CN217469748U - Driving circuit capable of changing output power supply polarity - Google Patents
Driving circuit capable of changing output power supply polarity Download PDFInfo
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- CN217469748U CN217469748U CN202122714027.5U CN202122714027U CN217469748U CN 217469748 U CN217469748 U CN 217469748U CN 202122714027 U CN202122714027 U CN 202122714027U CN 217469748 U CN217469748 U CN 217469748U
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Abstract
The utility model relates to a drive circuit of convertible output power polarity, contain the drive circuit of two parallels, be responsible for the power respectively just, the transform control of negative polarity, every circuit is by input binding post, output binding post, the voltage stabilizing chip, input signal pull-up resistance, input signal pull-down resistance, not the gate chip, the AND gate chip, the input triode, optoelectronic isolation chip input current-limiting resistance, the optoelectronic isolation chip, NPN type triode base resistance, PNP type triode base resistance, NPN type triode, PNP type triode, output emitting diode current-limiting resistance connects and forms. The polarity of the output power supply can be changed or the output can be stopped according to the state of the control signal of the input end, and the two circuits have an interlocking function. The polarity of the power supply at the output end is changed by setting the positive input end and the negative input end to be high level, so that the rotation direction of the connected direct current motor is controlled.
Description
Technical Field
The utility model relates to a drive circuit of convertible output power polarity especially relates to a keep apart contactless converting circuit to DC power supply just, negative pole is whole, belongs to the switching circuit field.
Background
In a process control system or an electrical control system, it is often necessary to change the polarity of a dc power supply to control the forward and reverse rotation of a dc motor, and a conventional method is to change the polarity of an output dc power supply by using a relay interlock circuit or a contactor interlock circuit. The method not only has larger volume and is easy to generate inductive electric shock to the control system, but also is easy to damage the contact in the occasion of frequent action due to the adoption of the mechanical contact, thereby greatly shortening the service life of the electric circuit.
Disclosure of Invention
In order to overcome the defects of the current relay or contactor conversion power polarity circuit, the utility model designs a drive circuit capable of converting the polarity of an output power supply. The drive circuit can realize the conversion of the polarity of an external output direct current power supply by a computer output signal, and has the characteristics of strong driving capability, high power, low cost, small volume, no contact, wide working voltage range, low heat generation, strong anti-jamming capability, full isolation of input and output and the like.
The general scheme of the drive circuit capable of converting the polarity of the output power supply comprises the following steps: two parallel circuits are arranged, namely a positive power supply circuit and a reverse power supply circuit, namely two parallel driving circuits, and are used for respectively controlling the positive polarity and the reverse polarity of an output power supply; the positive power supply circuit and the reverse power supply circuit are divided into an input side circuit and an output side circuit; in order to avoid mutual interference of the input side circuit and the output side circuit, a photoelectric isolation chip is arranged between the input side circuit and the output side circuit; in order to avoid short circuit of the power supply at the output end caused by misoperation, the positive power supply circuit and the inverse power supply circuit adopt a NOT gate chip and an AND gate chip to carry out circuit interlocking at the input side circuit, so that the condition that the input side circuits of the positive power supply circuit and the inverse power supply circuit are simultaneously high-level output is avoided, and the short circuit of the output side circuit is avoided.
The utility model discloses a realize that weak current control forceful electric power, output power supply's polarity exchanges and circuit interlocking, the technical scheme who adopts is:
the driving circuit comprises two components and parallel driving circuits with completely same wiring, and is respectively responsible for the control of a positive power supply and a reverse power supply, and each driving circuit comprises an input side circuit and an output side circuit.
As a further scheme of the present invention, the input side circuit is formed by connecting an input connection terminal 1, a voltage stabilization chip 3, an input signal pull-up resistor 4, an input signal pull-down resistor 5, a not gate chip 6, an and gate chip 7, an input triode 8, a photoelectric isolation chip input current limiting resistor 9, and a photoelectric isolation chip 10; the output side circuit is formed by connecting an NPN type triode base resistor 11, a PNP type triode base resistor 12, an NPN type triode 13, a PNP type triode 14, an output light emitting diode 15, an output light emitting diode current limiting resistor 16 and an output wiring terminal 2; wherein, the input wiring terminal 1, the output wiring terminal 2 and the voltage stabilizing chip 3 are shared by two parallel driving circuits.
As a further aspect of the present invention, pin 1, pin 2, pin 3, pin 4 of the input terminal 1 are respectively connected to the positive electrode of the 24V power supply, the signal input ground, the positive rotation control signal "positive" and the negative rotation control signal "negative" of the motor; and a pin 1, a pin 2, a pin 3 and a pin 4 of the output wiring terminal 2 are respectively connected with the anode and the cathode of a 24V power supply, an output 1 and an output end 2, the 24V power supply at the input end is converted into a 5V direct-current power supply through a voltage stabilizing chip 3, and the 5V direct-current power supply is used by input side circuits of two parallel driving circuits.
As a further aspect of the present invention, the input signal "positive" and "negative" are divided by the pull-up resistor 4 and the pull-down resistor 5 of the input signal, and are converted into two signals about 5V, the two signals are respectively connected to the input pin 2 of the nand gate chip 6 of the driving circuit to which the pull-up resistor 4 and the pull-down resistor 5 of the input signal belong and the input pin 1 of the and gate chip 7 of another driving circuit, the output signals of the two nand gate chips 6 are respectively connected to the input pin 2 of the and gate chip 7 of another driving circuit corresponding thereto, and the nand gate chip 6 and the and gate chip 7 are both powered by the voltage stabilizing chip 3.
As a further scheme of the present invention, the output pin 4 of the and gate chip 7 is connected to the base of the input triode 8 of the driving circuit to which it belongs; the emitter of the input triode 8 is connected with the input pin 1 of the photoelectric isolation chip 10 through the photoelectric isolation chip input current limiting resistor 9, and the pin 2 of the photoelectric isolation chip 10 is connected with the input ground.
As a further scheme of the present invention, pin 4 of the optoelectronic isolation chip 10 and the collector of the NPN type triode 13 are connected to the output power supply, and pin 3 of the optoelectronic isolation chip 10 is connected to the base of the NPN type triode 13 and the base of the PNP type triode 14 through the NPN type triode base resistor 11 and the PNP type triode base resistor 12, respectively; an emitting electrode of an NPN type triode 13 of the positive power circuit is connected with an emitting electrode of a PNP type triode 14 of the reverse power circuit and then connected to a pin 3 of an output wiring terminal 2, an emitting electrode of the PNP type triode 14 of the positive power circuit is connected with an emitting electrode of the NPN type triode 13 of the reverse power circuit and then connected to a pin 4 of the output wiring terminal 2, an output light emitting diode 15 and an output light emitting diode current limiting resistor 16 are connected in series and then respectively connected with an emitting electrode of the NPN type triode 13 of the positive power circuit and the negative power circuit and the pin 2 of the output wiring terminal 2, and a pin 1 and a pin 2 of the wiring terminal 2 are respectively connected with a positive electrode and a negative electrode of an output end power supply.
As a further scheme of the present invention, when the input of the "positive" terminal of the input connection terminal 1 is high level and the input of the "negative" terminal is not input, the OUT1 terminal of the output connection terminal 2 is the positive electrode of the power supply and the OUT2 is the ground of the power supply; when the input of the 'inverse' terminal of the input connecting terminal 1 is high level and the 'positive' terminal is not input, the OUT2 terminal of the output connecting terminal 2 is the positive pole of the power supply and the OUT1 is the ground of the power supply; when the inputs of the positive terminal and the negative terminal of the input wiring terminal 1 are both high level or low level, the output side circuit has no output.
The utility model has the advantages that:
1. the drive circuit capable of converting the polarity of the output power supply has wide application and can be directly matched with control equipment such as a singlechip, a PLC, a DCS, a control instrument and the like for use;
2. the direct forward and reverse rotation control of the peripheral direct current motor by the control equipment can be realized in a matched manner.
3. The interlocking function of positive and negative power supplies of the output end is realized on hardware, so that the power supply short circuit caused by the error of the control equipment is avoided.
4. The full-isolation circuit has the full-isolation function of an input side circuit and an output side circuit, and avoids the interference of an external circuit to a control circuit.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
The reference numbers in the figures are: the circuit comprises an input terminal 1, an output terminal 2, a voltage stabilizing chip 3, an input signal pull-up resistor 4, an input signal pull-down resistor 5, an NOT chip 6, an AND chip 7, an input triode 8, an optoelectronic isolation chip input current limiting resistor 9, an optoelectronic isolation chip 10, an NPN triode base resistor 11, a PNP triode base resistor 12, an NPN triode 13, a PNP triode 14, an output light emitting diode 15 and an output light emitting diode current limiting resistor 16.
