CN211929395U - Novel wide-range voltage drive relay circuit - Google Patents
Novel wide-range voltage drive relay circuit Download PDFInfo
- Publication number
- CN211929395U CN211929395U CN202020637334.0U CN202020637334U CN211929395U CN 211929395 U CN211929395 U CN 211929395U CN 202020637334 U CN202020637334 U CN 202020637334U CN 211929395 U CN211929395 U CN 211929395U
- Authority
- CN
- China
- Prior art keywords
- relay
- voltage
- positive
- triode
- 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 provides a novel wide range voltage drive relay circuit, including positive voltage stabiliser U1, resistance R1, relay U2 and triode Q1, the input of positive voltage stabiliser U1 connects in input voltage VIN, the output termination of positive voltage stabiliser U1 is in the one end of resistance R1, and the other termination of resistance R2 is in positive voltage stabiliser U1's adjustable voltage end, the other end of resistance R2 still connects in relay U2's negative pole end, relay U2's positive pole termination is in triode Q1's collecting electrode, triode Q1's projecting pole ground connection, triode Q1's base connect in signal input end O1, relay U2 first output OUT1-1 and second output OUT1-2 connect in the controlled circuit. The utility model discloses according to relay during operation driving voltage and operating current, adjust through the resistance of configuration resistance, and do not receive input voltage VIN's influence.
Description
Technical Field
The utility model belongs to the technical field of the relay technique and specifically relates to a novel wide range voltage drive relay circuit is related to.
Background
A relay is an electric control device that generates a predetermined step change in a controlled amount in an electric output circuit when a change in an input amount meets a predetermined requirement. It has an interactive relationship between the control system and the controlled system. It is commonly used in automated control circuits, which are actually a "recloser" that uses low current to control high current operation. The relay is an automatic switch element with an isolation function, is widely applied to remote control, remote measurement, communication, automatic control, electromechanical integration and power electronic equipment, and is one of the most important control elements. Relays generally have an induction mechanism capable of reflecting a certain input variable; the control system is provided with an actuating mechanism which can realize on and off control on a controlled circuit; between the input and output parts of the relay, there are also intermediate mechanisms for coupling and isolating the input quantity, functional processing and driving the output part. Therefore, the circuit plays the roles of automatic regulation, safety protection, circuit conversion and the like. The relay has fixed driving voltage or the driving voltage range is narrow, and the relay cannot be directly used in an industrial field with large voltage fluctuation.
SUMMERY OF THE UTILITY MODEL
The utility model provides a relay have fixed driving voltage or driving voltage scope narrow, can not directly be used for the great industrial field's of voltage fluctuation problem, provided a novel wide range voltage drive relay circuit, according to relay during operation driving voltage and operating current, adjusted through the resistance of configuration resistance, and do not receive input voltage VIN's influence.
In order to achieve the above object, the present invention provides the following technical solutions:
a novel wide-range voltage drive relay circuit comprises a positive voltage stabilizer U1, a resistor R1, a relay U2 and a triode Q1, wherein the input end of the positive voltage stabilizer U1 is connected with an input voltage VIN, the output end of the positive voltage stabilizer U1 is connected with one end of a resistor R1, the other end of the resistor R1 is connected with an adjustable voltage end of the positive voltage stabilizer U1, the other end of the resistor R1 is further connected with the negative end of the relay U2, the positive end of the relay U2 is connected with the collector of the triode Q1, the emitter of the triode Q1 is grounded, the base of the triode Q1 is connected with a signal input end O1, and the first output end OUT1-1 and the second output end OUT1-2 of the relay U2 are connected with a controlled circuit.
The voltage of the input voltage VIN in an industrial field is large and large in fluctuation, stable voltage is regulated and output through the positive voltage regulator U1, the output voltage range of the positive voltage regulator U1 is 1.25-37VDC, the difference value of the maximum input voltage and the maximum output voltage is 40VDC, the voltage regulation range is wide, the two ends of the resistor R1 are made to be constant voltage 1.25V, the resistance value of the resistor R1 is configured according to the driving voltage and the working current of the relay during working, the two ends of the relay are made to have fixed driving voltage, and therefore the purpose of driving the relay through wide-range voltage is achieved.
Preferably, a diode D1 is connected in parallel with the relay U2 in the reverse direction, the cathode of the diode D1 is connected to the negative terminal of the relay U2, and the anode of the diode D1 is connected to the positive terminal of the relay U2. Diode D1 acts to absorb the self-induced voltage of the relay coil when driving transistor Q1 to turn off. When the current on the inductor is reduced, a self-inductance voltage can be generated, the direction of the voltage is that the positive end of the relay U2 is negative, the collector is positive, the triode can be broken down by the voltage, and therefore the diode D1 is connected in parallel on the relay to absorb the self-inductance voltage, and the protection effect is achieved.
Preferably, a resistor R2 is connected between the emitter and the base of the triode Q1.
Preferably, a resistor R3 is connected between the base of the transistor Q1 and the signal input end O1.
