CN210866052U - Relay switching circuit with higher speed - Google Patents
Relay switching circuit with higher speed Download PDFInfo
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- CN210866052U CN210866052U CN201922224481.5U CN201922224481U CN210866052U CN 210866052 U CN210866052 U CN 210866052U CN 201922224481 U CN201922224481 U CN 201922224481U CN 210866052 U CN210866052 U CN 210866052U
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Abstract
The utility model discloses a relay switching circuit with higher speed, including power V1, diode D1, diode D2, diode D3, electric capacity C1, resistance R5, relay K1, triode Q1, triode Q3 and IO mouth extension chip U1; when the IO port expansion chip U1 inputs a low level, the moment is set as t0, the triodes Q1 and Q3 are cut off, the relay K1 driving winding does not have a loop, the voltage at two ends of the relay K1 driving winding is equal in potential, and the relay does not act at the moment; when the IO port expansion chip U1 inputs a high level, the moment is set as t1, the triode Q1 is firstly conducted, the triode Q3 is changed from a cut-off state to a conducting state, the voltage of a driving winding of the relay K1 is increased, a magnetic field is increased, the action of an armature is accelerated, and the relay K1 is quickly conducted; the utility model discloses simple structure, it is with low costs, it is fast to open.
Description
Technical Field
The utility model relates to a relay field, concretely relates to relay switching circuit with higher speed.
Background
Most of the relays currently used in control circuits are electromagnetic relays (as shown in fig. 1 and 2). The electromagnetic relay has the characteristics of simple structure, low price, convenient use and maintenance, small volume, rapid and accurate action, sensitive and reliable control and the like; the electromagnetic relay works by utilizing the suction action generated by current in an input circuit between an electromagnet iron core and an armature, and particularly, the electromagnetic relay works by applying certain voltage to two ends of a coil, the coil can generate current so as to generate an electromagnetic effect, and the armature can overcome the tension of a return spring and is sucked to the iron core under the action of electromagnetic force, so that a movable contact of the armature is driven to be sucked with a fixed contact (normally open contact). Thereby achieving the purpose of conduction in the circuit.
Chinese patent (CN202633172U) discloses a switching circuit of a relay, which is formed by connecting a timer NE, a time relay KT, a diode D, a triode Q, a switch S, two capacitors C1-C2 and four resistors R1-R4: the port 1 of the timer NE is connected with a resistor R4 in series and then is connected with the base electrode of the triode Q, the collector electrode of the triode Q is connected with a time relay KT in series and then is connected with a voltage output end Vout, the two ends of the time relay KT are connected with a diode D in series, and the emitter electrode of the triode Q is directly grounded; the No. 2 port of the timer NE is connected with a voltage output end Vout, and the voltage output end Vout is also connected with a grounding capacitor C2; a resistor R2 is connected in parallel between the port No. 2 and the port No. 3 of the timer NE; the number port of the timer NE is connected with the switch S and the resistor R1 in series in sequence and then is connected with the number 1 port, one end of the switch S, which is connected with the resistor R1, is also connected with a grounding capacitor C1, and the number 3 port is also connected with a grounding resistor R3; the port No. 4 of the timer NE is directly connected to ground.
The existing relay driving circuit mostly adopts a constant voltage driving method, the constant voltage driving method is simple in driving circuit, but the turn-on time is determined by the performance of the relay, and the effect of accelerating the turn-on of the relay is difficult to realize by the method.
Although the switching function of the relay can be realized in the prior art, the requirement on the switching time in a harsher application occasion is reduced as much as possible, and the relay switching method is obviously not suitable.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art not enough, provide a control simply, open fast relay switching circuit with higher speed.
In order to realize the purpose of the utility model, the utility model discloses a technical scheme realize as follows: a relay acceleration switching circuit comprises a power supply V1, a diode D1, a voltage stabilizing diode D2, a diode D3, a capacitor C1, a resistor R5, a relay K1, a triode Q1, a triode Q3 and an IO port expansion chip U1;
the anode of the diode D1 is connected with the anode of the power supply V1, the emitter of the triode Q3 is connected with the anode of the power supply V1, the base of the triode Q3 is connected with the collector of the triode Q1 through a resistor R2, and the collector of the triode Q3 is connected with the cathode of the power supply V1 through a resistor R5;
the positive terminal of the capacitor C1 is connected with the negative terminal of the diode D1, and the negative terminal of the capacitor C1 is connected with the ground through a resistor R5; an emitter of the triode Q1 is connected with a negative electrode of a power supply V1, and a base electrode of the triode Q1 is connected with an IO port expansion chip U1 through a resistor R4; the anode and the cathode of the voltage-stabilizing diode D2 are respectively connected to the emitter and the collector of the triode Q1, the collector of the triode Q3 and the base through a resistor R2; the cathode of the diode D3 is connected with the cathode of the diode D1; the anode of the diode D3 is connected with the common point of the collector of the triode Q1, the base of the triode Q3 and the cathode of the voltage-stabilizing diode D2 through the other end of the resistor R2; the upper end and the lower end of a driving winding of the relay K1 are connected with the negative electrode and the positive electrode of the diode D3 in parallel;
when the IO port expansion chip U1 inputs a low level, the moment is set as t0, the triodes Q1 and Q3 are cut off, the relay K1 driving winding does not have a loop, the relay K1 drives the voltage at the two ends of the winding to be equal in potential, and the relay K1 does not act at the moment;
when the IO port expansion chip U1 inputs a high level, the moment is set as a moment t1, the triode Q1 is firstly conducted, so that the voltage of the base electrode of the triode Q3 is a low level, the triode Q3 is changed from a cut-off state to a conducting state, the voltage of two ends of a relay K1 driving winding is changed from 0 to 2 times of the voltage of a power supply V1, the voltage of two ends of the relay K1 driving winding is increased to increase a magnetic field, so that the armature action is accelerated, and the relay K1 is quickly turned on; then the voltage at the two ends of the capacitor C1 is discharged through a relay K1 winding, and the steady-state operation is maintained after the discharge is completed.
Preferably, when the IO port expansion chip U1 inputs a low level, the transistors Q1 and Q3 are turned off, the power supply V1 charges the capacitor C1 through the diode D1, the capacitor C1 and the resistor R5, the relay K1 drives the winding voltage to be equal to the voltage at the positive terminal of the capacitor C1, that is, the voltage of the power supply V1-the forward conduction voltage drop of the diode D1, the negative terminal of the capacitor C1 is connected to the ground through the resistor R5, and at this time, the voltage across the capacitor C1 is equal to the voltage at the both ends of the power supply V1-the forward conduction voltage drop of the diode D1-the voltage U36 5R5。
Preferably, when the IO port expansion chip U1 inputs a high level, the transistor Q1 is turned on first, so that the base voltage of the transistor Q3 is low, the transistor Q3 is turned from the off state to the on state, and the voltage of the negative terminal of the capacitor C1 is changed from U to the negative terminal of the capacitor C1R5Becomes the voltage of a power supply V1-the voltage drop of a triode Q3; according to the principle that the voltage at two ends of the capacitor cannot change suddenly, the voltage at the positive end of the capacitor C1 is equal to the voltage of a power supply V1, the voltage of a triode Q3, the voltage of a power supply V1, the forward conduction voltage drop-U of a diode D1R5Voltage of 2V 1 supply, voltage drop of transistor Q3, forward conduction voltage drop of diode D1, UR5Relay K1 changes the voltage across the drive winding from 0 to approximately 2 times the supply V1 voltage.
Preferably, the relay K1 is model EDR201A 05.
Preferably, the transistor Q1 is an NPN-type transistor, and the transistor Q1 is 2N 2222A.
Preferably, the transistor Q3 is a PNP transistor, and the transistor Q3 is MMBT2907AM3T 5G.
Preferably, the resistance values of the resistor R5 and the resistor R2 are both 5.1k omega.
Preferably, the resistance value of the resistor R4 is 2k Ω.
Preferably, the capacitance value of the capacitor C1 is 47 muF.
Preferably, the diode D1 and the diode D3 are 1N4148, and the diode D2 is 1N5363 BRLG.
Advantageous effects
Compared with the prior art, the utility model discloses the beneficial effect who gains does:
1. when the relay is switched on, the voltage about 2 times of the steady-state operation voltage is adopted, so that the switching-on speed of the relay is greatly improved;
2. the input control of the circuit only needs a common IO port mode (high/low level), does not occupy CPU interrupt resources, and saves the complexity of the whole circuit design;
3. the utility model discloses circuit structure is simple, and control is simple, and is with low costs, and portability is strong, sees to the performance of relay extremely from opening speed.
Drawings
FIG. 1 is a circuit diagram of a conventional general relay switching control circuit;
FIG. 2 is a timing diagram and waveform diagram of a conventional relay;
fig. 3 is a circuit diagram of an acceleration switching circuit of a relay according to the present invention.
Fig. 4 is a timing diagram and a waveform diagram of voltages at two ends of a relay of the relay acceleration switching circuit according to the present invention;
Detailed Description
The following describes the present invention with reference to the accompanying drawings.
As shown in fig. 3 and 4, the relay acceleration switching circuit includes a power supply V1, a diode D1, a zener diode D2, a diode D3, a capacitor C1, a resistor R5, a relay K1, a transistor Q1, a transistor Q3, and an IO port expansion chip U1;
the anode of the diode D1 is connected with the anode of the power supply V1;
the triode Q3 is a PNP type triode, and the model of the triode Q3 is MMBT2907AM3T 5G. The emitter of the triode Q3 is connected with the positive pole of the power supply V1, the base of the triode Q3 is connected with the collector of the triode Q1 through the resistor R2, the effect of hindering and reducing the base current of the triode Q3 can be achieved by connecting the resistor R2 in series with the base of the triode Q1, the base current of the triode Q3 is enabled to work within an allowable range, and the reliable stability of the work of the triode Q3 and the circuit is ensured.
The collector of the triode Q3 is connected with the negative electrode of the power supply V1 through a resistor R5; the positive end of the capacitor C1 is connected with the negative electrode of the diode D1, and the negative end of the capacitor C1 is connected with the negative electrode of the power supply V1 through R5; the resistance values of the resistor R5 and the resistor R2 are both 5.1k omega; the capacitance value of the capacitor C1 is 47 muF.
The triode Q1 is an NPN type triode, and the model of the triode Q1 is 2N 2222A. An emitter of the triode Q1 is connected with a negative electrode of a power supply V1, and a base electrode of the triode Q1 is connected with an IO port expansion chip U1 through a resistor R4; the resistance value of the resistor R4 is 2k omega. The resistor R4 is connected in series with the base of the transistor Q1, so that the base current of the transistor Q1 can be prevented from being reduced, the base current of the transistor Q1 can work within an allowable range, and the reliable stability of the operation of the transistor Q1 and a circuit is ensured.
A resistor R3 is connected in parallel between the base electrode and the emitter electrode of the triode Q1, and the resistance value of the resistor R3 is 2k omega; when no input voltage exists or the input end is suspended, a resistor R3 is connected between the base electrode and the emitter electrode of the transistor Q1 in parallel, and therefore reliable cut-off of the transistor Q1 is guaranteed.
The model of the diode D2 is 1N5363BRLG, and the anode and the cathode of the voltage stabilizing diode D2 are respectively connected to the emitter and the collector of the triode Q1 and the collector of the triode Q3 and reach the base electrode through the resistor R2; the cathode of the diode D3 is connected with the cathode of the diode D1; the anode of the diode D3 is connected to the common point of the collector of the transistor Q1, the base of the transistor Q3 through the other end of the resistor R2 and the cathode of the voltage-stabilizing diode D2.
When the IO port expansion chip U1 inputs a low level, setting this time as a time t0, the transistors Q1 and Q3 are turned off, the relay K1 driving winding does not have a loop, the power supply V1 charges the capacitor C1 through a loop of the diode D1, the capacitor C1 and the resistor R5, the relay K1 driving winding voltage is equal to the voltage of the positive terminal of the capacitor C1, that is, the voltage of the power supply V1 minus the forward conduction voltage drop of the diode D1, the negative terminal of the capacitor C1 is connected to the ground through the resistor R5, and at this time, the voltage drop across the capacitor C1 is equal to the voltage of the power supply V1-the voltage of the forward conduction voltage drop of the diode D1-the voltage U5 of theR5The voltage at the two ends of the driving winding of the relay K1 is equal to the potential, and the relay does not act at the moment;
when the IO port expansion chip U1 inputs a high level, the time is set to be t1, the Q1 is turned on first, so that the base voltage of the Q3 is low, the transistor Q3 is turned on from an off state, and the capacitorThe negative terminal voltage of C1 is controlled by UR5Becomes the voltage of a power supply V1-the voltage drop of a triode Q3; according to the principle that the voltage at two ends of the capacitor cannot change suddenly, the voltage at the positive end of the capacitor C1 is equal to the voltage of a power supply V1, the voltage of a triode Q3, the voltage of a power supply V1, the forward conduction voltage drop-U of a diode D1R5Voltage of 2V 1 supply, voltage drop of transistor Q3, forward conduction voltage drop of diode D1, UR5The voltage at the two ends of the driving winding of the relay K1 is changed from 0 to V1 which is close to 2 times, the voltage at the two ends of the driving winding of the relay K1 is increased to increase a magnetic field, so that the action of the armature is accelerated, and the relay K1 is quickly switched on; then the voltage at the two ends of the capacitor C1 is discharged through a relay K1 winding, and the steady-state operation is maintained after the discharge is completed.
The type of the relay K1 is EDR201A05, the upper end and the lower end of a driving winding of the relay K1 are connected with the negative pole and the positive pole of a diode D3 in parallel; the diode D3 plays a role in protection and prevents sudden change of current; the relay K1 will produce the induced electromotive force, the direction of the induced electromotive force is opposite to the direction of the voltage applied to its two ends, when the relay K1 is cut off suddenly, the induced electromotive force is still, because the induced electromotive force is opposite to the original voltage direction, when the power is not cut off, the original voltage is offset with it, there is no voltage offset with the induced electromotive force after the power is cut off, this induced electromotive force will probably cause the damage of the components in the circuit, through connecting diode D3 in parallel, make diode D3 and relay K1 form a closed loop, the current direction in the loop just right turns on with diode D3, can release the current of the induced electromotive force, form the protection to the circuit.
The type of the diode D1 and the type of the diode D3 are 1N 4148; 1N4148 is a small high-speed switching diode which is fast to switch and widely used for unidirectional conduction and isolation of circuits with high signal frequency, communication, computer boards, television circuits and industrial control circuits. The utility model discloses a diode D1 and diode D3 adopt 1N4148 diode, help improving the switching-on speed and the release protection of relay.
The utility model discloses an element be common use component, and is better to the accuse of cost.
The utility model has the advantages of it is following:
1. when the relay is switched on, the voltage is about 2 times of the steady-state operation voltage, the magnetic field is increased, the armature action is accelerated, and the switching-on speed of the relay is greatly improved;
2. the input control of the circuit only needs a common IO port mode (high/low level), does not occupy CPU interrupt resources, and saves the complexity of the whole circuit design;
3. the utility model discloses circuit structure is simple, and control is simple, and is with low costs, and portability is strong, sees to the performance of relay extremely from opening speed.
The above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims; variations and modifications to the above-described embodiments may occur to those skilled in the art, in light of the above teachings and teachings. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should fall within the protection scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (10)
1. A relay acceleration switching circuit is characterized in that: the device comprises a power supply V1, a diode D1, a voltage stabilizing diode D2, a diode D3, a capacitor C1, a resistor R5, a relay K1, a triode Q1, a triode Q3 and an IO port expansion chip U1;
the anode of the diode D1 is connected with the anode of the power supply V1, the emitter of the triode Q3 is connected with the anode of the power supply V1, the base of the triode Q3 is connected with the collector of the triode Q1 through a resistor R2, and the collector of the triode Q3 is connected with the cathode of the power supply V1 through a resistor R5;
the positive terminal of the capacitor C1 is connected with the negative terminal of the diode D1, and the negative terminal of the capacitor C1 is connected with the ground through a resistor R5; an emitter of the triode Q1 is connected with a negative electrode of a power supply V1, and a base electrode of the triode Q1 is connected with an IO port expansion chip U1 through a resistor R4; the anode and the cathode of the voltage-stabilizing diode D2 are respectively connected to the emitter and the collector of the triode Q1, the collector of the triode Q3 and the base through a resistor R2; the cathode of the diode D3 is connected with the cathode of the diode D1; the anode of the diode D3 is connected with the common point of the collector of the triode Q1, the base of the triode Q3 and the cathode of the voltage-stabilizing diode D2 through the other end of the resistor R2; the upper end and the lower end of a driving winding of the relay K1 are connected with the negative electrode and the positive electrode of the diode D3 in parallel;
when the IO port expansion chip U1 inputs a low level, the moment is set as t0, the triodes Q1 and Q3 are cut off, the relay K1 driving winding does not have a loop, the relay K1 drives the voltage at the two ends of the winding to be equal in potential, and the relay K1 does not act at the moment;
when the IO port expansion chip U1 inputs a high level, the moment is set as a moment t1, the triode Q1 is firstly conducted, so that the voltage of the base electrode of the triode Q3 is a low level, the triode Q3 is changed from a cut-off state to a conducting state, the voltage of two ends of a relay K1 driving winding is changed from 0 to 2 times of the voltage of a power supply V1, the voltage of two ends of the relay K1 driving winding is increased to increase a magnetic field, so that the armature action is accelerated, and the relay K1 is quickly turned on; then the voltage at the two ends of the capacitor C1 is discharged through a relay K1 winding, and the steady-state operation is maintained after the discharge is completed.
2. The relay acceleration switching circuit according to claim 1, characterized in that: when the IO port expansion chip U1 inputs a low level, the triodes Q1 and Q3 are turned off, the power supply V1 charges the capacitor C1 through the loop of the diode D1, the capacitor C1 and the resistor R5, the relay K1 drives the winding voltage to be equal to the voltage at the positive terminal of the capacitor C1, namely the voltage of the power supply V1-the forward conduction voltage drop of the diode D1, the negative terminal of the capacitor C1 is connected to the ground through the resistor R5, and at this time, the voltage drop at both ends of the capacitor C1 is equal to the voltage at both ends of the power supply V1-the forward conduction voltage drop of the diode D1-the voltage U36 5R5。
3. The relay acceleration switching circuit according to claim 2, characterized in that: when the IO port expansion chip U1 inputs a high level, the triode Q1 leads toSo that the base voltage of the transistor Q3 is at low level, the transistor Q3 is turned from off state to on state, and the voltage at the negative terminal of the capacitor C1 is changed from UR5Becomes the voltage of a power supply V1-the voltage drop of a triode Q3; according to the principle that the voltage at two ends of the capacitor cannot change suddenly, the voltage at the positive end of the capacitor C1 is equal to the voltage of a power supply V1, the voltage of a triode Q3, the voltage of a power supply V1, the forward conduction voltage drop-U of a diode D1R5Voltage of 2V 1 supply, voltage drop of transistor Q3, forward conduction voltage drop of diode D1, UR5Relay K1 changes the voltage across the drive winding from 0 to approximately 2 times the supply V1 voltage.
4. The relay acceleration switching circuit according to claim 1, characterized in that: the type of the relay K1 is EDR201A 05.
5. The relay acceleration switching circuit according to claim 1, characterized in that: the triode Q1 is an NPN type triode, and the model of the triode Q1 is 2N 2222A.
6. The relay acceleration switching circuit according to claim 1, characterized in that: the triode Q3 is a PNP type triode, and the model of the triode Q3 is MMBT2907AM3T 5G.
7. The relay acceleration switching circuit according to claim 1, characterized in that: the resistance values of the resistor R5 and the resistor R2 are 5.1k omega.
8. The relay acceleration switching circuit according to claim 1, wherein the resistance R4 is 2k Ω.
9. The relay acceleration switching circuit according to claim 1, wherein the capacitance value of the capacitor C1 is 47 μ F.
10. The relay acceleration switching circuit according to claim 1, characterized in that the type of the diode D1 and the diode D3 is 1N4148, and the type of the zener diode D2 is 1N5363 BRLG.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922224481.5U CN210866052U (en) | 2019-12-12 | 2019-12-12 | Relay switching circuit with higher speed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922224481.5U CN210866052U (en) | 2019-12-12 | 2019-12-12 | Relay switching circuit with higher speed |
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| Publication Number | Publication Date |
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| CN210866052U true CN210866052U (en) | 2020-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922224481.5U Active CN210866052U (en) | 2019-12-12 | 2019-12-12 | Relay switching circuit with higher speed |
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| CN (1) | CN210866052U (en) |
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Effective date of registration: 20230630 Address after: Room 201, Building A, No. 1, Qianwan Road, Qianhai-Shenzhen-Hong Kong Cooperation Zone, Shenzhen, Guangdong Province, 518000 Patentee after: Shenzhen panstar Technology Co.,Ltd. Address before: Room 102A, Building A, Huahan Innovation Park, No. 16 Langshan Road, North District, Yuehai Street, Nanshan District, Shenzhen City, Guangdong Province, 518054 Patentee before: Shenzhen fanshida Power Electronics Technology Co.,Ltd. |