Detailed Description
Example 1
The driving circuit module capable of converting the polarity of the output power supply is used for telescopic control of the electric push rod, the control signal is 24VDC, the power range of the electric push rod is 10W-80W, and the working voltage is 24 VDC.
The model specifications of the main components and accessories of the embodiment are as follows: the input connection terminal 1 and the output connection terminal 2 are DG103-5.0-4p, the voltage stabilizing chip 3 is LM7805, the input signal pull-up resistor 4 is 8.2k omega, the input signal pull-down resistor 5 is 2.2k omega, the NOT chip 6 is SN74AHC1G04, the AND chip 7 is 74HC1G08 power transistor 8 is BU406TO-220, the photoelectric isolation chip input current limiting resistor 9 is 1.1k omega, the photoelectric isolation chip 10 is PC817, the NPN type switch transistor base resistor 11 and the PNP type switch transistor base resistor 12 are both 180 omega, the NPN type switch transistor 13 is MJE13009 130 13009TO-220, the PNP type switch transistor 14 is MJE172G, the output light emitting diode 15 is 3mm red, and the output light emitting diode current limiting resistor 16 is 100k omega.
The technical scheme adopted by the circuit connection is as follows:
the driving circuit comprises two components and parallel driving circuits with completely same wiring, and is respectively responsible for the control of a positive power supply and a reverse power supply, and each driving circuit comprises an input side circuit and an output side circuit.
As a further scheme of the present invention, the input side circuit is formed by connecting an input connection terminal 1, a voltage stabilization chip 3, an input signal pull-up resistor 4, an input signal pull-down resistor 5, a not gate chip 6, an and gate chip 7, an input triode 8, a photoelectric isolation chip input current limiting resistor 9, and a photoelectric isolation chip 10; the output side circuit is formed by connecting an NPN type triode base resistor 11, a PNP type triode base resistor 12, an NPN type triode 13, a PNP type triode 14, an output light emitting diode 15, an output light emitting diode current limiting resistor 16 and an output wiring terminal 2; wherein, the input wiring terminal 1, the output wiring terminal 2 and the voltage stabilizing chip 3 are shared by two parallel driving circuits.
As a further scheme of the utility model, pin 1, pin 2, pin 3, pin 4 of the input wiring terminal 1 are respectively connected with the positive pole of the 24V power supply, the signal input ground, the motor corotation control signal "positive" and the motor reversal control signal "negative"; pin 1, pin 2, pin 3, pin 4 of output binding post 2 connect the positive pole, negative pole, output 1 and output terminal 2 of 24V power respectively, and the 24V power of input end is converted into 5V DC power through voltage stabilizing chip 3, and 5V DC power supplies the use of the input side circuit of two parallel drive circuits.
As a further aspect of the present invention, the input signal "positive" and "negative" are divided by the pull-up resistor 4 and the pull-down resistor 5 of the input signal, and are converted into two signals about 5V, the two signals are respectively connected to the input pin 2 of the nand gate chip 6 of the driving circuit to which the pull-up resistor 4 and the pull-down resistor 5 of the input signal belong and the input pin 1 of the and gate chip 7 of another driving circuit, the output signals of the two nand gate chips 6 are respectively connected to the input pin 2 of the and gate chip 7 of another driving circuit corresponding thereto, and the nand gate chip 6 and the and gate chip 7 are both powered by the voltage stabilizing chip 3.
As a further scheme of the present invention, the output pin 4 of the and gate chip 7 is connected to the base of the input triode 8 of the driving circuit to which it belongs; the emitter of the input triode 8 is connected with the input pin 1 of the photoelectric isolation chip 10 through the photoelectric isolation chip input current-limiting resistor 9, and the pin 2 of the photoelectric isolation chip 10 is connected with the input ground.
As a further scheme of the present invention, pin 4 of the optoelectronic isolation chip 10 and the collector of the NPN type triode 13 are connected to the output power supply, and pin 3 of the optoelectronic isolation chip 10 is connected to the base of the NPN type triode 13 and the base of the PNP type triode 14 through the NPN type triode base resistor 11 and the PNP type triode base resistor 12, respectively; an emitting electrode of an NPN type triode 13 of the positive power circuit is connected with an emitting electrode of a PNP type triode 14 of the reverse power circuit and then connected to a pin 3 of an output wiring terminal 2, an emitting electrode of the PNP type triode 14 of the positive power circuit is connected with an emitting electrode of the NPN type triode 13 of the reverse power circuit and then connected to a pin 4 of the output wiring terminal 2, an output light emitting diode 15 and an output light emitting diode current limiting resistor 16 are connected in series and then respectively connected with an emitting electrode of the NPN type triode 13 of the positive and negative power circuits and a pin 2 of the output wiring terminal 2, and a pin 1 and a pin 2 of the wiring terminal 2 are respectively connected with a positive electrode and a negative electrode of an output power supply.
As a further scheme of the present invention, when the input of the "positive" terminal of the input connection terminal 1 is high level and the input of the "negative" terminal is not input, the OUT1 terminal of the output connection terminal 2 is the positive electrode of the power supply and the OUT2 is the ground of the power supply; when the input of the 'inverse' terminal of the input connecting terminal 1 is high level and the 'positive' terminal is not input, the OUT2 terminal of the output connecting terminal 2 is the positive pole of the power supply and the OUT1 is the ground of the power supply; when the inputs of the positive terminal and the negative terminal of the input wiring terminal 1 are both high level or low level, the output side circuit has no output.
The drive circuit can change the polarity of the output power supply or stop outputting according to the state of the control signal of the input end, and the two circuits have an interlocking function. The polarity of the power supply at the output end is changed by setting the positive input end and the negative input end to be high level, so that the rotation direction of the connected direct current motor is controlled.
Example 2
The drive circuit module capable of changing the polarity of the output power supply is used for controlling the electric elevator. The control signal is 3.3-30VDC, the power range of the electric elevator is 150-250W, and the working voltage is 24 VDC.
The main components and accessories of the present embodiment have the following specifications: the input connection terminal 1 and the output connection terminal 2 are KF128-3.81-4P, the voltage stabilizing chip 3 is LM2576, the input signal pull-up resistor 4 is 7.5k omega, the input signal pull-down resistor 5 is 2.4k omega, the NOT chip 6 is NC7S04, the AND chip 7 is 74V1T08CTR, the power triode 8 is 9013, the optoelectronic isolation chip input current-limiting resistor 9 is 1k omega, the optoelectronic isolation chip 10 is TLP521, the NPN type switching triode base resistor 11 and the PNP type switching triode base resistor 12 are both 200 omega, the NPN type switching triode 11 is a patch SOT-23-J3Y, the PNP type switching triode 12 is D45H11G, the output light-emitting diode 15 is 0805 packaged red, and the output light-emitting diode current-limiting resistor 16 is 110k omega.
The circuit connection technical scheme of the present embodiment is the same as that of embodiment 1.
While the present invention has been particularly shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (7)
1. A kind of driving circuit which can change the polarity of the output power, its characteristic is: the driving circuit comprises two components and parallel driving circuits with completely same wiring, and is respectively responsible for the control of a positive power supply and a reverse power supply, and each driving circuit comprises an input side circuit and an output side circuit.
2. A driver circuit for switching output power supply polarity according to claim 1, wherein: the input side circuit is formed by connecting an input wiring terminal (1), a voltage stabilizing chip (3), an input signal pull-up resistor (4), an input signal pull-down resistor (5), a NOT gate chip (6), an AND gate chip (7), an input triode (8), a photoelectric isolation chip input current limiting resistor (9) and a photoelectric isolation chip (10); the output side circuit is formed by connecting an NPN type triode base resistor (11), a PNP type triode base resistor (12), an NPN type triode (13), a PNP type triode (14), an output light emitting diode (15), an output light emitting diode current limiting resistor (16) and an output wiring terminal (2); the input wiring terminal (1), the output wiring terminal (2) and the voltage stabilizing chip (3) are shared by two parallel driving circuits.
3. A driver circuit for switching output power supply polarity according to claim 2, wherein: a pin 1, a pin 2, a pin 3 and a pin 4 of the input wiring terminal (1) are respectively connected with a positive electrode of a 24V power supply, a signal input ground, a positive motor rotation control signal and a negative motor rotation control signal; and a pin 1, a pin 2, a pin 3 and a pin 4 of the output wiring terminal (2) are respectively connected with the anode, the cathode, the output 1 and the output end 2 of a 24V power supply, the 24V power supply at the input end is converted into a 5V direct-current power supply through the voltage stabilizing chip (3), and the 5V direct-current power supply is used by an input side circuit of two parallel driving circuits.
4. A driver circuit for switching output power supply polarity according to claim 2, wherein: the input signals 'positive' and 'negative' are subjected to voltage division through an input signal pull-up resistor (4) and an input signal pull-down resistor (5) and converted into two signals of about 5V, the two signals are respectively connected to an input pin 2 of a NOT gate chip (6) of a driving circuit to which the input signal pull-up resistor (4) and the input signal pull-down resistor (5) belong and an input pin 1 of an AND gate chip (7) of the other driving circuit, output signals of the two NOT gate chips (6) are respectively connected with an input pin 2 of the AND gate chip (7) of the other driving circuit corresponding to the two NOT gate chips respectively, and the NOT gate chip (6) and the AND gate chip (7) are powered by a voltage stabilizing chip (3).
5. A driver circuit for switching output power supply polarity according to claim 2, wherein: an output pin 4 of the AND gate chip (7) is connected with a base electrode of an input triode (8) of the driving circuit to which the AND gate chip belongs; an emitting electrode of the input triode (8) is connected with an input pin 1 of a photoelectric isolation chip (10) through a photoelectric isolation chip input current limiting resistor (9), and a pin 2 of the photoelectric isolation chip (10) is connected with an input ground.
6. A driver circuit for switching output power supply polarity according to claim 2, wherein: a pin 4 of the photoelectric isolation chip (10) and a collector of the NPN type triode (13) are connected with an output end power supply, and a pin 3 of the photoelectric isolation chip (10) is connected with a base of the NPN type triode (13) and a base of the PNP type triode (14) after passing through an NPN type triode base resistor (11) and a PNP type triode base resistor (12) respectively; an emitting electrode of an NPN type triode (13) of the positive power supply circuit is connected with an emitting electrode of a PNP type triode (14) of the reverse power supply circuit and then connected to a pin 3 of the output wiring terminal (2), an emitting electrode of the PNP type triode (14) of the positive power supply circuit is connected with an emitting electrode of the NPN type triode (13) of the reverse power supply circuit and then connected to a pin 4 of the output wiring terminal (2), an output light emitting diode (15) and an output light emitting diode current limiting resistor (16) are connected in series and then respectively connected with an emitting electrode of the NPN type triode (13) of the positive power supply circuit and a pin 2 of the output wiring terminal (2), and a pin 1 and a pin 2 of the wiring terminal (2) are respectively connected with a positive electrode and a negative electrode of an output end power supply.
7. A driver circuit for switching output power supply polarity according to claim 2, wherein: when the positive terminal input of the input connecting terminal (1) is high level and the negative terminal is not input, the OUT1 terminal of the output connecting terminal (2) is the positive electrode of a power supply and the OUT2 terminal is the ground of the power supply; when the input of the 'inverse' terminal of the input connecting terminal (1) is high level and the 'positive' terminal is not input, the OUT2 terminal of the output connecting terminal (2) is the positive electrode of a power supply and the OUT1 is the ground of the power supply; when the inputs of the positive terminal and the negative terminal of the input wiring terminal (1) are both high level or low level, the output side circuit has no output.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122714027.5U CN217469748U (en) | 2021-11-08 | 2021-11-08 | Driving circuit capable of changing output power supply polarity |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122714027.5U CN217469748U (en) | 2021-11-08 | 2021-11-08 | Driving circuit capable of changing output power supply polarity |
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| CN217469748U true CN217469748U (en) | 2022-09-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116865082A (en) * | 2023-07-10 | 2023-10-10 | 深圳市通甪科技有限公司 | Laser optical gate device and laser treatment equipment |
| CN117148780A (en) * | 2023-11-01 | 2023-12-01 | 深圳和润达科技有限公司 | PLC input/output polarity automatic switching device, switching method and electronic equipment |
-
2021
- 2021-11-08 CN CN202122714027.5U patent/CN217469748U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116865082A (en) * | 2023-07-10 | 2023-10-10 | 深圳市通甪科技有限公司 | Laser optical gate device and laser treatment equipment |
| CN117148780A (en) * | 2023-11-01 | 2023-12-01 | 深圳和润达科技有限公司 | PLC input/output polarity automatic switching device, switching method and electronic equipment |
| CN117148780B (en) * | 2023-11-01 | 2024-01-26 | 深圳和润达科技有限公司 | PLC input/output polarity automatic switching device, switching method and electronic equipment |
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