Preferably, the signal input terminal O1 inputs a high level or a low level.
Preferably, the positive voltage regulator U1 is an adjustable 3-terminal positive voltage regulator, with model number LM 317. LM317 is one of the most widely used power supply integrated circuits, and not only has the simplest form of a fixed three-terminal voltage stabilizing circuit, but also has the characteristic of adjustable output voltage. In addition, the voltage regulating circuit has the advantages of wide voltage regulating range, good voltage regulating performance, low noise, high ripple rejection ratio and the like. LM317 is an adjustable 3-terminal positive voltage regulator capable of providing more than 1.5 amps at output voltages ranging from 1.2 volts to 37 volts, which is very easy to use. The device can also be used to make programmable output regulators or, by connecting a fixed resistor between the regulator and the output, LM317 can be used as a precision current regulator, which is the feature used by the present circuit.
Preferably, the positive voltage regulator U1 outputs a voltage in the range of 1.25-37 VDC.
The utility model discloses there is following beneficial effect: the positive voltage stabilizer U1 regulates and outputs stable voltage, so that the relay has variable driving voltage, the driving voltage range is widened, and the use range of the relay is wide; a diode D1 is provided to absorb the self-induced voltage of the relay coil when the drive transistor Q1 is turned off, and to protect the transistor Q1.
Drawings
Fig. 1 is a circuit diagram of the present embodiment.
Detailed Description
Example (b):
the embodiment provides a novel wide-range voltage drive relay circuit, refer to fig. 1, including positive voltage regulator U1, resistor R1, relay U2 and triode Q1, the input end of positive voltage regulator U1 is connected to input voltage VIN, the output end of positive voltage regulator U1 is connected to one end of resistor R1, the other end of resistor R1 is connected to the adjustable voltage end of positive voltage regulator U1, the other end of resistor R1 is also connected to the negative pole end of relay U2, the positive pole end of relay U2 is connected to the collector of triode Q1, the emitter of triode Q1 is grounded, the base of triode Q1 is connected to signal input terminal O1, and first output terminal OUT1-1 and second output terminal OUT1-2 of relay U2 are connected to the controlled circuit. The relay U2 is reversely connected with a diode D1 in parallel, the cathode of the diode D1 is connected with the cathode end of the relay U2, the anode of the diode D1 is connected with the anode end of the relay U2, a resistor R2 is connected between the emitter and the base of the triode Q1, a resistor R3 is connected between the base of the triode Q1 and the signal input end O1, and the signal input end O1 inputs high level or low level.
When the signal input end O1 inputs a high level, the triode Q1 is conducted, a driving voltage is arranged between the positive pole end and the negative pole end of the relay, the relay is attracted, and the relay is switched on by the control circuit switch. When the signal input end O1 inputs a low level, the triode Q1 is cut off, no driving voltage exists between the positive electrode end and the negative electrode end of the relay, and the relay is disconnected and is switched off by the control circuit switch.
The positive voltage regulator U1 is an adjustable 3-terminal positive voltage regulator, model LM 317. The positive voltage regulator U1 outputs a voltage in the range of 1.25-37 VDC. LM317 is one of the most widely used power supply integrated circuits, and not only has the simplest form of a fixed three-terminal voltage stabilizing circuit, but also has the characteristic of adjustable output voltage. In addition, the voltage regulating circuit has the advantages of wide voltage regulating range, good voltage regulating performance, low noise, high ripple rejection ratio and the like. LM317 is an adjustable 3-terminal positive voltage regulator capable of providing more than 1.5 amps at output voltages ranging from 1.2 volts to 37 volts, which is very easy to use. The device can also be used to make programmable output regulators or, by connecting a fixed resistor between the regulator and the output, LM317 can be used as a precision current regulator, which is the feature used by the present circuit.
The voltage of the input voltage VIN in an industrial field is large and large in fluctuation, stable voltage is regulated and output through the positive voltage regulator U1, the output voltage range of the positive voltage regulator U1 is 1.25-37VDC, the difference value of the maximum input voltage and the maximum output voltage is 40VDC, the voltage regulation range is wide, the two ends of the resistor R1 are made to be constant voltage 1.25V, the resistance value of the resistor R1 is configured according to the driving voltage and the working current of the relay during working, the two ends of the relay are made to have fixed driving voltage, and therefore the purpose of driving the relay through wide-range voltage is achieved.
Diode D1 acts to absorb the self-induced voltage of the relay coil when driving transistor Q1 to turn off. When the current on the inductor is reduced, a self-inductance voltage can be generated, the direction of the voltage is that the positive end of the relay U2 is negative, the collector is positive, the triode can be broken down by the voltage, and therefore the diode D1 is connected in parallel on the relay to absorb the self-inductance voltage, and the protection effect is achieved.
The utility model discloses there is following beneficial effect: the positive voltage stabilizer U1 regulates and outputs stable voltage, so that the relay has variable driving voltage, the driving voltage range is widened, and the use range of the relay is wide; a diode D1 is provided to absorb the self-induced voltage of the relay coil when the drive transistor Q1 is turned off, and to protect the transistor Q1.
Claims (7)
1. A novel wide-range voltage drive relay circuit is characterized by comprising a positive voltage stabilizer U1, a resistor R1, a relay U2 and a triode Q1, wherein the input end of the positive voltage stabilizer U1 is connected with an input voltage VIN, the output end of the positive voltage stabilizer U1 is connected with one end of a resistor R1, the other end of the resistor R1 is connected with an adjustable voltage end of the positive voltage stabilizer U1, the other end of the resistor R1 is further connected with the negative electrode end of the relay U2, the positive electrode of the relay U2 is connected with the collector electrode of the triode Q1, the emitter electrode of the triode Q1 is grounded, the base electrode of the triode Q1 is connected with a signal input end O1, and a first output end OUT1-1 and a second output end OUT1-2 of the relay U2 are connected.
2. The novel wide-range voltage driven relay circuit as claimed in claim 1, wherein the relay U2 is reversely connected in parallel with a diode D1, the cathode of the diode D1 is connected to the negative terminal of the relay U2, and the anode of the diode D1 is connected to the positive terminal of the relay U2.
3. The novel wide-range voltage driven relay circuit as claimed in claim 1, wherein a resistor R2 is connected between the emitter and the base of said transistor Q1.
4. The novel wide-range voltage driven relay circuit as claimed in claim 3, wherein a resistor R3 is connected between the base of said transistor Q1 and the signal input end O1.
5. The novel wide-range voltage driven relay circuit as claimed in claim 1, wherein said signal input terminal O1 inputs high level or low level.
6. The novel wide range voltage driven relay circuit as claimed in any one of claims 1 to 5, wherein said positive voltage regulator U1 is a 3-terminal adjustable positive voltage regulator, model LM 317.
7. The novel wide range voltage driven relay circuit of claim 6, wherein said positive voltage regulator U1 outputs a voltage range of 1.25-37 VDC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020637334.0U CN211929395U (en) | 2020-04-24 | 2020-04-24 | Novel wide-range voltage drive relay circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020637334.0U CN211929395U (en) | 2020-04-24 | 2020-04-24 | Novel wide-range voltage drive relay circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211929395U true CN211929395U (en) | 2020-11-13 |
Family
ID=73328177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020637334.0U Active CN211929395U (en) | 2020-04-24 | 2020-04-24 | Novel wide-range voltage drive relay circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211929395U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112838764A (en) * | 2021-02-26 | 2021-05-25 | 西安微电子技术研究所 | Power supply level conversion circuit and method |
-
2020
- 2020-04-24 CN CN202020637334.0U patent/CN211929395U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112838764A (en) * | 2021-02-26 | 2021-05-25 | 西安微电子技术研究所 | Power supply level conversion circuit and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205453114U (en) | Power supply surge inhibitor with prevent joining conversely function | |
| EP3484035A1 (en) | Hysteresis power supply circuit | |
| CN108882450B (en) | Limiting circuit for highest output power of constant-current LED power supply and constant-current LED power supply circuit | |
| CN103280765A (en) | Overvoltage protection circuit | |
| US9634570B2 (en) | Multi-mode power converter and associated control method | |
| CN112363561B (en) | Linear voltage regulator and soft start method thereof | |
| CN211929395U (en) | Novel wide-range voltage drive relay circuit | |
| CN112769093A (en) | Current-limiting control circuit, chip and power supply | |
| CN103365332A (en) | Overcurrent protection circuit and power supply device | |
| CN101582628B (en) | High-voltage starting circuit with constant current control | |
| CN102035381B (en) | BOOST circuit with adjusting starting voltage | |
| CN106711935B (en) | Overvoltage protection circuit and load voltage regulating circuit | |
| CN103049033A (en) | Constant current source circuit and sampling circuit | |
| CN112684841B (en) | Low dropout regulator with high power supply rejection ratio | |
| CN210605505U (en) | DC voltage stabilizing circuit, power circuit and intelligent circuit breaker controller | |
| CN112134457B (en) | Constant current source circuit for realizing PWM (pulse width modulation) based on operational amplifier | |
| EP3279916B1 (en) | Relay drive circuit | |
| CN216436804U (en) | Overvoltage protection circuit, device, system and electronic equipment | |
| CN217590242U (en) | Output overvoltage protection circuit structure | |
| CN218788757U (en) | Variable voltage enabling circuit | |
| CN216210701U (en) | Output control system for programmable power supply | |
| CN219227421U (en) | Starting circuit of auxiliary power supply applied to high-frequency switching power supply | |
| CN211453897U (en) | Simple tool for adjusting output voltage of power panel | |
| CN112068629B (en) | Voltage-stabilized power supply circuit and solar charging controller | |
| CN210958153U (en) | Novel passive current-sharing line |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |