing electromagnetic field radiation and noise.
Further, the delay sub-circuit 11 may adopt an RC delay circuit, as shown IN fig. 2, the delay sub-circuit 11 includes a third resistor R3, a first capacitor C2, and a fourth resistor R4, wherein a first end of the third resistor R3 is connected to the first power supply terminal IN +; a first end of the first capacitor C2 is connected with a second end of the third resistor R3; a first end of the fourth resistor R4 is connected with a second end of the first capacitor C2; a first node O1 is disposed between the second terminal of the first capacitor C2 and the first terminal of the fourth resistor R4, and the first node O1 is connected to the control terminal of the first switch tube 12.
Specifically, when the power supply terminals (IN +, IN-) provide power, for example, 12V voltage, the delay sub-circuit 11 starts to operate, and during the process of charging the first capacitor C2, the first switch Q1, for example, an N-type MOS transistor, is turned on, and outputs a delay trigger signal to the bridge driving circuit 40.
As shown in fig. 2, the power-off trigger circuit 30 includes a fifth resistor R5, a sixth resistor R6, a first diode D1, and a second switch Q2. A first end of the fifth resistor R5 is connected to a first end of the tank circuit 20, a first end of the sixth resistor R6 is connected to a second end of the fifth resistor R5, a second end of the sixth resistor R6 is connected to a first end of a first diode D1, a second end of the first diode D1 is connected to a first power supply terminal IN +, and a second node O2 is provided between the second end of the fifth resistor R5 and the first end of the sixth resistor R6; a control end of the second switching tube Q2 is connected to the second node O2, a first end of the second switching tube Q2 is connected to a first end of the energy storage circuit 20, a second end of the second switching tube Q2 is connected to a second end of the energy storage circuit 20 through a seventh resistor R7 and an eighth resistor R8, and a third node O3 is provided between the seventh resistor R7 and the eighth resistor R8.
Specifically, when the power supply end stops supplying power, the energy storage circuit 20 provides 12V voltage, the power-off trigger circuit 30 starts working at the moment, the second switch tube Q2 is switched on, the power-off trigger signal is output to the bridge type driving circuit 40, and then the bridge type driving circuit 40 provides reverse current for the magnetic latching relay coil, and because the magnetic field generated by the coil and the magnetic field generated by the permanent magnet can be offset, the relay is switched off, and the safety is improved.
In an embodiment, the bridge driver circuit 40 may employ four open-tube circuits to provide currents in different directions to the magnetic latching relay coil under different power conditions. As shown in fig. 2, the bridge driving circuit 40 may include a third switching tube Q3, a fourth switching tube Q4, a fifth switching tube Q5, and a sixth switching tube Q6.
The control end of the third switching tube Q3 is connected between the first resistor R1 and the second resistor R2, the first end of the third switching tube Q3 is connected with the first power supply end IN +, and the second end of the third switching tube Q3 is connected with the first end of the magnetic latching relay coil; the control end of a fourth switching tube Q4 is respectively connected with the first node O1 and the control end of the first switching tube Q1, the first end of the fourth switching tube Q4 is connected with a second power supply end IN-, and the second end of the fourth switching tube Q4 is connected with the second end of the magnetic latching relay coil; a control end of the fifth switching tube Q5 is connected with the second node O2 and the control end of the second switching tube Q2, respectively, a first end of the fifth switching tube Q5 is connected with a first end of the energy storage circuit 20, and a second end of the fifth switching tube Q5 is connected with a second end of the magnetic latching relay coil; a control terminal of the sixth switching tube Q6 is connected to the third node O3, a first terminal of the sixth switching tube Q6 is connected to the second terminal of the tank circuit 20, and a second terminal of the sixth switching tube Q6 is connected to the first terminal of the magnetic latching relay coil.
In some embodiments, the second switch tube is a P-type MOS tube, the third switch tube is a P-type MOS tube, the fourth switch tube is an N-type MOS tube, the first switch tube is a P-type MOS tube, and the sixth switch tube is an N-type MOS tube. Of course, each switch tube may also be other types of switch tubes such as enhancement MOS transistor, field effect transistor, triode, etc. which can implement the switch function of the embodiment of the present invention.
IN an embodiment, as shown IN fig. 2, the magnetic latching relay driving circuit 1 further includes a first regulator circuit 50, a first end 50 of the first regulator circuit is connected to the first power supply terminal IN +, and a second end of the first regulator circuit 50 is connected between the first resistor R1 and the second resistor R2, and is connected to a control terminal of the third switching tube Q3. For example, the first voltage regulator circuit 50 may be implemented by a voltage regulator or a capacitor, and plays a role of voltage regulation.
As shown in fig. 2, the magnetic latching relay driving circuit 1 according to the embodiment of the present invention may further include a second voltage stabilizing circuit 60, a first end of the second voltage stabilizing circuit 60 is connected to the second end of the energy storage circuit 20, and a second end of the second voltage stabilizing circuit 60 is connected to the third node O3 and the control end of the sixth switching tube Q6, respectively. In an embodiment, the second voltage stabilizing circuit 60 may be implemented by a voltage regulator and a capacitor, and plays a role of voltage stabilization.
As shown in fig. 2, the magnetic latching relay driving circuit 1 according to the embodiment of the present invention may further include an isolation circuit 70, where the isolation circuit 70 is disposed between the delay trigger circuit 10 and the power-off trigger circuit 30, and is used to isolate the delay trigger circuit 10 from the power-off trigger circuit 30. In an embodiment, the isolation circuit 70 may be implemented by a diode, and may isolate the delay trigger circuit 10 from the main circuit to avoid interference. A resistor R0 is also provided IN fig. 2 between the first supply terminal IN + and the second supply terminal IN-.
Specifically, as shown IN fig. 2, when the power supply terminal (IN +, IN-) supplies power, for example, 12V voltage, the delay sub-circuit 11 starts to operate, and during the process of charging the first capacitor C2, the first switch Q1, for example, an N-type MOS transistor, is turned on, and outputs a delay trigger signal to the bridge driving circuit 40. And then the third switch tube Q3 and the fourth switch tube Q4 are conducted, the capacitor C3 plays a role in stabilizing voltage, other switch tubes are in a cut-off state, at the moment, forward current is provided for the magnetic latching relay coil through the output end OUT + and the output end OUT-, and the relay is attracted. At this time, the voltages at the positive and negative ends of the isolation circuit 70, such as the diode D2, are substantially equal, the power-off triggering circuit 30 does not operate, the remaining light-on tube is in the cut-off state, and the energy storage circuit 20, such as the energy storage capacitor, is fully charged. When the first capacitor C2 of the delay sub-circuit 11 is fully charged, that is, the preset time is reached, the third switch tube Q3 and the fourth switch tube Q4 are cut off, the relay is maintained in the attraction state by the magnetic field provided by the permanent magnet, so that the power consumption of the coil can be reduced, the coil is prevented from heating, and the radiation and noise of the electromagnetic field are reduced.
After the power supply ends (IN + and IN-) are stopped to be supplied with power, the energy storage capacitor provides 12V voltage at the moment, the voltage difference between two ends of the diode D2 is obvious, the power-off trigger circuit 30 starts to work, the second switch tube Q2 is conducted, the fifth switch tube Q5 and the sixth switch tube Q6 of the bridge type driving circuit 40 are conducted, the capacitor C4 plays a role IN voltage stabilization, the energy storage capacitor C2 discharges a coil with a smaller resistance value quickly, reverse current flows IN the coil, the relay can be disconnected successfully, and safety is improved.
Based on the magnetic latching relay driving circuit 1 of the above embodiment, as shown in fig. 3, it is a graph of the current change of the coil of the magnetic latching relay according to an embodiment of the present invention, wherein the power is supplied when T is 0s and the power supply is stopped when T is 0.5s, after the power supply, there is a delay time during which the delay triggering circuit 10 starts charging, when the conducting voltage of the first switching tube Q1 is reached, the first switching tube Q1 is conducted, the third switching tube Q3 and the fourth switching tube Q4 are conducted, the coil is supplied with the forward current, and after the preset time, that is, the charging capacitor is fully charged, the coil is stopped from being supplied with the forward current, and the current in the coil is zero. The power supply end stops supplying power, the energy storage circuit 20 supplies power, the second switch tube Q2, the fifth switch tube Q5 and the sixth switch tube Q6 are connected, reverse current is provided for the coil, the relay is disconnected, discharging is completed in the energy storage circuit 20, and the coil current becomes zero along with discharging of the energy storage circuit 20.
In summary, the utility model discloses magnetic latching relay drive circuit 1 based on time delay trigger circuit 10, energy memory circuit 20, lose electric trigger circuit 30 and bridge type drive circuit 40, can realize magnetic latching relay, and normal actuation when the power supply still can make the relay disconnection when losing the electricity, improves the security.
Based on the magnetic latching relay drive circuit of the above embodiment, the drive circuit may be integrated in a magnetic latching relay, as shown in fig. 4, which is a functional block diagram of a magnetic latching relay according to an embodiment of the present invention, the magnetic latching relay 100 includes the magnetic latching relay drive circuit 1 of the above embodiment, the coil 2, and the permanent magnet 3, wherein the circuit structure of the magnetic latching relay drive circuit 1 may refer to the description of the above embodiment.
According to the utility model discloses magnetic latching relay 100, through adopting the magnetic latching relay drive circuit 1 of above embodiment, can externally lose when electric, the disconnection of drive relay improves the security.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A magnetically held relay drive circuit, comprising:
the delay circuit comprises a delay trigger circuit, a first input end of the delay trigger circuit is connected with a first power supply end, a second input end of the delay trigger circuit is connected with a second power supply end, and the delay trigger circuit is used for outputting a delay trigger signal within a preset time when the first power supply end and the second power supply end supply power;
the first end of the energy storage circuit is connected with the first power supply end, the second end of the energy storage circuit is connected with the second power supply end, and the energy storage circuit is used for storing electric energy when the first power supply end and the second power supply end supply power and outputting a second power supply signal when the first power supply end and the second power supply end are powered off;
a first input end of the power-off trigger circuit is connected with a first end of the energy storage circuit, and a second input end of the power-off trigger circuit is connected with a second end of the energy storage circuit, and is used for outputting a power-off trigger signal when the power supply signal is detected;
a bridge driving circuit, a first input end of the bridge driving circuit is connected with a first output end of the delay trigger circuit, the second input end of the bridge type driving circuit is connected with the second output end of the time delay trigger circuit, the third input end of the bridge type driving circuit is connected with the first output end of the power-off trigger circuit, the fourth input end of the bridge type driving circuit is connected with the second output end of the power-off trigger circuit, a first output terminal of the bridge drive circuit is connected to a first terminal of the magnetic latching relay coil, the second output end of the bridge type driving circuit is connected with the second end of the magnetic latching relay coil and is used for detecting the time delay trigger signal, and providing current in a first direction for the magnetic latching relay coil within preset time, and providing current in a second direction for the magnetic latching relay coil when the power-off trigger signal is detected.
2. The magnetic latching relay drive circuit of claim 1, wherein the time delay trigger circuit comprises:
a first end of the delay sub-circuit is connected with the first power supply end, and a second end of the delay sub-circuit is connected with the second power supply end;
the control end of the first switch tube is connected with the third end of the delay sub-circuit, the first end of the first switch tube is connected with the first power supply end through a first resistor and a second resistor, and the second end of the first switch tube is connected with the second power supply end.
3. The magnetic latching relay drive circuit of claim 2, wherein the delay sub-circuit comprises:
a third resistor, a first end of the third resistor being connected to the first power supply end;
a first end of the first capacitor is connected with a second end of the third resistor;
a first end of the fourth resistor is connected with the second end of the first capacitor;
and a first node is arranged between the second end of the first capacitor and the first end of the fourth resistor, and the first node is connected with the control end of the first switching tube.
4. The magnetic latching relay drive circuit of claim 3, wherein the power-down trigger circuit comprises:
the first end of the fifth resistor is connected with the first end of the energy storage circuit, the first end of the sixth resistor is connected with the second end of the fifth resistor, the second end of the sixth resistor is connected with the first end of the first diode, the second end of the first diode is connected with the first power supply end, and a second node is arranged between the second end of the fifth resistor and the first end of the sixth resistor;
and the control end of the second switching tube is connected with the second node, the first end of the second switching tube is connected with the first end of the energy storage circuit, the second end of the second switching tube is connected with the second end of the energy storage circuit through a seventh resistor and an eighth resistor, and a third node is arranged between the seventh resistor and the eighth resistor.
5. The magnetic latching relay drive circuit according to claim 4, wherein the bridge drive circuit comprises:
a control end of the third switching tube is connected between the first resistor and the second resistor, a first end of the third switching tube is connected with the first power supply end, and a second end of the third switching tube is connected with a first end of the magnetic latching relay coil;
a control end of the fourth switching tube is connected with the first node and the control end of the first switching tube respectively, a first end of the fourth switching tube is connected with the second power supply end, and a second end of the fourth switching tube is connected with a second end of the magnetic latching relay coil;
a control end of the fifth switching tube is connected with the second node and the control end of the second switching tube respectively, a first end of the fifth switching tube is connected with a first end of the energy storage circuit, and a second end of the fifth switching tube is connected with a second end of the magnetic latching relay coil;
and the control end of the sixth switching tube is connected with the third node, the first end of the sixth switching tube is connected with the second end of the energy storage circuit, and the second end of the sixth switching tube is connected with the first end of the magnetic latching relay coil.
6. The magnetic latching relay drive circuit according to claim 5, further comprising:
and the first end of the first voltage stabilizing circuit is connected with the first power supply end, and the second end of the first voltage stabilizing circuit is connected between the first resistor and the second resistor and is connected with the control end of the third switching tube.
7. The magnetic latching relay drive circuit according to claim 5, further comprising:
and a first end of the second voltage stabilizing circuit is connected with a second end of the energy storage circuit, and a second end of the second voltage stabilizing circuit is respectively connected with the third node and the control end of the sixth switching tube.
8. The magnetic latching relay drive circuit according to claim 1, further comprising:
and the isolation circuit is arranged between the delay trigger circuit and the power-off trigger circuit and is used for isolating the delay trigger circuit from the power-off trigger circuit.
9. The magnetic latching relay drive circuit according to claim 5, wherein the first switch transistor is an N-type MOS transistor, the second switch transistor is a P-type MOS transistor, the third switch transistor is a P-type MOS transistor, the fourth switch transistor is an N-type MOS transistor, the first switch transistor is a P-type MOS transistor, and the sixth switch transistor is an N-type MOS transistor.
10. A magnetic latching relay comprising a coil, a permanent magnet and the magnetic latching relay drive circuit according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921416648.1U CN210607112U (en) | 2019-08-26 | 2019-08-26 | Magnetic latching relay drive circuit and magnetic latching relay with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921416648.1U CN210607112U (en) | 2019-08-26 | 2019-08-26 | Magnetic latching relay drive circuit and magnetic latching relay with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210607112U true CN210607112U (en) | 2020-05-22 |
Family
ID=70686542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921416648.1U Active CN210607112U (en) | 2019-08-26 | 2019-08-26 | Magnetic latching relay drive circuit and magnetic latching relay with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210607112U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN117637392A (en) * | 2024-01-26 | 2024-03-01 | 深圳市德兰明海新能源股份有限公司 | Electromagnetic relay driving circuit and electronic apparatus |
-
2019
- 2019-08-26 CN CN201921416648.1U patent/CN210607112U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN117637392A (en) * | 2024-01-26 | 2024-03-01 | 深圳市德兰明海新能源股份有限公司 | Electromagnetic relay driving circuit and electronic apparatus |
| CN117637392B (en) * | 2024-01-26 | 2024-04-19 | 深圳市德兰明海新能源股份有限公司 | Electromagnetic relay driving circuit and electronic apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210607112U (en) | Magnetic latching relay drive circuit and magnetic latching relay with same | |
| CN109494120B (en) | Relay control circuit | |
| CN110912386A (en) | Active discharge circuit | |
| CN105981128A (en) | Latching-relay drive circuit | |
| CN107579695B (en) | Energy feedback protection circuit and motor control system | |
| CN110996027B (en) | Standby circuit, method and television | |
| KR101339350B1 (en) | Insulation type switching power supply | |
| CN208922992U (en) | A kind of control relay circuit | |
| CN213846644U (en) | Power supply circuit and switching device | |
| CN102576626B (en) | Heat-generation inhibiting circuit for exciting coil in relay | |
| CN112398464A (en) | Power supply circuit and switching device | |
| CN102723238B (en) | Relay drive circuit and control method and system thereof | |
| CN110768518A (en) | Power isolation circuit and intelligent door lock system | |
| CN212113569U (en) | Relay drive circuit and electromagnetic heating equipment | |
| CN211654701U (en) | Relay drive circuit and electromagnetic heating equipment | |
| CN114759628A (en) | Power-on protection circuit and electronic equipment | |
| CN211266459U (en) | Protection circuit and switching device control circuit | |
| CN203674080U (en) | Relay drive circuit | |
| CN220553391U (en) | Switch module for contactor and contactor module | |
| CN115325250B (en) | Solenoid valve drive circuit and solenoid valve drive system | |
| CN216871854U (en) | Voltage reduction holding control circuit | |
| CN217445049U (en) | Power-on protection circuit and electronic equipment | |
| CN212258390U (en) | Input protection circuit and device | |
| CN113012983B (en) | Control device and method for contactor | |
| CN217882848U (en) | High-power anti-interference direct current relay circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |